From the appropriate IEC standard, (not motor vendor's catalogue) ... what is the required length of the motor shaft keyway for a 100 frame motor.
Thanks,
jOmega
jbartos:
Josef --
The following is offered in response to your comments in the thread...DC Motor brush life....thread237-77159
"///Motor load is often considered with a constant shaft load (HP).
Since HP~Watts=ExI, then the only way to preserve the relationship
for E decreasing is by I...
Any one know of or able to provide a reference to a study on the long term affects of VFDs on motors ?
Colleague in Italy has asked for some information thereof.
Much appreciated.
jOmega
JBartos, in a previous thread (#237-69725), stated:
"Suggestion: There are VFD manufacturers that offer Mean Time Between Failure (MBTF) values for their products off the assembly line; however, not for the custom-made products, e.g. ABB"
To which we replied that MTBF is a crafted...
2000 kVA transformer
4160 / 480 5%IZ
What would be a reasonable assumption or WAG ..
for available Short Circuit Amps ... and impedance on the utility side (4160)
Thanks ..
jOmega
...from thread thread 237-66987
Use of VFD output side contacter for E-stop
jOmega said:
"Any contactor that is rated my its manufacturer for ac motor duty, is ok. Suggest NEMA rated as opposed to IEC as an IEC contactor will likely shorten motor life."
ScottyUK asked what the...
The below was received by dridoc@email.com and was forwarded with a request to post it in this form with the hope that the members might have some advice for Mr. Lyman
Thank you, all.
jOmega
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Hello !
I'm looking for very simple, low-cost PC...
