Why -48V dc power supply using in telecom field?
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Answer Posted / u.chandarasekar
Why Because Earthing contrctor Earn money so that
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what is the voltage between earth & neutral in 3 phase electrical connection.
A TRANSFORMER 440/400V,DELTA/STAR CONNECTED.THE NEUTRAL CONNECTED WITH GROUND CABLE THAT IS DIRECTLY CONNECTED TO THE PANEL,FROM PANEL IT IS CONNECTED EARTH PIT.IS IT RIGHT? IF IT IS RIGHT LEAKAGE CURRENT AFFECTED.SECONDATY IS PROTECTED WITH EARTH LEAKAGE RELAY.
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