Power Cable LT | Uday Trading

XLPE insulated heavy duty cables were introduced worldwide in mid sixties. These cables have overcome the limitations of PVC Insulated Cables such as thermal degradation, poor moisture resistance and thermoplastic nature.

The advantages of XLPE Insulated cables in comparison to PVC insulated cables are as under:

Technical Advantages:

Higher current rating, higher short circuit rating approx. 1.2 times that of PVC.
Thermosetting in nature.
Higher insulation resistance 1000 times more than PVC cables.
Higher resistance to moisture.
Better resistance to surge currents.

Commercial Advantages:

Lower laying cost because of comparatively smaller diameter of cable and higher weight*.
Lower installation charges as the diameter of cable is comparatively lesser with smaller bending radius, requiring less space requirement for laying cables.
One size lower cable can be used as compared to PVC insulated cable.

*Density of XLPE is lower than PVC

** For longer cable length voltage drop shall be considered

Comparative Current Rating and Short Circuits Rating for XLPE Cable Vis-à-Vis PVC Cables

COMPARATIVE CURRENT RATINGS OF 650/1100 VOLTS MULTICORE HEAVY DUTY PVC INSULATED CABLES & XLPE INSULATED CABLES.

Nominal Size of Cable	3, 3.5 & 4 Core PVC Insulated & Sheathed Cables as per IS - 1554 (Part-1) 1988			3, 3.5 & 4 Core XLPE Insulated & Sheathed Cables as per IS - 7098 (Part-1) 1988
Nominal Size of Cable	In Ground	In Air	pprox Voltage Drop	In Ground	In Air	pprox Voltage Drop
Sq. mm	Amp	Amp	Mv / amp / mtr	Amp	Amp	Mv / amp / mtr
16	61	52	4	74	69	4.20
25	78	70	2.50	95	93	2.70
35	94	85	1.80	114	114	1.90
50	111	104	1.30	134	138	1.40
70	136	131	0.93	164	175	0.99
95	163	162	0.68	197	216	0.72
120	185	186	0.54	223	249	0.58
150	206	212	0.46	249	284	0.48
185	234	245	0.38	282	329	0.39
240	271	291	0.28	327	392	0.31
300	305	335	0.25	369	452	0.26
400	348	390	0.20	420	526	0.21

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