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Page 1 of 23
Issued on XX/10/2017 Spec. No. RDSO/2016/EL/SPEC/0123, Rev. ‘1’
lR;eso t;rs
GOVERNMENT OF INDIA
MINISTRY OF RAILWAYS
Specification for Oil Cooling Unit with Casing for
Transformer/Converter of Three Phase Locomotives
Specification No. RDSO/2016/EL/SPEC/0123, Rev. ‘1’
Issued on XX/10/2017
ELECTRICAL DIRECTORATE
RESEARCH, DESIGNS & STANDARD ORGANISATION
MANAK NAGAR, LUCKNOW – 226 011
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ADE/SE&AM
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Approved by Signature
Sr.EDSE
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Status of Revision
S. N. Date of Revision Page No. Revision Reasons for Revision
1. - All 0 First Issue.
2. XX/10/2017 7 1 1. Clause no: 9 stipulated as “The
Motor, Impeller and Casing shall be
interchangeable with other make so that
the performance of the Oil Cooling Unit
is kept within the limits of the standard ”
modified to “ The motor and blower unit
(casing + impeller) shall be
interchangeable with other make”
2. Clause no: 16 stipulated as “The
drawings are for guidance. However,
the dimensions are to be followed so
as to ensure interchangeability of
motor, impeller and casing with other
makes”. modified to “The drawings
are for guidance. However, the
dimensions are to be followed so as to
ensure interchangeability of motor,
blower unit (impeller + casing ) with
other makes”.
3. Clause no: 16 table item no : vi
title stipulated “Impeller for Oil
Cooling Unit for
transformer/converter” modified to
“Impeller for Oil Cooling Unit for
transformer/converter ( for guidance
only )”.
4. Clause no: 16 table column title
‘Revised Drawing number as per RDSO
specification’ deleted.
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INDEX
Clause Number Item Page no
1.0 Scope 4
2.0 Terminology, Symbols and Units. 4
3.0 Reference Standards 4
4.0 Technical Particulars 4
5.0 Service Conditions. 5
6.0 Design and General Construction 6
7.0 Special construction features 6
8.0 Finish 7
9.0 Inter-Changeability 7
10.0 Marking plate 7
11.0 Maintenance Instructions 7
12.0 Drawings 7
13.0 Data 7
14.0 Tests 7-10
15.0 Field Trial 10
16.0 List of Drawings 10
Technical particulars of oil cooling unit. Annexure-I 11&12
Standard procedure for calculation of fan delivery
parameters Annexure-II 13-15
Data Sheet of Oil Cooling Unit
Annexure-III 16
Motor for Oil cooling Unit Annexure-IV 18
Oil Cooling Unit for transformer/converter
Annexure-V 19
Annexure-VI 20
Annexure-VII 21
Annexure-VIII 22
Annexure-IX 23
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SPECIFICATION AND TEST SCHEDULE FOR OIL COOLING UNIT FOR
TRANSFORMER /CONVERTER
1.0 Scope
1.1 This specification covers the performance requirements and tests of Oil Cooling
Unit(OCU) with Centrifugal Design Impellers for transformer/converter fitted in 25 KV
AC/50 Hz 3 phase drive electric locomotives.
1.2 Oil Cooling Unit includes following.
- Blower casing
- Mounting Base
- Blower including 3 –phase Induction motor
1.3 Each locomotive is equipped with 3 auxiliary converters each rated at 100 KVA. These
converters directly gets supply from a common auxiliary winding of 1000 V (corresponds
to 25 KV catenary voltage) from the main transformer. The three phase output voltage of
the auxiliary convertor 1&2 feeds variable voltage and variable frequency to the Oil
Cooler Unit in 3 steps (17 Hz, 33Hz, and 50 Hz) by the control electronics which gets
signal from the temperature sensors in Oil Cooling Unit circuit.
1.4 All OEMs who were approved for centrifugal design OCU as per CLW specification no.
CLW/ES/3/0647 Alt. E will remain approved with this specification also with same
status.
1.5 All the provisions contained in RDSO’s ISO procedure laid down in Document
No.QO-D-7.1-11 dated 19.07.2016(titled “Vendor-Changes in approved status”)and
subsequent versions/amendments thereof, shall be binding and applicable on the
successful vendor/vendors in the contracts floated by Railways to maintain quality of
products supplied to Railways.
