Answer Posted / ch subhash kumar
Bucholz relay can be tested in two ways
1. By shorting the terminals which is located in the
teriminal box of bucholz relay
2. This is real test to do this test you have to isolate
bucloz by closing the valve which is connected from main
tank to conservator tank there are two valves one is
entering to bulcoz relay and another is leaving from bulocz
relay these two valves to be closed and then there will be
a drain valve in bulcoz the bulcoz relay from there you
have to drain the oil then the float will come down it will
be activated.
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generally in LT and MV motors we are using 3.5Coresx16,25,35,50 etc cable for supply.although motors is earthed at two point and having all protection.then why we are using that 1/2 core for earthing the motors.while in HT cable we are using only 3core cable for motor supply.generally lt and mv motors are delta connected and ht motors having star connection.whethere it is having any relation with winding connection( star or delta).all motors i am talking about are dol only.can anybody solve my confusion.thanks...
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