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11KW Delta motor is taking about 44Amps in star and goes
upto 70Amps in delta and trips OFF. The rated current is
26Amps. Application is for the blower. The motor takes ( no
load without coupling impller ) only 2.5A and 5Amps in star
& delta starter test.Need to know why its taking high
current.
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Answer Posted / tj
Following is the check seq. :
1 Check for correct DOR/Phase Seq, ensure termination is
correct n tight.
2 Check the relay for malfunction & its type if it is
thermal then increase setting a bit more than ratd amps &
chk, n if its micro proc based then adjust the setting
acording to motor starting curve.
3 Ensure that suction damper is at min. before starting.
4 Ensure the motor is correct according to fan torque.
5 Check for any abnormal sound or play from fan side.
6 Also check the cable, it should not be underrated, causing
higher potential drop at startup.
Hope the above helps you........
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