fewa lv cable specs

8/10/2019 FEWA LV Cable Specs

1/46

SPECIFICATION NO. CBL - 3.1(Revised in March 2010)

600/1000 VOLTS CROSS LINKED POLYETHELENE(XLPE) INSULATED CABLES

1. Standard Specification

The cables shall conform and comply with the latest editions of the appropriateIEC standards (IEC 60502-1, IEC 60811 & IEC 60228 and any other relevantIEC standards) or any other equivalent international standard with all its latestaddendum and amendments and shall be subject to the approval of FEWA.

2. Site Conditions

The cables shall be suitable for continuous duty under specified systemconditions, in the hot, humid and salty climate prevailing in the area. Themaximum values of humidity and temperature experienced in this country are100% and 500 C. respectively.

3. Scope and Nature of Work

The specification provides for the design, manufacture, test at manufacturer'sworks in the presence of two FEWA inspectors, suitable packing, transportationand off loading at site of works or FEWA stores in satisfactory conditions andproper stacking as directed by FEWA.

4. Construction3 1/2 & 4 Core Cables

These cables shall be cross-linked polyethylene insulated, steel wire armouredand PVC served. The conductor shall be made from stranded Aluminium orCopper as asked for in the Bill of Quantities and shall be in accordance withIECor International equivalent Standard. Drawing(s) showing the crosssectional area of the cable(s) shall be submitted along with the offer.

5. Neutral

The neutral of the 3 1/2 core cables shall have half the size of the phaseconductors while that of 4 core cables shall have the same size as the phaseconductors.

6. Shape of Cores

For 3 1/2 cores cables the 3 cores shall be sector shaped and the 1/2 coreshall be sector/round shaped.

For the 4 cores, all shall be round shaped.

7. Sizes of 3 1/2 and 4 Core Cables

3 1/2 core cables mentioned in this specification shall have the following sizes:-

a) 300 sq.mm b) 185 sq.mm c) 95 sq.mm

CBL - 3.1 (Page 1 of 15)


2/46

The 4 core cables shall have the following sizes:

a) 70 sq.mm b) 50 sq.mm c) 35 sq.mm d) 25sq.mm

8. Single Core Cables

These cables are 630 sq.mm XLPE insulated, unarmoured and PVC servedhaving stranded copper conductor.

9. Two Core Cables

These cables are 16 sq.mm & 25 sq.mm XLPE insulated, steel wire armouredand PVC served having stranded copper or aluminium conductor.

10. Insulation

The insulation shall be cross-linked polyethylene. The physical properties ofthe insulation shall conform to the requirements of IEC 60502 & 60811. Thenominal thickness of insulation shall be as per the following table and shall beguaranteed by the manufacturer to withstand the specified system voltages.

Nominal cross section Thickness of XLPEArea of conductor Insulation

16 mm2 0.9 mm25 mm2 0.9 mm35 mm2 0.9 mm50 mm2 1.0 mm

70 & 95 mm2 1.1 mm185 mm2 1.6 mm300 mm2 1.8 mm630 mm2 2.4 mm

11. Inner Sheath

The inner sheath shall consist of an extruded layer of PVC type ST-2 and shallconform to IEC 60502-1.

12. Armouring

The armouring of the cables shall consist of round galvanized steel wiresconforming to IEC 60502-1 and the mass of zinc coating shall not be less than275 g/m2.

13. Outer Sheath

The outer sheath shall comprise of an extruded PVC sheath applied over thearmour. The outer PVC sheath shall be fire and termite resistant and shallconform to type ST-2 of standard IEC 60502-1.

14. Identification

The following identification marks shall be permanently embossed on both sides (if possible)of the outer sheath of the cable (diagonally opposite side) in the same sequence bydigit size not less than 6 mm.

CBL - 3.1 (Page 2 of 15)


3/46

at suitable intervals. 600/1000 Volts, ... .... ... mm2,No. of cores ... ... Copper/Aluminium cable, XLPE insulated, property of FEWA - UAE - Year ofManufacture, Manufacturer's Name.

Length of cable on one meter intervals shall be embossed on outer sheath .with digit size not less than 6 mm .Marking on the outer sheath shall indicatecumulative length of the cable, wound on the drum such marking starting with

000 on the inner end and accumulative length on top layer of the drum.

15. Colour Coding

All cores shall be colour coded. in Red, Yellow, Blue for phases and Black forneutral.

16. Packing

The cables shall be wound on a suitable non-returnable strong drum to preventdamage during storage and transport. On the side of the drum, necessarydescription, such as Order No., type, voltage, size, material of conductor, grossand net weight of the cable, length, direction of rolling and drum number etc.shall be clearly marked. Completed cable shall be sealed at both ends to avoid anyingress of moisture, foreign bodies etc. No drum shall contain more than onelength of cable. The diameter of bore for the cable drum for inserting the shaft,shall not be less than 80 mm.

17. Current Rating and Temperature Rise

The cable shall be capable of withstanding the maximum conductortemperature of 900C in continuous operation and a temperature of 1300C for alimited period. Under fault conditions the cable shall be rated to withstand afinal temperature of 2500C.

Guaranteed current carrying capacity at 350 C soil temperatures shall bementioned in the appropriate column of the schedule of guaranteed particulars.Thermal resistance of filling sand shall be considered 20m/w.

