I have a request to install "shore power" for some pumps. The motors are labeled 230/415 and they now run on gensets tapped 230/416. My PoCo secondary is a strong 480, sometimes up to 504. Am I going to cook some pump motors using that high a voltage above nameplate?? I have some other motors labeled 440 and don't think there will be a problem, but 415??
U. S. Army equipment
- Thread starter dave704
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quogueelectric
Senior Member
- Location
- new york
Be sure to check the frequency of these gensets as many military surplus gensets are 400 hz as this will surely smoke the pumps.dave704 said:
dbuckley
Senior Member
- Location
- Canterbury, New Zealand
230/415 sounds 50Hz... I'd never have guessed 400Hz though.
mark nelson
Member
- Location
- New Mexico
You will find there is a 3ph system that is made with 3 tranformers. Put in a Y configuration where they use 230 volts to nuetral which makes 415 volts phase to phase.
230 x 1.73 = 398.36
I saw this done when I worked at a test range.
230 x 1.73 = 398.36
I saw this done when I worked at a test range.
broadgage
Senior Member
- Location
- London, England
Not quite, 230 volts phase to neutral is 400 volts phase to phase (new European standard)
415 volts phase to phase is 240 volts phase to neutral (old UK standard)
I dont think that one can get 230/415.
If the pump motors are made to european spec (as the voltage suggests) then they will almost certainly be 50 cycles.
If worked on USA 60 cycle supply, a higher voltage roughly in proportion to the increased frequency may be acceptable.
At 20% higher frequency, and about 20% higher voltage, the motor will tend to draw very roughly the normal current, but develop more HP, and run at a higher speed.
This may or may not be acceptable to the pumps driven by the motors. (extra pumping capacity, perhaps good, higher pressures in the pumped system, possibly not good )
415 volts phase to phase is 240 volts phase to neutral (old UK standard)
I dont think that one can get 230/415.
If the pump motors are made to european spec (as the voltage suggests) then they will almost certainly be 50 cycles.
If worked on USA 60 cycle supply, a higher voltage roughly in proportion to the increased frequency may be acceptable.
At 20% higher frequency, and about 20% higher voltage, the motor will tend to draw very roughly the normal current, but develop more HP, and run at a higher speed.
This may or may not be acceptable to the pumps driven by the motors. (extra pumping capacity, perhaps good, higher pressures in the pumped system, possibly not good )
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