Answer / tanmay maheshwari

Servo motors are used for testing faulty conditions as they
rotates only when an error signal comes to its control winding.
when an error(deviation from a rated speed) occurs in the
system, the control winding which is placed 90 degree to the
main winding generates a reverse torque hence regulating the
speed.

can i connect REF and Differencial relay in 1 CT core for transformer protection?

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what will happen if we use earthing inplace of neutral for domestic energy meter

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why transformer rating is in kva?

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what is the meaning of the HT LT transformer?

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Define active filter?

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