a motor's measured current is 45amp,whereas the rated current is 38 amps

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a motor's measured current is 45amp,whereas the rated
current is 38 amps but still it is running ,how?

Question Posted / sudsbanerjee

5 Answers
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a motor's measured current is 45amp,whereas the rated current is 38 amps but still it is runn..

Answer / sabnavees

The motor is running due to the non operation of the thermal
over load relay. The motor will keep on running till the
winding temperature increases the designed limit, finally
the motor will burn under the winding short circuit
condition causing production loss & down time .

Is This Answer Correct ?

4 Yes

0 No

a motor's measured current is 45amp,whereas the rated current is 38 amps but still it is runn..

Answer / rajesh

Ans #1 is partly correct, but probably that is not the
intended answer. Rating of a motor is decided depending on
the ambient temperature. When you say that the rated
current is 38 Amps, what you mean is it can take a
continuous current of 38 Amps at the design ambient
temperature (say 40 degree C). During winter, the ambient
temperature may be 10 deg. At that ambient, it can take a
much higher current. (You can also give extra cooling of
the motor winding by providing an external ventilation
fan).

Is This Answer Correct ?

4 Yes

0 No

a motor's measured current is 45amp,whereas the rated current is 38 amps but still it is runn..

Answer / sathiarajan

The motor is over loaded. It can work under over load for a
short time period.

Is This Answer Correct ?

5 Yes

2 No

a motor's measured current is 45amp,whereas the rated current is 38 amps but still it is runn..

Answer / sam

ya after the winding overheats it will damage the motor,
the check O/L relay setting and its functioning we had the
same problem.

Is This Answer Correct ?

3 Yes

1 No

a motor's measured current is 45amp,whereas the rated current is 38 amps but still it is runn..

Answer / hameed

maybe there is a problem in load which this motor run it &I
wender if you cheak all the phases

Is This Answer Correct ?

0 Yes

0 No

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