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High Voltage out door substation-annual maintenance, things
to be considered
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Answer Posted / a.p.nanjappa
1) BOLT CONNECTION ALL EQUIMENTS CHECKING.
2) MAIN EARTH CONNECTION.
3) eARTH SHIELD, fiber optic cable connections.
4) Test the CB TIMING ,INSULATION, PROTECTION RELAYS,
ct,VT, - OIL TESTS, DS,ES,
5)hvac
6) DC system
7) Outdoor lighting/emergency change over.
8) On line sub stn cleaning eauipment
9) funtional test for Bus bar differenctial protection and
its logic sequence restoration of sub stn equipment. if any)
in case of one and half CB sub-station configuration.
10) fire fighting system.
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