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Safety measures during line operation Safety measures during line operation The power supply and shutdown of the line shall be carried out according to the instructions of the dispatcher on duty or the line work permit. In case of power failure, all circuit breakers, line disconnectors and bus disconnectors that may be energized by the line shall be pulled open first, and the handcart switch shall be pulled to the test or maintenance position. After it is verified that there is no voltage, all terminals on the line that can be energized shall be installed with grounding wires or closed with grounding switches. The indicator board of "No Closing, Line Manned" shall be hung on the operating handle of the circuit breaker and disconnector, and the operating position of the circuit breaker and disconnector on the display screen shall be set with "No Closing, Line Manned" -
High voltage phase detector Overview of high-voltage phase detector: it is a regular work for power system to check phase sequence, and the traditional phase detector method uses voltage transformer. This method is cumbersome and inconvenient. The HX-85 series high-voltage nuclear phase detector produced by Shijiazhuang Kerui Electric Co., Ltd. makes the high-voltage nuclear phase detector, which is dangerous and essential, safe and reliable. The pointer display is clear at a glance. The weight is 1/10-1/20 of the transformer, which is very convenient to carry. It is an indispensable tool for power maintenance and construction. 1、 The use method of high-voltage phase detector assumes that two lines meet the parallel connection conditions, as shown in the figure: -
Precautions for use of grounding wire Precautions for use of grounding wire 1. The grounding wire must be checked before work. Whether the soft copper wire is broken, whether the screw connection is loose, and whether the elasticity of the hook is normal. If it does not meet the requirements, it should be replaced or repaired in time before use. 2. When driving the grounding pile, it is necessary to use the grounding body to quickly dredge the large accident current to ensure the grounding quality. 3. Take care of the grounding wire. The ground wire shall not be twisted during use, and the soft copper wire shall be coiled when not in use. After the ground wire is removed, it shall not be dropped from the air or thrown anywhere. It shall be transmitted with ropes, and attention shall be paid to the cleaning of the ground wire. 4. Suspended at both ends of two sections at the work site
