Q. In a servo controlled voltage stabilizer, the basic purpose of ? is to increase or decrease the voltage which is fed to the buck boost transformer.

A
MCB
B
Buck Boost transformer
C
Dimmer
D
Contactor
Solution:

The basic purpose of dimmer is to increase or decrease the voltage which is fed to the buck boost transformer. 50% of the output voltage is increased or decreased by dimmer only.

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