power derating การใช้

With an " infinite " heatsink, that is : when the case temperature is certain to be 25 degrees, the power rating is about 115W ( some manufacturers specify 117W ), but most applications ( and certainly when the ambient temperature is high ) a significantly lower power rating would be expected, as per the manufacturer's power derating curve.
Friends of the Earth submitted evidence and sworn statements of John Large of the London-based nuclear consulting engineers Large & Associates, demonstrating that the steam generating tubing degradation was a generic fault of the Mitsubishi design and that, crucially, Edison's power derating of the two nuclear units would not lower the rate of wear or the risk of catastrophic tube failure.