effect of ambient temperature on the motor
effect of ambient temperature on the motor
(OP)
Hello Experts:
we have a 3 phase motor working at ambient temperature about 55 deg. Celsius (attached name plate data)
what is the effect of the ambient temperature on the motor at the long term
we have a 3 phase motor working at ambient temperature about 55 deg. Celsius (attached name plate data)
what is the effect of the ambient temperature on the motor at the long term





RE: effect of ambient temperature on the motor
RE: effect of ambient temperature on the motor
RE: effect of ambient temperature on the motor
(If you derate to maintain estimated insulation temperature below rated, there is no expected loss of life.)
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(2B)+(2B)' ?
RE: effect of ambient temperature on the motor
Muthu
www.edison.co.in
RE: effect of ambient temperature on the motor
What you have here is a USA-made motor, with CSA certification and rated 415V; a small world . . .
I checked NEMA-MG1, the governing standard for this motor, for ambients > 40C, and all I could find is:
Temperature Rise for Ambients Higher Than 40°C
The temperature rises given in Table 31-2 are based upon a reference ambient temperature of 40°C.
However, it is recognized that induction machines may be required to operate in an ambient temperature
higher than 40°C. For successful operation of induction machines in ambient temperatures higher than
40°C, the temperature rises of the machines given in Table 31-2 shall be reduced by the number of
degrees that the ambient temperature exceeds 40°C. When a higher ambient temperature than 40°C is
required, preferred values of ambient temperatures are 50°C , 65°C , 90°C , and 115°C.
Overall, unless this motor has been derated, it won't be with us for long in a 55C ambient. Are there other mitigating circumstances (ie elevation > 1000m, or inverter operated).
Did you check with Reliance, the motor OEM. I'm sure they have mortality data for high ambient temperatures.
See also http://www.eng-tips.com/viewthread.cfm?qid=176014
RE: effect of ambient temperature on the motor