Steve Etter
Lifetime Supporting Member + Moderator
Sorry this is OT. I have a vendor (in Germany) who is telling us that the motors they have ordered (as per the original contract) are rated at 60HZ, 440VAC +5%/-10%. The facility power is nominally 60HZ, 480VAC.
The vendor is asking for a substantial amount to replace motors for new ones rated for 480VAC or, they suggest, we could possibly rewind the originals to run at 480.
I have had no luck getting true motor specifications for the original motors, so I am working blind at the moment.
My questions are these:
1) What is the "reality" of running 440VAC +5%/-10% motors at 480VAC - Will they be damaged? If not, will there likely be any issue at all?
2) If I can't use them as is, is it reasonable to think that they can be rewound to run at 480V?
This equipment is very-long lead and I only have the three options - Use the originals as-is, rewind, agree to pay for new.
Anybody know about this?
Thanks,
Steve
The vendor is asking for a substantial amount to replace motors for new ones rated for 480VAC or, they suggest, we could possibly rewind the originals to run at 480.
I have had no luck getting true motor specifications for the original motors, so I am working blind at the moment.
My questions are these:
1) What is the "reality" of running 440VAC +5%/-10% motors at 480VAC - Will they be damaged? If not, will there likely be any issue at all?
2) If I can't use them as is, is it reasonable to think that they can be rewound to run at 480V?
This equipment is very-long lead and I only have the three options - Use the originals as-is, rewind, agree to pay for new.
Anybody know about this?
Thanks,
Steve