18. Test Certificate

Certified copies of the type test certificates shall be supplied along with theoffer. Type test certificates more than seven years old are not acceptable. Iftype test certificates which are acceptable to FEWA, are not enclosed with theoffer. Authority reserves its rights to ask the Tenderer to conduct all or any ofthe type tests in presence of FEWA representatives at no extra cost to FEWA

The type tests shall be carried out as per relevant clauses of IEC 60502-1.

Routine Test

Routine tests shall be carried out on all lengths of ordered cable atmanufacturers works as per IEC 60502-1 during the time of manufacture andreports of these tests shall be forwarded to FEWA

19. Witnessing test at Manufacturer's Works

The following tests (routine and special as mentioned in IEC 60502-1) will becarried out in presence of FEWA representatives at the Manufacturer's works.

1) Resistance measurement of cores and armour.

2) High voltage test: 3.5KV AC or 8.4KV DC for 5 minutes or spark voltage test.

CBL - 3.1 (Page 3 of 15)


4/46


5/46

SCHEDULE A

SUB-MANUFACTURERS

The Tenderer shall state below the names of the sub-manufacturers to the mainmanufacturer and details of the equipment proposed to be manufactured or supplied bythem:

Name & Address of the Sub-Manufacturer

Signature

Designation

Name of Tenderer

Date

Description of Equipment

:_________________________

:_________________________

;_________________________

:_________________________

CBL - 3.1 (Page 5 of 15)


6/46

SCHEDULE B

PLACE OF MANUFACTURE, TESTING AND INSPECTION

The Tenderer to complete the following schedule for all materials he proposes to supply

ItemNo. Description Manufacturer

Signature

Designation

Name of Tenderer

Date

Place of Place of testingmanufacture and inspection

:_________________________

:_________________________

;_________________________

:_________________________

CBL - 3.1 (Page 6 of 15)


7/46

SCHEDULE C

DEVIATION FROM TENDER SPECIFICATION

The Tenderer to state in the following schedule the deviations from the tender specificationsproposed in his offer. Deviations other than those specifically listed below will not be taken

note of:

ItemNo. Description Precise Details of the Deviations

Signature :_________________________

Designation :_________________________

Name of Tenderer ;_________________________

Date :_________________________

CBL - 3.1 (Page 7 of 15)


8/46

SCHEDULE D

TECHNICAL PARTICULARS AND GUARANTEES

600/1000 Volts 3-1/2 and 4 core cables XLPE insulated galvanized steel wire armoured and PVC

served

The tenderer to give the following technical particulars of the 600/1000V 3-1/2 and 4 core cableoffered.

P a r t i c u l a r s

Sl.

No.

1.

2.

3.

4.

5.

6.

7.

8.

9.

Description Unit

Name & Address ofManufacturer

Place of Manufacture

Place of Testing

Country of Origin

Voltage rating of cable KV

Standard to which the cableconforms (Ref. No. ofstandard)

Type of cable

Shape of conductor

Shape of neutral conductor

3.5x300 3.5x185 3.5x95 4 x 70 4 x 50 4 x 35 4 x 25

sq.mm sq.mm sq.mm sq.mm sq.mm sq.mm sq.mm

Alum. Alum. Alum. Alum. Alum. Alum. Alum.

10. Sectional area of phaseconductor

a) Area

b) Strands

c) Diameter of strand

11. Sectional area of neutralconductor

a) Area

b) Strands

c) Diameter of strand

12 Dimension of phaseconductor

13. Diameter of neutralconductor

Sq.mm

No.

mm

Sq.mm

No.

mm

mm

mm

Signature of Tenderer : ______________________________

CBL - 3.1 (Page 8 of 15)


9/46

SCHEDULE D

(Contd)


Sl.

No.

14.

15.

Description

Max. D.C. resistance ofphase conductor per 1000metres of completed cableat 20 Deg. C.

Max. D.C. resistance ofneutral conductor per1000 metres of completedcable at 20 Deg. C.

3.5x300 3.5x185 3.5x95 4 x 70 4 x 50 4 x 35 4 x 25Unit



Ohms

Ohms

16. Insulation : Phase/Neutral

a) Material

b) Nominal thickness mm

c) Minimum at any point mm

17. Inner Sheath :

a) Material


Nominal diameter overc) sheath mm

18. Armour :

a) No. of galvanized steelwires

b) Standard to whichmanufactured

c) Diameter of steel wire

d) Name of manufacturer

Max. DC resistance ofe) armour per 1000 Mtrs. of

completed cable at 200C.

Nominal diameter over

Nos.

mm

Ohms

f) armour mm

g) Mass of zinc coating gms/sqm

19. Outer Sheath :

a) Material


20. Overall diameter of cable mm


CBL - 3.1 (Page 9 of 15)


10/46

SCHEDULE D

(Contd)


Sl.

Description UnitNo.

21. Weight of the following :

a) Aluminium conductor

i. Phase Kg/km

ii. Neutral Kg/km

b) Steel wire in armour Kg/km

c) Finished cable Kg/kmMinimum radius of bend

22. round which cable can be Mtrs.laid

23. Nominal drum length Mtrs.

a) Gross weight of

3.5x300 3.5x185 3.5x95 4 x 70 4 x 50 4 x 35 4 x 25



24.

25.

A)

a)

b)

c)

B)

26.

a)

b)

27.

28.

complete drum

b) Nett weight of drumlength

Current carrying capacity perphase :

When laid direct in the

ground 75cm depth soiltemp. 350C, groundresistivity 20c m/w.

One 3-phase circuit pertrench

Two 3-phase circuit pertrench spaced 30 cm.

Three 3-phase circuit pertrench spaced 30 cm.

