There are four states of electrical equipment: operation state, hot standby state, cold standby state, and maintenance state. I'm sure everyone is familiar with them. Today I will briefly talk about the specific meaning of these four states.
1、 Operation status
The first is the operation status of electrical equipment. This state refers to the state that the circuit breaker and disconnector (fuse, load switch, etc.) connected to the equipment are in the closed and on position, the equipment has been provided with nominal voltage, and the relay protection, automatic device and control power supply meet the equipment operation requirements.
2、 Hot standby status
The second is the hot standby state. The so-called hot standby state means that the electrical equipment has met the operating conditions, but the equipment has not been charged; There is only one disconnection point on each side connecting the equipment; The state that the relay protection, automatic device and control power supply meet the equipment operation requirements.
3、 Cold standby status
Cold standby state means that the circuit breaker and disconnector (fuse, load switch, etc.) connected to the equipment are in the off position, and the relay protection, automatic device and control power supply are out of operation; There are no safety measures on each side connecting the equipment, and there is no voltage on each side of the equipment.
4、 Maintenance status
The maintenance status refers to that all circuit breakers and disconnectors of electrical equipment are disconnected, and the electrical operator on duty arranges safety measures according to the requirements of the Electric Safety Work Regulations and the work ticket.