Generator Engine Runs Fine but No Voltage is Produced.

[Saturn_Europa]

I have an FG Wilson back up genset at my house. Its brand new and the unit has never had any problems. Last night there was a lightening strike on a utility pole about 20 meters away. The genset will run fine for 30 seconds then throws the alarm: u L. Its a shutdown alarm.

It is producing around 23 volts L -N and 45 v L -L. Its a 230/400 v 3 phase machine.

I think its the exciter. Anyone else?

Please see attached data plate.

 

[Hv&Lv]

I have an FG Wilson back up genset at my house. Its brand new and the unit has never had any problems. Last night there was a lightening strike on a utility pole about 20 meters away. The genset will run fine for 30 seconds then throws the alarm: u L. Its a shutdown alarm.

It is producing around 23 volts L -N and 45 v L -L. Its a 230/400 v 3 phase machine.

I think its the exciter. Anyone else?

Please see attached data plate.

Did you field flash it to see?

 

[Saturn_Europa]

Did you field flash it to see?

I did not. But I got a service tech on the phone. The voltage being produced is above excitation voltage. He thinks the coil is fried. I am going to call him back when I get in front of the unit.

 

[Russs57]

My experience, without knowing the details, would be diodes (and surge suppressors if present) in the generator followed by voltage regulator as most likely suspects.