Answer / krupa s

clipper is the circuit it removes the unwanted portion of
the waveform (voltage)
clamper shifts the Signal(voltage) to the required level
Both are electronic circuits.

Answer / priotom dalani

CLIPPER : IT IS AN ELECTRONIC DEVICE THAT CLIPPS OFF OR REMOVE AN UNWANTED PORTION OF INPUT SIGNAL WITHOUT DISTORTING THE REMAINING PART OF THE WAVEFORM. THE CLIPPER WHICH REMOVES THE POSITIVE HALF CYCLE OF THE IN/OUT SIGNAL IS CALLED NEGATIVE CLIPPER.
CLAMPER : THE CLAMPER CIRCUIT DOESNOT CHANGE THE PEAK TO PEAK RMS VALUE OF THE INPUT WAVEFORM. HERE THE WHOLE SIGNAL IS EITHER SHIFTED UPWARD OR DOWNWARD FROM THE REFERENCE LEVEL,ACCORDINGLY ,IT HAS BEEN CLASSIFIED AS POSITIVE AND NEGATIVE CLAMPER RESPECTIVELY.

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on 22.03.2015 at 17:15hrs Y phase 66kV class Power Trf-2 Current transformer has flashed over and oil came out. The failed CT has been replaced on 24.03.2015 at 13:15hrs and the Trf has been charged in presence of RT Hassan after conducting the pre-commissioning tests. On the same day at 17:00hrs the commissioned CT has again flashed over and immediately the Trf  has been isolated from power supply. It is confirmed the secondary is not opened and checked the earth integrity and is found ok. Here what would be the reason for the CT failure? 

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OHMS LAW

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