unstable ampere in motor 3300 V 1250 HP
unstable ampere in motor 3300 V 1250 HP
(OP)
Hi Guys,
i have a trouble with my motor with name plate bellow :
Voltage : 3300 V
RPM : 3000
Ampere : 180 Ampere
HP : 1250 HP
the problem is when i each time i start the motor the ampere is not stabel for about 15 second around 17-24-40 ampere and after that the ampere is stable 25 ampere (No Load). and for the 15 second the motor sound rought.
this motor using metal bearing.
need opinion non this..
thank you
regards,
Marten
i have a trouble with my motor with name plate bellow :
Voltage : 3300 V
RPM : 3000
Ampere : 180 Ampere
HP : 1250 HP
the problem is when i each time i start the motor the ampere is not stabel for about 15 second around 17-24-40 ampere and after that the ampere is stable 25 ampere (No Load). and for the 15 second the motor sound rought.
this motor using metal bearing.
need opinion non this..
thank you
regards,
Marten






RE: unstable ampere in motor 3300 V 1250 HP
Check your starter very thoroughly before you do some serious damage to that motor.
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RE: unstable ampere in motor 3300 V 1250 HP
How long does it take to get up to speed?
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RE: unstable ampere in motor 3300 V 1250 HP
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RE: unstable ampere in motor 3300 V 1250 HP
RE: unstable ampere in motor 3300 V 1250 HP
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: unstable ampere in motor 3300 V 1250 HP
RE: unstable ampere in motor 3300 V 1250 HP
the bearing is metal bearing not ball bearing...
what could be the possible the cause of the first start up and down ampere for first 10 second and the rought sound?
RE: unstable ampere in motor 3300 V 1250 HP
If so, the excitation is usually high at start and does sometimes make the pole angle oscillate.
First question: Is it synchronous?
Second question: Has anything been done to the excitation system?
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: unstable ampere in motor 3300 V 1250 HP
I remember a startup that involved manually rolling four, 3000 HP motor generator sets each night before starting them. They took a crew of from four to six men to roll them over until the oil worked into the bearings.
Bill
--------------------
"Why not the best?"
Jimmy Carter