In an ammeter used for measurement of current, what is the meaning of the repr

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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In an ammeter used for measurement of current, what is the meaning of the representation of range ..

ABOVE REPRESENTATION SHOWS IT IS AN SUPPRESED SCALE OF
AMMETER
0-50-300A -------> IT MEANS IT MEASURES CURRENT FROM 0-50A
AND 300 INDICATES THAT 6 TIMES OF MAXIMUM CURRENT i.e
50*6=300
AT THE TIME OF SWITCHING CURRENT GREATER THAN THE NORMAL
VALUE
IT IS ABOUT 5-6 TIMES THE NORMAL VALUE
AT STARTING THE NEEDLE IN AMMETER GOES TO 300 AND WITH IN
FRACTION OF SECONDS COMES TO NORMAL VALUE

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In an ammeter used for measurement of current, what is the meaning of the representation of range ..

Answer / mahesh

It is a meter that can used in motor fdr. means motor FLC
is 50 Amp. & it's starting current is 6 times, i.e.300AMP.

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In an ammeter used for measurement of current, what is the meaning of the representation of range ..

Answer / jay shah

It means the ammeter has a provision to select between 0-
50amps or 0-300amps full scale range.

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In an ammeter used for measurement of current, what is the meaning of the representation of range ..

Answer / 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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