ITEM: Energy Efficient LED based Luminaire for passenger coaches

Final Reasoned Documents on the above item incorporating firms comments, discussion held at RDSO on 21.03.2016 among RDSO, LED light manufacturers, LED

manufacturers, Zonal Railways & Production Units and letters received from some Zonal Railway .

Cl. No.

As per Draft Specification no. RDSO/PE/SPEC/TL/0091-2016 (Rev‘1’)

uploaded on website

Comments received RDSO’s comments

1.1. New Coaches: The scope includes design, development, manufacturing, testing and supply of energy efficient luminaires suitable for operation on 110V AC/DC supply complete with all accessories, LED lamps compatible with suitable current control driver circuit including mounting arrangement for illumination in the all type of passenger coaches i.e. air conditioned coaches, non air conditioned (sleeper), Chair car, LHB and new coaches for all passenger Trains including Rajdhani and Shatabdi Express trains as per the drawings enclosed as ANNEXURES. The luminaires shall be of rugged and robust design suitable for Railway rolling stock working on Indian Railways under the operational and environmental conditions encountered during service as specified in clause 4.0. Types of luminaire covered in this specification are shown in table-1:

TABLE-1 (TYPE OF LUMINAIRE)

Sl.No. Type of Luminaire

Maximum Wattage of complete Luminaire

Usage of Luminaire

For Conventional coaches

1. Type –A 18 Watt Passenger area (Cabin) for conventional AC & LHB non AC coaches

R.T. Vision Passenger alarm chain indication light shall be <3Watt using colored RED Leds of prescibed makes through hole/smd type. Annexure 13- The chain indication light should be made rectangular to make it unidirectional with sufficient space. Reading lights should be made less than 2watt to reduce load at the same time maintaining the required ilumination which is now possible due to improvement in LEDs lumen from 100 to 150 lumen per watt i.e by 50%. There are multiple type of reading lights efforts should be made to make only one standard reading light which should not get effected with mirror image or seat direction. For Shatabdi chair car two types of LED reading lights are there efforts should be made to make one type of reading light capable to be fitted in multiple of two or three as desired by the number of seats. Integral Coach Factory, Chennai 1. It is stated that LED luminaires shall be suitable for

operation on 110V AC/DC supply, whereas the operating voltage range is mentioned as 90V-140V AC/DC vide clause 4.2. It may be noted that the voltage range of 90V to 170V is required for operation with 110V ac supply mainly for EMU application and hence voltage range prescribed under clause 1.3, 4.2 &

3W in place of 5W accepted as 3W may be adequate for Passenger alarm chain indication light, it shall visible from both driver & guard side. Already exists in the specification. Not accepted. As one type of reading light will require separate channel to fit into it. For EMU, the Voltage range may be considered as 90-170V AC/DC

2. Type –B 9 Watt Corridor of conventional AC coaches.

Passenger area (Cabin & Corridor) of conventional non AC coaches.

Doorway & Gangway of AC Coaches/Chair Car coaches

3. Type –C 5 Watt Doorway & Gangway of non AC Coaches

4. Type –D 5 Watt Lavatory/Mirror

5. Type –E 1 Watt Night light luminaire cum berth indication for Conventional AC coaches

6. Type –F1

2 Watt Berth reading light (Longitudinal)

7. Type –F2

2 Watt Berth reading light (Common)

8. Type –G 1 Watt Emergency Exit Indication light

9. Type –H 1 Watt Luminaire for Toilet indication in AC coaches

10. Type–I 5 Watt Passenger alarm chain indication light

11. Type-J 5 Watt Luminaire for SLR coaches

6.12 needs to be reviewed in line with the requirement specified in the electronic ballast specification NO. TL/0011-2000 Rev.1 for 110V ac operation. Based on this, voltage reference mentioned at clause 7 (page no.18) and clause 15 (page no.19) may also be reviewed.

2. Table 1

a. Type A luminaire: Usage of this luminaire referred for LHB non AC coaches may be shifted to Type B luminaire as wattage of lamp is not relevant.

b. Type B luminaire: (i) 9 W power is prescribed for corridor side luminaire for

conventional AC coaches. Presently, ICF is using 2 x 18 W FL in passenger area as well as corridor area of conventional AC coaches. Hence, adequacy wattage of lamp prescribed for corridor side of conventional AC coaches may be reviewed.

(ii) Usage of luminaire is mentioned for Doorway in AC coaches/Chair Car. There is no provision of doorway fittings in any of the AC coaches; only entrance light and gangway lights are being used. Hence requirement of Doorway luminaire needs review.

c. Type C luminaire: Presently, ICF is using 1 x 18 W FL in the doorway area of non-AC coaches. Hence, the wattage of lamp mentioned as 5 W for doorway fitting in non-AC coaches may be reviewed. It may also be noted that no entrance lights are provided in non-AC coaches. Hence, it is recommended to have higher Wattage lamps for the doorway which will be helpful for the passengers whenever the non-AC coaches are placed beyond platform area during service.

d. Type E luminaire: ICF is already using LED based night light cum berth indication in non-AC coaches. Hence, usage of luminaire under this type shall cover non-AC coaches also.

May be corrected. 9W luminaire shall be used for corridor. However, if in future need of higher wattage is felt, it may be reviewed. If required, may be provided. In may be enhanced to 9W similar to Type B, to reduce the numbers of variants. OK, 9W luminaire may be provided. May be considered and be added in the specification.

12. Type-K 5 Watt Entrance doorway

For LHB AC Coaches

13. Type-L 18Watt Passenger area (Cabin)

14. Type-M 9 Watt+1W Corridor light with night light

15. Type-N 9 Watt Doorway/ Gangway Area

For chair car

16. Type-O 18 Watt Passenger area

17. Type-P -- Dummy fitting

18. Type-Q1 2Watt Reading light for AC chair car (2-Seater)

19. Type-Q2 2Watt Reading light for AC chair car (3-Seater)

Note: i. Tentative details of overall size and cut out of various types of Luminaire are

shown in the Annexure-3. ii. Each type of luminaire shall be supplied with the

associated driver circuit and required optics. Driver card as well as complete luminaire shall have validation by LED manufacturer for its compatibility.

e. Type F1 & F2 luminaire: In self-generation AC coaches, BRL fittings Type F1 & F2 as covered in RDSO specification are sufficient. However, Type F1 dimension to be changed as mentioned in Annexure – A. Whereas in LHB design coaches, four types of BRL fittings are being used. RDSO to examine and standardise luminaire common for both Self-generation type and LHB design coaches.

f. Type H luminaire: (Annexure 12): Pictorial signage on par with international practice may be incorporated for the Toilet occupied light.

g. Type J luminaire: The type of fitting shown is not a flush mounted type as wire mesh is projecting out from the fitting base by 50mm, which is not desirable. This fitting is intend to use inside luggage area of SLR coaches, where recess type is required. Hence, recess type fitting may be evolved in this category.

h. Presently, ICF is using 4’ FL light fittings suitable for 4 x 18W FL in SG AC Chair Car coaches. Hence, the wattage of lamp may be reviewed and new type may be evolved for SG type AC chair car.

i. S.No.16-19 belongs to LHB design AC Chair Car coaches. Hence, the heading may be mentioned as ‘LHB type AC Chair Car’.

j. S.No 18 & 19 (Type Q1 & Q2) – Reading lights in LHB AC Chair Car coaches are part of luggage rack and same is being procured by Mechanical wing. Hence, requirement of this category may be reviewed.

M/s Dhingra Engineering Work Table 1 - Type F1,F2 and Type Q1,Q2. For Reading light the LED used is a 3Watts LED for each light. Rail Coach Factory, Kapurthala Type of Luminaire F-1 & F2 Presently, 4 types of LED berth reading lights as per following details are being used in the LHB 2 Tier & FAC coaches.

Details and drawings to be added in the specification. Drawing have been prepared by RCF/ICF and incorporated in specification. Provision of 50mm wire mesh is considered to get the illumination in case of loading of the luggage up to the roof level. Drawings have been incorporated in the specification. Agreed and corrected in the specification. It is to be done as per specification. Not agreed as 2W is sufficient. Agreed and necessary drawings are incorporated in the specification.

SN Description

of fitting

Drg. No. Location

01 Berth

Reading

Light

LW 76020

Alt. ‘g’

Transverse lower

berth (LHS)

02 Berth

Reading

Light

LW 76021

Alt. `g’

Transverse lower

berth (RHS)

03 Berth

Reading

Light

LW 76022

Alt. `g’

Longitudinal Berth

(LHS)

04 Berth

Reading

Light

LW 76023

Atl. `g’

Upper Berth

The 4 berth reading lights are essentially required from the point of view of orientation and light focus . Since berths in a cabin are in mirror image, the light has also ought to be in mirror image. It is noted that berth reading lights for lower berth of a cabin - transverse RHS, transverse LHS and for upper berths have been made common. It is not possible to make these 3 BRLs from the point of view of orientation, light focus requirement and space availability. Therefore, 4 BRLs as presently being used may be retained as it is. RCF is presently using 3 W single LED module, which is available as a standard product, for LED BRLs. The selection of wattage of the fitting as 3 W was based on the fact that lower wattage standard module (2 W) in single LED was not available. RDSO may, therefore, examine whether 2 W single standard LED module is available, if not, then 3 W single LED module BRLs should be continued.

Not agreed as 2W is considered to be adequate.

Type of Luminaire I (SN-10) In the drawing of the light given in Annexure-13, the LED module has been indicated on one side only whereas for PACIL, LED module is required in both the sides. Drawings accordingly may be modified. Table 1: Type of Luminaire J (SN-11) In the drawing of the light given in Annexure-14, two wire meshes for the protection have been used. RDSO may examine whether two wire meshes are required or only one. RCF is of the view that recess type design may be provided thereby outer mesh may not be used. Table 1: Type of Luminaire O (SN-16) Presently, 2x 18 W FL fitting with 5 W LED night light are being used in the LHB AC chair car. RCF is of the view that there is no requirement of night light in LHB AC Chair Car coaches. Therefore, RDSO may review to delete the provision of night light in the LHB AC chair car compartment. Table 1:Type of Luminaire Q1 & Q2 (SN-18 & 19) RCF is presently using 3 W single LED modules, which is available as a standard product, for LED Reading Light. The selection of wattage of the fitting as 3 W was based on the fact that lower wattage standard module (2 W) in single LED was not available. RDSO may, therefore, examine whether 2 W single standard LED module is available, if not, then 3 W single LED module Reading Lights should be continued.

LED Light fitting for LHB Non AC Chair Car is not included in the table and also in the annexure. Presently, FL fittings using 2 Ft. T-5 tubes are being used in LHB Non AC Chair Car. It has been examined that existing proposed LED type fitting for AC Chair Car cannot be used in Non AC Chair Cars. As such, a separate LED fitting for LHB Non AC Chair Car for compartment area is to be used the drawing for which shall be sent to RDSO for inclusion in the specification.

Agreed, Drawing is to be corrected. 2 wire mesh type design is considered to avoid darkness after loading / filling the material up to the roof level. Agreed. Provision of 5 W LED night light have been deleted from the specification. Not agreed as 2W is adequate for the purpose. Agreed & necessary drawings are incorporated in the specification.

Type C, Type D, Type J and Type K Luminaire should also be made 9 watt instead of 5 watt, for reducing the no. of fittings and replaceability of driver. Table – 1 (Type of Luminaire) Note below Table – 1 of clause 1.1 indicates tentative details of overall sizes and cut-outs of various types luminaires are shown in Annexure-3. This Note i. is required to be deleted because RCF has made the drawings for all type of luminaires for LHB as well as Non-LHB Coaches. General Auto Electric Corporation 1. The wattage of some luminaires can be reduced

Passenger alarm chain indication light 2-3Watt

Reading light should be 1.5watt. 2. The berth reading light to be made uniform to maintain

single type inventory for all type of berth reading light. 3. The Passenger alarm chain indication light should be

made square or rectangle enabling production in sheet metal and making it uniform both for ICF and RCF.

4. 18 and 9 watt fittings for cabin and corridor of conventional coaches should be made a single head under 18 or 9 watt to maintain single inventory.

5. The driver of 4 to 18 Watts should have 24Volt DC output and other drivers should have 12Volt DC output.

M/s Electronic Equipment Co. Pvt. Ltd., We propose to reduce Wattage of Passenger alarm chain indication light to 2 Watt and Berth Reading Light to 1-2 Watt. Instead of multiple different type of drawings for Berth Reading lights, Corridor and cabin lights a common type product will reduce inventory. Modern Coach Factory, Raebareli MCF/RBL has commissioned energy LED based luminaires in one coach and found less lux level in lavatory with 5W energy efficient LED based luminaires. Therefore, wattage to be increased.

