Jakson & Company JakPower Kirloskar Koel Green EA10 G1, Installation, Comissioning & Operator Manual

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EARTHING SYSTEM
Ø
An Earthing system is required for the protection of equipment and human
being, as per Indian electricity Rules 1956.
Ø
Separate earth should be used for Genset body and neutral earthing.
Ø
2 Nos. earthing pits are required for 1 phase DG set and 3 phase upto 30 kVA
1 each for neutral & body.
Ø
3 Nos. earthing pits are required for 40-125 kVA DG set 2 for neutral & 1
for body.
Ø
4 Nos. earthing pits are required for 160 kVA & above DG set, 2 each for
neutral & body.
Ø
The min. distance between 2 earthing pits should be 2.0 meters.
Ø
An earth pit cover should be provided.
Ø
A watering pipe of 25mm with a funnel should be provided for each pit,
wherever depth of the earthing pit is not at water level.
Ø
Earthing system should be checked with megger and resistance between
earth pits and terminal should be less then 1 B/W 2 earth pits Ω
Ø
The earthing plate/pipe and strip size should be above 100 mega
Ω
when
Genset is not connected
4
JAKSON & CO.
SDG Set Rating Recommended Earth Strip/Cable
5-75 KVA 8SWG-Copper
82.5-180 KVA 25X3 mm Copper / 25X6 mm GI
200-380 KVA 32X3 mm Copper / 25X6 mm GI 2 runs
400-500KVA 25X6 mm Copper 2 runs / 50x6 mm GI 2 runs
600-1010KVA 50X6 mm Copper/50x6 mm GI 2 runs
TYPICAL EARTH PIT / STATION ARRANGEMENT
Details of Earthing Strip