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Answer Posted / touch2gobi
Derating Factor value depends upon the motor environment,
For example:
Motor design temp – 45 deg C
But motor location ambient temp 65 deg C (near any burner
or heat source)
So motor performance (rated power) will reduced due to
ambient temp.
For that motor manufacturer given Derating Factor value.
Ex:
Rated power = 45 kW
Derated power = 42 kW (Operating Temp – 50 deg C)
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