High-voltage power-off operation process - Solutions - Huaqiang Electronic Network

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Electricians must always prioritize safety—first for themselves, then for others, and finally for the equipment they work with. When dealing with high-voltage shutdown procedures, it's crucial that the operator contacts the dispatcher or on-site personnel before starting any operation. The process begins by switching the main switch to "local" mode. Then, another switch or button (usually green) should be activated to unlock the cabinet door. It’s important to check whether the indicator light on the switchgear changes from red to green, confirming the system is ready. Next, the drawer should be pulled out using the rocker mechanism, and the position of the switchgear should be verified—when in the test position, the corresponding light should be on, while the working position light should be off. After that, the grounding knife switch must be closed if necessary, and the secondary circuit leakage protector may need to be turned off. A warning sign reading “Do Not Operate, Someone Is Working” should be placed on the transfer switch handle, and the operator should report back to the dispatcher or on-site personnel. The sequence for power transmission is essentially the reverse of the shutdown procedure.