Answer Posted / waqas iftikhar

To keep the torque on a DC motor from reversing every time
the coil moves through the plane perpendicular to the
magnetic field, a split-ring device called a commutator is
used to reverse the current every 180 degree at that point.

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Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault

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plz tel me syllabus and exam date 4 jr executive engg (electrical)

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DG Earth Value?

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what happens to the supply voltage if there is any change in frequency?

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