When laid on racks in air inan ambient temperature of500C.

Assumed max. conductor

temp. for above :

Laid direct in the ground

Laid on racks in air

Short circuit rating at initial

temp. of 900C and final

temp. of 2500C for 1 second

AC or DC voltage test

Kgs.

Kgs.

Amps

Amps

Amps

Amps

Deg.C

Deg.C

KA

KV

29. Spark test KV


CBL - 3.1 (Page 10 of 15)


11/46

SCHEDULE D

TECHNICAL PARTICULARS AND GUARANTEES

600/1000 Volts Single and two core cables with XLPE insulation.

Tenderer to give below the technical particulars of the 600/1000V single and two core cables/wires

offered.

Particulars

Sl. Description Unit 1x630 sq.mm 2x25 sq.mm 2x16 sq.mm

No. Copper Aluminium Copper wire

1. Name & address of Manufacturer

2. Place of manufacture

3. Place of testing

4. Country of origin

5. Type

6. Voltage rating of cable Volt

Standard to which the cable7. conforms

and reference number of standard

8. Cross sectional area of conductor Sq.mm

9. Diameter of conductor mm

Max. D.C. resistance of phase10. conductor for 1000 M of completed Ohmscable at 20

0C

11. Material of insulation

12. Thickness of insulation:

a) Nominal thickness mm

b) Minimum at any point mm

c) Minimum diameter over insulation mm

13. a) Sheath material

b) Thickness mm

14. Armour:

a) No. of galvanized steel wire Nos.

b) Diameter of steel wire mm

c) Diameter over armour mm

d) Mass of zinc coating gms/sqm


CBL - 3.1 (Page 11 of 15)


12/46


13/46

SCHEDULE D

PARTICULARS & GUARANTEES RELATING TO THE CROSS-LINKEDPOLYETHYLENE INSULATING MATERIAL

Sl.No.

1.

2.

3.

a)

b)

4.

5.

6.

a)

b)

7.

8.

Description

Minimum tensile strength at 230C

Minimum elongation at break at 230C

Ageing test (168 Hrs. at 135 + 30C):

Tensile strengthMaximum variation

Elongation at break

Maximum variation in elongation at break

Water absorption test (at 85 + 20C, 336 Hrs) Max.

variation of mass

Minimum volume resistivity at 900C

Hot set test (at 2000C, 15 minutes, 20 N/cm2):

Elongation

Set

Shrinkage test (at 1 Hr. 130 + 30

C)Maximum shrinkage

Insulation resistance constant at 900C

GuaranteedUnit

ParticularsN/sq.mm

%

%

%

mg/cm

Ohm-cm

% max

% max

% max

Mohm-km


CBL - 3.1 (Page 13 of 15)


14/46

SCHEDULE D

PARTICULARS & GUARANTEES RELATING TO PVC OUTER COVERING

Sl.No.

1.

a)

b)

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

a)

Description

Tensile test and elongation at break at 230C:

Minimum tensile strength

Minimum elongation at break

Low temperature bend test temperature at whichspecimen shall not crack

Low temperature elongation test at -150 + 20C.Minimum elongation at break

Low temperature impact test.

Temperature at which specimen shall not crack.

Loss of mass after ageing for 7 days at 100 + 20C.

Maximum loss of mass.

After accelerated ageing for 7 days at 100 + 20CTensile strength after ageing

Minimum value

Maximum variation

Pressure test at 80 + 20C

Maximum indentation

Hot deformation test

Maximum hot deformation

Heat shock testTemperature at which specimen shall not break

Insulation resistance constant K at 200 (Min)

Flame retardance test

Water absorption test 850C, 14 days

Maximum variation of mass

GuaranteedUnitParticulars

N/sq.mm

%

Deg.C

%

Deg.C

mg/cm2

N/mm2

%

%

%

Deg. C

Mohm-km

mg/cm2


CBL - 3.1 (Page 14 of 15)


15/46

SCHEDULE E

DETAILS OF PAST EXPERIENCE OF MANUFACTURER

Name and address of Purchaser

Signature

Quantitysupplied

Year of Remarkssupply

:_________________________

Designation :_________________________

Name of Tenderer ;_________________________

Date :_________________________

CBL - 3.1 (Page 15 of 15)


16/46

SPECIFICATION NO. CBL - 3.2(Revised in March 2010)

11KV CROSS LINKED POLYETHELENE (XLPE) INSULATED CABLES

1. Standard Specification

The cables shall conform and comply with the latest editions of the appropriate IECstandards (IEC 60502, IEC 60811 & IEC 60228 and other relevant IEC standards) orany other equivalent international standards with all its latest addendum andamendments and shall be subject to the approval of the FEWA.

2. Site conditions and fault level

The cables shall be suitable for continuous duty under specified system conditionand under short time fault conditions of system fault level of 500 MVA in the hothumid and salty climate prevailing in the area. The maximum values of humidityand temperature experienced in this country are 100% and 50 deg. C respectively.

3. Scope and nature of work

The specification provides for the design, manufacture, test at manufacturer's works inthe presence of FEWA representatives, suitable packing, transportation and offloading at site of works or FEWA stores in satisfactory conditions and properstacking as directed by FEWA.

4. Construction

The cable shall be either of three core or single core construction made up of highlycompacted stranded conductor of high grade aluminium or copper wires, XLPE

insulated, suitable for use in system with nominal system voltage of 11kv, highestsystem voltage of 12 kV. The materials of conductor and number of cores depends onthe bill of quantities of individual tender documents.

