Types of cables
There are following cables as per operating voltages.
( a ) Low Tension cable : Operating voltage up to 1 kV
There are two
types of low tension cable
( b ) High Tension Cable : Operating voltage up to 11 kV
( c ) Super Tension Cable : Operating voltage up to 33 kV
There are three
types of Super tension cables
- H type / Screened type
- SL types
- HSL type ( Combination of H type and SL type )
( d ) Extra High Tension Cable : Operating voltage up to 66 kV
The Extra high
tension cable may be Oil filled or Gas filled.
(
A ) Oil filled cable : There are three types of oil filled cables.
- Single core
- Single core sheath channel
- Three core filler space channel
(
B ) Gas filled cable
The
Gas filled cable may be further classified as
- External pressure cable
- Internal pressure cable
( 1 ) High
pressure gas filled cable
( 2 ) Gas
cushion cable
( 3 ) Impregnated
pressure cable
( e ) Extra Super Voltage Power Cable : Operating voltage of
132 kV and above
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