Answer / ashish jiwane

Bus is the equipment where the voltage is constant.DC
transformer converts dc voltage from one level to another
level.surge absorber is used to absorb the transient change
in flow of current or rise in voltage due to switching or
lightning.CT ratio is calculated by the ratio of input
currnt to the output current,same for PT.

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what is the difference between RCCB and ELCB?

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what is AVR? what is the function of AVR?

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