【2025.1.1】4. Does a first-class load require power supply from two separate power sources?

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【I&C Garden】4. Does a first-class load require dual power supply? 【Answer】It is required. 【Basis】Code for Design of Power Supply and Distribution Systems (GB50052-2009), 3.0.2: Class I loads shall be powered by dual power sources, such that if one source fails, the other shall not be damaged simultaneously. 3.0.3 The power supply for particularly important loads among the first-class loads shall meet the following requirements: 1 In addition to being powered by dual power sources, an emergency power source must also be provided, and it is strictly prohibited to connect other loads to the emergency power supply system. 2 The switching time of the power supply for the equipment shall meet the requirements regarding allowable power interruptions for that equipment. 3.0.4 The following power sources can be used as emergency power sources: 1 A generator set independent of the normal power supply. 2 A dedicated feed line in the power supply network that is independent of the normal power source. 3 Batteries. 4 dry batteries. 3.0.1 Electrical loads shall be classified according to the requirements for power supply reliability and the extent of impact that power outages may have on human safety and economic losses, and shall comply with the following provisions: 1 A load shall be regarded as a Class 1 load under one of the following circumstances. 1) When a power outage could cause injury or death. 2) When power interruption will cause significant economic losses. 3) A power outage will affect the normal operation of important electrical consumers. 2 Among primary loads, those for which a power outage would cause severe damage to equipment or lead to situations such as poisoning, explosions, and fires, as well as those in particularly important locations where a power outage is not permissible, should be regarded as especially important loads among primary loads. 3 It shall be considered a Class II load when it meets one of the following conditions. 1) When power interruption will cause significant economic losses. 2) A power outage will affect the normal operation of more important electrical consumers.