Brand - Hydraulic Circuit Breaker - Agent [Weikewei]

Circuit breakerAccording to their usage scope, they can be divided into high voltage circuit breakers and low voltage circuit breakers. Generally, those above 3kV are referred to as high voltage electrical appliances. Low voltage circuit breaker, also known as automatic switch, commonly known as "air switch", also refers to low-voltage circuit breaker. It is an electrical appliance that has both manual switching function and automatic protection against voltage loss, undervoltage, overload, and short circuit. It can be used to distribute electrical energy, start asynchronous motors infrequently, protect power lines and motors, etc. When they experience serious overload, short circuit, undervoltage and other faults, it can automatically cut off the circuit. Its function is equivalent to a fuse switch and over/under heatingrelayThe combination of waiting. Moreover, after breaking the fault current, there is generally no need to change the components, which has been widely used.

Basic type: The simplest circuit protection device isFuse. A fuse is a very thin wire that is connected to a circuit with a protective cover. After the circuit is closed, all current must flow through the fuse, and the current at the fuse is the same as the current at other points on the same circuit. The design of this fuse is to enable it to melt when the temperature reaches a certain level. Burning the fuse can cause an open circuit, thereby preventing excessive current from damaging the wiring of the house. The drawback of a fuse is that it can only function once. Every time a fuse is blown, it must be replaced with a new one. Circuit breakers can serve the same purpose as fuses, but can be reused repeatedly. As long as the current reaches a dangerous level, it can immediately cause an open circuit.

Basic working principle: The live wire in the circuit is connected to both ends of the switch. When the switch is in the on state, current flows out from the bottom terminal, sequentially through the electromagnet, moving contactor, static contactor, and finally out from the top terminal.electric currentCapable of magnetizing an electromagnet. The magnetic force generated by the electromagnet increases with the increase of current, and if the current decreases, the magnetic force will also weaken. When the current jumps to a dangerous level, the electromagnetic body will generate sufficient magnetic force to pull the metal rod connected to the switch linkage device. This will cause the moving contactor to tilt and leave the static contactor, thereby cutting off the circuit. The current was also interrupted. The design of bimetallic strips is based on the same principle, but the difference is that there is no need to give energy to the electromagnet here. Instead, the metal strip is allowed to bend on its own under high current, and then the linkage device is activated. There are still someCircuit breakerBy filling the switch with explosive materials, when the current exceeds a certain level, it will ignite the explosive material and then drive the piston to open the switch.