I have 90KW Motor 60 Hz,380V Pf 0,88.
after testing the Motor without Load is the no load Current
36 A,but wenn i put load after 2 hours the current increase
more than 156 A.
Can anybode tell me waht is the Problem?
Answers were Sorted based on User's Feedback
Answer / linu mohan
motor full load current is 155-162A for different categories
of make;so check from which load the motor is connected
ex-compressor,pump or crusher likewise anything
1)compressor- air might have blocked in the filter due to
impurities in the air after few hrs,so motor taking high
current.
2)pump-jamming might have blocked in the filter due to
impurities in the water after few hrs,so motor taking high
current.
if the motor is kept in a closed atmospheric room then due
to heatness after few hrs motor will take full load current
&tripping occurs,so to avoid that; place an exhaust in there.
last option clear that its not a star delta feeder...
if then also problem is not solved&strikes again then it
comes under mechanical head for sure
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / michael
the simpliest answer to your question is in this example.
example you have to lift a 10 kg of rice, you use a little strength in order to lift it, but if your tying to lift a 50 kg of rice, you will exert much effort and strength in order to lift it. it is similar to the motor. if there is higher load the current will increase in order to satisfy the load required..
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / manish parekh
Dear Sir,
The 90KW motor FLC is approx 155Amp so the motor amp
increseing after load so load will be 100% on motor.
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / ketan patekar
90 KW motor full load current carrying capacity is 236 ampere..
And yes when you connect load than afcourse your motor will carry ampere as per your load.
So here everything is ok.
If your motor carrying above 236 ampere current than there is some fault like your load is high or impeller or frame or design problem etc
| Is This Answer Correct ? | 0 Yes | 0 No |
During speed control of dc shunt motor with flux control methode,when armature voltage is constant, How can it possible to increasing the armature current?
What is the major difference between P.T. & C.V.T ? Why CVT is used in HT Transmission line in place of P.T.?
What are the advantages of speed control using thyristor?
what will happen if dc supply is given to ac motor?
what is a core company? why should we join a core company?
Why single core cable required bonding at double end.
where is the need for short circuit test for 3 see is required and why? can you explain in brief with application
what happens when back feeding supply accidently collapses with normal supply ??? How?? [that is sometimes in a substation 11kv feeder if their ws long time permit work, back feeding supply will provide from nearest substation... if accidently after the permit work,they charged the feeder without removing back feeding wat will happen...?]
What is the Ohms low calculation
one kva is equal to how much amps?
why the earth pin in a 3-pin socket is longer and thickest?
can we run three phase motor by single phase? and what happens if we do this
Civil Engineering (5086)
Mechanical Engineering (4456)
Electrical Engineering (16639)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)