When both contractor star & delta is hold in star delta motor ?? So what happen in this case ??
what is the reason for indication of light in the earth lamps of main switchboard.if there is an earth why does one lamp get dim and the other two bright.
In 2500kva transformer how much is the withstand High voltage power frequency between primary to secondary and earth? And secondary to primary and earth?
what is the difference between diode and zener diode?
If a transformer primary winding operates at 240v, the secondary at 120v and the load is 1500w & the transformer is rated at 92% efficient, what's the current flowing through the primary winding of the transformer? What is the formula for finding this?
WHAT IS METHOD TO DESIGN SIZE OF A 11KV UNDER GROUND CABLE FOR A OUTGOING FEEDER FEEDING 6NOS 250KVA TRANSFORMERS WITH 5KM LENGTH OF FEEDER?
when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?
why the autotransformer burnt while stating the pumpmotor?, In starter and motor there was no abnormality.
Why distribution transformer secondary voltage is 0.433kV instead of 0.415kV.all other switchgear rating are 415 volt??
Does outdoor isolator loose connection cause short circuit current in that circuit? if yes then how ??
why we use Test Terminal Block in 11 KV and 33 KV electrical panels.
how to calculate voltage regulation?
What is the formula to calculate the rating of a three phase trnasformer
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