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Synchronoun Motor Fluctuating

Synchronoun Motor Fluctuating

(OP)
We have HP & MP 15MW injuction synchronous motors the MP with voith coupling start fluctuating during loading 55% of its running load, the motor PF and load current fluctuate and tripped on rotor earth fualt. all excitation circuit tested and found okay.
this is the second time any help?

RE: Synchronoun Motor Fluctuating

Could you take a picture of the coupling? Not sure if you have a Fluid coupling for soft start or something different.

When it comes to couplings we are always here to help.
WWW.PSCCOUPLINGS.COM

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