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 ?
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.
Is This Answer Correct ? | 5 Yes | 5 No |
Post New Answer View All Answers
What is mason's gain formula?
what is the effect of un-synchronized power.
Is there any Institution for giving M-tech in Electrical engineering for those who r in service? Give the details please.
describe the Tranformer testing procedure
700KW 6.6KV slip ring induction motor to use VFD to control the speed
sir i completed apprentice in TNEB.apprentice is eligible for 'c' licence
PLZ EXPLIN ABOUT CLASS PS CLASS CT .WHY THEY R DESINED AND FOR WHAT PURPOSE?WHY OTHER CT CANT BE USED AS PS CLASS CT? EXPLAIN IN SIMPLE LAUNGAGE IF POSSIBLE PLZ GIVE CIRCIT DIAGRAM?EMAIL-RAJ_SINGH_0376@SIFY.COM
what is the setting of locked rotor in HT motor ? (answer expecting in percentage)
how to make an earthing certificate
what is ps impedance test
why single phase to grd test in HV cable?why not 2 phase at a time?
what is meant by the phrase 'static load' in case of shorting in a generator excitation system?
Why we use duplex coil and hook switch in telephone system?
What is the difference between diode and a transistor in terms of the direction of current flow?
why transformer ratings in kva? & DG ratings in kva? & Motor ratings in kw/HP?