TROPOTHEN-S ® EHV XLPE Cables

TROPOTHEN-S ® represents the latest generation of Super Tension XLPE Cables for bulk power requirements and are sutiable for versatile operation from voltage grades 66 to 220 kV. CCI has set up the new "State of the Art" Mitsubishi Dainichi Continuous Vulcanising (MDCV) plant in collaboration with Mitsubishi Cables Industries Ltd., Japan.

This line ensures stabilised manufacture of Extra High Voltage cables with large conductor sizes. Cables are manufactured in accordance with the latest International Standards and conform to stringent performance requirements which have been drawn up for reliable long term service. To supplement its manufacturing facilities for cables in the Super Tension range, the Company also has a Continuous Catenary Vulcanisation (CCV) line.

TROPOTHEN-S Cables have been successfully tested at independent laboratories like CPRI,and have also been subjected to full range of testing, complete with joints and end terminations at an International Test House for evaluating the cable system as a whole. The cables have also proved satisfactory in field performance. EHV XLPE cables are manufactured generally in accordance with IEC 502 & IS:7098 (Part 3) standards. The typical constructions and their salient features are as given below.

Features of Metal Laminated Sheathed Cable:

1. Impervious to ingress of water.

2. Layer is very thin, hence compact cables.

3. Lighter in weight.

4. Smaller diameter as compared to metalic sheathed cable.

5. Additional copper wires screen is necessary to carry fault current.

6. Larger delivery length and hence less number of joints.

Features of Lead Sheathed Cable:

1. Continuous seamless sheathing, hence excellent protection against water penetration.

2. Cable is mechanically strong.

3. Lead sheath can act as a metallic part of insulation screens.

4. Additional copper wires screen is not necessary to carry earth fault (short circuit) current except for the cases when earth fault current magnitude is very high.

Features of Aluminium Sheathed Cable:

1. Excellent protection against water penetration.

2. Cable is light in weight.

3. Cable is mechanically stronger.

4. Earth fault current carrying capacity of sheath is higher.