High-voltage power distribution unit "five defense" content is what?

The main contents of the five preventive functions of high-voltage power distribution devices are: \r\n1) to prevent the load split. Close the disconnecting switch; \r\\n2) to prevent the misopening. Close the circuit breaker; \r\\n3) to prevent charged hanging ground wire (or close the grounding knife gate); \r\n4) to prevent the ground line to close the disconnecting switch \r\n5) to prevent the wrong entry into the charged interval. \r\\nHigh-voltage power distribution devices in addition to its own already have to prevent electric shock protection function, should also be satisfied with the requirements of the five protection protection function. This is to prevent electric shock personal injury and death accidents . Electrical fires and electrical equipment damage accidents to ensure the safety of the power system and power units. In order to meet the five protective functions, generally in the high-voltage power distribution equipment installed to realize the five protective functions of the locking device.