LT-XLPE Cables have a higher conductor rating i.e. "90°C as compared 70°C of PVC and hence higher current rating.
Maximum temperature limit under Short Circuit conditions for LT-XLPE Cables is 250°C as against 160"C for PVC Cables. Hence, LT-XLPE Cables have higher Short Circuit rating.
LT-XLPE Cables have higher emergency overload capacity than PVC Cables ( upto 60%).
LT-XLPE Cables have longer life as compared to conventional PVC Cables.
Tensile Strength for LT-XLPE Cables is 1.9 Kg/mm2 as against 1.25 - 2.5 Kg/mm2 for PVC Cables.
Elongation (%) in LT-XLPE Cables is 300-500 as compared to 200-400 in PVC Cables.
LT-XLPE Cables have high corrosion resistance in polluted atmosphere as compared to PVC Cables.
LT-XLPE Cables have better properties of resistance to chemical and corrosive gases.
LT-XLPE Cables have better properties to withstand vibrations, hot impacts.
Dielectric strength (KV/mm) for LT-XLPE Cables is 40-50 as compared to 20-35 for PVC Cables.
The moisture resistance of LT-XLPE Cables is nearly 100 times that of PVC.
LT-XLPE Cables have low Installation cost because of light weight, dimensions and are far more flexible.
Insulation resistance of LT-XLPE Cables is very high as compared to PVC (as high as 1000 times).
LT-XLPE Cables are ideal for transmission and distribution of power.
Jointing of LT-XLPE Cables is easier and quicker.
Low temperature Brittleness Degree 0C for LT-J XLPE Cables is-90 against-15 for PVC Cables.
OVERALL DIAMETER AND CURRENT RATINGS (IN GROUND) OF 1.1 KV, 31/2 Core, XLPE / PVC INSULATED, PVC SHEATHED (ARMOURED AND UNARMOURED) CABLES.
Nominal Area of Conductor
Approximate Overall Diameter (mm)
Current Rating Multicore
Unarmoured
Armoured
MM2
PVC
XLPE
PVC
XLPE
PVC
XLPE
25
23.9
22.5
25.8
24.4
76
90
35
26.2
24.9
28.1
27.0
92
108
50
29.5
27.4
31.4
29.1
100
126
70
33.5
31.8
35.2
33.5
135
158
95
37.2
34.9
38.9
36.7
165
187
120
41.2
38.7
42.7
40.6
185
215
150
43.8
41.6
46.1
43.9
210
240
185
47.7
43.8
49.6
47.1
235
273
240
56.6
53.2
58.3
55.2
275
316
300
62.5
59.2
64.2
61.0
305
355
400
69.8
66.8
71.6
68.3
335
420
500
77.2
73.4
79.4
74.8
350
505
RATING FACTOR FOR VARIATION IN GROUND TEMPERATURE
GROUND TEMPERATURE(° C)
30
3.5
40
45
RATING FACTOR ( XLPE )
1.00
0.94
0.91
087
RATING FACTOR ( PVC )
1.00
0.94
0.87
0.79
Copyright 2006-08. All rights reserved by CapCab India Ltd.
LT XLPE Cables
