What is the principle of generator automatic air switch?

There are many types of automatic air switches, and the construction is more complicated, but the working principle is basically the same, and his configuration is a contact system, an arc system, protective device and transmission mechanism, and the like, and the contact system has a transmission mechanism. The hook is closed and the power supply and load are turned on, so that the electrical equipment is functioning, the overflow coil and the load electric furnace are connected in series, the undervoltage coil and the load electric furnace are connected in parallel. At normal operation, the magnetic force of the overline coil is insufficient to allow the core to be blended, and the magnetic flanity of the undervoltage coil makes the core, and when the fault exceeds the rated load or short-circuit usage, overcurrent The coil is immediately suction and iron core, the iron core is open to the top of the tower to open the circuit segment. If the voltage is lowered, the absorption of the undervoltage coil is reduced. The armature is protropoosed, and the lever is also opened to the electric furnace. In addition to this, a thermal relay is also contained as overload protection. When the load is overloaded, hesitated biplastic sheets are bent, and the tower is sanded open, so that the contacts are disconnected. Overload protection.