The dual power supplies are divided into manual, self-turn on and self-recovery, and self-turn on and non-self-recovery. The meaning is as follows:
Self-throw and self-recovery. This is the working principle of the dual power transfer switch. When the switch is turned to automatic, when it switches to the backup power, this working method is called automatic switching. It is called the backup power and the backup power is automatically switched on.
It throws itself but never recovers. When the switch is in the double-open state, the mains power and the backup power supply are connected to the switch. When the switch is turned to automatic, the switch is automatically turned on to the mains power supply and the backup power supply is on standby. When the mains power is cut off, the backup power supply is automatically turned on to supply power to the switch. At this time, the mains power comes, and the switch detects the mains voltage signal, but the switch does not automatically turn on the mains power. This means that it switches on and does not reset.
Dual power switch is also called automatic transfer switch. Its function is to switch one or several loads from one power supply to another power supply. Generally used in elevators, fire protection and emergency lighting, etc.
Extended information:
The advantages are as follows:
1. There are reliable mechanical interlocking devices and electrical interlocking protection between the two circuit breakers to completely eliminate The possibility of closing two circuit breakers at the same time is eliminated. The agency has obtained national patent products. The intelligent controller uses a single-chip microcomputer as the control core, with simple hardware, powerful functions, easy expansion, and high reliability.
2. It has short circuit and overload protection functions, automatic conversion function of overvoltage, undervoltage and phase loss and intelligent alarm function. Automatic conversion parameters can be freely set externally. It has intelligent protection function for operating motor. This device is equipped with a fire control circuit. When the fire control center sends a control signal to the intelligent controller, both circuit breakers enter the open state.
Reference: Baidu Encyclopedia-Dual power switch