Special Cables
Thermocouple Extension / Compensating Cables
These thermocouple cables can also be termed as
instrumentation cables, since they are used for process temperature
measurement. The construction is similar to pair instrumentation cable but
the conductor material is different. Thermocouples are used in processes to
sense temperature and is connected to the pyrometers for indication and
control. The thermocouple and pyrometer are electrically conducted by
thermocouple extension cables / thermocouple compensating cables. The
conductors used for these thermocouple cables are required to have similar
thermo-electric (emf) properties as that of the thermocouple used for
sensing the temperature. These thermocouple cables are manufactured as per
IS:8784, ANSI-MC 96, 1, B.S., ENI, DIN and customers specification.
Range of Thermocouple Extension / Compensation
Cables
| Extension Cables |
Conductor Material |
| Positive |
Negative |
KX (NiCr/Nia)
JX (Fe/CuNi)
EX (NiCr/CuNi)
TX (Cu/CuNi) |
Chromel
Iron
Chromel
Copper |
Alumel
Constantan
Constantan
Constantan |
| Compensating Cables |
KX(A)/VX(NiCr/NiaL)
SX/RX (PtRh-Pt) |
Copper
Copper |
Constantan
Constantan |
Colour Codes as per various Standard Specifications
| Standards Referred |
|
+ve |
-ve |
Overall |
+ve |
-ve |
Overall |
+ve |
-ve |
Overall |
| Extension Cables |
| KX |
Yellow |
Red |
Yellow |
Red |
Green |
Green |
Brown |
Blue |
Red |
| JX |
White |
Red |
Black |
Red |
Blue |
Blue |
Yellow |
Blue |
Black |
| TX |
Blue |
Red |
Blue |
Red |
Black |
Black |
White |
Blue |
Blue |
| EX |
Purple |
Red |
Purple |
Red |
Violet |
Violet |
Brown |
Blue |
Brown |
| Compensating Cables |
| KX(A)/VX |
- |
- |
- |
Red |
Green |
Green |
White |
Blue |
Red |
| SX/RX |
|
Black |
Red |
Red |
White |
White |
White |
Blue |
Green |
Grid FRLS and Halogen Free Cables
| Test |
Function |
Specification |
Typical Values of FRLS Compound |
Typical Values of Halogen free Compound |
Typical values of ordinary PVC Compound |
| Critical Oxygen Index |
To determine Percentage of Oxygen
required for supporting combustion of insulating material at room
temperature |
ASTM-d-2863 |
More than 29% |
More than 29% |
23% |
| Temperature Index |
To determine at what temperature normal
oxygen content of 21% in air will support combustion of insulating
material |
ASTM-D-2863 & BICC Handbook Chapter
No. 6 |
More than 250°C |
More than 250°C |
150°C |
| Smoke Density Rating (Light
Transmission) |
To determine the visibility (Light
Transmission) under Fire of Insulating Material |
ASTM-D-2843 |
More than 40% |
More than 80% |
10-15% |
| Acid Gas Gas Generation |
To ascertain the amount of Hydrochloric
Acid Gas evolved from insulation of Cables under fire. |
IEC-754-I |
Less than 20% |
Less than 0.5% |
45-50% |
Following additional test is offered on these cables :-
- Flammability Test
a) IEEE383
b) IEC 332(Part-I)
c) IEC-332 (Part-III)
- Swedish Chimney Test
a) SS 4241475
Shielded Cables (MultiCore Flexible Shielded
Cables)
Shielded Cables (Multi Core Flexible Shielded Cables)
in gray, black and white colour is available with us. These cables are used
to interconnect electrical measuring devices with instrument panel for
measuring in engineering plants and in areas where signal transmission is
distorted by electrical interference fields. Available in standard these
Shielded Cables are also custom manufactured as per client's requirement.
