Important update: GB/T 7251.2-2023 The new standard for Low-voltage Switchgear and Control equipment - Part 2: Power Switchgear and Control Equipment - was published on August 6, 2023 and will be implemented on March 1, 2024, replacing the old GB/T 7251.12-2013 standard.

When the power supply is stopped in the distribution room, a slight negligence or operation error may cause a major power accident. In order to ensure the safety and accuracy of the operation, we must strictly follow the formal operation steps and comply with the relevant operating specifications. This paper will introduce in detail the operation process and precautions of power supply shutdown in the distribution room.

low-voltage complete set of equipment ‌ is responsible for the control, protection, measurement, conversion and distribution of electric energy in the low-voltage power supply system. Because the low-voltage complete sets of equipment have penetrated into the production site, public places, residential and other places, it can be said that any place that uses electrical equipment should be equipped with the equipment. About 80% of China's electric energy is provided by low-voltage complete sets of equipment, so the development of low-voltage complete sets of equipment is rooted in the material industry, low-voltage electrical appliances, processing technology and equipment, from one side reflects a country's economic strength and science and technology, living standards ‌