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Diffrential relay can protect Pri and Sec of Transformer
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purpose of this connections?
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|length of 4 core cable 95mm from substation LV VFD panel to
Motor at field approximately 150 meter. Motor stop and power
has been isolated from LV MCC ( Substation )to disconnect
Motor for services. After Motor completed service propose to
reinstall and reconnect Motor Cable, found earth cable
sparkling during touching at metal / motor body.
Inspect by clamp meter found earth cable have current flow
AC 1-2amps and all earth cable at MCC LV also have current
flow as same value. why it is happen?
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|For high voltage and low current Circuit Breaker preferred
is vacuum circuit breaker.why?
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