Technical Specification
| Core Colours |
Up to 4 colour Black with white numbering +
yellow/green |
| Sheath Colour |
Grey, Black and White |
| Conductor |
Annealed Bare Copper as per IS 8130 |
| Insulating PVC |
Type A conforming to Is 5831 |
| Shield |
Aluminum Mylar tape is wrapped, over all laid up
cores along with annealed tinned copper drain wire. In case of multi
pairs/triad is wrapped with Aluminium Maylortape alongwith drain wire
and identification of pair/triad is done by numbered black core. |
| PVC Sheath |
Type ST-1 Conforming to IS 5831 HR, FR and FRLS
sheathing can be provided as per requirement. |
| Rated Voltage |
300 / 500 V |
| Test Voltage |
1000 VAC. For 1 minutes. |
| Min. Bending Radius |
16 times the overall diameter of cable |
| Tensile Strength |
12.50 N per Sq. mm of PVC insulation and sheath. |
| Max. Working Temperature |
70° C, also available for 85° C and 105°
C as per requirement. |
| Max. Short Circuit Temperature |
160° C |
| Minimum Laying Temperature |
-15° C |
| Use |
Is suitable for interconnection of electrical
measuring devices to instrument panel or instrument. Measuring,
monitoring and control in machine tool manufacturing, in plant
engineering, in all places where electrical interference fields can
distort a signal transmission or where interference pulses arising in
the mains must be confined. |
| Sr. No. |
No. Of Core Cross sec. Sq.. mm. |
Dia Of Conductor Strands mm |
Finished Cable Dia mm(Nom.) |
Approx. Weight Kg/Km |
Max. D.C Resistance at 20 C
(Ohm/km) |
| 1 |
1 x 2 x 0.5 |
0.2 |
7.5 |
80 |
39 |
| 2 |
2 x 2 x 0.5 |
0.2 |
10.2 |
142 |
39 |
| 3 |
4 X 2 X 0.5 |
0.2 |
11 |
175 |
39 |
| 4 |
5x2x0.5 |
0.2 |
12.6 |
232 |
39 |
| 5 |
8x2x0.5 |
0.2 |
13.8 |
283 |
39 |
| 6 |
10x2x0.5 |
0.2 |
14.6 |
323 |
39 |
| 7 |
12x2x0.5 |
0.2 |
15.7 |
374 |
39 |
| 8 |
16x2x0.5 |
0.2 |
17.5 |
470 |
39 |
| 9 |
20x2x0.5 |
0.2 |
18.5 |
538 |
39 |
| 1 |
1 x 2 x 0.75 |
0.2 |
7.9 |
91 |
26 |
| 2 |
2x2x0.75 |
0.2 |
10.6 |
158 |
26 |
| 3 |
4x2x0.75 |
0.2 |
11.7 |
206 |
26 |
| 5 |
8x2x0.75 |
0.2 |
14.6 |
334 |
26 |
| 6 |
10x2x0.75 |
0.2 |
15.8 |
396 |
26 |
| 7 |
12x2x0.75 |
0.2 |
17 |
462 |
26 |
| 8 |
16x2x0.75 |
0.2 |
19 |
585 |
26 |
| 9 |
20x2x0.75 |
0.2 |
21.5 |
741 |
26 |
| 1 |
1 x 2x1.5 |
0.25 |
8.8 |
127 |
13.3 |
| 2 |
2x2x1.5 |
0.25 |
11.7 |
223 |
13.3 |
| 3 |
4x2x1.5 |
0.25 |
13.5 |
333 |
13.3 |
| 4 |
6x2x1.5 |
0.25 |
16 |
475 |
13.3 |
| 5 |
8x2x0.5 |
0.25 |
6.8 |
563 |
13.3 |
| 6 |
12x2x .5 |
0.25 |
19.3 |
782 |
13.3 |
| 7 |
16x2x1.5 |
0.25 |
22 |
1025 |
13.3 |
| 8 |
24x2x1.5 |
0.25 |
26.5 |
1506 |
13.3 |
House Wires
We offer Single Core house wires with PVC/HR PVC
/ FRLS / ZHFR Insulated Copper Conductor. These are Unsheathed House Wires
in Voltage Grade upto and including 1100 Volts as per IS:694-1990.