2.0 Terminology, Symbols and Units.
For the purpose of this specification, the definitions given in IS: 4894 and shall apply.
3.0 Reference Standards
In preparing this specification assistance has been taken from the following
specifications.
IS: 4894 - Specification for centrifugal fans.
IS: 12075 - Measurement and Evaluation of Vibration of Rotating Electrical Machines.
ISO-1940 - Specification for dynamic balancing.
IEC 61373 - Shock & Vibration test.
4.0 Technical Particulars
The technical particulars of Oil Cooling Unit is given under Annexure-I.
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5.0 Service Conditions.
5.1 The equipment and mounting arrangement shall be of robust design for traction duty and
shall withstand satisfactorily the vibration and shocks normally encountered in service as
indicated below:
a) Maximum vertical acceleration 1.0g
b) Maximum longitudinal acceleration due to shock. 3.0g
c) Maximum transverse acceleration 1.0g
5.1.1 The vibrations are of sine wave form and the frequency ‘f’ vibration is between 1 Hz and
50Hz. The amplitude ‘A’ expressed in millimeters is given as a function of f, by the
equations:
A= 25/f for values of f from 1 Hz to 10 Hz
A= 250/f2 for values of f exceeding 10 Hz upto 50Hz.
5.1.2 In the direction corresponding to the longitudinal movement of the vehicle, the
equipment is subjected for 2 min to 50 Hz vibration of such a nature that the maximum
acceleration is equal to 3g (amplitude ‘A’=0.3mm).
5.1.3 The level of harmonics in three phase electric locomotives is of the order of 50% each for
voltage & current.
5.1.4 Climatic and Environmental conditions
Atmospheric
temperature
: Maximum temperature of metallic surface under the Sun: 75oC
and in shade: 55oC .
Minimum temperature: - 10oC (Also snow fall in certain areas
during winter season).
Humidity : 100% saturation during rainy season.
Reference site
conditions
: i) Ambient temperature: 50oC .
ii) Humidity: 100%.
iii) Altitude: 1776 m above mean sea level.
Rain fall : Very heavy in certain areas.
Atmospheric
conditions
: Extremely dusty and desert terrain in certain areas. The dust
concentration in air may reach a high value of 1.6 mg/m3. In
many iron ore and coal mine areas, the dust concentration is very
high affecting the filter and air ventilation system.
Coastal area : Humid and salt laden atmosphere with maximum pH value of 8.5,
Sulphate of 7 mg per liter, maximum concentration of chlorine 6
mg per liters and maximum conductivity of 130 µ Siemens / cm.
Wind speed : High wind speed in certain areas, with wind pressure reaching
150 kg/m2.
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6.0 Design and General Construction
6.1 Drive and coupling
The fan impeller shall be directly mounted on the motor shaft. A Steel/Aluminium boss of
circular shape should be cast/rolled and fixed with bolting /welding/brazing to Aluminum
impeller (centrifugal design). The drive may be by a key of adequate strength with the
impeller locked in position shall be further locked against, unscrewing in service by
locking plates. Alternatively a tapered shaft without a key but with locking arrangement by
bolt and locking plate may be used.
6.2 Direction of rotation
An arrow indicating the direction of rotation shall be permanently marked on the blower
casing.
6.3 Balancing
The rotor and the blower impeller shall be dynamically balanced individually, in quality
grade G 2.5 of ISO-1940.
6.4 Vibration:
The peak to peak value shall not exceed 25 microns on motor body, foot and bearing of
motor and 40 microns at blower casing.
6.5 Lifting arrangements
Suitable lifting arrangement for the blower fan and the motor separately and for the
complete unit shall be provided.
7.0 Special construction features
7.1 Special manufacturing processes: As the blowers operate for long periods at high speeds;
the impeller blade should be designed with a higher margin of safety as compared to
normal industrial designs and stress calculation for the same shall be furnished.
7.2 Casing
Casing should be of heavy duty industrial design and shall be of mild steel with minimum
thickness of 3 millimeter or Aluminium alloy of 5 millimeter thickness. It should not
deform during lifting. It should be of single side intake having mixed flow form with axial
intake direction and radial discharge direction with centrifugal impeller flow fan. All
outside welds of the housing should be welded continuously. Casing shall be designed as
per existing arrangement of centrifugal fans provided on 25 KV ac electric locos type
WAP-5 & 7 /WAG-9.
