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We have 800KW motor operating at 6600Volt,50 Hz
supply.During 1st startup it tripped on overcurrent
trip.It's FLA is 88 Amps.The K factor of Thermal overloaaad
was set on .94 initially.then we set at 0.97 and then it
started fine.i dont understand why it tripped first?What
are the protections which comes in picture during starting ?
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Answer Posted / kiran patil
You have increased thermal overload settings to .97 I think
because of load motor gets hot early and after incresing
the themal rating it will sustain.
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