5. Conductor Screening

Conductor screening shall be non-metallic and shall consist of a layer of extrudedsemi-conducting compound, which shall be firmly bonded to the inner surface of theinsulation. The contact of the semi-conducting shields with the cable insulation must beperfect without void creation at the inner surfaces. The interfaces must besmooth in a regular geometric shape and the semi conducting compound must havehomogeneous structure particularly at the interfaces. The semi conducting screen

must be mechanically stable under load cycling of the power.

However provision of additional semi-conducting tape in between semi-conductingcompound and the conductor would be preferred.

6. Insulation

Electrical grade cross linked polyethylene (XLPE) shall be extruded in simultaneousextrusion of conductor screening layer and insulation screening layer and shall besuitably cured.

The nominal thickness of the XLPE insulation shall be 3.4 mm and shall beguaranteed by the manufacturer to withstand the specified system voltages.

CBL - 3.2 (Page 1 of 14)


17/46


18/46

Length of cable on one meter intervals shall be embossed on the outer jacket .with digit size not less than 6 mm Marking on the over sheath shall indicatedcumulative length of the cable, wound on the drum such marking starting with 000 onthe inner end and actual length on the drum.

14. Packing

The cable shall be wound on a suitable non-returnable strong drum to preventdamage during storage and transport. On the side of the drum necessarydescription such as order No., type, voltage, size, material of conductor, gross and netweight of the cable length, direction of rolling and drum number etc. shall be clearlymarked. Completed cable shall be sealed at both ends to avoid any ingress ofmoisture, foreign bodies etc. No drum shall contain more than one length of cable.The diameter of bore for the cable drum for inserting the shaft, shall not be less than120 mm. The cable drums must be closed with wooden planks to prevent cabledamage during storage and transportation.

15. Current Rating and Temperature Rise

The cable shall be capable of withstanding the maximum conductor temperature of 90deg.C in continuous operation and a temperature of 130 deg. C for a limitedperiod. Under fault conditions the cable shall be rated to withstand a finaltemperature of 250 deg. C.

Guaranteed current carrying capacity at 35 deg.C soil temperature and thermalresistivity of filling sand shall be considered 2.0 cm/w and shall be mentioned in theappropriate column of the schedule of guaranteed particulars.

16. Test Certificates

Certified copies of the following type test certificates shall be supplied along with the

offer. If acceptable type test certificates not older than seven years are not enclosedalong with the offer, Authority reserves its right to ask the tenderer to conduct all orany of the following type tests in presence of FEWA representatives at no extra costto FEWA.

Type tests Electrical

(1) Partial discharge test.(2) Bending test plus partial discharge test(3) Power factor (tan delta) measurement as a function of the voltage and

capacitance measurement.(4) Power factor measurement as a function of the temperature.

(5) Heating cycle test plus partial discharge test.(6) Impulse withstand test followed by a power frequency voltage test.(7) High voltage alternating current test.

Type tests non-electrical

(1) All non-electrical type tests shall be carried out as per relevant clause of IEC60502 and IEC 60811.

Routine Test

Routine Tests shall be carried out as per IEC 60502 at manufacturer's works on alllengths of ordered cable during manufacture and the certified copies of these routinetest certificate shall be forwarded to FEWA.

CBL - 3.2 (Page 3 of 14)


19/46

17. Witnessing test at manufacturer's works

The following tests (routine and sample as mentioned in IEC 60502) will be carriedout in presence of at least two FEWA inspectors at the manufacturer's works.

a) Electrical resistance measurement of conductor and metallic screen.

b) Partial discharge test : magnitude of discharge at 11kV should not exceed5 PC.

c) High voltage test : 23kV AC between conductors and screen for 5 minutes.

d) Conductor examination.

e) Check of dimensions.

f) Voltage test for 4 hours : 25kV AC between conductor and screen for 4hours.

g) Hot set test for XLPE insulation.

h) Test on armour wires

i) Measurement of resistance.ii) Measurement of total cross-section.iii) Galvanizing test.iv) Elongation at break point.

The supplier shall make provision in his offer to bear all costs that are incurred incarrying out these tests to the satisfaction of FEWA. However, costs towards travel,accommodation, etc. of FEWA representatives shall not be included in the quoted

price.

18. Cable drum length

The length of cable per drum shall be according to the following table. A variation of+ 5% of the cable drum length may be acceptable.

Cable size Drum length3x300 sq.mm. 500 metres3x185 sq.mm. 500 metres3x 95 sq.mm. 500 metres.1x630 sq.mm. 500 metres.

1x300 sq.mm. 500 metres.

All cable lengths cut and used for various tests shall be to the contractor's accountand shall not be included in the cable lengths to be supplied to FEWA.

CBL - 3.2 (Page 4 of 14)


20/46

SCHEDULE A

SUB-MANUFACTURERS

The Tenderer shall state below the names of the sub-manufacturers to the mainmanufacturer and details of the equipment proposed to be manufactured or supplied by

them:


Signature

Designation

Name of Tenderer

Date


:_________________________

:_________________________

;_________________________

:_________________________

CBL - 3.2 (Page 5 of 14)


21/46

SCHEDULE B




Signature

Designation

Name of Tenderer

Date


:_________________________

:_________________________

;_________________________

:_________________________

CBL - 3.2 (Page 6 of 14)


22/46

SCHEDULE C



note of:

Item

No. Description Precise Details of the Deviations

Signature :_________________________

Designation :_________________________

Name of Tenderer ;_________________________

Date :_________________________

CBL - 3.2 (Page 7 of 14)


23/46

SCHEDULE 'D' - 1

TECHNICAL PARTICULARS & GUARANTEES

11000 VOLT GRADE CROSS LINKED POLYTHELENE FOR

EXTRUDED DRY TYPE CABLE

The Tenderer to give the following technical particulars of the 11000 V grade cables offered for

use at 50 deg.C. ambient temperature and 100% humidity.