Agreed for provision of 9W Luminaire. Agreed and deleted. 3W is considered to be adequate. 2W is considered to be adequate. Not seems to be possible Already mentioned in the specification. Not agreed. Agreed, mentioned in the specification. Passenger Alarm Chain Indication Light – 3W and Berth Reading Light – 2W is considered to be adequate. Accepted. 9W luminaire is incorporated in the specification.

Northern Railway The rating of Type A luminaire may be reviewed as the purpose of LED lighting in energy efficiency, 9W is sufficient. LED based Embarkment Light, 9Watt & Linen Room Light, 6Watt as fitted in Mahamana Express shall also be included. Western Railway vide letter no. EL/90/2/46/3 (LED) dated 31.03.16 Following para to be incorporated:

SN Type of luminaire Max. Wattage of complete luminaire

Usage of luminaire

For EMU

20 Type to be designated by RDSO

36W* (4 feet)

Passenger area of MRVC I & II

21 Type to be designated by RDSO

18W* (2 feet)

Passenger area of Retrofitted & conventional ICF AC EMU

For MEMU

22 Type to be designated by RDSO

20W* (2 feet)

Passenger area of MEMU

*Existing wattage of FL luminaire. Same needs to be replaced by suitable LED based luminaires of appropriate wattage to achieve level of illumination.

Not agreed. 18W luminaire is required for sufficient illumination. May be arranged separately. Suitable fittings for Conv. EMU / MEMU & 3 Phase EMUs have been incorporated in the specification. Modified Table/ note: Please see Final draft specification

1.2 Retro-fitment of lamps in the existing/old coaches: The scope includes design, development, manufacturing, testing and supply of 9W and 5W

R.T. Vision The light should be IP65 either tubular/ rectangular LED Lamps with suitable driver to be retrofittable in the existing holder/housing. This shall give more options for

No, Only tubular lamp with inbuilt driver is considered for retro fitment.

tubular LED lamps with suitable in-built driver, to be fitted in the existing holders provided for 18W fluorescent lamp (FL) and 11W compact fluorescent lamp (CFL) respectively being used as a light source in all type of coaches of Indian Railways. The lamp shall have IP-65 protection as per IEC-60529.

retrofitment. Western Railway The lamp types included in the spec. are for retro-fitment against 18 Watt Fluorescent and 11 watts CFL lamps only. Following type of lamps may also be included in the specifications. 1. Suitable for retro fitment in existing single and twin CFL

fittings. The nominal length of the glass tube shall be 75 mm. (existing CFL 5 watts)

2. Suitable for retro fitment in existing incandescent lamp fitting with Bayonet Cap base confirming to design standard – B22. (existing incandescent 25 watts)

3. Suitable for retro fitment in existing incandescent lamp fitting with Edison Screw base confirming to design standard – E27. (existing incandescent 25 watts)

Suitable for retro fitment in existing incandescent lamp fitting with Bayonet Cap base confirming to design standard – B22, (existing incandescent 15 watts) Following to be incorporated: (As per letter No. EL/90/2/46/3 (LED) dated 31.03.16) “The scope also includes design, development, manufacture, testing & supply of tubular LED lamps suitable for EMU & MEMU application for retrofitment in existing holder provided for 36W, 18W (for EMU) and 20W (For MEMU) fluorescent lamp”. Integral Coach Factory, Chennai (i) Tubular LED lamps with suitable in-built driver has been

specified under this clause for retro-fitment of lamps in the existing/old coaches, whereas the LED requirement mentioned in clause 5 (b) and 5 (j) as individual LEDs/LED array, which is contradictory. It is suggested that LED array type fittings only to be developed, which will takes care of retro-fitment purpose also.

(ii) IP 65 Protection level is prescribed under this clause. The need for this IP protection level may be reviewed as it will be very difficult to achieve and will also have

Indicated in the specification Indicated in the specification Indicated in the specification Indicated in the specification Suitable LED lamp for retrofitment in Conv. EMU / MEMU & 3 Phase EMUs have been incorporated in the specification. LED array type fittings for new coaches and tubular type lamps are for retro-fitment in old coaches. IP-65 protection will be appropriate.

impact on cost of the fittings. General Auto Electric Corporation 1. To achieve IP65 and UL94V0 which is very important this light should be made flat type example rectangle in place of tubular type. 2. The light should be mounted on existing screws places in place of existing holders. 3. Provision to retrofit condemed fittings in existing coaches to be added where hole mounting are differen then existing drawings. M/s Electronic Equipment Co. Pvt. Ltd., To maintain IP65 in the product we propose for a rectangular design rather than a tubular. Northern Railway The lamp types included for retro-fitment are against 18Watt Fluorescent and 11 Watts CFL lamps only. Incandescent lamps shall also be included for retro-fitment.

Not accepted as tubular lamps can also be with IP65 and UL94V0 Existing holders will be used for easy maintenance Not accepted. Only tubular type lamps are for retro-fitment in old coaches Not accepted in view of retro fitment Incandescent lamps have also been included in the specification for retro-fitment Modified clause: Please see Final draft specification

1.3 Input to the luminaire will be fed through battery bank of 110V dc in parallel with alternator, rectifier cum regulator. The luminaire shall be suitable for operating voltage range available as input i.e. 90V to 140V DC with 15% ripple. There may be surges in input supply with peak value of approximately 350V. However, it is advised that the firm may measure the harmonic distortion and Surges in the Coach before designing the LED based luminaire. The over voltage trip shall be set between 150V to 155V DC.

R.T. Vision The input should be 90to140V DC/AC in place of 90to140V DC. . The over voltage trip shall be set at ≥200V for DC and ≥150V AC. A. Paul The over voltage cut-off range is very narrow set at 150-155V DC. Most LED driver are capable of being operated well over 155V DC. Over voltage limit may be set to above 150V DC, as long as the light unit is not damaged due to the over voltage. This has implications on reliable driver design suitable for mass production without need for calibration during production. M/s Dhingra Engineering Work The cut off should be at 200V DC Rail Coach Factory, Kapurthala

Accepted, corrected in the specification as “The over voltage trip shall be set between 200V to 205V DC”. The over voltage trip shall be set between 200V to 205V DC Corrected in the specification

“Input to the luminaire will be fed through battery bank of 110 V DC in parallel with battery charger feeding through 60/15/9 KVA 750/415 V transformer in LHB coaches” should also be mentioned in the clause.

The over voltage trip is specified between 150 V to 155 V DC which is less than peak value of 110 V AC, same may be reviewed. It should be set between 195 to 200 V DC for the luminaire to work with AC voltage range of 90 to 140 V AC/DC. General Auto Electric Corporation Voltage range should be made 90 -140V DC/AC. The over voltage trip to be fixed ≥ 200V in DC & ≥ 170V in AC. Protection/trip for overload is to be specified. M/s Electronic Equipment Co. Pvt. Ltd., Operation should be 90 - 140V AC and DC The over voltage trip has to be ≥ 200V DC to achieve 150 VAC. The 5,9 and 18Watt drivers standard output voltage is 24V DC. The 2 and 3 Watt drivers the standard output voltage is 12Volts. North Western Railway Retro-fitment type LED lamps proposed to be used in existing SG (110V DC) and EOG type (110V AC) coaches. These LED lamps should be compatible to be operated on 110V DC as well as 110V AC supply system. Northern Railway This only stipulates DC supply, however, it should be for AC & DC both, as in EOG coaches the available supply is 110V AC. Western Railway (As per letter No. EL/90/2/46/3 (LED) dated 31.03.16) This only stipulates DC supply, however, it should be for AC & DC both, as in EOG coaches the available supply is 110V AC. Following to be incorporated:-

Accepted. Mentioned in the specification. Accepted, clause modified Accepted, clause modified Accepted, clause modified Exists in the specification Specification calls for AC & DC both This has been incorporated in the specification.

For EMU “The luminaires shall be suitable for operating voltage range available as input as given below:- i) In Retrofitted & ICF AC EMU 141V AC supply is fed

directly from main Transformer Auxiliary winding. ii) In MRVC I & II EMU rake, 110V AC supply is fed from

Auxiliary converter. In both the cases above for emergency purpose, luminaires have to work also on battery bank at 110V as emergency supply”. For MEMU “The luminaires shall be suitable for operating voltage range available as input as given below:- i) General lighting of MEMU coaches is provided by 141V

AC supply which is provided from Auxiliary winding No. 2 of main transformer.

ii) The emergency lighting is provided by 110V DC supply is backed up by battery system of 90Ah capacity.”

RDSO may please indicate the variation in input voltages as same is not available at this end.

Suitable voltage range for Conv. EMU/MEMU and 3 Phase EMU has been mentioned in the specification. Modified clause: Please see Final draft specification

3.0 REFERRED STANDARDS: The latest following standards shall be referred to

IEC 62504/ IS 16101

: General lighting – Light emitting diode (LED) products and related equipment – Terms and definitions

IEC 62560/ IS 16102

: Self-ballasted LED lamps for general lighting services Part-1-Safety requirements

IEC 62612/ IS 16102(Pt-2)

: Self-ballasted LED lamps for general lighting services Part-1-Performance requirements

IEC 60598-1 : Luminaires- General requirements and tests

IEC 62707-1 : LED Binning-Part 1 General requirements and white grid

IEC 62717/IS : LED modules for general

R.T. Vision OK Relevant IEC as per application shall be applicable. Following are not applicable in case of LED Lighting 1. IS 16102 2. IS 16101 D.R. Auto IS 16102 part1 & Part 2 - Fixture is not a self-ballasted lamp so IS16102 is not applicable. IS16103 part 2 & part 1 - Fixture is not a LED module so IS16101 is not applicable. MIC Electronics Limited, Hyderabad Fixture is not a self-ballasted lamp so IS16102 is not applicable. Fixture is not a LED module so IS16101 is not applicable.

Accepted, IS 16102 & IS 16101 has been deleted from the specification IS 16102 &IS 16101 has been deleted from the specification IS 16102 &IS 16101 has been deleted from the specification

16103(Pt-2) lighting-performance requirements

IEC 61347-2-13 : Particular requirements for DC or AC supplied control gear for LED modules

IEC 62384/ IS 16104

: DC or AC supplied electronic control gear for LED modules- performance requirements

IEC 62722-2-1 : Luminaire performance Part-1 : General requirements and Part-2-1 : Particular requirements for LED luminaire

IEC 62031/IS16103(Pt-1)

: LED modules for general lighting – Safety specifications

IEC 61347-1 : Lamp controlgear – General and safety requirements

IS 16107 (Part-1)

: LED luminaires for general lighting purposes Part 1 safety requirements

IEC 62471/ IS 16108

: Photobiological safety of Lamps and Lamp system

IS 16107 (Part-2)

: LED luminaires for general lighting Part 2 Performance requirements

IS: 513 : Cold-rolled low carbon steel sheets.

IEC 60529 : Classification of degree of protections provided by enclosures.

IEC 60571 : Electronic equipment used on Railway vehicles.

ELRS/SPEC/S1/0015-OCT, 2001 (Rev.0)

: Specification of Electronics used in Rolling Stock Application.

IEC 61373 : Shock and Vibration Tests for rolling stock application

IEC 61000 : Electromagnetic compatibility

(EMC)

LM-79 / IS16106

: Electrical and photometric measurement of solid state lighting (LED) products

LM-80 / IS16105

: Method of measurement of lumen maintenance of solid state lighting (LED) sources

TM-21-11 : Projecting long term lumen maintenance of LED light

UIC-555 : Electric lighting in passenger rolling stock

4.2 Working Conditions

Train Speed : 160 km/h

Supply voltage : 110 V AC/ DC

Voltage range : 90V-140 V AC/ DC

Vibration and shocks

Maximum vertical acceleration 3.0 g Maximum lateral acceleration 3.0 g Maximum longitudinal acceleration 3.0 g (‘g’ being the value of acceleration due to gravity)

Frequency & Amplitude Sinusoidal form of vibration, the frequency ‘f’ lies between 1 Hz and 100 Hz. The amplitude ‘a’ expressed in mm is given as a function of ‘f’ by the equation a = 25 / f for value of ‘f’ between 1 Hz and 10 Hz a = 250/ f

2 for value of ‘f’ between 10 Hz and

100Hz Because of track irregularities, level of shocks and vibrations to which the luminaire are exposed are far more than actually given in

R.T. Vision OK , Over voltage trip should be as per the clause 1.3. Over load trip is also required. Integral Coach Factory, Chennai Train speed is mentioned as 160 kmph, which may be modified as 200 kmph considering the future requirement. Rail Coach Factory, Kapurthala The train speed should be specified as 200 kmph instead of 160 kmph.

