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一个小型继电器,附加一个小电容和两个电阻、便构成了相序测量环节,该环节同时又是错相的保护执行环节,兼有断相保护控制功能。
A small relay, plus a small capacitor and two resistors, constitute a phase sequence measurement, which is at the same time the wrong phase of the implementation of the protection and control, both phase failure protection control.