Sl. Description Unit Size of cable in sq.mm

No. 3x95 3x185 3x300 1x630 1x300 1x240

1 Name & address of manufacturer

2 Place of manufacture

3 Place of testing

4 Country of origin

5 Voltage rating (phase to phase/phase to ground) KV

6 Standard to which the cable conforms

(Ref. No. of standard)

7 Type of cable

(manufacturer's type and designation)

8 Conductor material

9 Sectional area of conductor :

a) Area sq.mm

b) Strands No.

c) Dia. of individual strand mm

10 Conductor screening :

a) Material

b) Thickness mm

11 Insulation :

a) Material mm


c) Minimum thickness at any point mm

12 Insulation screening :

a) Material

b) Thickness


CBL - 3.2 (Page 8 of 14)


24/46

SCHEDULE 'D' - 1

(Contd..)


No. 3x95 3x185 3x300 1x630 1x300 1x240

13 Metallic screening :

a) Material

b) Total area of cross section sq.mm

c) D.C. resistance Ohm/km

14 Copper tapes :

a) Width mm

b) Thickness mm

c) No. of tapes No.

d) Width of overlapping mm

15 Copper tape binder :

a) Width mm

b) Thickness mm

16 Inner Sheath :

a) Material (As per IEC)

b) Thickness mm

17 Armour :

a) No. of galvanized steel/aluminium wire No.

b) Dia. of steel/aluminium wire mm

c) Total area of cross-section sq.mm

d) Max. D.C resistance per km. ohme) Tensile strength N/sq.mm

f) Galvanizing g/m2

18 Type of termite protection provided

19 Outersheath :

a) Material (As per IEC)

b) Thickness mm

20 Overall diameter of cable mm

21 Max. cond. Temp. at full load Deg.C

22 Max. cond. Temp. at short circuit Deg.C

23 Current carrying capacity per circuit :

a) When laid direct in the ground 100 cm

depth soil temp. 35 deg. C. ground

thermal resistivity 2 deg. M/W

1. One 3 phase circuits per trench Amps

2. Two 3 phase circuits 30 cms. spaced

per trench Amps


CBL - 3.2 (Page 9 of 14)


25/46

SCHEDULE 'D' - 1

(Contd..)

Sl. Description

No.

b) When laid on racks in air at an ambient

temp. at 50 deg. C

24 Assumed max. conductor temp. for 23 above

a) Laid direct in the ground

b) Laid on racks in air

25 Short circuit current rating at an initial temp. of

90 deg. C. and final temp. of 250 deg.C. for

1 sec.

26 Short circuit rating of screen for 1 sec.

27 Weight of the following :

a) Steel wire armour

b) Conductor

c) Copper screen

d) Finished cable

28 Min. radius of bend round which cable

can be laid

29 Nominal drum length

30 Max. DC resistance of conductor per 1000M

of completed cable at 20 deg. C

31 Reactance per 1000M of completed 3 phase

cable at 50 cycles.

32 Max. AC resistance of conductor per 1000M

of completed cable at 90 deg. C.

33 Capacitance per 1000M of completed 3 phase

cable at 50 Hz

34 Impedance of completed 3 phase cable

at 50 Hz.

35 Dielectric loss

Unit Size of cable in sq.mm

3x95 3x185 3x300 1x630 1x300 1x240

Amps

Deg.C

Deg.C

KA

KA

Kg/1000M

Kg/1000M

Kg/1000M

Kg/1000M

Mtrs

Mtrs

Ohms

Ohms

Ohms

uF/km

Ohsm


CBL - 3.2 (Page 10 of 14)


26/46

SCHEDULE 'D' - 1

(Contd..)


No. 3x95 3x185 3x300 1x630 1x300 1x240

36 Max. charging current per conductor for 1000M

of completed cable at normal voltage and

frequency Amps

37 Max. dielectric stress on conductor

38 A.C. Voltage test kv

39 D.C. Voltage test kv


CBL - 3.2 (Page 11 of 14)


27/46

SCHEDULE 'D-2'

PARTICULARS & GUARANTEES RELATING TO THECROSS LINKED POLYTHYLENE INSULATING MATERIAL

Sl. Description Unit GuaranteedNo. Particulars

1 Minimum tensile strength at 23 deg. C. N/sq.mm

2 Minimum elongation at break at 23 deg. C %

3 Ageing test (168 Hrs. at 135 + 3 deg. C)

a) Tensile strength - Max. variation %

b) Elongation at break - Max. variation in elongation at break %

4 Water absorption test (at 85 + 2 deg.C 336 hrs) mg/cm

Max. variation of mass

5 Minimum volume resistivity at 90 deg. C ohm-cm

6 Hot set test (at 200 deg.C. 15 minutes 20 N/cm.sq)

a) Elongation % max

b) Set % max

7 Shrinkage test (@ 1 hr 130 + 3 deg. C) - Max. shrinkage. % max

8 Insulation resistance constant at 90 deg. C. Mohm-km

9 Dielectric power factor as a function of voltage at ambient temp:

a) Maximum tan delta at Uo. x10-4

b) Maximum increment at tan delta between 0.5 Uo to 2 Uo x10-4

10 Dielectric power factor as a function of temp. at 2 KV :

a) Maximum tan delta at ambient temp. x10-4

b) Maximum tan delta at 90 deg. C x10-4

11 Maximum partial discharge at 1.73 Uo PC

Signature of Tenderer : __________________________________________

CBL - 3.2 (Page 12 of 14)