The inlet cone may be manufactured by spinning/fabrication/welding process. It shall not
be hammered to give the cone shape. Inlet cone shall be die formed.
7.3 The mounting arrangement of the blower on the casing shall be properly secured so as to
avoid loosening during the vibrations countered in service.
7.4 Centrifugal Impeller can be Fabricated /Casted. The dimension stipulated in the drawing
placed at Annexure –IX is for reference.Impeller diameter shall not be more than 710 mm.
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8.0 Finish
The fan motor, blades and the casing shall be suitably treated to remove rust and should
be coated with an anti-rust primer and finished with two coats of RAL 7030 stone grey
silk paint. All hardwares shall be cadmium plated.
9.0 Inter-Changeability
The motor and blower unit (casing + impeller) shall be interchangeable with other make.
10.0 Marking plate
Each Oil Cooling Unit shall have a suitable name plate having the following information
engraved/punched on it:
i) Manufacturer’s name, Type and Serial Number.
ii) Air Delivery
iii) Total Head at 200C.
iv) Rated Speed.
v) Make of the Motor
vi) Power consumption in KW.
vii) Impeller Diameter.
viii) Weight of the unit.
ix) Manufacturing Date and Year.
x) Impeller Serial Number , Manufacturing Date & Year to be punched /etched on
Steel /Aluminium boss.
11.0 Maintenance Instructions
The manufacturer shall supply detailed Maintenance Instructions as desired by the
purchaser.
12.0 Drawings
The drawings (to be asked by the purchaser) giving the overall dimensions of the Oil
Cooling Unit shall be supplied with the tender.
13.0 Data
The particulars of the Oil Cooling Unit set shall be furnished in the data sheet at
Annexure -III.
14.0 Tests
14.1 General
Tests are classified as Type and Routine tests.
14.2 Type & Routine tests on Motor
The Type & Routine tests on prototype motor shall be conducted as per RDSO
specification no. E-10/3/09(Motor) with latest amendments.
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14.3 Tests on Oil Cooling Unit
The following are the different tests on the complete Oil Cooling Unit with Casing.
a) Type Tests
i) Air Delivery Test.
ii) Starting Time Test.
iii) Starting Duty Test.
iv) Endurance Test.
v) Vibration level Test in line with IEC 61373.
vi) Weighment.
vii) Checking of bearing by shock pulse meter.
viii) Checking of dimensions, workmanship, clearances of impeller fixing and locking
arrangement.
ix) Starting Current , Running Current , Starting Time with full load at
- 373V, 33Hz
- 415V, 50Hz to be recorded.
x) The balancing of rotor with impeller shall be done and to be witnessed by
inspecting officials. The balancing shall conform to grade 2.5 of ISO-1940.
xi) Visual Inspection for workmanship and Dye Penetrant Test (DPT) on impeller
welding.
xii) Noise measurement at a distance of one meter from the equipment in all direction.
b) Routine Tests
i) Checking of obligatory dimensions and clearances of impeller fixing and locking
arrangement.
ii) Starting time test
iii) Vibration level test.
iv) Condition of bearing by shock pulse meter.
v) Visual inspection for workmanship and DPT on impeller welding.
vi) Noise measurement at a distance of one meter from the equipment in all direction.
Unless otherwise specified in the contract the test and the method of measurement
adopted shall comply with Indian Standard specifications for centrifugal flow
fans.
14.3.1 Details of Type Tests
14.3.1.1 Air delivery test
Test shall be carried out with the supply to the driving motor maintained at 415(± 10%)
at 50Hz. However it is desirable to conduct the tests at 33 Hz also with supply from the
VVVF drive. Adequate number of observations shall be made on both sides of the
operating point to plot the characteristic curve. Measure the following quantities.
i) Line voltage
ii) Line current
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iii) Power input
iv) Speed
v) Total pressure.
vi) Ambient temperature.
The manometer pressure readings shall be taken at 4 points at least to arrive at a mean
value as per IS 4894.
Calculate the blower output at standard conditions Wt. =1.2 kg/m3.The standard
procedures to be followed for calculation of fan delivery parameters is given under
Annexure-II.
14.3.1.2 Starting time test
With a test installation similar to that adopted for the air delivery test, start the blower
successively at 415V and 373V. Measure oscillographically or by any other accurate
method, the starting time of the motor for Oil Cooling blower Unit from zero speed to
the full speed. Record starting current, running current, starting time with full load at
373V, 33Hz and 415V, 50Hz.