Technical Specification
| Nominal Cross Section Area of
Conductor Sq.mm |
Number / Nom. Dia of wires * (Nom.)
Number / mm |
Thickness of insulation (Nom.) mm |
Overall diameter Max. mm |
Current carrying capacity in conduit
/ trunking (Amps) |
Resistance (Max.) at 20°C Ohm /
Km |
| PVC |
HR PVC |
FRLS |
ZHFR |
| 0.75 |
24/0.20 |
0.60 |
2.8 |
7 |
8 |
7 |
8 |
26.00 |
| 1.00 |
14/0.30 |
0.70 |
3.2 |
11 |
13 |
11 |
13 |
18.10 |
| 1.50 |
22/0.30 |
0.70 |
3.4 |
13 |
16 |
13 |
16 |
12.10 |
| 2.50 |
36/0.30 |
0.80 |
4.2 |
18 |
20 |
18 |
20 |
7.41 |
| 4.00 |
56/0.30 |
0.80 |
4.8 |
24 |
26 |
24 |
26 |
4.95 |
| 6.00 |
84/0.30 |
0.80 |
5.6 |
31 |
36 |
31 |
36 |
3.30 |
Comparative Properties of Grid Wires
| Feature |
Normal PVC Wire |
Heat Resistant HR PVC |
Fire Retardant FR-PVC |
Fire Retardant Low Smoke FRLS |
Zero Halogen Low Smoke |
| Insulation material |
PVC |
PVC |
Spl. PVC |
Spl. PVC |
Spl. Polymer |
| Insulation property |
Normal |
Good |
Good |
Good |
Very Good |
| Temperature rating |
70°C |
85°C |
70°C |
70°C |
85°C |
| Thermal stability |
Normal |
Very good |
Good |
Good |
Very Good |
| Flame retardancy |
Good |
Good |
Very good |
Very good |
Excellent |
| Safety during burning |
Average |
Average |
Good |
Good |
Excellent |
| Requirement of Oxygen to Catch Fire (% in air) |
>21 |
>21 |
>30 |
>30 |
>35 |
| Temperature required to catch fire (with 21% oxygen) |
Room temp. |
Room temp. |
>250°C |
>250°C |
>300°C |
| Visibility during cable burning (%) |
<20 |
<20 |
<35 |
>40 |
>80 |
| Release of halogen Gas during burning (% by weight) |
<20 |
<20 |
<20 |
<20 |
Zero |
| Abrasion Resistance during installation |
Good |
Good |
Good |
Good |
Good |
Conductor
We offer conductors for usage across medium & low
voltage applications. These are corrosion resistant conductors exhibiting
excellent resistance in sea coast and polluted industrial areas. These are
accurately hardened on surface for reducing the damage to surface during
handling. They have higher Strength to Weight Ratio thus every economical as
it reduces the overall cost involved in transmission lines.
- Lower Power Losses : since AAC is homogeneous (with all strands of
Aluminium Alloy) with no steel component, the resistance of AAAC is
lower as compared to that of ACSR.
- Higher Ampacity : AAAC can carry at least 15-20% extra current as
compared to ACSR of equal size.
- Longer Life : Experience in foreign countries shows that all
Aluminium Alloy Conductors are in service for over 60 years, which is
about double the life of ACSR conductors.
- Surface Hardness : The surface hardness of AAAC is 80 BHN as compared
to 35BHN of ACSR. This reduces damage to surface during handling and
therefore leading to lesser corona losses and radio interference at EHV.
- Thermal Stability : AAA Conductors are stable upto 90�C
against ACSR conductors which are stable upto 75�C.
- Higher Strength to Weight Ratio : Since AAAC has higher strength to
weight ratio, span car be increased from 2 to 15% resulting in overall
reduction of cost in tower / supports and other accessories in
transmission lines system.