28/46

SCHEDULE 'D-3'

PARTICULARS & GUARANTEES RELATING

P.V.C. OUTER COVERING

Sl. Description Unit Guaranteed

No. Particulars1 Tensile test & elongation at break @ 23 deg. C.

a) Minimum tensile strength N/sq.mm

b) Minimum elongation at break %

2 Low temperature bend test temp. at which specimen shall not

crack. Deg. C

3 Low temperature elongation test @-15 deg + 2 deg. C.

Minimum elongation at break %

4 Low temperature impact testTemperature at which specimen shall not crack Deg. C

5 Loss of mass after ageing for 7 days :

@ 100 + 2 deg. C.

Maximum loss of mass mg/sq.mm

6 After accelerated ageing for 7 days :

@ 100 + 2 deg. C.

a) Tensile strength after ageing

Minimum value N/sq.mm

Maximum variation %

b) Elongation at beak after ageing

Minimum value N/sq.mm

Maximum variation %

7 Pressure test @ 90 + 2 deg. C.

Maximum indentation

8 Hot deformation test - Max. hot deformation %

9 Heat shock testTemperature at which specimen shall not break Deg. C

10 Insulation resistance constant K at 20 deg. (min) Mohm-km

11 Flame retardance test


CBL - 3.2 (Page 13 of 14)


29/46

SCHEDULE E


Name and address Quantity

supplied

Signature

Designation

Name of Tenderer

Date

Year of

supply remarks

:_________________________

:_________________________

;_________________________

:_________________________

CBL - 3.2 (Page 14 of 14)


30/46

SPECIFICATION NO. OHL-1.2

SPECIFICATION FOR ALUMINIUM ALLOY STRANDED CONDUCTORS(Revised in March 2010)

1. Standard Specification:

The conductor shall be constructed and tested to conform and comply with the latesteditions of British Standards BSEN 50182 & 50183.

2. Site Conditions:

The conductor shall be suitable for continuous operation at temperature of 80 deg.C. (30 Deg. C. temperature rise for conductor above ambient temperature) withoutdeterioration in the hot, humid and salt laden dusty climate prevailing in the area.The maximum values of humidity and temperature experienced in this country are100% and 50 deg. C. respectively.

3. Scope and Nature of work:

The specification provides for the design, manufacture, test at manufacturer's works inpresence of FEWA representatives, suitable packing, transporting, offloading at siteof works or FEWA stores in satisfactory condition and proper stacking asdirected by FEWA.

4. Construction & Material:

The conductor shall be constructed of heat-treated aluminium-magnesium-siliconalloy wires and having the mechanical and electrical properties specified in BSEN50182.

5. Standard Values for All Aluminium Alloy wires:

Resistivity:

The standard value of resistivity of all aluminium alloy wire, which shall be used forcalculation only is to be taken as per BSEN 50183.

Density:

At a temperature of 20 deg.C., the density of aluminium alloy wire is to be taken as2.7 gm/cm3.

Coefficient of linear expansion:

The coefficient of linear expansion of aluminium alloy wire is to be taken as 23x10 tothe power minus six per celsius degree.

Constant mass temperature coefficient:

At a temperature of 20 deg.C, the constant mass temp. coeff. of resistance ofaluminium alloy wire measured between two potential points rigidly fixed to the wire, istaken as 0.00360 per Celsius degree.

Modulus of Elasticity:

The modulus of elasticity of aluminium alloy wire is to be taken as 68,000 N/sq.mm.

OHL-1.2 (Page 1 of 10)


31/46

For more accurate calculations, measured values may be used for density, co-efficient of linear expansion, constant mass temperature coefficient and modulus ofelasticity.

6. Stranding:

The Aluminium alloy wires used in the construction of stranded conductor shall,

before stranding, satisfy all the relevant requirements of the specification. The layratio of the different layers shall be within the limits given in the BSEN standards. In allconstruction, the successive layers shall have opposite direction of lay, theoutermost layer being right handed. The wires in each layer shall be evenly andclosely stranded. In aluminium alloy stranded conductors having multiple layers ofwires, the lay ratio of any layer shall not be greater than the lay ratio of the layerimmediately beneath it. The completed conductor shall be free from dirt, grit,excessive amounts of drawing oil and other foreign deposits.

7. Joints in Wires:

There shall be no joints in any wires of a stranded conductor containing seven wires,except those made in the base rod or wire before final drawing. In strandedconductors containing more than seven wires, joints in individual wires are permitted inany layer except the outermost layer, but no two such joints shall be less than 15mapart in the complete stranded conductor. Such joints shall be made byresistance butt-welding and shall subsequent to welding, be annealed over adistance of 200mm on each side of the joint.

8. Conductor sizes:

The nominal aluminium area of the conductor shall be as specified in the Bill ofQuantities and may be either 100 sq.mm, 150 sq.mm, 175 sq.mm, 300 sq.mm or 400sq.mm by which they will be identified.

