which one is rotating transformer-single phase induction motor or 3 phase squirrel cage motor?
Answer / mojinkoshy
Both. The principle of operation for transformer & motor is same, Faraday's law of induction. The single phase induction motor works like a single phase transformer & three phase motor works like three phase transformer.
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suppose MCC (Motor control center)panel work on field the relay on this damage or not work and earth fault occurs in this and no indication in relay panel given below. than MCB trip or not and what effect the panel how find relay will damage or not work.
how to check the 3ph capacitor is good or not.
14 Answers MacLellan, Yash Technologies,
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One of our gas turbine generator unit "1st stage rotor ground fault" alarm was occured several times. we tried to measure some voltage vulue ground fault protection relay (UNS3020a made by ABB and we measured the value of: Ground: 0.9VDC 5V: 5.8VDC 24V: 23VDC u+: 300 – 350mVAC Rf1: 17.5mVAC Rf2: 17.6mVAC The unit still running and the alarm was reset. As of 6pm yesterday and unitl now no alarm happened again. I our protection relay was defective?
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