It is considered as 200V-205V DC Accepted, corrected as 200 kmph in the specification Accepted, corrected as 200 kmph in the specification Modified clause: Please see Final draft specification

IEC for on board (Ceiling) mounting arrangement. Measured data of vibration levels at critical locations of light fitting and its mounting arrangement of existing fittings, which can be used for design and in case of any doubt, the manufacturer must carry out instrumented trials on existing stock for measurement of shocks and vibrations in consultation with Production Units at design stage only. The fitting and its mounting arrangement shall be so designed that the performance is not adversely affected due to such high vibrations and shocks.

4.3 The manufacturer shall provide “In the field service support” during guarantee period.

Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore

Once the manufacturer of LEDs has been stipulated by the

RDSO as per clause 5.g, it is not fair that even for a simple

LED failure the manufacturer of the fixture provide the

service support called for on the field. Besides, the product

being of low value unlike air conditioners or lifesaving

equipment, replacement spares can always be kept with

the user Railways for quick and easy substitution, without

the manufacturer incurring costs, which will finally be

transferred to the Railways

Not accepted. Field support is essential.

5.0 a)

Tentative details of Luminaire-housing with outer dimensions are indicated in Annexure 4 to 22. These dimensions are tentative and shall be finalised based on the performance requirement i.e. uniformity level of at least 1:1.3 as per norm of UIC 555 shall be achievable in space available in accordance with Annexure-1. However, it is expected that only minor variations shall be accepted. The detailed calculation for lux level, uniformity in distribution as per clause no. 5.11 & 5.12 including the lux distribution curve /graph/spatial distribution shall be submitted in support of the dimensions selected and variation thereof. Housing of luminaire shall be made of 1.00 mm thick Steel sheet conforming to IS: 513 (Grade O) Or

R.T. Vision The Housing of luminaire where LEDs are placed shall be made of minimum 1.00 mm thick aluminium sheet/extrusion for heat dissipation from the body and maintaining Tj<85ºC. The aluminium preferably to grade of 6000 series or similar to high conductivity heat sink material for heat dissipation. Other parts of the luminaire can be made with 1mm thick Mild Steel conforming to IS: 513 (Grade O/DD) or 1mm thickaluminiumor 1 mm SS304 grade stainless steel. Western Railway CONSTRUCTION: Housing of the luminaire shall be made

Material is to be used as per specification. Material is to be used as per specification. Accepted, corrected as Grade DD Material is to be used as per

1.50mm thick aluminum sheet having high conductivity preferably to grade of 6000 series or similar to high conductivity heat sink material or SS304 grade stainless steel. The front cover (if required) shall be made of 1.00mm thick SS-304 grade stainless steel. Efforts shall be made to keep the overall outer dimensions as minimum as possible.

of 0.8 mm thick steel sheet confirming to IS:513 (Grade O) or 1.50 mm thick aluminium sheet having high conductivity preferably to grade of 5000 series. As per clause 5.0 (l), The weight of the luminaire is restricted to 1.5 kg, therefore the size of the steel sheet need to be 0.8 mm. Aluminium sheet having high conductivity preferable to grade 6000 series is not readily available Integral Coach Factory, Chennai Use of aluminium extrusion for the housing of the luminaire may be explored as it has better thermal property. M/s Dhingra Engineering Work There are no clause No. 5.11 and 5.12 mentioned in this specification. Rail Coach Factory, Kapurthala Tentative details of Luminaire – Annexure: 4 – 23 to be deleted because RCF has made drawings. Material for housing of luminaire specified as Steel sheet conforming to IS:513 (Grade O). Presently, steel sheet conforming to IS: 513 Grade DD is used. Grade DD is superior than Grade O. RDSO may examine to change the grade of steel sheet to Grade DD. Revised drawings of different types of luminaire mentioned in the specification are enclosed as Annexure to the specifications. Performance requirement of the complete luminaire shall have uniformity level of at least 1:1.3 as per UIC 555 norms in accordance with Annexure I. The detailed calculations for Lux level, uniformity in distribution as per Clause 5.11 and 5.12 including the lux distribution shall be submitted in support of the dimensions selected and variation thereof. Material and specification for the housing and the other sub-assemblies / components of the luminaire shall be indicated in the respective drawing for various type of fittings. Vide letter No. ED-2009/RDSO/ED-2030/0086 dated

specification. Weight of the luminaire shall be as low as possible as drawings have already been incorporated in the specification. Agreed as aluminium has better thermal property, mentioned in the specification It has to be corrected in Clause No. 5.0 a as “6.12 & 6.13”. Deleted Use of grade DD is accepted. The clause has been modified suitably

09.04.16 – The clause is to be modified as “Detailed drawings of different types of luminaire mentioned in the specificiato are enclosed as Annexure to the specification. Performance rquiremnet of the complete luminaire shall have uniformity level of at least 1:1.3 as per UIC 555 norms in accordance with Annexure I. The detailed calculations for Lux level, uniformity in distribution as per Clause 5.11 and 5.12 including the lux distribution curve/graph/spatial distribution shall be submitted in support of the dimensions selected and variation thereof. Material and specification for the housing and the other sub-assemblies / components of the luminaire shall be indicated in the respective drawing for various type of fittings. General Auto Electric Corporation 1. LED enclosure should be made of 1 mm thick

aluminium extrusion or sheet enabling the thermal heat dissipation generated by LED. In Powder coated metal the heat will get trapped. The LED Tj maximum is 85ºC.

SS for body except LED area is advisable due to ease of maintenance and it is not prone to dark spots due to dirty hands and can be cleaned very easily. M/s D.R. Auto Industries There are no clause No. 5.11 and 5.12 mentioned in this specification. (As per letter dated 30.03.2016)With regard to construction of the fixture, we recommended that the fixture of the luminaries shall be single piece in deep drawn process i.e. the bottom piece shall be single piece and top cover shall be single piece, this is a must for longer life of the luminaires and for maintaining IP 65 protection level.

keeping in view the content of RCF letter. Material is to be used as per specification. Material is to be used as per specification. Corrected in the specification. Accepted and mentioned in the specification. Modified clause: Please see Final draft specification

b) Fire retardant polycarbonate diffuser (minimum 2.00mm thick) of sufficient strength shall be provided under the LED chamber to ensure glare free light and to protect the luminaire. Selection of diffuser shall be such that the individual LEDs are not visible and appearance looks like a brightly lighted surface.

R.T. Vision Diffuser 1.5mm with test report of NABL accredited lab for UL94V0 is available the same may permitted to get best illuminance. The Drawings made also contain spacing suitable mostly for the diffuser of 1.5mm.

Accepted, corrected as 1.5mm in place of 2.00 mm

Western Railway Fire retardant poly-carbonate diffuser (minimum 1.5mm thick). In the poly carbonate diffuser of 2.0mm thickness, light transmission will be reduced by 60 – 65%. Polycarbonate sheet diffuser in 1.5 mm thickness grade UL-94-V2 is available, while 2 mm thickness grade UL-94-V2 or V0 is not readily available in the market General Auto Electric Corporation Diffuser should be made of thickness1.5mm UL94V0.. M/s Electronic Equipment Co. Pvt. Ltd., The 1.5 mm UL94V0 thick diffuser is more than sufficient. Northern Railway The thickness of polycarbonate diffuser may be reviewed as thickness inversely effects the illumination.

Accepted, diffuser in 1.5 mm thickness grade with UL-94-V0 as this is readily available in the market. Accepted Accepted. Accepted, it is now 1.5mm thick. Modified clause: Please see Final draft specification

c) All steel items excluding hardware shall be given surface treatment for anti-rust and anti- corrosion before finishing with powder coating. The thickness of powder coating shall not be less than 60 microns to white colour shade no 042 ‘IFB white’ of M/s Berger or equivalent shade of other reputed make with glossy finish from inside and outside.

R.T. Vision All Mild steel items wherever used excluding hardware shall be given surface treatment for anti-rust and anti- corrosion before finishing with powder coating. General Auto Electric Corporation Powder coating to be done only on MS parts. M/s Electronic Equipment Co. Pvt. Ltd., Anti-Rust and powder coating should be limited on Mild Steel parts only

Already mentioned in the specification. Already mentioned in the specification. Already mentioned in the specification.

d) Housing of the driver for the luminaire (if required) shall be made of Aluminum or fire retardant polycarbonate/ fibre sheet.

R.T. Vision The driver shall be IP65 made of fire retardant polycarbonate/ Fibre sheet which gives not only high insulation but also reduces weight of the luminaire. The driver should be standardised to ≥5W voltage output 24V ±5% and <5W 12V±5%, Less than <1W 6V ±5%. This shall make interchangeability possible. A Paul

Accepted. To be mentioned in the

specification

Powder coated Mild Steel of SS may kindly be permitted as well as thermal conductivity does not appear to be an issue as polycarbonate is also permitted. General Auto Electric Corporation Driver in Polycarbonate is best suited due to high insulation properties. M/s Electronic Equipment Co. Pvt. Ltd., Polycarbonate is most suitable for housing of the driver.

Not accepted. Aluminium, Fire retardant Polycarbonate or fibre sheet are permitted Accepted OK Modified clause: Please see Final draft specification

e) Complete LED luminaire shall comply with LM-79 standard. The manufacturer shall submit the test report from the OEM at the time of testing

R.T. Vision Manufacturer shall have to do LM79 testing by themselves since it is test for complete luminaire. A Paul We understand the term OEM here refers to as OEM of LED’s used. M/s Dhingra Engineering Work LM-79 testing is done on luminaire. OEM cannot provide any certificate for the same; Manufacturer will have to undergo LM-79 testing for luminaire. Rail Coach Factory, Kapurthala Complete LED Luminaire shall comply with LM 79 standard. Manufacturer shall submit the report from NABL/Govt. Approved Laboratory instead of OEM. General Auto Electric Corporation LM79 is test of luminaire which can be done by LED OEM. We shall get it tested. D.R. Auto LM-79 testing is generally applicable for outdoor lighting like street lamps, organization like EESL, Municipalities etc. require LM-79 testing as there is no prototype testing done by these organizations. As per RDSO is conducting the

Not accepted. LM79 testing deleted as the same is not required for this product. yes LM79 testing deleted LM79 testing deleted LM79 testing deleted LM79 testing deleted

prototype testing and the luminaires covered under this specification are for indoor application only there is no requirement for LM-79 testing, hence it is requested to kindly delete the requirement for the same.

Modified clause: Please see Final draft specification

f) Minor changes in dimensions can be considered to achieve uniformity levels. Dimensions and uniformity levels achieved shall be submitted by the manufacturer

R.T. Vision Since lights are already with diffuser using extra extrusion diffuser in LHB chair car(annexure 19 and 20) and bathroom lights(annexure 7) would make the product costly for Railways and can be avoided. The LED enclosure should be indicated in aluminium to ensure best thermal management of LEDs as prescribed by the LED manufacturer. The Dimensions and the design in drawings of annexures are tentative they should be finalised after submission of design by at least three companies on the merit of the design. Some luminaires can be made common to reduce number of inventory. Example annexure 4,5,6 can be made common 18Watt/9 watt. Annexure 19 contains two drivers this should be made only one driver. Rail Coach Factory, Kapurthala This para is to be deleted because RCF has made exact drawings for LHB and Non-LHB all luminaires. General Auto Electric Corporation The drawings is tentative therefore variation should be permitted. External diffusser shall result in illumination loss in chair car and IP65 cannot be achieved with this diffuser

Not Accepted. Diffuser is required for retaining the aesthetic of coach. Material is to be used as per specification. Drawings as indicated in Annexure-3 will be followed. OK. As far as possible have been done Modified Para corrected Drawings as indicated in Annexure-3 will be followed. Modified clause: Please see Final draft specification

g) Suitable number of LEDs shall be used in the luminaire. LED of NICHIA/OSRAM/SAMSUNG/LUMILEDS/CREE/AVAGO make shall be used for the purpose. The

R.T. Vision OK, Number of makes should be reduced to maintain uniformity across the Railways.

Not accepted as minimum sources have been mentioned.

manufacturer shall submit the proof of procurement of LEDs from above OEMs at the time of testing.

A Paul Kindly add “Seoul Semi” as an approved make. Berth Reading Light is a “driver less” light and only Seoul Semi’s LEDs are feasible for use in it. There is no space in BRL for fitment of a driver, requiring use of high voltage LED modules for use directly on 110V DC. Seoul Semi is already approved at RCF and also in all LED based applications in RDSO. Their low voltage discrete LEDs meet all technical requirements of the draft specification. However, for High Voltage AC/DC LED modules used in RBL, 150 lm/Watt efficiency cannot be met. This is very pertinent rectification needed keeping requirements of the BRL. A reference may kindly be made to the drawings of BRL which by virtue of the drawings are “Driverless”. May we also request EVERLITE to be an approved make. Everlite is the 9

th largest manufacturer of LEDs in the world

with several patents to their credit and is a leading make. Everlite is approved for use in light fittings at MNRE. Their LEDs meet all technical requirements of the draft specification. Kindly add “any other make with the prior approval of RDSO. Rail Coach Factory, Kapurthala SEOUL make LED may also be included in the specified makes of LED. M/s Fortune Arrt LED Lighting Pvt. Ltd., Please add Everlight / Edison also.

