- 47, phase-sequence or phase-balance voltage relay
- 相序或相平衡电压继电器。在规定的相序多相电压的预定值条件下,当多相电压不平衡或负序电压超过预定值时动作的继电器。
English-Chinese electricity dictionary (电气专业词典). 2013.
47, phase-sequence or phase-balance voltage relay
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