CT and Analog Ammeter low reading

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Mrlaron

Joined Feb 3, 2021
2
MCC Bucket feeding pump motor the, the current in MCC is showing 37 A, while the analog Ammeter at field near the pump showing very low reading, the CT is 100:5, the analog Ammeter is range 0 to 150, and it is 100:5, any reason for that low reading? The motor full load current is 53.2 A.
 

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Thread Starter

Mrlaron

Joined Feb 3, 2021
2
The scale of reading is 150 each 50 divided into 8 scales, the reading is below the first step, the Ammeter is moving coil. it is in the local control station (LCS) near the motor which both are around 500 meters away from the substation the cable is directly buried. the CT is in the MCC Bucket in the substation.
 
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