14.3.1.3 Starting duty test
The Oil Cooling Unit shall be subjected to repeat “start and stop” cycle for 1000 times
at a supply voltage of 415V. The ‘ON’ and ‘OFF’ period shall be 1 minute in each case.
If the unit takes more than 1 minute to stop fully, the next start shall commence
immediately after the unit has stopped. At the end of the test, the efficacy of impeller
locking device shall be checked; the impeller shall then be dismantled and various parts
like key, key way and the fit of the impeller on the shaft shall be examined for wear and
any abnormal condition.
14.3.1.4 Endurance test
This test shall be conducted for a period of 48 hours with rated output and head with
415 V supply at the motor terminals. After the test, the blower and the motor shall be
dismantled and examined for wear and tear of the parts and conditions of bearings etc.
14.3.1.5 Vibration level test.
For the measurement of vibration intensity, electronic vibration measurement
equipment having a frequency range of 5 to 2000 CPS shall be employed. Vibration
measurement shall be made at motor body, foot and bearing of motor and blower
casing.
Limits of vibration intensity: The peak to peak value shall not exceed 25 microns on
motor body, foot and bearing of motor and 40 microns at blower casing.
14.3.1.6 Condition of bearing by shock pulse meter
Condition of bearing shall be checked at rated voltage and frequency. The deflection
shall be within green zone of the instrument.
14.3.1.7 Testing of material and welding strength.
(i) Suitable size of test piece of material used for manufacturing of impeller shall be
prepared for testing .
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(ii) Two sets of test piece shall be welded & be kept ready for checking the welding
strength.
Note: The test for welding strength shall preferably be done at firms premises.
However, same may be tested at Government Accredited Laboratory if facility
is not available.
14.3.2 Details of Routine Tests
Same as item no: 14.3 b) and its procedure given in type test 14.3.1
15.0 Field Trial
Oil Cooling Unit with Casing shall be subjected to extensive field trials for a period of
at least 12 months after fitment on locomotives. During field trials; performance of
the OCU with casing shall be observed & recorded.
16.0 List of Drawings
The drawings are for guidance. However, the outer dimensions required so as to ensure
interchangeability of motor, blower unit (impeller + casing ) should be followed.
SN Existing Drawing No.as
per CLW Specification
no: CLW/ES/3/0647 ALT E
Title Page no.
i CLW/ES/3/SK-2/0647 Motor(200L) for oil Cooling Unit for
transformer/converter
ANNEXURE-IV
ii CLW/ES/3//0647 ALT B Oil Cooling Unit for
transformer/converter
(for guidance only)
ANNEXURE-V
iii CLW/ES/3/SK-4/0647
ALT B
Oil Cooling Unit for
transformer/converter
ANNEXURE-VI
iv CLW/ES/3/SK-5/0647 Bracket for casing(WAG-9) ANNEXURE-VII
v CLW/ES/3/SK-6/0647 Support for bracket , self gripping
rubber gasket, looming bar & MS
channel.
ANNEXURE-VIII
vi CLW/ES/3/SK-1/0647 Impeller for Oil Cooling Unit for
transformer/converter
(for guidance only)
ANNEXURE-IX
Note:
a) All rubber items and hardwares shall be procured from CLW approved sources.
b) OEMs shall submit the Bill of material (BOM) and shall get approved by RDSO.
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ANNEXURE-I
TECHNICAL PARTICULARS OF OIL COOLING UNIT
1. Blower
(i) Type : Aluminum Impeller of centrifugal design
(ii) Fan Duty Point at rated speed
and 200C
: 8.2m3/s at 1781 Pascal
(iii) Rated speed : 2920 rpm
(iv) Driving motor : 30kW Squirrel cage Induction Motor
(v) Details of Pressure drops
- Cooler section ,air
side
: 800Pa
- Inlet/Outlet
ducts/filters
: 930Pa
- Reserve : 51Pa
- Total fan Pressure : 1781Pa
2. Motor
(i) Type : 3 Phase, 30kW, 2 Pole Squirrel Cage, Totally
enclosed surface cooled as per RDSO
specification No.E-10/3/09(Motor) with latest
amendments.
