Changing Voltage
Changing Voltage
(OP)
Is it economically practical to change a voltage supply of a MCC from 480V to 600V?
Our generator supplies 600V. Basically, we just want to remove the transformer that we are using from the supply to the MCC. I'm having second thoughts about this because prices of 480V and 600V motor has a slightly big difference. And we have to replace all our 480V motors to be compatible with the supply. I think it will be a very big expense for our company.
Please help me on this. I need to defend this to my manager.
Thanks!
Our generator supplies 600V. Basically, we just want to remove the transformer that we are using from the supply to the MCC. I'm having second thoughts about this because prices of 480V and 600V motor has a slightly big difference. And we have to replace all our 480V motors to be compatible with the supply. I think it will be a very big expense for our company.
Please help me on this. I need to defend this to my manager.
Thanks!





RE: Changing Voltage
Rafiq Bulsara
http://www.srengineersct.com
RE: Changing Voltage
The last time I saw something like this done, every generator and every motor was the wrong voltage. Someone was getting a kickback on all the transformers. Consider whether you want to interfere.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Changing Voltage
And yes, the cost of replacing/rewinding all your 480 V motors to 600 V is an expensive proposition.
Muthu
www.edison.co.in
RE: Changing Voltage
As to the MCC, it looks OK on the surface; the current will be lower so all the starter ratings will be fine, i.e. less current. But scratch the surface and you start adding more expense. On large motors, you may have to change out the circuit breakers because they might be too large for the motor current now (probably won't be much of a problem with smaller motors). All of the heater elements will need to be changed, or at least adjusted, to match the new motor FLAs. All of the Control Power Transformers will need to be changed, along with any primary fusing. There might be more little gotchas like that.
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RE: Changing Voltage
Muthu
www.edison.co.in
RE: Changing Voltage
Thank you very much for the replies.