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Hi ,what the accurate method to set correct(In) over load to
protect the 3~ motor
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Answer Posted / pillay
I follow this method where before setting the overload
current setting I carry out an actual current consumption
test with a clamp ammeter.If the reading is lower than the
rated full load current of the motor I would set it at
actual reading add 5 percent and set it as the tripping
current. But if the the actual consumption is already the
rated fl current or almost it than the setting would be at
the rated full load current of the motor but never exceed
it.This way if it trips at any time than find out the root
cause and than only put into operation.
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