(ii) Frame Size & Mounting
Arrangement
: 200L foot mounted as per IS 1231
(iii) Motor Rating:
(a) Nominal Mechanical Power
:
30kW
(b) Rated Speed : 2920 rpm
(c) Rated Voltage : 415 ±10%V,3 Phase
(d) Rated Current : 50Amp
(e) Starting Current : 320Amp or less
(f) Class of Protection : IP 54
(g) Type of Enclosure : TESC
(h) Duty cycle : S1 continuous
(i) Wave form : Quasi-square wave
(j) Cos Ø : Not less than 0.84
(k) Efficiency : Not less than 88%
(l) Bearing Size : DE & NDE 6312-open type
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Make: From RDSO approved sources of
relevant size
(m) Insulation : H class VPI (corona resistant copper winding
wire of RDSO approved make should be used)
(n) Harmonics in Voltage : 50%
(o) Harmonics in current : 50%
(p) dv/dt : Less than 1000V/micro second
Note: - Other parameters & performance requirement of motor will remain same as
mentioned in RDSO specification No. E-10/3/09 (Motor) with latest
amendments.
3. Starting performance: The blowers shall accelerate from stop to the full speed within
six seconds over the entire range of supply voltage i.e.415±10%.
4. The following tolerance shall be applicable:
Characteristic Tolerance
Volume flow -5%
Motor Power input +10%
Static or total efficiency -5%
Speed ±10%
5. The centrifugal flow fans covered by this specification are capable of working against
pressure.
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ANNEXURE-II
STANADARD PROCEDURES FOR CALCULATION OF FAN DELIVERY
PARAMETERS
1. Test set up for air delivery shall be as per IS 4894.
2. Make a sketch of testing duct and record various dimensions of test set up arrangement.
3. Air delivery test shall be carried out at 373V, 415V and 457V, all at 50Hz, 3 phase power
supply to driving motor.
4. Starting from full open position to full close ,adequate number of measurements on either
side of duty point shall be recorded as per procedure given in IS 4894 so that sufficient
data point becomes available for drawing a smooth fan characteristic curve. In any case,
at least 2 readings on either side of duty point and one reading near duty point must be
taken. The suitable no: of charges of mesh with difference holes simulating to 25% ,50%
& 75 % closing shall be available in line with IS 4894.
Observed values starting from full open to
full close position
Observations Full open Full close
Pressure at section AA(Paa) in mmWG
Pressure at section BB (Pbb) in
mmWG
Test speed in rpm
Current(Amp)
Voltage(Volts)
Power Factor
Motor Input(kW)
Frequency of supply
Ambient temperature near section
BB(t) in degree Celsius
5. For each of above observations, the values of air flow, fan total pressure, fan static
pressure; fan efficiency and overall combined unit efficiency shall be calculated and shall
be converted at rated speed and temperature.
6. From the values of air flow and fan total pressure at rated speed and temperature, Fan
characteristics curve along with system resistance curve shall be drawn. The curves for
fan efficiency and static pressure versus flow shall be drawn on same graph. The
intersection of fan characteristics curve and system resistance curve shall be taken as
operating point of the fan. The operating point should fall on right side of the specified
fan duty point.
7. Three set of observations, calculations sheets and curves for 373 V, 415 V and 457 Volts
shall be furnished.
8. Calculation sheet along with formulas to be used for determining fan characteristic curve
& efficiency is as under.
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Duty Point at 200C as per spec.
Rated Q(m3/s)
Rated FTP at 200C(Pa)
Rated RPM
Fan Diameter
Test Duct diameter in meter, D
Test Duct Area(sq m)
Fan Outlet area(sq m)
Barometric Pressure(mmHg)
‘B’
Coefficient of discharge, Cd
Cd2
Motor efficiency (%)
Observations Observations from
full open to full
close
Paa (mmWG)
Pbb-Ps(mmWG) ,
Ps:- absolute pressure of the
ambient atmosphere.