All Aluminium Alloy Conductors
(Clauses 7.2.1 & 7.2.2) as per IS-398 (Part
4) - 1994
| Actual area mm2 |
Stranding & wire dia mm |
Approx. Overall Dia mm |
Approx Mass kg/km |
Calculated maximum resistance at
20°C Ohms/km |
Approx calculated breaking load
(KN) |
| 15 |
3/2.50 |
5.39 |
40.15 |
2.3040 |
4.33 |
| 22 |
7/2.00 |
6 |
60.16 |
1.5410 |
6.45 |
| 34 |
7/2.50 |
7.5 |
94.00 |
0.9900 |
10.11 |
| 55 |
7/3.15 |
9.45 |
149.20 |
0.6210 |
16.03 |
| 80 |
7/3.81 |
11.43 |
218.26 |
0.4250 |
23.41 |
| 100 |
7/4.26 |
12.78 |
272.86 |
0.3390 |
29.26 |
| 125 |
19/2.89 |
14.45 |
342.51 |
0.2735 |
36.64 |
| 148 |
19/3.15 |
15.75 |
406.91 |
0.2298 |
43.50 |
| 173 |
19/3.40 |
17 |
474.02 |
0.1969 |
50.54 |
| 200 |
19/3.66 |
18.3 |
549.40 |
0.1710 |
58.66 |
| 232 |
19/3.94 |
19.7 |
636.67 |
0.1471 |
68.05 |
| 288 |
37/3.15 |
22.05 |
794.05 |
0.1182 |
84.71 |
| 346 |
37/3.45 |
24.15 |
952.56 |
0.0984 |
101.58 |
| 400 |
37/3.71 |
25.97 |
1101.63 |
0.0855 |
117.40 |
| 465 |
37/4.00 |
28 |
1280.50 |
0.0734 |
136.38 |
| 525 |
61/3.31 |
29.79 |
1448.39 |
0.0651 |
146.03 |
| 570 |
61/3.45 |
31.05 |
1573.71 |
0.0598 |
158.66 |
| 604 |
61/3.55 |
31.95 |
1666.00 |
0.0568 |
167.99 |
| 642 |
61/3.66 |
32.94 |
1771.36 |
0.0534 |
178.43 |
| 695 |
61/3.81 |
34.29 |
1919.13 |
0.0492 |
193.25 |
| 767 |
61/4.00 |
36 |
2115.54 |
0.0446 |
213.01 |
AAAC – HS Aluminium Alloy Stranded Conductor
REC
Specification No. 33/1984
| AAAC size equivalent to
ACSR |
Nominal Al-Area |
Stranding and wire dia |
Sectional Area |
Approx. overall Dia |
Approx. Mass |
Calculated Resistance at 20°C
maximum |
Approx. calculated breaking load
|
| mm2 |
mm |
mm2 |
mm |
Kg/km |
Ohm/km |
kN |
|
14 |
3/2.50 |
14.73 |
5.38 |
40.15 |
2.304 |
4.331 |
| Squirrel |
20 |
7/2.00 |
21.99 |
6.00 |
60.13 |
1.541 |
6.467 |
| Weasel |
30 |
7/2.50 |
34.36 |
7.50 |
94.00 |
0.990 |
10.106 |
| Rabbit |
50 |
7/3.15 |
54.55 |
9.45 |
149.20 |
0.621 |
16.044 |
| Racoon |
80 |
7/3.81 |
79.81 |
11.43 |
218.26 |
0.425 |
23.473 |
| Dog |
100 |
7/4.26 |
99.77 |
12.78 |
272.86 |
0.399 |
29.344 |
Aluminium Conductors, Galvanized Steel-reinforced
for extra high voltages IS 398(Part 5) : 1992
(Clause 8.2.2)
| Nominal Aluminium (1)mm |
Stranding and wire diameter |
Sectional area of
Aluminium |
Total sectional area |
Approx overall
diameter |
Approx mass |
Calculated resistance