9. Area of conductor:

The sectional area of aluminium alloy stranded conductor is the sum of the crosssectional areas of individual wires. The sectional area of aluminium alloy conductorshall be higher than nominal aluminium area of conductor and for 400 sq.mmconductor, it should not be less than 479 sq.mm, for 300 sq.mm conductor, it shouldnot be less than 362.1 sq.mm, for 175 sq.mm conductor, it should not be less than211 sq. mm, for 150 sq.mm conductor, it should not be less than 180.7 and for 100sq.mm it should not be less than 118.9 sq.mm.

10. Conductor d.c. resistance at 20 deg.C.:

For 100 sq.mm conductor, the d.c. resistance at 20 deg.C. shall not exceed 0.2767ohm/km.For 150 sq.mm conductor, the d.c. resistance at 20 deg.C. shall not exceed 0.183ohm/km.For 175 sq.mm conductor, the d.c. resistance at 20 deg.C. shall not exceed 0.1568ohm/km.For 300 sq.mm conductor, the d.c. resistance at 20 deg. C shall not exceed 0.0917ohm/km.For 400 sq.mm conductor, the d.c. resistance at 200C shall not exceed 0.06930ohm/km.

11. Ultimate breaking load:

For 100 sq.mm conductor the ultimate breaking load shall be not less than 35.0 KN.For 150 sq.mm conductor the ultimate breaking load shall be not less than 53.3 KN.For 175 sq.mm conductor the ultimate breaking load shall be not less than 62.24 KN.For 300 sq.mm conductor the ultimate breaking load shall be not less than 106.82 KN.For 400 sq.mm conductor the ultimate breaking load shall be not less than 141.3 KN.



32/46

12. Weight:

For 100 sq.mm, 150 sq.mm, 175 sq.mm, 300 sq.mm & 400 sq.mm conductors the nominalweights shall be 325 kg/km, 496 kg/km, 580 kg/km, 998 kg/km & 1320 kg/km respectively.

13. Conductor current carrying capacity:

In determining continuous thermal current carrying capacity of conductor thefollowing parameters shall be used.

(a) Ambient temperature : 50 deg.C.(b) Cross wind velocity : 0.6 metre/sec(c) Solar radiation : 1200 watt/m2(d) Solar absorption coefficient : half black(e) Emissivity of conductor : half black(f) Temperature rise of conductor above ambient temperature : 30 deg.C.

14. Packing:

The conductor shall be packed in non returnable drums (steel drums for 400 sq.mmconductors) and the length of conductor shall be 2000 metres for 100, 150,175 and 300sq.mm conductors and 3000 metres for 400 sq.mm conductor with the variation limit of+ or - 5%. The conductor shall be shipped on drums and lapped with protectivecovering across the whole width of the drum, band wooden battens nailed to theflange. All drums with conductor shall have a layer of waterproof wax paper orplastic sheet, which must be safe against chemical reactions, around the barrelunder the conductor and another over the conductor.

The following informations shall be clearly marked in indelible paint on both flanges ofeach drum besides the general information.

- Order number/Contract number- Type and size of conductor- Exact length- Net/gross weight- Drum number- Trade mark- Direction of rolling- Property of FEWA, UAE- Year of manufacture- Manufacturer's name & address

15. Testing at Manufacturer's works:

The conductor shall be subjected to all type, special and routine tests in accordancewith relevant BSS and IEC recommendation. Certified copies of the type and specialtest reports shall be supplied along with the offer. Routine tests shall be carried outin presence of FEWA representatives at the manufacturer's works. The suppliershall make provision in his offer to bear all the costs that are incurred in carrying outthese tests to the satisfaction of FEWA. However, costs towards travel,accommodation etc. of FEWA representatives shall not be included in the quotedprice.



33/46

SCHEDULE A

SUB-MANUFACTURERS

The Tenderer shall state below the names of the sub-manufacturers to the mainmanufacturer and details of the equipment proposed to be manufactured or supplied by

them:


Signature

Designation

Name of Tenderer

Date


:_________________________

:_________________________

;_________________________

:_________________________



34/46

SCHEDULE B




Signature

Designation

Name of Tenderer

Date


:_________________________

:_________________________

;_________________________

:_________________________



35/46

SCHEDULE C



note of:

ItemNo. Description Precise Details of the Deviations

Signature :_________________________

Designation :_________________________

Name of Tenderer ;_________________________

Date :_________________________



36/46

SCHEDULE D

TECHNICAL PARTICULARS & GUARANTEES FOR STRANDEDALL ALUMINIUM ALLOY CONDUCTOR

SL.NO.

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

ITEM UNIT PARTICULARS

Manufacturers name and address

Applicable standards

Conductor code name

Purity of Aluminium

Total cross sectional area Sq.mm

No. & Dia. of strands No/mm

No. of aluminium alloy strand centre

1stLayer No.

2ndlayer No.

3rdlayer No.

4thlayer No.

Lay Ratio

Overall diameter of conductor mm

Tolerance on diameter

Guaranteed ultimate breaking strength KN

Standard mass of conductor Kg/Km

Resistance Ohm/Km

Co-efficient of liner expansion Per Deg.C

Equivalent modules of elasticity(Average value from actual stress strain curve) N/mm2

Signature of Tenderer : _______________________



37/46


38/46

SCHEDULE D

SL.

NO. ITEM UNIT PARTICULARS2. AC Resistance

a) at 20 Dec. C Ohm/km

b) at 27 Deg. C Ohm/km

c) at 50 Deg. C Ohm/km

d) at 65 Deg. C Ohm/km

e) at 85 Deg. C Ohm/km

f) at 100 Deg. C Ohm/km

3. Curves showing continuous current carryingcapacity of conductor at various temperature

rises in still air and in wind of velocity0.6m/sec.

