The duration of the test is as follows:
Motors having self-restting thermal motor protectors are operated for 300cycles or for 72h,whichever occurs first,unless they are likely to be permanently subjected to the supply voltage in which case the duration is 432h.
请问这句话该如何理解呢?何为永久的连接到电源?这里只是说连接到电源,是不是说电源线只要接上电源,只要产品马达不带自复位热保护器,就得堵432小时,像冰箱之类的产品就应该堵432h了,但是其他产品呢?
不是很理解这段话,请高手指点,谢谢。