Test Speed(rpm)
Motor Input(kW)
Amb Temp(t) near section
BB ,0C
Calculations Formulae
Density of air at section BB,
Wt(kg/m3)
1.2 X (B+0.737Ps) X (273+20)
760 (273+t)
Inlet Volume, Qv(m3/hr) 12500XCdXD
2X√(Paa/Wt)
Outlet Velocity (Vo),m/hr Qv/Outlet Area
Velocity Pressure at
outlet,Vpot = Tpot
(mmWG)
Wt X (Vo/16000)2
Velocity Pressure at fan
inlet (mmWG), Vpi Paa X Cd
2
Total Pressure at fan
inlet(mmWG),Tpi Pbb + Vpi
Fan Total Pressure at temp t Tpot - Tpi
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(mmWG),FTPt
Motor Output (Mo), kW (Motor input x Efficiency)x100
Conversion to Rated Speed and Temperature
Volume at rated speed in
m3/hr,Q1
Qv X Test Speed
Rated speed
Volume at rated speed in
m3/s,Q2
Q1
3600
Outlet Velocity(VO) at
rated speed, m/hr
Q1
Outlet Area
Velocity Pressure at
Outlet at rated speed and
temp, Vpo
1.2 X(VO /16000) 2
FTP at rated RPM and
temp
2
Rated rpm 1.2
FTP X Test rpm Wt
Fan Static Pressure at
rated rpm and temp FTP-Vpo
Shaft Power(kW) at rated
speed & temp
3
Mo X Rated rpm X 1.2
Test rpm Wt
Air power in kW at rated
speed & temp
2.723 X Q1 X FTP X 10-6
Fan efficiency (%)
Air Power
X 100
Shaft Power
Overall efficiency of the
combined unit
(OCB+Motor)(%)
Air Power
X 100
Motor input
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ANNEXURE-III
Data sheet for Oil Cooling Unit
1. Blower
A.1 Type, model and make.
A.2 Air delivered in cubic meter per minute and total head in mm WG corrected to 200C and
760 mm barometric pressure at rated voltage
A.3 Design data
a) Impeller diameter.
b) Type of impeller blades.
c) Number of blades.
d) Method of fixing of the blades.
e) Clearance between inlet cone and impeller (maximum 6mm and minimum 1.5mm)
f) Maximum shaft speed of the impeller.
g) Motor shaft and impeller bore diameter (maximum and minimum).
h) Method of fixing of impeller on motor shaft and locking arrangement.
i) GD2 value of the impeller (indicated the maximum variation in manufacture).
J) Stress calculation for impeller and casing.
Note: GD2 value of the impeller will be made use for calculating the starting
performance of the blower with regard to the specified electric motor. As such the
value to be furnished should take into account the inertia, the friction and the
resistive torque of the impeller while it is being started.
A.4 The manufacture shall furnish the speed- torque characteristic of the blower. This is
required for matching the motor and the impeller.
A.5 Torque necessary for the blower when working against constant rated head and
delivering the rated output.
A.6 The supplier shall enclose the following characteristic curves at 200C and 55
0C.
a) Total and Static head vs. air delivery.
b) Total and Static efficiency vs. air delivery.
c) Air horse power vs. air delivery.
d) Power absorbed vs. air delivery.
e) Speed vs. Air quantity in m3/sec.
A.7 Vibration level in microns.
A.8 Furnish the welding strength calculation for the joint between impeller and back plate and
cone.
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A.9 Furnish calculation for locking strength, impeller locking arrangement and key strength.
A.10 Necessary dimensioned drawings of the blowers and its all components showing the
constructional and material specification as per IS or any other relevant international
standard for assembly details shall be submitted.
2. Data sheet for Motor
1 Application
2 Type
3 Rated voltage
4 Number of phases(Star/Delta)
5 Frequency
6 Speed
7 Continuous rating(HP/kW)
8 Rated current
a)At rated voltage (415V)
b)At lowest voltage(373V)
9 Slip at full load in percentage at-
a) Rated voltage (415V)
b)Lowest voltage(373V)
10 Class of insulation
11 Type of enclosure
12 Method of ventilation
13 Type of protection
14 Frame size
15 Overall dimension
16 Type & make of bearing
17 Size of bearing and their estimated L10 life
18 Weight of the motor
- Weight of rotor
19 Rotor construction
20 GD2 value of the rotor(indicate the maximum variation)
21 Starting current and torque in kgm
a) at 373 V
b) at 457 V
c) at 415 V
22 Any deviation from the specification indicating reasons thereof may please be
explained.
23 Corona resistant winding wire used as per amendment no 3
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ANNEXURE-IV
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ANNEXURE-V
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ANNEXURE-VI
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ANNEXURE-VII
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ANNEXURE-VIII
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ANNEXURE-IX