4. Reduction in ultimate tensile strength forcontinuous conductor temperature 10 Deg. Chigher than that recommended by themanufacturer.

5. Curves showing 3 secs. current rating forvarious conductor temperatures.

Signature :

Designation :

Name of Tenderer :

Date :



39/46


40/46

SPECIFICATION NO. EA-8.1

SPECIFICATION FOR EARTH CONDUCTORS(January 2006)

1. Standard Specification:

The conductor shall be constructed and tested to conform and comply with the latesteditions of British Standard (B.S) 6360, equivalent IEC standards or any otherequivalent international standard which shall be subject to the approval of FEWA.

2. Site Conditions:

The maximum values of humidity and temperature experienced in this country are100% and 50 deg. C. respectively.

3. Scope and Nature of work:

The specification provides for the design, manufacture, test at manufacturer's works inpresence of FEWA representatives, suitable packing, transporting, offloading at site ofworks or FEWA stores in satisfactory condition and proper stacking as directed byFEWA.

4. Construction & Material:

The earth conductor shall be constructed of soft drawn high conductivity strandedbare copper conductor having the mechanical and electrical properties specified in BS6360 or equivalent. The area of cross section of earth conductor shall be 70 sq.mm.

5. Resistance

The maximum value of resistance of 70 sq.mm earth conductor shall be 0.271 ohms perKM at 200C.

6. Stranding:

The soft drawn copper wires used in the construction of stranded conductor shall,before stranding, satisfy all the relevant requirements of the specification. The lay ratio ofthe different layers shall be within the limits given in the BS/IEC standardspecification. In all construction, the successive layers shall have opposite direction oflay, the outermost layer being right handed. The wires in each layer shall be evenlyand closely stranded. Stranded conductor having multiple layers of wires, the lay ratio of

any layer shall not be greater than the lay ratio of the layer immediately beneath it. Thecompleted conductor shall be free from dirt, grit, excessive amounts of drawing oil andother foreign deposits.

7. Joints in Wires:

There shall be no joints in any wires of a stranded conductor except those made in thebase rod or wire before final drawing. In stranded conductors containing more thanseven wires, joints in individual wires are permitted in any layer except the outermostlayer, but no two such joints shall be less than 15m apart in the complete strandedconductor.

A-8.1 (4) sm

Page 1 of 7


41/46

8. Conductor sizes:

The nominal area of copper conductor shall be 70 sq.mm with 19 strands, each strandhaving diameter of 2.14 mm.

9. Packing:

The conductor shall be packed in a drum with protective covering across the wholewidth and length of the conductor in each drum shall be 500 M exact without anytolerance.

The following informations shall be clearly marked in indelible paint on both flanges ofeach drum besides the general information.

- Type and size of conductor- Exact length- Net/gross weight- Drum number

- Trade mark- Direction of rolling- Property of FEWA, UAE- Year of manufacture- Manufacturer's name & address

10. Testing at Manufacturer's works:

The conductor shall be subjected to all type, special and routine tests in accordancewith relevant BSS and IEC recommendation. Certified copies of the type and specialtest reports shall be supplied along with the offer. Routine tests shall be carried out inpresence of FEWA representatives at the manufacturer's works. The supplier shallmake provision in his offer to bear all the costs that are incurred in carrying out these

tests to the satisfaction of FEWA. However, costs towards travel, accommodation etc. ofFEWA representatives shall not be included in the quoted price.

EA-8.1

sm

A-8.1 (4) sm

Page 2 of 7


42/46

SCHEDULE A

SUB-MANUFACTURERS

The Tenderer shall state below the names of the sub-manufacturers to the mainmanufacturer and details of the equipment proposed to be manufactured or supplied bythem:


Signature

Designation

Name of Tenderer

Date

A-8.1 (4) sm


:_________________________

:_________________________

;_________________________

:_________________________

Page 3 of 7


43/46

SCHEDULE B




Signature

Designation

Name of Tenderer

Date

A-8.1 (4) sm


:_________________________

:_________________________

;_________________________

:_________________________

Page 4 of 7


44/46

SCHEDULE C


The Tenderer to state in the following schedule the deviations from the tender specificationsproposed in his offer. Deviations other than those specifically listed below will not be takennote of:

Item

No. Description Precise Details of the Deviations

Signature :_________________________

Designation :_________________________

Name of Tenderer ;_________________________

Date :_________________________

A-8.1 (4) sm

Page 5 of 7


45/46

SCHEDULE D

TECHNICAL PARTICULARS & GUARANTEES FOR STRANDED CONDUCTORS

Tenderer is to give the following particulars of soft drawn copper conductors.

S.NO. DESCRIPTION UNIT PARTICULARS

1. Name of Manufacturer

2. Country of Origin

3. Applicable standard

4. Cross sectional area of the conductor sq.mm

5. Diameter of the conductor mm

6. Number of strands No.

7. Diameter of each strand mm

8. Resistance of conductor per KM at 200C Ohms

9. Conductivity of copper

10. Lay ratio

11. Minimum tensile strength of each strand Kgf

12. Length of conductor in each drum Meter 500

Signature :_________________________

Designation :_________________________

Name of Tenderer ;_________________________

Date :_________________________

A-8.1 (4) sm

Page 6 of 7


46/46

SCHEDULE E


Name and address Quantitysupplied

Signature

Designation

Name of Tenderer

Date

Year ofsupply Remarks

:_________________________

:_________________________

;_________________________

:

fewa lv cable specs

Documents