Power Generation: Product Operation and Maintenance

[Bobo]

Hi there, I have a 550kva Cat with ECM 3.2 which today has a low voltage fault. I have measured the voltage at the line side of the breaker and there is only 50V instead of 415V. Can anyone suggest a likely cause/ place to start looking for the problem? Thanks

[mikel]

Sounds like you have a voltage regulator problem, since your generator is generating a voltage output at a residual level, it is likely the field is not being excited. Start by checking the F1 (+) and F2 (-) leads and see if a DC voltage is present, typically something above 10 VDC. Start with that and we can go from there.

Mike L.

[arain1984]

Please check the Engine RPM. One Time this problem and solve problem

your problem solve then reply

[tuyenpham]

Pls clear more. The genset was running in 1500 rpm and there was no overload, suddently It's  voltage dropped form 415V to 50V or the voltage's always 50V???

I think your AVR might get failed. Pls check as DC Voltage between F+ & F- after check all connection.