at 20°C |
Approx breaking load
min. |
| Al. (2) mm |
Steel (3) |
| 520 |
54/3.53 |
7/3.53 |
528.5 |
597.0 |
31.77 |
2 004 |
0.055 52 |
161.20 |
| 560 |
42/4.13 |
7/2.13 |
562.7 |
591.7 |
31.68 |
1 787 |
0.051 99 |
120.16 |
| 690 |
42/4.57 |
7/2.54 |
688.9 |
724.4 |
35.04 |
2 187 |
0.042 42 |
146.87 |
Stranded Aluminium Conductor Steel Reinforced
(ACSR)
S-398 (Part-2) 1996
Clauses 8.21 8.2.2 and 4.3.2
| ACSR Code word
|
Conductor size sq.mm
|
Stranding Nos/mm
|
Stranding Nos/mm
|
Overall diameter mm
|
Weight kg/km |
Ultimate strength kN
|
Calculated Electrical
resistance at 20°C Ohm/km |
Copper equivalent
|
| Al. |
Steel |
Al. |
ACSR |
ACSR |
Al. |
Steel |
| Moie |
10 |
6/1.50 |
1/1.50 |
10.60 |
12.37 |
4.50 |
43 |
29 |
14 |
3.97 |
2.780 |
6 |
| - |
18 |
6/1.96 |
1/1.96 |
18.10 |
21.12 |
5.88 |
73 |
50 |
23 |
6.74 |
1.618 |
11 |
| Squirrel |
20 |
6/2.11 |
1/2.11 |
20.98 |
24.48 |
6.33 |
85 |
58 |
27 |
7.61 |
1.394 |
12 |
| Weasel |
30 |
6/2.59 |
1/2.59 |
31.61 |
36.88 |
7.77 |
128 |
87 |
41 |
11.12 |
0.9289 |
19 |
| Rabbit |
50 |
6/3.35 |
1/3.35 |
52.88 |
61.70 |
10.05 |
214 |
145 |
69 |
18.25 |
0.5524 |
32 |
| Raccoon |
80 |
6/4.09 |
1/4..09 |
78.83 |
91.97 |
12.27 |
319 |
216 |
103 |
26.91 |
0.3712 |
48 |
| Dog |
100 |
6/4.72 |
7/1.57 |
105.00 |
118.50 |
14.15 |
394 |
288 |
106 |
32.41 |
0.2792 |
64 |
| Wolf |
150 |
30/2.59 |
7/2.59 |
158.10 |
194.90 |
18.13 |
726 |
437 |
289 |
67.34 |
0.1871 |
96 |
| Panther |
200 |
30/3.00 |
7/3.00 |
212.10 |
261.50 |
21.00 |
974 |
586 |
388 |
89.67 |
0.1390 |
129 |
| Kundah |
400 |
42/3.50 |
4/1.96 |
404.10 |
425.20 |
26.88 |
1281 |
1116 |
165 |
88.79 |
0.07311 |
246 |
| Zebra |
420 |
54/3.18 |
7/3.18 |
428.90 |
484.50 |
28.62 |
1621 |
1186 |
435 |
130.32 |
0.06868 |
261 |
| Moose |
520 |
54/3.53 |
7/3.53 |
528.50 |
597.00 |
31.77 |
1998 |
1461 |
537 |
159.60 |
0.05595 |
322 |
| Morkulla |
560 |
42/4.13 |
7/2.30 |
562.70 |
591.70 |
31.68 |
1781 |
1553 |
228 |
120.16 |
0.05231 |
343 |
Note : (1) kN = 100,000,000 dyne = 102 kg
Note : The standard length of the conductor manufactured as per
specific requirement of the customer and being supplied in non-returnable
wooden drums or steel drum, quite strong, to withstand any kind of transit
handlings in the erection field.
Product Range
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