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Data Sheet

Polycab manufactures voltage grade cables according to various standards, with specific installation conditions including maximum conductor temperatures and thermal resistivity of soil. The document outlines depth of laying for cables, group rating factors for single-core and multi-core cables, and provides detailed specifications for different types of cables including their dimensions and current carrying capacities. Additionally, it includes tables for reactance and current carrying capacity in different environments.

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Atharva Ghogare
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16 views12 pages

Data Sheet

Polycab manufactures voltage grade cables according to various standards, with specific installation conditions including maximum conductor temperatures and thermal resistivity of soil. The document outlines depth of laying for cables, group rating factors for single-core and multi-core cables, and provides detailed specifications for different types of cables including their dimensions and current carrying capacities. Additionally, it includes tables for reactance and current carrying capacity in different environments.

Uploaded by

Atharva Ghogare
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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Polycab manufactures following voltage grade cables as per IS-7098[Part-2],

IEC-60502 Part-2 and BS-6622 & BS:7835

Basic assumptions and conditions of installation :


1) Maximum Conductor Temperature: 90° C
2) Ambient Ground Temperature : 30° C
3) Ambient Air Temperature : 40° C
4) Thermal resistivity of soil : 150° C.Cm/W

Depth of laying (to the highest point of the cable laid direct in the ground)
22 and 33kV Cables : 105 cm
Max. Conductor temperature at the end of a short circuit:250° C

B). FOR DEPTH OF LAYING (CABLES LAID DIRECT IN THE GROUND)

Depth of laying (cm) 22kV & 33kV all Size


90 _
105 1
120 0.99
150 0.97
180 or more 0.96

C). FOR VARIATION IN THERMAL RESISTIVITY OF SOIL

Thermal Resistivity of soil 100 150 200


Factor 1.2 1.0 0.89

GROUP RATING FACTORS FOR SINGLE-CORE CABLES

B). Cables laid on Racks / Trays in covered trench with removable covers where air circulation is restricted, Trefoils are separat

No. racks/trays in tier No of Trefoils in Horizontal Formation


1 3
1 0.95 0.88
2 0.90 0.83
3 0.88 0.81
4 0.86 0.79

FOR MULTI-CORE CABLES


restricted. The cables spaced by one cable diameter and trays are in tiers spaced by 300 mm.The clearance
between the wall and the cable is 25 mm.

No. of cables trays in tier No. of Cables


1 3 6
1 0.95 0.88 0.85
2 0.90 0.83 0.81
3 0.88 0.81 0.79
6 0.86 0.79 0.77
B) Cable laid on cable trays exposed to air , the cables spaced by one cable diameter and trays are in
tiers spaced by 300 mm. The clearance of the cable from the wall is 25 mm.

No. of cable trays in tier No. of cables


1 3 6
1 1 0.96 0.93
2 1 0.93 0.90
3 1 0.92 0.89
6 1 0.90 0.87
C) Cables laid on cable trays exposed to air, the cables touching and trays are in tiers spaced by 300 mm.
The clearance between the wall and the cable is 25 mm.

No. of cables trays No. of cables per tray


1 3 6
1 1 0.80 0.75
2 1 0.76 0.71
3 1 0.74 0.70
6 1 0.72 0.68

D) Cables laid direct in ground in horizontal formation

No. of cables in group Distance of cables


Touching 30mm 45mm
2 0.79 0.87 0.90
3 0.69 0.79 0.83
4 0.62 0.74 0.79
5 0.58 0.72 0.76
6 0.54 0.69 0.75

TABLE 16 - 19
“POLYCAB” / 33 KV
SINGLE (E) HT
CORE XLPE SINGLE
COPPER CORE COPPER
CONDUCTOR, CONDUCTOR
XLPE INSULATED, CABLES
UNARMOURED & ARMOURED CABLES CONFORMING
TO IS: 7098 PART-2/1985:

UNARMOURED CABLE ALUMINIUM STRIP ARMOURED CABLE


Nominal
Nominal Approx. Approx.
Thickness Approx.
Size of Overall Overall
of XLPE Weight of
Conductor Diameter of Diameter
Insulation Cable
Cable of Cable
Sq.mm mm mm Kg/Km mm
95 8.8 37.5 2000 39.0
120 8.8 39.0 2300 41.0
150 8.8 40.0 2600 42.0
185 8.8 43.0 3050 44.5
240 8.8 45.0 3650 47.0
300 8.8 48.0 4350 49.0
400 8.8 51.0 5350 52.5
500 8.8 54.0 6450 56.0
630 8.8 57.5 7000 60.0
800 8.8 62.0 9550 64.0
1000 8.8 67.0 11600 69.0

