Frequency and Voltage Conversion

Ask the generator manufacturer.

Is this question relater to the SEMT Pielstick question?

Increase the speed of the prime mover, but check with the manufacturer to see if the machine can operate at the higher speed, there may be critical frequencies as you accelerate from 50 to 60Hz. Electrically the Volts/Hz difference is just under +5% so you need verification of what the maximum allowable voltage can be. Only the manufacturer can verify these points.

Yep. You have come to the wrong place. You should have gone to the generator manufacturer instead. Have you got a telephone?

On your previous post you give an RPM range 500 to 615, this should be the difference between 50hz and 60hz....probably 6 pole generator....these are manufactured in Japan which uses both 50and60hz so that would make sense....

First you need to check overspeed capability of the alternator and also the prime mover and Packager of the Generator set.

If both prime mover maker and packager confirms suitability, next

1. you need to set all protection relays for new rating.

2. Adjust knee point of under frequency protection in AVR (for 50HZ it may be around 47 HZ, which needs to set around 56.5 Hz)

3. Check capability of Switchgear for suitability.

4. Check capability of all auxiliaries of Prime Mover running of AC supply derived from the same alternator. Specially pumps, radiator fans, ventilation fans. Reason being - output of pumps/fans proportional to cube of speed change - whereas output of motor only goes up by proportional to speed (flow proportional to speed and pressure head proportional to square of speed. Thus power proportional to cube). Also the impellers to be checked for centrifugal strength and any belt drive against increased speed and power.

And any other check which I might have skipped and is specific to your installation.