What are the types of circuit breaker protectors How each type works

A circuit breaker protector is required for every high-rise building or family home that has a power supply installed. What exactly is it? It can be said that it is just a device that protects the power supply and prevents the risk of a person being electrocuted or electrocuted. It is a switching device that is capable of switching off, carrying and breaking the current under normal circuit conditions and can switch off, carry and break the current under abnormal circuit conditions for a specified period of time. In a circuit installation, it is mandatory to have a switching device. It usually controls the circuit of an entire building or an office area. Here we will learn about the circuit breaker protector.

Circuit Breaker Protector-Basic Concept

Circuit breakers, also known as air switches, are a very basic low-voltage electrical appliance, circuit breakers have the ability to protect the line and power supply with overload, short-circuit and under-voltage protection. It can be used to distribute power, infrequent start asynchronous motors, power lines and motors and other protection, when they have a serious overload or short-circuit and under-voltage faults can automatically cut off the circuit, its function is equivalent to a combination of fuse-type switches and over- and under-thermal relays. Moreover, there is no need to change the parts after breaking the fault current, so it has been widely used. Once the current flow in the house wiring is too high, this simple circuit device cuts off the power supply until the fault is removed. The reason that home electricity would be so inconvenient without circuit breakers (or their replacement, fuses) is that wiring problems and equipment failures alone can cause fires and other accidents.

How Circuit Breaker Protectors-Basic Work

Basic: The simplest type of circuit protector is a fuse. A fuse is just a very thin wire with a protective cover that is connected to the circuit. When the circuit is closed, all current must flow through the fuse - the current at the fuse is the same as at all other points on the same circuit. The fuse is designed so that it will blow when the temperature reaches a certain level. Blowing the fuse can cause an open circuit, which prevents excess current from damaging the house wiring. The problem with a fuse is that it only works once. Whenever a fuse is blown, it must be replaced with a new one. A circuit breaker can perform the same function as a fuse, yet it can be used over and over again. It can cause an open circuit as soon as the current reaches a dangerous level.

Basic type works: the fire wire in the circuit is connected to both ends of the switch. When the switch is placed on, current flows from the bottom terminal, through the electromagnet, moving contactor, static contactor, and finally from the top terminal. The current magnetizes the electromagnet. The magnetic force produced by the electromagnet increases as the current increases and decreases if the current decreases. When the current jumps to a dangerous level, the electromagnet generates a magnetic force large enough to pull on a metal rod attached to the switch linkage. This causes the moving contactor to tilt and move away from the static contactor, which then cuts the circuit. The current is then interrupted. The bimetallic bar design is based on the same principle, with the difference that instead of energizing the electromagnets, the metal bar bends itself under high currents, which then activates the linkage. There are also circuit breakers that rely on filling with explosive material to displace the switch. When the current exceeds a certain level, it ignites the explosive material, which in turn actuates a piston to open the switch.

How Circuit Breakers-Enhanced Work

Enhanced: more advanced circuit breakers do away with simple electrical devices and instead use electronics (semiconductor devices) to monitor current levels. The ground fault circuit interrupter (GFCI) is a new type of circuit breaker. This type of circuit breaker not only prevents damage to house wiring, but it protects people from electric shocks.

Enhanced principle of operation: The GFCI constantly monitors the current on the zero and fire wires in the circuit. When all is well, the current on both wires should be exactly the same. Once the fire wire is directly connected to ground (e.g., if someone accidentally touches the fire wire), the current on the fire wire suddenly surges, while the current on the zero wire does not. The GFCI detects this and immediately cuts off the circuit to prevent electric shock injuries and deaths. Because GFCIs don't have to wait for the current to rise to a dangerous level before they can take action, they react much faster than conventional circuit breakers.

Through the above introduction, we understand the basic concept of the circuit breaker protector, and also know that the circuit breaker protector is two types to choose from, such as the basic circuit breaker protector and enhanced circuit breaker protector, the above also introduces us to the basic circuit breaker protector and enhanced circuit breaker protector's basic principle of operation, so that we will be more clear and understand. At the same time, we can buy according to their actual needs to buy. When shopping we can also ask for advice from relevant sales staff, and of course, I hope you understand the above.

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