TABLE 17 - 33
“POLYCAB” / 33 KV
SINGLE (UE)ALUMINIUM
CORE HT XLPE SINGLE CORE ALUMINIUM
CONDUCTOR, CONDUCTOR
XLPE INSULATED, CABLE
UNARMOURED & ARMOURED CABLES CONFORMING
TO IS: 7098 PART-2/1985:

UNARMOURED CABLE ALUMINIUM STRIP ARMOURED CABLE


Nominal
Nominal Approx. Approx.
Thickness Approx.
Size of Overall Overall
of XLPE Weight of
Conductor Diameter of Diameter
Insulation Cable
Cable of Cable
Sq.mm mm mm Kg/Km mm
120 9.5 40 1700 42
150 9.5 41.5 1900 43.5
185 9.5 43.5 2100 45
240 9.5 46 2350 48
300 9.5 48.5 2650 50
400 9.5 51 3100 53.5
500 9.5 54.5 3600 56.5
630 9.5 58 4200 60
800 9.5 62 4850 64
1000 9.5 67 5700 69

TABLE 29 - 19
“POLYCAB” / 33 KV
THREE (E) ALUMINIUM
CORE HT XLPE THREE CORE ALUMINIUM
CONDUCTOR, CONDUCTOR
XLPE INSULATED, CABLES
UNARMOURED & ARMOURED CABLES CONFORMING
TO IS: 7098 PART-2/1985:

UNARMOURED CABLE FORMED WIRE / STRIP ARMOURED CABLE


Nominal
Nominal Approx. Approx.
Thickness Approx.
Size of Overall Overall
of XLPE Weight of
Conductor Diameter of Diameter
Insulation Cable
Cable of Cable
Sq.mm mm mm Kg/Km mm
185 8.8 90.5 8150 90.0
240 8.8 95.5 9150 95.5
300 8.8 100.5 10200 100.0
400 8.8 106.5 11800 106.5

TABLE 30 - 19
“POLYCAB” / 33 KV
THREE (E) COPPER
CORE HT XLPE CONDUCTOR,
THREE CORE COPPER CONDUCTOR
XLPE INSULATED, CABLES
UNARMOURED & ARMOURED CABLES CONFORMING
TO IS: 7098 PART-2/1985:

UNARMOURED CABLE FORMED WIRE / STRIP ARMOURED CABLE


Nominal
Nominal Approx. Approx.
Thickness Approx.
Size of Overall Overall
of XLPE Weight of
Conductor Diameter of Diameter
Insulation Cable
Cable of Cable
Sq.mm mm mm Kg/Km mm
185 8.8 90.5 11600 90.0
240 8.8 95.5 13600 95.5
300 8.8 100.0 15750 100.0
400 8.8 106.5 19250 106.5

TABLE 31 - 33
“POLYCAB” / 33 KV
THREE (UE)
CORE HT XLPE THREE
ALUMINIUM CORE ALUMINIUM
CONDUCTOR, CONDUCTOR
XLPE INSULATED, CABLES & ARMOURED CABLES CONFORMING
UNARMOURED
TO IS: 7098 PART-2/1985:

UNARMOURED CABLE FORMED WIRE / STRIP ARMOURED CABLE


Nominal
Nominal Approx. Approx.
Thickness Approx.
Size of Overall Overall
of XLPE Weight of
Conductor Diameter of Diameter
Insulation Cable
Cable of Cable
Sq.mm mm mm Kg/Km mm
185 9.5 95.5 8950 95.5
240 9.5 100.5 10000 100.5
300 9.5 105 11050 105
400 9.5 111.5 12750 111.5

Table - 5 REACTANCE
Approximate Reactance At 50 Hz( Ohms/km) For Single Core Cables

Size Voltage Grade(kV)


19/33 33/33
Arm Un-Arm Arm Un-Arm
185 0.124 0.115 0.128 0.122
240 0.118 0.110 0.124 0.118
300 0.112 0.105 0.120 0.114
400 0.119 0.102 0.115 0.109
500 0.105 0.096 0.108 0.103
800 0.097 0.092 0.106 0.099
1000 0.096 0.090 0.102 0.096
ation is restricted, Trefoils are separated by two cable diameter horizontally and the trays are in tiers having 300 mm distance.

mm.The clearance
trays are in

ced by 300 mm.

