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In an ammeter used for measurement of current, what is the
meaning of the representation of range as '0-50-300'?
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Answer Posted / sella
THIS TYPE AMMETER WILL BE USED IN MOTOR FEEDERS. IF THE
MOTOR'S FULL LOAD CURRENT 50 MEANS IN STARTING TIME IT WILL
TAKE 50x6 TIME=300AMPS. THAT'S WHY WE ARE USING THIS TYPE
AMMETER IN MOTOR FEEDER. IN THIS AMMETER UPTO 0-50 AMPS
PROPERLY DEFINED IN DISPLAY BUT AFTER 50-300A THEY JUST
MENTION IN DISPLAY. IF WE USE NORAML AMMETER(0-50AMPS).IN
STARTING TIME METER WILL BE FULLY CLOSED FOR SOME SECOND
BECAUSE OF THIS METER ACCURACY WILL GO DOWN. IN NORMAL TIME
METER NEEDLE IN ACCELATION WE CAN'T MEASURE PROPER VALUE.
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