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

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Electricians must prioritize their own safety first, then the safety of others, and finally ensure the equipment is protected. When performing high-voltage shutdown operations, the operator should communicate with the dispatcher or on-site personnel before starting the process. The sequence for power failure begins by switching the main switch to "local." Then, another switch or button (usually green) should be activated to open the cabinet door. Check if the indicator light on the switchgear changes from red to green, indicating a successful operation. Use the rocker to move the handcart out and verify that the switchgear's indicator light is in the correct position—test position light on, working position light off. Next, close the grounding knife switch, and if necessary, turn off the secondary circuit leakage protector. Attach a sign reading “Do Not Operate, Someone Is Working” to the transfer switch handle and report back to the dispatcher or on-site personnel. The power-on procedure follows the reverse order of the power-off steps.