Sufficient sources have already been incorporated. Sufficient sources have already been incorporated. Sufficient sources have already been incorporated.

h) Suitable reflector may also be provided to increase the illumination angle.

Rail Coach Factory, Kapurthala The utility of using suitable reflector may be examined. For LED luminaire, the reflector may not be required.

OK. Para deleted

j) Suitable WAGO/Phoenix make Connector shall be used between Driver and LED array (cage-clamp type) and between driver to input.

R.T. Vision Suitable WAGO/Phoenix or similar Connector

Not accepted. As similar word has no authenticity

l) The weight of the luminaire shall not be more than 1.5Kg except for the luminaire for LHB/Chair car coaches, for which the weight shall be as minimum as feasible.

Rail Coach Factory, Kapurthala The weight of some of the fittings may be more than 1.5 kg. RDSO may kindly examine the need to specify the maximum limit of the weight of the luminaires.

Agreed, weight deleted. Sentence corrected

Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore In order to reduce weight of fittings, use of industrial plastics be considered instead of metal for the fixtures as the wattages are quite low. Modern Coach Factory, Raebareli Weight of the energy efficient LED based luminaires should not be more than existing fittings.

Not accepted in view of life of the luminaire. Modified clause: Please see Final draft specification

m) Total harmonic distortion (THD) shall be less than 5% at full load.

R.T. Vision THD shall be <10% in specified operating voltage range and shall be <5% at 110V. Western Railway Total harmonic distortion (THD) shall be less than 5% at full load at nominal voltage of 110 V DC/AC THD will depend upon input range & wattage. Therefore one table has to be made for different wattage. M/s Dhingra Engineering Work THD shall be less than 10% General Auto Electric Corporation THD to be made 10% and power factor to be made 0.90. Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore

a) Above clause stipulates THD to be less than 5%. For

LED wattage of 24 watts and below THD measurement

is not mandatory. Wattage of fittings covered by the

specification being limited to 18 watts, this clause is not

necessary as it will only increase the cost without

justification.

b) Bulk of the railway coaches use 110V DC supply. Since

input supply is DC question of THD does not arise.

THD is not relevant to DC Systems.

Values of Total harmonic distortion (THD) have been corrected. Values of Total harmonic distortion (THD) have been corrected. Values of Total harmonic distortion (THD) have been corrected. Values of Total harmonic distortion (THD) and power factor have been modified. Values of Total harmonic distortion (THD) have been corrected.

c) Presently there are no devices for LED driver which

can give THD less than 12-15%. Therefore in case 5%

THD is required active power factor correction has to

be utilised, which will be double the cost of LED Driver.

d) It is recommended to have separate driver for DC input

supply and for AC/DC input supply. This will result in

saving for railways as bulk of the coaches are with DC

supply.

e) None of the specification for LED drivers specify limit

for total harmonic distortion.

It is therefore recommended that this clause be

deleted.

M/s Electronic Equipment Co. Pvt. Ltd., Total Harmonic Distortion up to 10% shall be permitted.5% THD can also be achieved but the driver cost goes up drastically. M/s Fortune Arrt LED Lighting Pvt. Ltd., The THD may be made <10%. Northern Railway THD is specified as less than 5% at full load. The test to be conducted to verify this may be incorporated. However, it is suggested that this value may be reviewed and kept as less than 20%.

Values of Total harmonic distortion (THD) have been corrected. Values of Total harmonic distortion (THD) have been corrected. Values of Total harmonic distortion (THD) have been corrected. Modified clause: Please see Final draft specification

n) The power factor of the luminaire shall be more than 0.95.

R.T. Vision OK for lights >3watt. Below 3watt it shall be >0 .90 Western Railway The power factor of the luminaire shall be more than 0.95 at nominal voltage of 110 V DC/AC. Power factor will depend upon input range & wattage. Therefore one table has to be made for different wattage General Auto Electric Corporation

Accepted. Values of power factor have been corrected. Measurement shall be done at nominal voltage i.e.110V AC/DC.

THD to be made 10% and power factor to be made 0.90. M/s Electronic Equipment Co. Pvt. Ltd., Power Factor 0.90 should be permitted.

Values of Total harmonic distortion (THD) and power factor have been modified Power factor corrected. Modified clause: Please see Final draft specification

5.1 a)

The efficiency of the LED lamps at 1150C junction

temperature shall be more than 85%. R.T. Vision LED efficiency is as per lumen per watt and cannot be as termed in percentage.(as advised by the LED manufacturer). Western Railway The LED lamp used shall not exceed the rated junction temperature defined by the manufacturer under typical forward current. Efficiency of the LED shall not be less than 85% under rated max junction temp. and operating current. Junction temperature specified for 115

oC should be 90

oC

because the latest available fractional wattage power LEDs have lesser junction temp. D.R. Auto LEDs efficacy always in term of Lm/Watt. It can’t be in term of %. M/s Dhingra Engineering Work LEDs efficacy is always calculated in term of Lm/Watt, It cannot be in term of %. (As advised by LED manufacturer.) General Auto Electric Corporation Wherever 115 degree has been used it should be change to 105 degree as specified by LED manufacturer.Standard color temperature as per ANSI and LED manufacturer is 6000-7000K. The Tj for better life has to be less than 85ºC. the white point stability should be 5 step. The driving current should be 80% of maximum forward current subject to maximum temperature specified. MIC Electronics Limited, Hyderabad LEDs efficacy always in term of Lm/Watt. It can’t be in

Junction Temp. corrected as 85°C In place of 115°C Accepted for Junction temperature as 85

oC

Agreed, it is corrected as 150lumen/watt in place of 85%. Agreed, it is corrected as 150lumen/watt in place of 85%. Accepted and corrected in the specification. Agreed, it is corrected as 150

terms of %. lumen/watt in place of 85%. Modified clause: Please see Final draft specification

b) The working life of the lamp at junction temperature of 115

0C for 350mA/ 175mA/80mA/ 65mA current shall

not be less than 50000 hours of accumulative operation and shall be suitable for continuous operation of 24 hours per day. These features shall be supported by datasheet.

R.T. Vision OK The working life of the lamp at junction temperature of 105°C. Western Railway The working life of the lamp at rated junction temperature for 350mA /175mA /80mA /65mA /40mA current shall not be less than 50000 hrs of accumulative operation and shall be suitable for continuous operation of 24 hrs per day. These features shall be supported by datasheet and LM-80 D.R. Auto Life report available up to max 105°C Ts. Condition should be 105°C Ts maximum. Given current will create a limitation on production design for wattage & uniformity. Similar and a right condition already given at clause no 5.1 i. MIC Electronics Limited, Hyderabad Life report available upto max. 105°C Ts. Condition should be 105°C Ts is maximum. Given current will create a limitation on production design for wattage & uniformity. Similar and a right condition already given at Clause No. 5.1 (i).

Accepted for Tj 85°C and corrected Accepted corrected Tj as 85°C corrected Tj as 85°C Modified clause: Please see Final draft specification

c) Colour temperature of the white colour LED used in the luminaire shall be in the range of 5700k-6500k for cool day white.

R.T. Vision The LED manufacturer has prescribed 6000 to 7000 range as per ANSI. Best suited is also 6000-7000 range as already earlier in specification version. D.R. Auto There is no any standard for min 5700 to max 6500K. We need to consider 5700K & 6500K color for the same range shall be as per ANSI Standard or SDCM < 5. M/s Dhingra Engineering Work

Accepted range of 6000 K to 7000 K as per old specification and corrected Accepted range of 6000 K to 7000 K as per old specification and corrected

There is no any standard for min 5700 to max 6500K. We need to consider 5700K & 6500K colour for the same range shall be as per ANSI Standard or SDCM < 5. (As advised by LED manufacturer.) M/s Electronic Equipment Co. Pvt. Ltd., Color Temperature as specified by the manufacturer is 6000- 7000K or 5000 to 6000K. one range should be selected. MIC Electronics Limited, Hyderabad There is no any standard for min 5700 to max. 6500K. We need to consider 5700K & 6500K color for the same range shall be as per ANSI Standard or SDCM<5.

Accepted range of 6000 K to 7000 K as per old specification and corrected Accepted range of 6000 K to 7000 K as per old specification and corrected Accepted range of 6000k to 7000k as per old specification and corrected Modified clause: Please see Final draft specification

d) The output of LED (efficacy) shall not be less than 150 lumen per watt at minimal operating current and shall ensure guaranteed operation life of not less than 50000 burning hours with controlled junction temperature of >115

0C.

R.T. Vision OK >50000 burning hours with at per Tj 90ºC or Ts 105 ºC Western Railway The output of LED (efficacy) shall not be less than 135 lumen per watt at minimal operating current and shall ensure guaranteed operation life of not less than 50,000 burning hours with controlled junction temperature of 90

oC.

Minimum 6 nos of LEDs to be used per watt. D.R. Auto Available data at Tj-90°C or Ts- 105°C. Integral Coach Factory, Chennai Availability of LEDs which can deliver output of 150 lumen per watt may be examined. This may not be easily available for small power LEDs. A Paul At minimal operating current should be read as “Typical Operating current. Kindly confirm. A clause may kindly be inserted that LED shall not be driven beyond their typical rated current to avoid over driving of LEDs by any

Accepted Tj 85°C in place of 115 ºC. Efficacy of 150 lumen / watt is desired. . Corrected. LED having output of 150 lumen/watt are widely available in the market for the mentioned make. 150 lumen/watt shall be at minimal operating current.

manufacturers. M/s Dhingra Engineering Work Data is available at Tj-90°C or Ts- 105°C. (as advised by LED manufacturer.) MIC Electronics Limited, Hyderabad Available data at Tj-90°C or Ts-105°C Northern Railway It should be “The output of LED lumens shall be more than 120 Lumens/Watt at minimal operating currents”. In addition to above, and from the fact that LED technology is fast growing technology and hence revision of Paras like Para 5.1 (d) may require modifications in future. Such aspects should be reviewed annually.

It is now corrected as 85°C. It is now corrected as 85°C It is 150 Lumens/Watt Agreed, all the railways should review annually Modified clause: Please see Final draft specification

e) LED controller (Driver) shall be EMI/EMC compliant.

A Paul EMI/EMC standards to comply may kindly be specified as those referred under test clause of the specification.

Exists in Para 8.0 (xix) of the specification

f) The LEDs used shall have white point stability less than 7 step (Macadam ellipse) or as per LM80. The manufacturer shall submit the compliance from OEM.

R.T. Vision 5 step is prescribed by the LED manufacturer. M/s Dhingra Engineering Work The LEDs used shall have white point stability less than 5 step (Macadam Ellipse) or as per LM80. 5 step is better than 7 step. (as advised by LED manufacturer.). M/s Electronic Equipment Co. Pvt. Ltd., White point stability up to 5 steps may be permitted.

Accepted as 5 steps are better than 7 steps. Corrected Accepted as 5 steps are better than 7 steps. Corrected Accepted as 5 steps are better than 7 steps. Corrected Modified clause: Please see Final draft specification

h) The LEDs used shall be UL certified with UL number. M/s Fortune Arrt LED Lighting Pvt. Ltd., The LEDs shall be certified from any NVLAP approved laboratory.

Not agreed.

i) The LED driving current shall not be more than 80% of the specified current

R.T. Vision The specified current should be change to maximum forward current.

Agreed ,it shall be corrected as 80% of absolute maximum forward current

Western Railway The LED should not be driven at more than rated current. (Revision required) D.R. Auto 80% of absolute maximum forward currents. MIC Electronics Limited, Hyderabad 80% of absolute maximum forward currents.

Agreed ,it shall be corrected as 80% of absolute maximum forward current Agreed ,it shall be corrected as 80% of absolute maximum forward current Agreed ,it shall be corrected as 80% of absolute maximum forward current Modified clause: Please see Final draft specification

k) New Clause D.R. Auto Additional condition Heat sink design shall be in such a way that Tj of any leds shall be less than 90°C. MIC Electronics Limited, Hyderabad Heat sink design shall be in such a way that Tj of any LEDs shall be less than 90°C.

Not accepted, as already mentioned in the specification. Not accepted, as already mentioned in the specification

6.2 The electronic components used shall be as follows:-

6.2 b)

Metallic film / Paper/Polyester Capacitor shall be rated for 105ºC or above

General Auto Electric Corporation All Electrolytic capacitors shall be of 8000 hours. R.T. Vision Metallic film / Paper/Polyester Capacitor shall be rated for 105ºC or above.All Electrolytic capacitors shall be of 8000 hours.

Not accepted as Electrolytic capacitors not considered to be used.

d) The resistors shall be preferably made of metal film of adequate rating. The actual loading versus rating shall be 3.

Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore mentions that the resistors used should be of metal film of adequate rating. This is not possible as technology has moved on to SMT wherein we use chip resistors which are placed on the PCB using pick and place machines. Hence this clause needs to be amended suitably.

Agreed ,Use of chip resistor also included as optional in the specification. Modified clause: Please see Final draft specification

g) The protective cum adhesive coating used on PCBs shall be clear and transparent and shall not affect color

R.T. Vision The conformal coating shall be UV visible to confirm 100%

Already mentioned in the specification.

code of electronic components or the product code of the company.

coverage of conformal coating on electronics as a improved quality measure.

6.3 Low smoke, halogen free, fire retardant thin walled flexible e-beam cable with multi-strand copper conductors suitable for continuous operation at 120ºC shall be used inside the luminaire as connecting wires and fuse protection shall be provided at input side.

R.T. Vision In case fuse holder used it shall be from reputed UL/UR/CSA/CE approved manufacturers. The body of the fuse holder shall be UL-94 V-0 Thermoplastic. PTFE cable conforming to JSS standard may also be permitted along with Ebeam cable. Integral Coach Factory, Chennai E-beam cable has been prescribed under this clause. Most of the suppliers always expressed their inability to procure e-beam cables from RDSO approved sources in view of low quantity requirement. Further use of e-beam cable between driver and LEDs may be difficult in using terminal blocks/soldering. Since power consumption is very less, it is suggested that PFTE cable of suitable size confirming to JSS standards may be permitted to use as an alternative to the use of e-beam cable. General Auto Electric Corporation The fuse holder shall be UL-94 V-0 and ebeam cable is diffcult to procure therefore PTFE cable conforming to JSS standard to be allowed. Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore

E-beam cable is not suitable for soldering on MCPCB

which are sometimes used for higher wattage fixtures.

Since the cable are not flexible, they will pull out the pcb

layer easily which will lead to nuisance failures. The

number of manufacturers of this cable is limited and these

cables are only available in bulk quantity. It is therefore

recommended that as per world wide practice, Teflon wires

which can withstand 120°C may be permitted in lieu of e-

beam cable.

Agreed and PTFE cable added as optional. Agreed and PTFE cable added as optional Agreed and PTFE cable added as optional PTFE cable added as optional

M/s Electronic Equipment Co. Pvt. Ltd., Ebeam sourcing is problematic therefore use of PTFE cable may be added.

Agreed and PTFE cable added as optional Modified clause: Please see Final draft specification

6.4 Adequate heat sink with proper thermal management shall be provided. Design should not consider heat dissipation through roof top as roof is provided with heat insulation material.

R.T. Vision OK. The LED enclosure should be capable to disspating heat in all directions since heat cannot be dissipated through top mounted heat sink. M/s Dhingra Engineering Work Adequate heat sink with proper thermal management shall be provided. Design should be such that LED Tj shall be less than 90°C. General Auto Electric Corporation Natural heat dissipation using the enclosure of LED by making it of aluminium is the only way. Heat sink with fins can be used in side mounting. M/s Electronic Equipment Co. Pvt. Ltd., Aluminium based construction of body is the best way of heat dissipation and will remove heat accumulation in the housing. All LED manufacturers advise aluminium heat sinking or Aluminium housing to maintain thermal properties of LEDs.

Already mentioned in the specification. Accepted. Mentioned in the specification. Material to be used as per specification. Material to be used as per specification.

6.5 Care shall be taken in the design that there is no water stagnation anywhere. The entire housing shall be dust proof and water spray having IP-65 protection as per IEC 60529.

R.T. Vision The Luminaire and driver housing shall be dust proof and water spray having IP-65 protection as per IEC 60529. Western Railway IP-54 for luminaire IP-65 for Driver As the complete fitting is fabricated so maintaining dimensional uniformity throughout will be difficult task. So IP-65 for complete luminaire will not be practically feasible in long run. Integral Coach Factory, Chennai Comments furnished against Point No.3 (Clause 1.2 (ii))

Already mentioned in Specification. Not accepted as IP 65 is possible at comparable cost w.r.t IP-54. IP-65 for Driver is accepted IP-65 protection will be appropriate

may be referred. General Auto Electric Corporation IP-65 protection as per IEC 60529 should be for both luminaire and driver. M/s Electronic Equipment Co. Pvt. Ltd., Luminaire driver both should be IP-65.

Accepted Accepted Modified clause: Please see Final draft specification

6.8 The control gear shall be designed in such a way so that temperature of heat sink shall not be more than 45

0C for air-conditioned coaches and 10ºC above the

ambient for non-air-conditioned coaches.

R.T. Vision OK. The Body of the LED enclosure should be made of Aluminium to ensure that the Tj of LEDs remain less than 85ºC. This is also prescribed by the LED manufacturer.

Luminaire Shall be designed as per clause

6.9 Diffusers used shall be such that the glare from individual LED is restricted and shall appear as a single source of light as in the case for lighted globe and it shall not cause inconvenience to the passengers.

R.T. Vision OK except in retrofitment where existing diffusers are already provided. Where transparent covers have been provided diffuser shall be used. North Western Railway Existing light fittings having transparent acrylic diffuser. Diffuser with LED fitting may also clarified.

Not agreed as this Clause is for new luminaire. Diffuser is not required in case of retro fitment.

6.11 All the material used in the luminaire shall be halogen free and fire retardant conforming to UL94-V0.

R.T. Vision OK all materials shall be UL94V0 and the PCB shall be FR4 grade. Western Railway The material used in the luminaire shall be halogen free and fire retardant confirming to UL94-V0, except diffuser, which shall confirm to UL-94-V2 As diffuser of 2 mm or 1.5 mm thickness, confirming to UL-94 V0 is not readily available and suppliers are very limited like Bayer etc. They shall supply in bulk quantity only. M/s Dhingra Engineering Work Should be applicable on diffuser only Rail Coach Factory, Kapurthala All the material used for luminaire may not conform to

Already mentioned in the specification Not accepted as UL94-V0, 1.5mm diffusers are available. Not accepted. Fire retardant conformal coating is

UL94V0 like PCB and its component etc. Thus the requirement of UL94V0 may be limited to diffuser, cables, insulating materials. General Auto Electric Corporation PCB shall be FR4 and other items shall be UL94V0. Wire shall be PTFE. Northern Railway It should be UL94-V0 for complete luminaire except UL94-V2 for the diffusers as diffuser with UL95-V0 are not readily available.

provided as per Clause No. 6.2 (g) Already mentioned in the specification Not accepted as1.5mm diffuser with UL94-V0 are readily available.

6.12 Illumination Level: The fitting shall be so designed that the illumination level shall be evenly distributed and shall be free from glare. Illumination level of different types of luminaire shall be as below:

Sl. No. Type of Luminaire

Vertical Distance (Mtrs) from the floor level

Average Illumination Level ( Lux)

Colour of illumination

1. Type –A 0.84 120 Cool day white

2. Type –B 0.84 80 Cool day white

3. Type –C 0.84 80 Warm white

4. Type –D 0.50 100 Cool day white

5. Type –E 10.0* Clearvisible

Blue

6. Type –F1/F2

0.75 100 Cool day white

R.T. Vision OK, Type G should be made cool day white. And type H should be made Green Vacan and Red occupied. Western Railway Minimum illumination level (Lux) Note 3 & 4 to be deleted and following para should be added.

Illumination level should be confirming to UIC-555 wherever applicable.

The efficacy of luminaire which includes electronic, optical, thermal components should not be less than 55% of the rated LED lumens per watt for given mechanical structure. Details of EMU & MEMU application to be incorporated in the table by RDSO D.R. Auto Note – 4 LM-80 is for lumen & color maintenance of LEDs. Integral Coach Factory, Chennai (S.No. 9) Type I: Colour of illumination is mentioned as RED, which may be modified to cool day white. No passenger alarm indication lamps with RED colour are used by ICF. A Paul

Accepted and corrected Not accepted as illumination level is already defined in the specification. Incorporated. Noted. The colour shall be Red Not accepted.

7. Type –G 10.0* Clearvisible

Green - Vacant Red – Occupied

8. Type –H 10.0* Clearvisible

Cool day white

9. Type –I 400* Clear visible

Red

10. Type –J 0.84 80 Cool day white

11. Type –K 0.84 80 Cool day white

12. Type –L 0.84 120 Cool day white

13. Type –M 0.84 80 Cool day white

14. Type –N 0.84 80 Cool day white

15. Type –O 0.84 120 Cool day white

16. Type –P - - -

17. Type –Q1/Q2

1.20 100 Cool day white

* Horizontal distances Note: 1.Variation in illumination level shall be ±2% for

input voltage range from 90VDC to 140VDC. 2. The illumination shall not have infra-red and

ultra-violet emission. The test certificate from the NABL approved laboratory shall be submitted.

3. Calibration of illumination level facility shall be provided inside the luminaire.

4. Electronic efficiency shall be in accordance with LM80-8.

Removing infrared emission form an LED source is impossible, Kindly define limits or word infrared should be deleted. M/s Dhingra Engineering Work The type of luminaire and colour of illumination does not match i.e. Type G and Type H. Rail Coach Factory, Kapurthala The colour of illumination mentioned in the table under Sr. No. 7 & 8 for type G and type H fitting should be interchanged. General Auto Electric Corporation Type G to be made cool day white. And type H should be made Green Vacant / Red occupied. Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore Note 3

This needs clarification as illumination level can be

measured and recorded. Calibration requires comparison

with a standard. It is only possible to record illumination

level satisfactory / unsatisfactory on each luminaire.

M/s Fortune Arrt LED Lighting Pvt. Ltd., Note 4 – Electronic Efficiency shall be >85%. MIC Electronics Limited, Hyderabad Note 4 – LM 80 is for lumen & colour maintenance of LEDs. Northern Railway The average illumination shall be minimum illumination level Note 3 shall be reviewed.

Infra-Red emission removing is possible. Accepted and corrected. Accepted and corrected. Accepted and corrected. OK, note deleted Note-4 deleted Note-4 deleted Note 3 deleted. Modified clause: Please see Final draft specification

6.13 After 50,000 burning hours, the luminaire intensity shall be at least 90% with degree of uniformity of at least 1:1.3 as per UIC 555. Data sheet showing year wise deterioration in the LED shall also be submitted along

R.T. Vision OK. The uniformity clause shall not be applicable on indication lights and other lights of 3 watt and less.

It shall be as per clause.

with design. Western Railway To be omitted Because LM-80 already defines levels of lumens degradation after life of 50000 hours Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore This data for LEDs is under the purview of the LED

manufacturer and should be available with them. However

these are only theoretical values or accelerated life cycle

figures and not the real values. Hence they will not be too

useful to determine the life of the end product.

luminaire intensity shall be at least 70% Certificate from LED manufacturer shall be submitted. Certificate from LED manufacturers shall be submitted. Modified clause: Please see Final draft specification

7.2 Type Test Type tests shall be carried out to prove confirmation with the requirement of specification and general quality/design features of the unit. The results of the type tests shall be valid for a maximum period of 3 years. In case of any change in Bill of Material or design of unit, complete type test shall be repeated. If any sample fails in any of the type tests, two fresh samples shall be taken and tested. If any sample again fails in that test, the whole lot shall be rejected.

R.T. Vision OK. Any improvement based on field input shall be permitted to ensure design improvement as continuous process. In this case re type test may be exempted.

Not accepted. In case of design change, type tests shall be done as per ISO procedure.

7.5 Test Scheme:

S N

Description of test

Clause no.

Prototype Test

Type Test

Acceptance Test

Routine Test

1 Visual and Dimensional check

8 (i) Y Y Y Y

2 Checking of documents of

8 (ii) Y Y Y Y

Western Railway (Item No. 12 of test scheme) To be deleted from routine test. Lux measurement may be omitted from routine test as it is not possible to measure lux for each fitting as this type of test is done in dark room. Rail Coach Factory, Kapurthala Nowhere test for actual wattage consumed by the luminaire has been prescribed. Therefore, it is necessary to measure wattage of the fittings in the prototype/type test.

Following may also be suitably added in the Test Scheme :

Accepted. Clause added in test scheme Wattage measurement- Added in Clause 8.0 (vii). Other suggestions incorporated suitably in various clauses.

purchase of LED

3 Resistance to humidity

8 (iii) Y Y - -

4 Insulation resistance test

8 (iv) Y Y Y Y

5 HV test 8 (v) Y Y Y Y

6 Over voltage protection

8 (vi) Y Y Y Y

7 Short circuit protection

8 (vii)

Y Y - -

8 Surge protection

8 (viii)

Y Y - -

9 Reverse polarity

8 (ix) Y Y Y Y

10

Temperature rise Test

8 (x) Y Y - -

11

Ra (Colour Rendering Index) measurement test

8 (xi) Y Y - -

12

Lux measurement

8 (xii)

Y Y Y Y

13

Fire retardant Test

8 (xiii)

Y Y

14

Test for IP65 protection

8 (xiv)

Y Y - -

15

Vibration and Shock test

8 (xv)

Y - - -

16

Environmental tests

8 (xvi)

Y - - -

17

Life test 8 (xvii)

Y - - -

18

EMI/EMC Test

8 (xviii)

Y - - -

1 Endurance 8 Y Y - -

SN Description of Test Proto

type

test

Ty

pe

test

Acce

ptanc

e test

Rou

tine

test

Checking of

documents for –

(i) LM79 compliance

of luminaire.