MOURED CABLES CONFORMING

UM STRIP ARMOURED CABLE ALUMINIUM ROUND WIRE ARMOURED CABLE CURRENT CARRYING CAPACITY
Approx.
Approx. Approx. In
Overall In Duct In Air at
Weight of Weight of Ground
Diameter at 30° C. 40° C.
Cable Cable at 30° C.
of Cable
Kg/Km mm Kg/Km Amps. Amps. Amps.
2200 41.5 2550 265 230 345
2550 43.0 2800 300 260 400
2850 44.5 3100 330 290 450
3300 47.0 3650 375 325 510
4000 49.5 4250 430 370 600
4600 52.0 4950 480 415 690
5700 55.0 6050 540 465 790
6800 60.0 7350 600 520 910
8200 63.0 8800 660 570 1020
10000 67.0 10600 720 620 1140
12100 72.5 12750 760 660 1240

ARMOURED CABLES CONFORMING

UM STRIP ARMOURED CABLE ALUMINIUM ROUND WIRE ARMOURED CABLE CURRENT CARRYING CAPACITY
Approx.
Approx. Approx. In
Overall In Duct In Air at
Weight of Weight of Ground
Diameter at 30° C. 40° C.
Cable Cable at 30° C.
of Cable
Kg/Km mm Kg/Km Amps. Amps. Amps.
2000 45.5 2250 230 200 310
2150 47.5 2500 260 225 350
2400 49.5 2700 290 255 400
2700 53.0 3200 335 290 470
3000 55.0 3500 380 325 540
3450 58.5 4000 430 370 630
3950 62.0 4550 485 420 730
4550 65.5 5200 550 470 840
5300 71.0 6200 610 520 950
6250 76.0 7250 660 560 1060

ARMOURED CABLES CONFORMING

WIRE / STRIP ARMOURED CABLE ALUMINIUM ROUND WIRE ARMOURED CABLE CURRENT CARRYING CAPACITY
Approx.
Approx. Approx. In
Overall In Duct In Air at
Weight of Weight of Ground
Diameter at 30° C. 40° C.
Cable Cable at 30° C.
of Cable
Kg/Km mm Kg/Km Amps. Amps. Amps.
9250 96.5 13900 270 240 340
10300 101.0 15150 310 275 400
11350 105.5 16450 350 310 455
13100 112.5 18550 395 355 530

MOURED CABLES CONFORMING

WIRE / STRIP ARMOURED CABLE ALUMINIUM ROUND WIRE ARMOURED CABLE CURRENT CARRYING CAPACITY
Approx.
Approx. Approx. In
Overall In Duct In Air at
Weight of Weight of Ground
Diameter at 30° C. 40° C.
Cable Cable at 30° C.
of Cable
Kg/Km mm Kg/Km Amps. Amps. Amps.
12700 96.5 17300 345 305 435
14750 101.0 19600 395 350 510
16950 105.5 22000 440 390 580
20550 112.5 26000 495 440 660

ARMOURED CABLES CONFORMING

WIRE / STRIP ARMOURED CABLE ALUMINIUM ROUND WIRE ARMOURED CABLE CURRENT CARRYING CAPACITY
Approx.
Approx. Approx. In
Overall In Duct In Air at
Weight of Weight of Ground
Diameter at 30° C. 40° C.
Cable Cable at 30° C.
of Cable
Kg/Km mm Kg/Km Amps. Amps. Amps.
10100 101 14550 270 240 340
11200 106 15850 310 275 400
12300 110.5 17300 350 310 455
14100 117 19350 395 355 530

Approximate Reactance At 50 Hz ( Ohms/km) For Three Core Cables

Size Voltage Grade(kV)


19/33 33/33

185 0.110 0.116


240 0.105 0.112
300 0.100 0.108
400 0.097 0.103
00 mm distance.
*Normal
Delivery
Length

Mtrs.
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*Normal
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*Normal
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*Normal
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200
200

*Normal
Delivery
Length

Mtrs.
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250

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