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首先根据19.7等非正常测试时,TMP-Thermal Motor Protectors是否动作来满足19章的要求。如果TMP不动作,则附录D不需要;如果TMP动作,则按附录D测试,附录D主要考核的是TMP,所以timer or programmer不应起作用。在器具内还是器具外做,个人觉得问题都不大。+ z, o& m5 d9 ~" v$ b
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关于绕组的温升计算,标准倾向电阻法,除非满足如下要求。
. R9 Z6 N+ Y, |* D; cTemperature rises of windings are determined by the resistance method unless the windings 3 O9 i8 ^9 b G
are non-uniform or if it is difficult to make the necessary connections, in which case the
8 E7 p0 z, a9 v/ G- Z3 b2 `, ~. @temperature rise is determined by means of thermocouples.
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DC马达如果能测到换向器是需要用电阻法,如果测不到,可以用热电偶法。" Y& {9 S/ P# W7 V, {5 N& e# I
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以上,供参考。 |
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