IEC60439对800A以上母线的温升试验要求是“temperature rise tests on the main circuit rated above 800A carried out at 50Hz are valid if the rated current at 60Hz is reduced to 95%”. 比如50Hz做了4000A的试验，那么在60Hz下只能应用4000A*0.95， 还是为了证明能在60Hz下应用，需要做50Hz下4000A*1.05的试验？

同样的母线/配电柜在50Hz下的温升高还是60Hz下的温升高？