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No the only running indications we had prior to shutdown were increased rotor amps and increase in vibration when we put vars on the generator. Leading vars actually decreased vibration quite a bit during testing.

The air cooled condenser for a 500mw plant seems to have decreased. Specifically on hot humid days. We are going to check fan blade pitch and cleanliness of cooler. Is there anything else that should be checked.

We did some var testing prior to recent shutdown which pointed towards shorts. During outage we did some generator testing and inspections. Pole drop test showed we have rotor shorts so in now removed for a rewind. thanks for the help

Thanks for the help. I should add we have a Bentley system that reports to a computer and someone from our performance group is going over the data. The generator 13.8kv and just recently the vibration has got much worse. Most of the time load run steady for entire 24hr period and is changed...

Water has to be pure like the water used for water injection. You should also look at your turbine inlet duct and determine if you will have other problems from using fogging. Our turbine has a double wall inlet duct with insulation for sound. The inside wall is steel which is not solid. Over...

I'm looking for help with determining the cause of vibration in a generator. It is a 112mw air cooled unit attached to a gas turbine. This has been an ongoing problem for over a year. Initially we had high shaft vibration so balance moves were attempted. The shaft vibration was decreased after a...