(ii) LM80

compliance of LED.

(iii) Prototype

approval.

(iv) Manufacturer

Name Marking on

the PCB panel,

driver chip and

housing

(v) Material of

housing as per

clause 5 of the

specification.

(vi) Power

Consumed by

Luminiary.

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

-

Y

Y

Y

Y

Y

-

9 Test (xix)

20

Safety 8 (xx)

Y - - -

Modified clause: Please see Final draft specification

8.0 (i)

Visual & Dimensional Check The unit shall be checked visually for all dimensions as per approved design and drawing. General workmanship should be good; all the components properly secured and sharp edges shall be rounded off. Check he marking and quality of the workmanship visually. Check the rating and make of electronic / electrical items.

Rail Coach Factory, Raebareli The fittings of Energy efficient LED based luminaries should be “crash worthy” and there are no sharp edges.

Already indicated in the specification

(ii) Checking of Purchase documents of LED Document of purchase of LED lamps from the approved sources viz. NICHIA/OSRAM/SAMSUNG/ LUMILEDS/CREE/AVAGO along with validation of driver controller card and luminaire by the manufacturer of the LEDs to ascertain the life of the LEDs shall be checked.

R.T. Vision OK, Samsung is normally known for commercial LEDs and not for industrial LEDs therefore giving 5years warranty with Samsung LEDs may be difficult. A Paul Kindly add any other make with the prior approval of RDSO. Rail Coach Factory, Kapurthala The Last line is required to be deleted w.r.t. validation of the driver controller card and luminary by manufacturer of LEDs.

Not accepted. Sufficient sources have already been provided. It is required to ensure the reliability of the product. Modified clause: Please see Final draft specification

(iv) Insulation resistance test The insulation resistance of the unit between earth and current carrying parts shorted together shall not be less

than 2 M when measured with 500V megger before and after HV test.

R.T. Vision The Insulation resistance shall be made ≥100 mega ohm to plug any insulation gaps since these lights have to work for >5 years. Integral Coach Factory, Chennai IR value is mentioned as not less than 2 meg ohms. It is suggested that the IR value may be kept minimum as 10/20 meg ohms as more number of LED fittings are used in the coach are connected in parallel which may droop the IR value of the coach. General Auto Electric Corporation IT should be more than 100 Mohm

Accepted, IR value shall not be less than 100 MΏ at 60% RH. Accepted, IR value shall not be less than 100 MΏ at 60% RH. Accepted, IR value shall not be less

than 100 MΏ at 60% RH. Modified clause: Please see Final draft specification

(viii) Surge protection

It shall withstand a surge of 3kV 3% for 50

microseconds 20 % at the input terminals for all types of luminaire.

Western Railway can be 5kv M/s Dhingra Engineering Work The surge of 3kV is not required, in our opinion surge of 1.72kV is acceptable.

The luminaires shall withstand a surge

of 3kV 5% as per procedure given in IEC 60571 The luminaires shall withstand a surge

of 3kV 5% as per procedure given in IEC 60571 Modified clause: Please see Final draft specification

(xi) Ra (Colour Rendering Index) measurement test The lumen is the unit of luminous flux, which is equal to the flux emitted in a solid angle of one Steradian by a uniform point source of one candela.

The initial reading of the chromaticity co-ordinates x & y shall be within 5 SDCM (Standards Deviation for Colour matching) from the standardised rated value as per Annex. D of IEC 60081.

The initial reading of the general colour-rendering index (Ra) shall not be less than the rated value decreased by 3. Certificate based on relevant standards to this measurement shall be obtained from the OEM.

R.T. Vision OK CRI shall be minimum 80% as declared by LED manufacturer. Western Railway The initial reading of the general color-rendering (Ra) shall be > or = 75 D.R. Auto Initial value shall be greater than 80. M/s Dhingra Engineering Work Initial CRI not defined, Initial value shall be greater than 80. (as advised by LED manufacturer.) MIC Electronics Limited, Hyderabad Initial value shall be greater than 80.

‘CRI shall be minimum 80’.added in the clause ‘CRI shall be minimum 80’.added in the clause Accepted Accepted Accepted Modified clause: Please see Final draft specification

(xiii) Fire retardant Test Fire Retardant test shall be conducted as per UL-94 V0 for the insulating material used in the luminaire.

R.T. Vision OK UL94V0 test also to be done on diffuser and body paint also. Western Railway Fire retardant test shall be conducted as per UL-94 V0 for the insulating material used in the luminaire except Diffuser & for Diffuser the test shall be as per UL-94 V2 As diffuser of 2 mm or 1.5 mm thickness as per UL-94-V0 is not readily available in the market

OK. Already mentioned in the specification. UL94-V0 is essential.

M/s Dhingra Engineering Work In our opinion fire retardant test shall be restricted to diffuser.

UL94-V0 is essential.

(xv) Vibration and Shock Test The complete unit cubicle together with its mounting arrangements (including shock-absorbing devices, if provided) shall be subjected to the vibration and shock testing (for category B2) as per latest IEC 61373.

Western Railway Shock testing category 1 class A There is no category B2 in IEC 61373. Correct category may be specified. Rail Coach Factory, Kapurthala Vibration and shock testing as per IEC 61373 shall be for category B1 instead of category B2.

Accepted , Added in the clause Not accepted as it shall be category 1 class A Modified clause: Please see Final draft specification

(xvi) Environmental tests (On PCB Driver cards) The Luminaire shall meet the following tests as

prescribed in IEC – 60571: a) Dry heat test. b) Damp heat test c) Test in corrosive atmosphere d) Combined dust, humidity and heat test e) Burn-in test as per RDSO specification no.

ELRS/SPEC/S1/0015-OCT, 2001 (Rev.0) for 45 hours

R.T. Vision It should be done for all Luminaires and not only driver. e) Burn-in test as per RDSO specification no. ELRS/SPEC/S1/0015-OCT, 2001 (Rev.0) for 45 hours. In Routine Test 100% luminiare shall be kept ON for 48 hours at 50ºC±5ºC, Electrcial parameter before and after test shall be recorded and should be in range before and after burn in test. All parameters should remain in the acceptable limits. In acceptance test 5 Luminiare shall be kept ON for 2 hours at 50ºC±5ºC and -10ºC±3º. No luminiare should fail in this test Western Railway Test d) To be deleted This test facility is not available at ERTL (W) Test in corrosive atmosphere, combined dust, humidity and heat test are not specified in latest IEC 60571. RDSO may incorporate IEC No. containing these test details. M/s Dhingra Engineering Work The environmental tests needs to be done on the complete luminaire, not only on PCB driver cards. Rail Coach Factory, Kapurthala

Already mentioned in the specification Accepted, added in the clause Accepted, added in the clause Accepted Specification has been modified accordingly. Accepted. Burn-in test shall be done on card only.

Environment test shall be conducted on complete luminaire instead of on PCB driver cards. RDSO may kindly examine.

Accepted. Burn-in test shall be done on card only. Modified clause: Please see Final draft specification

xvii) Life Test

The lumen maintenance & life test shall be as per LM80/IS 16105 and TM-21 respectively.

The lumen maintenance of the lamp shall not be less than 90% of the initial lumens after 6000 burning hours at condition of case temperature (or solder point temperature) of 105

0C and ensure

testing is done at minimum 80% of its absolute maximum forward current (if). The initial lumens will be taken after 100 hours aging. Certificate from OEM of LED manufacturer shall be submitted.

Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore

As railways are according approval for LEDs, railways can

demand compliance by the LED manufacturer for the

above clauses and any other compliance requirements

such as clause 11(b) and 11(c). The buyer of the LED has

no hold on LED manufacturer once Railways have

approved the LED and are specifying the sources.

Not accepted as this is to be ascertained by LED manufacturers through luminaire manufacturers.

(xix) Endurance Test The Luminaire shall be kept “ON” with input voltage of 140VDC for 200 hours. After this the Luminaire is subjected to 20,000 cycles of “ON” and “OFF”, each cycle consisting of 3 seconds “ON” and 10 seconds “OFF” period. Luminaire should survive this test. Test is to be continued for one lakh cycles, followed by performance test.

A Paul Operation at 85V DC is more stressful for the driver as at 85V DV, then input current is higher yielding a higher power dissipation (W-12R). Stress test should be done at lowest voltage by that logic. Rail Coach Factory, Kapurthala There appears to be some ambiguity in the endurance test. Luminaire is subjected to 20,000 cycles ON & OFF and this test is to be continued for 1,00,000 cycles. The testing for 20,000 cycles and 1,00,000 cycles need to be examined and clarified. Western Railway It is not clear whether luminaire shall be subjected to 20000 cycles of 1 lakh cycles of ON OFF test.

Accepted but for 90V i.e lowest voltage in the range. Last line to be corrected as- Then the test is continued further up to 100000 cycles, followed by performance test. Same has been clarified in the specification.

9.0 MARKING: Rail Coach Factory, Kapurthala There are three components in the manufacturing of LED fittings : i. Housing ii. Driver

Accepted and corrected.

iii. LED Panel

Each must have a marking of the name of the manufacturer, batch number and year of manufacturing so that Railways are able ascertain the life. Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore

This clause should specify marking for LED Driver and

LEDs because while LEDs are supposed to have a life of

over 50000 hours, electronic components have much

lesser life. So, guarantee / warranty will be different for LED

and electronics which should be taken into consideration

for practical reasons

Not accepted. Guarantee shall be 5 years for complete luminaire i.e. LED and electronics both.

9.1 The following information shall be distinctly and indelibly marked on the housing: a) Indian Railways Insignia b) Year of manufacture/Batch Number/ Serial

Number (MMYY/XX/ABCD) c) Name of Manufacturer d) Rated watt and voltage (Input) e) Rated watt- Output

Rail Coach Factory, Kapurthala f) Schematic diagram printed on aluminum plate shall be riveted on the backside of the fitting as indicated in the respective drawing. North Western Railway. The provision of marking on retro-fitment LED lamp & driver may be included so that their warranty period can be ascertained.

Incorporated in the drawings. Accepted and added in the clause Modified clause: Please see Final draft specification

11.0 ELIGIBILITY CRITERIA a. The manufacturer shall have minimum three years

experience in design, manufacturing, installation and commissioning of different type of LED based luminaire.

b. The manufacturer should have technical collaboration / MoU with the LED manufacturer for supply of high power LEDs and know-how for adequate thermal management to ensure minimum guaranteed performance as given in the specification, the selection procedure for selecting right type of LEDs for such application.

c. The MoU should also indicate the Quality Assurance Plan (QAP) for handling, storage and

R.T. Vision OK, Firms already approved by RDSO in vendor list should be directly included in the vendor list. The manufacturer should have technical collaboration / MoU/ letter from the LED manufacturer Western Railway The manufacturer shall have all the requisite infrastructure and testing facilities as per clause no 14.0 & 15.0 respectively for the tests mentioned above at their works. However, special tests such as IP protection, environmental, surge, vibration and shock tests etc. may be carried out in any NABL approved labs and test results shall be submitted to production units/railways.

Vendor approving authority shall follow their procedure Already exists in the specification

life cycle test of the LED proposed to be used. d. The manufacturer shall have all the requisite

testing facilities for the tests mentioned above at their works. However, special tests such as IP protection , environmental, surge, vibration and shock tests etc. may be carried out in any NABL approved labs and test results shall be submitted to Production Units.

A Paul (a) Insisting on installation and commissioning for a manufacturer would limit number of manufacturers significantly while installation and commissioning is a simple act of electrical wiring. Installation and commissioning of any LED based product in coaches may otherwise be specified as eligibility criteria. Railway Environment is rigorous and a prior experience in design of electronic for Railway environment may kindly be considered as an eligibility criteria. Minimum number of graduated engineers should be specified as employed with the company. Rail Coach Factory, Kapurthala One of the most important part of the specification are eligibility criteria has been decided by RDSO based on which each PU will finalize the tender. Therefore, it is necessary to ensure that the Manufacturers having in-house facilities for manufacturing drivers (which require SMD Machines), LED Panel (which also requires special machines), These two items constitutes 70% cost and there are many manufacturers who have these facilities. For the reliability & life of LED Luminaires, the above parameters need to be kept in the eligibility criteria. The availability of these machines has been indicated in the Clause-14 of the specification. Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore

If the manufacturer is to have technical collaboration with

LED manufacturers, the LED driver / PCB manufacturer

should have freedom to choose LED supplier and Railways

should not approve / nominate LED supplier. If LED is

approved / nominated by Railways, then the onus is on the

Railways to ensure that LED manufacturers comply with

Railway’s requirement.

