Answer / naresh

Null meter is
continuously monitoring
the outputs of auto &
manual modes.if any
difference comes
between two modes, null
meter should
indicatess.......

Answer / muneeb

NULL meter at balanced/0/NULL position means no difference
in output voltages of AVR & MVR (manual VR. Used for Smooth
tranfer from AVR to MVR during operation.

Answer / k.prakashchandra

To indicate that auto-tracking is on . i.e. manual channel excitation is equal to that of auto channel, in case auto fails .

Answer / jayapal

AVR PANEL NULL METER USED AS A SETTING VOLTAGE AND GENERATING VOLTAGE JUST LIKE AVERIFICATION METER

Answer / krishana

Null meter used for power factor balance.

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