Not accepted. Clause is OK Not accepted, to ensure competitiveness , clause is OK Not accepted. Clause is OK

12.0 GUARANTEE The Luminaire shall have replacement guarantee for satisfactory performance and manufacturing defects for a period of 60 months from the date of commissioning or 72 months from the date of supply whichever is earlier.

M/s Dhingra Engineering Work Although we ensure the working life of the luminaire to be more than 5 years but, as per IRS terms and conditions we will provide the guarantee period of 24 months from the date of supply and 18 months from the date of installation. Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore

While LEDs have life of over 50,000 hours, some electronic

parts like electrolytic capacitors may not have such long

life. Therefore the warranty for electronics should be 24

months after installation or 30 months from date of supply

while for LEDs it can be as per clause 12. Due to different

warranty periods, marking should also be different for

drivers and fitting.

Not accepted. Clause is OK Not accepted. Clause is OK

13.0 Approval R.T. Vision The firms already approved in the vendor list of RDSO to be exempted from Testing and directly to be included in the vendor list. Northern Railway Guarantee: Standard IRS conditions to be incorporated.

Vendor approving authority shall follow their procedure Not accepted, for quality product and to avoid inferior component, it is necessary. Modified clause: Please see Final draft specification

13.1 While seeking approval, the firm shall submit a sample to the Production Unit along with test results, circuit diagrams and dimensions drawing of the Luminaire. The prototype testing shall be carried out at manufacturer’s work.

Western Railway It is not clarified that which authority / organization will give approval for prototype test as per specification. For workshop and divisions, firm shall submit a sample to consignee and prototype approval will be given by Division or workshop depending on consignee. A Paul For purposes of prototype testing production units have a process of first seeking the manufacturer to bid and with a contract be being L1. We request that sample submission

Vendor approving authority shall give the approval on prototype unit Vendor approving authority will follow their procedure.

and trial should be permitted without insistence on a PO. Northern Railway Prototype testing for Zonal Railways is not indicated. It shall be included.

Vendor approving authority has to do prototype approval.

13.3 Final approval is subject to field trials for a period of three months for performance / lumen measurement of the luminaire with compare to test results during prototype.

Rail Coach Factory, Kapurthala It is mentioned that Final approval is subject to field trial for a period of three months for performance/ lumen measurement of the luminaire with comparison to test results during prototype. This is practically not feasible for production unit as material is purchased for regular production of the coaches. However, vendor approval can be linked with the three month field performance. RDSO may examine accordingly and review.

This clause is practically not possible for the PUs to implement.

Final approval for appearance in the Vendor Directory shall be done after the field trial only.

14.0 DETAILS OF ESSENTIAL INFRASTRUCTURE Rail Coach Factory, Kapurthala This clause gives details of essential infrastructure required for the manufacturing of quality product. This should also be added in the eligibility criteria.

However, in the last para, it has been indicated that the firm may outsource only LED/PCVs. This is required to be deleted because these two items constitute 70% cost - moreovere large many manufacturers available in India having these facilities and only those should be considered for manufacture of LED luminairies. Therefore, RDSO may review and delete outsourcing of LED/PCVs. D.R. Auto With respect to the earlier specification some essential plant & machinery necessary for bringing out the quality manufacturing and testing of the luminaries have been removed from the new specification, such as:-

a. Variable regulated DC supply at least up to 200V. b. Heat chamber / oven having minimum range 0°C to

150°C with alternate arrangement of standby power supply for carrying out endurance tests.

Not accepted to ensure competitiveness, clause is OK a), b), & d) accepted. c) & e) made optional

c. Centre lathe, CNC milling machine, hydraulic press etc. for manufacturing of luminaires.

d. Dark room as per RDSO’s requirements. e. Powder coating plant.

We recommend incorporating the above said infrastructure for maintaining the quality standards, durable manufacturing and long life of the luminaries.

14.1 The following facilities/machinery and plant are considered essential for manufacturing of quality and reliable product:

Dust free environment with ESD protection for the assembly of LEDs/ PCB.

Testing jigs for the testing of assembled LEDs/ PCB.

Component lead forming machines for through hole devices.

Temperature controlled automatic wave-soldering machine with auto-fluxing facilities for through hole devices.

Automatic Temperature controlled re-flow-soldering machine for surface mounted devices.

Stencil and solder paste application machine for surface mounted devices

Automatic Device insertion machine for surface mounted devices with in-circuit testing facility.

All the above facilities are considered essential and shall be verified by Production Units as the case may be before considering the firm as a developmental source. However, the firm may outsource only LEDs/ PCB assembly and soldering with the sub vendor at the developmental stage, who shall have the all above facilities. Railways officials may visit the premises of sub-vendor engaged by the firm for LEDs/ PCB assembly. The firm shall arrange the visit to the sub-vendor’s premises.

R.T. Vision OK, Outsource initally may be permitted against evidence of having these machines with commercial production capacity ordered to be installed in 6 months from the date of CCA or approval. Western Railway Automatic Device insertion machine for surface mounted device with in-circuit testing facility and Pick and place instrument should be added A Paul Kindly rephrase “Automatic Device Insertion Machine” as “Automatic Pick and Place Machine” in circuit testing is a separate module and not a part of the pick and place machine. Since all Electronic s is now SMD type AOI is a more relevant requirement. Both the machine types are allowed to be outsourced as per ELRS/0015 Specification of RDSO.

Not accepted. To ensure competitiveness, clause is OK Already exist in the Specification. OK, corrected in specification

14.2 MOCK UP Facilities for uniformity and lux level

Actual of the coach compartment /cabin (similar to at least two cabins of 3-tier AC coach) and lavatory etc shall be arranged by the manufacturer for measurement of lux level and uniformity level. Achievement shall be submitted along with the test data of prototype sample being offered for witnessing the prototype tests.

Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore

This clause is not practicable and besides every time there

is a change in coach design the mock up needs to be

changed. Railways should conduct the trial in situ in the

coaches and arrive at suitable lab tests for fittings to arrive

at the wattage requirement for various types of fittings to

get appropriate lumen level. This lumen level should be

conveyed to the manufacturers so that these fixtures can

adhere to such illumination details given.

Not accepted as the same is required to maintain uniformity and LUX level.

15.0 ESSENTIAL MEASURING INSTRUMENTS FOR TESTING The following instruments with up-to-date calibration are considered essential for testing purpose: -

Variable regulated DC supply at least up to 200 Volts.

Heat chamber / oven having minimum range of 0-

150C with alternate arrangement of standby power supply for carrying out endurance tests.

H.V.Tester.

Adequate number of meters for measurement of different electrical parameters.

Megger (500Volt)

Measuring Gauges such as Vernier caliper, micrometers, dial gauge,

Non-contact digital thermometer, contact less thermometer and room thermometer.

Digital multimeter.

Digital Weighing machine.

Complete test bench for measuring the different parameters as mentioned in the specification.

Milli-ohm/Micro-ohm meter

Lux meter.

Storage type Oscilloscope.

Power analyzer

Chroma meter

8-channel Digital temperature scanner

R.T. Vision OK Thermal imaging camera should be added. Western Railway Spectrometer for single LED testing. Particular model may not be specified A Paul Spectrometer should be specified as “MAS40 or similar”. Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore

Following are not considered necessary and may be

deleted:-

a) milli ohm / micro ohm meter

b) Storage oscilloscope (Dual beam oscilloscope would

suffice; storage not required)

c) Computerised test set up for electrical parameters of

light testing

d) Clarification is required regarding fluctuation testing

during ‘burn in’ for one hour at 2Hz

M/s Fortune Arrt LED Lighting Pvt. Ltd., Chroma meter or intergrating sphere to measure CCT, x, y, co-ordinated etc. Spectrometer MAS40 or 0.5m integrating sphere for single LED testing.

Not accepted as very small PCB/driver will be used for these luminaire Deleted. Not accepted. Required Not accepted. Required Not accepted. Required Deleted Not accepted. required Deleted Deleted

Spectrometer MAS40 for single LED testing

Computerised test bench for PCB testing

Computerised test setup for electrical parameter of Light testing

All the above facilities are considered essential at the developmental stage itself and shall be verified by Production Units before considering the firm as a developmental source

Needs clarity - fluctuation testing during Burn in for one hour at 2Hz

D.R. Auto a. Spectrometer MAS40 for single LED testing.

Spectrometer shall be essential for LED manufacturers and not the luminaries manufacturers as all the LEDs are procured from approved manufacturers and approved model No. with proper BIN No. from the LED manufacturers. However, there shall not be a particular part No. defined for the spectrometer as it is available from many other manufacturers. The test results can be obtained from a Govt. Approved test lab, therefore, kindly grant the permission for the same and the same shall be deleted from the list.

b. Fluctuation Testing during burn-in for one hour at 2Hz. The same is defined under type test, for which when and if required can be done at Govt. approved test lab. Therefore kindly delete the same from the list. However, if facility required at the manufacturing unit then kindly provide details for the test machine.

c. Computerized in circuit tester for PCB. d. LCR meter for testing of components.

Accepted. deleted from the specification Accepted. deleted from the specification Not accepted. It is essential. Not accepted. It is essential

16.0 New Clause Rail Coach Factory, Kapurthala A new clause – 16 (as given below) may be added in the specification :

Clause – 16 - Annexures - List of Annexures

Anne

xure

No.

Description Type

of

fitting

RCF

Drawing

no.

01 General Layout of

Coupe (ACCN)

-- --

02 Luminaire wise Data to

be furnished by the

Manufacturer while

-- --

Accepted, Suitably added in the specification in place of Annexure 3.

offering for witnessing

the prototype tests.

03 Proposed Indicative

Details for Fitment of

Luminaire.

RCF Comments :

Word “Indicative” may

be deleted from the

heading of this

Annexure.

Corrections : Cut-out

Size for Type of

fittings at Sr. 1 & 2

may be read as 293 x

164 in place of 249 x

164.

-- --

04. LED Light Fitting for

conventional AC & Non

AC-Coaches-

Cabin/Corridor Area

Type-A

(18 W)

CC76452

05. LED Light Fitting for

Doorway & Gangway

AC Coaches/CC

Type-B

( 9 W)

CC76453

06 LED Light Fitting for

Non AC Coaches-

Doorway & Gangway

Type-C

( 5 W)

CC76454

07 LED Light Fitting for

Mirror/Lavatory

Type-D

( 5 W)

LW76092

08 LED Light Fitting for

Night Light with Berth

Indication- Corridor

Area

Type-E

( 1 W)

CC76455

09 LED Light Fitting for

Berth Reading Light

Type-

F1

LW76093

(Longitudinal) ( 3 W)

10 LED Light Fitting for

Berth Reading Light

(Common)

Type-

F2

( 3 W)

LW76094

Upper

Berth

LW76095

Lower

Berth RHS

LW76096

Transverse

Lower

Berth LHS

11 LED Light Fitting for

Emergency Exit

Window

Type-G

( 1 W)

CC76456

12 LED Light Fitting for

Toilet Indication In Ac

Coaches

Type-H

( 1 W)

LW76097

13 LED Light Fitting for

Passenger Alarm Chain

Indication

Type-I

( 5 W)

LW76098

14

LED Light Fitting for

SLR Coaches

Type-J

( 5 W)

CC76457

15 LED Light Fitting for

Entrance Doorway

Type-K

( 3 W)

CC76458

16 LED Light Fitting for

LHB Type Coaches-

Passenger area (Cabin)

Type-L

( 16 W)

LW76090

17 LED Light Fitting for

LHB Type Coaches-

with Night light –

Corridor Area

Type-M

( 9W +

1W)

LW76091

18 LED Light Fitting for

LHB Type Coaches-

Doorway/Gangway

Type-N

( 9 W)

LW76099

area

19 LED Light Fitting for

Chair Car LHB &

Conventional AC

Coaches

Type-O

( 18 W)

LW76100

20 Dummy Fitting for LHB

& Conventional Chair

Car AC Coaches.

Type-P

LW76101

21 LED Light Fitting for

Reading Light Two

Seats LHB Chair Car

Type-

Q1

( 3 W)

LW76102

22 LED Light Fitting for

Reading Light Three

Seats LHB Chair Car

Type-

Q2

( 3 W)

LW76103

23 LED Light Fitting for

Chair Car LHB NON-

AC Chair-car

- LW76104

Annexure 2

LUMINAIRE WISE DATA TO BE FURNISHED BY THE MANUFACTURER WHILE OFFERING FOR WITNESSING THE PROTOTYPE TESTS

Western Railway Annexure 2 is not required As various standards for each type of item and parameter have already been specified, so there is no need for separate annexure. At the same time, test scheme has already been specified in clause 7.5, so this additional information is redundant.

Accepted. Modified

Annexure -2 (1.0)

CUP SPECIFICATION: a. Basic Mechanical dimension

: b. Electrical and control

: c. Light output

: d Cup’s raw specification with operating

characteristics : e. Mechanical characteristics of cup : f. Emission Spectrum : g. Spectral Intensity Distribution

R.T. Vision WHILE OFFERING FOR WITNESSING THE PROTOTYPE TESTS 1.0 LEDSPECIFICATION: Luminius flux is in X and Y ratio in LED manufacturer data sheet. D.R. Auto Ff vs. x,y coordinates. M/s Dhingra Engineering Work Ff vs. x, y coordinates. (as advised by LED manufacturer.)

Annexure 2 modified.

: h. If vs Luminous Flux : i. If vs Correlated Color Temperature :

MIC Electronics Limited, Hyderabad Ff Vs S,y coordinates

2.0 ILLUMINATION CHARACTERISTICS: Tj = 250C, It

=350mA

Sl.No.

Parameter Absolute Values

Min. Typical Max.

1 Luminous Flux (lm)

2 Luminous Intensity (cd)

3 Viewing Angle (Degree)

4 Luminous Efficiency(lm/w)

5 Spectral Length (nm)

6 Dominant Wavelength (nm)

7 FWHM (nm)

8 Color temperature (K)

9 Purity (%)

10 Colour Rendering Index

11 CIE Coordinates

Refer the chromaticity diagram

R.T. Vision Ts=25°C, If= 65/80/175/350mA >150 lumen per watt. D.R. Auto Current value should be blank and shall filled by manufacture and related data can be filled in table for that driving current. M/s Dhingra Engineering Work Current value should be blank and shall be filled by manufacture as per their design and related data can be filled in the table for that driving current. (as advised by LED manufacturer.) MIC Electronics Limited, Hyderabad Current value should be blank and shall filled by manufacturer and related data can be filled in table for that driving current.

Annexure 2 modified.

4.0 BIN RANKING : Tj = 250C, If = 350mA

Sl. No.

Rank Forward Voltage Vf (Volts)

Luminous Flux Øv,lm

Max Min Max Min

1 Rank WD1

2 Rank WD2

3 Rank WD3

R.T. Vision Ts=25°C, If= as per LED 6000-7000K D.R. Auto It is not possible to do the binning at 350mA for all leds. Binning is as per LEDs specification sheet or supplied by LED manufacturer. Forward current value should be blank and shall filled by manufacture and related data can be

Annexure 2 modified.

4 Rank WD4

filled in table for that driving current. M/s Dhingra Engineering Work It is not possible to do the binning at 350mA for all LEDs. Binning is as per LED’s specification sheet supplied by LED manufacturer. Forward current value should be blank and shall be filled by manufacture and related data can be filled in table for that driving current. (as advised by LED manufacturer.) MIC Electronics Limited, Hyderabad It is not possible to do the binning at 350mA for all LEDs. Binning is as per LEDs specification sheet or supplied by LED manufacturers. Forward current value should be blank and shall filled by manufacturer and related data can be filled in table for that driving current.

5.0 COLOR RANKING : Tj = 250C, It =350

mA

Sl. No Rank WD1, WD2, WD3, WD4

X

y

R.T. Vision Ts=25°C, If= as per LED 6000-7000K D.R. Auto It is not possible to do the binning at 350mA for all leds. Binning is as per LEDs specification sheet or supplied by LED manufacturer. Forward current value should be blank and shall filled by manufacture and related data can be filled in table for that driving current M/s Dhingra Engineering Work It is not possible to do the binning at 350mA for all LEDs. Binning is as per LED’s specification sheet supplied by LED manufacturer. Forward current value should be blank and shall be filled by manufacture and related data can be filled in table for that driving current. (as advised by LED manufacturer.) MIC Electronics Limited, Hyderabad It is not possible to do the binning at 350mA for all LEDs. Binning is as per LEDs specification sheet or supplied by LED manufacturers. Forward current value should be blank and shall filled by manufacturer and related data can be filled in table for that driving current.

Annexure 2 modified.

6.0 (a)

Summary of results for day light cups

Sl.No

Stress DUT Conditions Duration

failures

1 Operating life

5 If= 50mA,Tj=80

0C

1800 Hrs

2 Humidity

8 If-100mA,Tj=100

0C,R

H=85%

4058 Hrs

3 Temperature cycle

10 T= -400C

to 1050C

1000 Cycle

D.R. Auto Every LEDs has this data in specification sheet and this value should appear as per specification sheet for every LEDs part number. M/s Dhingra Engineering Work Every LED has this data in specification sheet and this value should appear as per specification sheet for every LED’s part number. (as advised by LED manufacturer.) MIC Electronics Limited, Hyderabad Every LEDs has this data in specification sheet and this value should appear as per specification sheet for every LEDs part number.

Annexure 2 modified.

(b) Operating life: Tested at If = 350mA, Ta =250C

Sl.No

Condition

Luminous flux (lm)

Color Temperature

t-0 t-1800

Δ t-0 t-1800

Δ

1 Worst

2 Mean

3 Best

4 σ

D.R. Auto LM80 report is available for this report. LM-80 report will not be available in exactly same bin and it should be in term of percentage. M/s Dhingra Engineering Work LM80 report is available for this report. LM-80 report will not be available in exactly same bin and it should be in term of percentage. (as advised by LED manufacturer.) MIC Electronics Limited, Hyderabad LM 80 report is available for this report. LM 80 report will not be available in exactly same bin and it should be in term of percentage.

Annexure 2 modified.

7.0 ELECTRICAL SPECIFICATION OF DRIVERS: DC/DC isolation converters shall intended to provide a step down conversion from 90/140V DC to lower voltage of 12VDC, 24VDC and 30VDC and shall be Variable with constant current of 0.35A to >1.0A .

SN

Product (Luminaire)

Nominal Voltage

Voltage range

Output voltage

Current

Power

1 Cabin 110V 90-

D.R. Auto Wattage shall be included in the sentence Integral Coach Factory, Chennai Nominal voltage is mentioned as 110V DC, which may be reviewed in view of comments furnished against s.no. 1 A Paul For each driver type, kindly consider specifying a defined current and voltage output for inter-changeability between vendors like in the case of chokes.

Annexure 2 modified.

DC 140VDC

2 Corridor 110V DC

90-140VDC

3 Toilet 110V DC

90-140VDC

4 Entrance/Exit :

110V DC

90-140VDC

MIC Electronics Limited, Hyderabad Wattage shall be included in the sentence.

15.0 GENERAL CHARACTERISTIC

Type of start :

Internal control :

Nominal input voltage: 110 Volt DC :

Input voltage range 90 Volt DC to 140 Volt DC

:

Power 15 Watt maximum :

Efficiency > 75% :

CEC > 70% :

50,000 hours at 350C(16 hours per day at

340days/year) :

Operating temperature: -250C to 80

0C :

Insulation resistance :

High resistance to vibration :

IP :

No Load power losses :

Output Ripple :

Line Regulation :

Load Regulation :

Weight :

Dimmable via wireless and manual control :

Line under voltage and over voltage protection

:

Accurate Over Temperature and Overload protection

:

DON’T not Feedback Compensation :

Digital Control :

Auto restart for open protection :

Hysteretic over temperature protection :

Self powered :

Current and voltage feedback provides :

R.T. Vision

Operating temperature -10°C to 60°C

Operating Voltage and wattage.

Operating temperature.

No load current.

Weight

Over and under voltage and over load current protection.

Body of the LED made of aluminium.

IP 65compliance

UL 94-V0 Compliance

Certificate of compliance for all components used except coil and transformer by OEM or their supplier.

Diffuser surface temperature

Maintenance and operating manual

Surge protection level at 3.0KV

LM79 Compliance

THD and PF

LED Driving current

capacitor used of 105°C 8000 hours

Transistor , MOSFET used of 125°C

Illumination of luminaire as per clause 5.1 and 6.13

Reflector used

Driver housing

Warranty Integral Coach Factory, Chennai Nominal input voltage is mentioned as 110V DC and input voltage range is mentioned as 90V-140V DC, which may be reviewed in view of comments furnished against s.no.1.

Annexure 2 modified. Corrected

constant current output and protection disconnected load

Operation (kHz) :

U No load specification :

Code of conduct of efficiency of external power supply

:

ROHS complaint :

Remote ON & OFF :

Warranty :

Annex. 3

PROPOSED INDICATIVE DETAILS FOR FITMENT OF LUMINAIRE

A Paul Type D light, if it has a rocker switch cannot be IP65. Kindly allow IP 65 with rocker switch covered. Alternatively captouch switch may be allowed. Alternatively please permit IP 65 relaxation as in the case of BRL. For BRL drawings, no space for driver circuit is depicted. Driver less LED light can be achieved only if SEOUL SEMI ACRICHE LED permitted. Type P light fittings cannot be IP65 by virtue of design. IP65 for LED tube light should be relaxed as it will be required “sealants” to be used which degrade the appearance of the LED lights. LED driver set two output parameters: LED voltage of LED current. LEDs being current driven the main control loop is on the current output and the second control loop is on voltage. By implication, it the Target Forward Current (TIF) is achieved at a lower voltage, the output voltage is automatically adjusted to lower value. Setting the maxVf to 36V DC as standard has a tremendous advantage. If accidentally, a 18W driver is connected to a 9W light, the 9W fitting will not get damaged as 36V maximum output will limit the peak current voltage flowing through the 9W lamp fittings, thus safe guarding it. Western Railways

SN

Type of fitting LxWxD Cut out size as per ICF

Mounting dimensions

EMU

Note accepted. Fittings to be manufactured as per specification. Voltage levels mentioned in specification Not required as drawings are attached

19

Passenger Area MRVC I

1260x185x100

1240x130

1125x150

20

Passenger Area MRVC II

1260x178x100

1240x130

1125x154

21

Passenger Area RF

685x170x75

625x100 570x125

22

Passenger Area AC EMU

1250x200x100

1250x150

1000x177

MEMU

23

Passenger Area of MEMU

685x170x76

Refer RCF drg. No. CC76236

with the specification.

Annex. 4, 5, & 6

Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore Dimensions indicated are same for the above light fittings whereas wattages are different viz., 18W, 9W and 5W. It would be prudent to have fittings of lesser dimensions for lesser wattage as the distribution of light will not be regular and smooth. Also use of a large fitting used for 18W is not recommended for a 5w requirement as it is not cost effective nor aesthetically appealing.

5Watt fitting replaced by 9W. For 9W & 18W fittings, same dimensions are required.

Annex. 19

Integral Coach Factory, Chennai Two drivers are shown for Type-O fitting, requirement of which may be examined.

Corrected drawings attached.

Integral Coach Factory, Chennai Comparison of overall dimensions, cut-out size and mounting dimensions between ICF type fittings and RDSO type fittings is furnished in Annexure-B.

Not required as detailed drawings incorporated.

Routine Test General Auto Electric Corporation Should include burn in test at 45 deg C for 72 hours to ensure no light fails in coach and eradicate manufacturing defects.

Included

CRI General Auto Electric Corporation CRI data of the LED used shall be provided by the LED manufacturer.

Accepted. mentioned in the specification.

Clause No. 5.0 (e), 5.1 (a), 5.1 (b), 5.1 (d), 5.1 (f), 5.1 (g), 5.1(j), Note 4 of Cl. 6.12, 6.13, 8 (xi)

Premier Combines , Chennai & Best Choice Systoms P. Ltd, Bangalore

Not accepted. Compliance by LED

These clauses in this specification will require compliance by the LED manufacturers whereas specification stipulates responsibility on the manufacturer of LED driver / fitting which is not justified or correct.

manufacturers is to be ensured by Luminaire manufacturer.

North Western Railway

Existing very old Non AC sleeper coaches having night lights fittings with indecent type lamp, 15 W & some coaches having 5W CFL type fittings, Retro-fitment type LED lamps & wattage may also be clarified for above night light fittings.

Existing AC coaches having berth reading lights fittings with indecent type lamp, Retro-fitment type LED lamps & wattage may also be clarified for above berth light fittings.

As per Railway Board’s letter No. 2006/Elec(G)/165/1 dated 10.12.2014, the LED luminaries as per RDSO’s Specification for coaches are to be procured from open market. It may be clarified.

Included in spec. Included in spec Railway Board vide letter No. 2006/Elec(G)/165/1 dated 10.12.2014 instructed that Zonal Railway & PUs may develop sources for procurement of this item as per the spec. issued by RDSO.