circuit breaker is a switching device that distributes electrical energy and protects power lines and motors. When the circuit load occurs, the circuit breaker can automatically cut off the circuit to achieve the purpose of protection, avoid further safety risks, and play an important role in household electricity and industrial production. We often see circuit breakers marked 1P, 2P, 3P and 4P. What do these characters represent? The following is the answer from the editor of the one-stop procurement platform of Xinteng mro industrial products.
The 1P circuit breaker we often say refers to the circuit breaker with one protective pole; the 2P circuit breaker refers to the circuit breaker with two protective poles, and so on. The simplest difference between them: 1P circuit breaker can only open one line alone, 2P circuit breaker can open two lines at the same time, and 3P circuit breaker can open three lines at the same time. Let's take a look at their specific applications:
①1P circuit breaker is often used in situations where only one live wire needs to be disconnected, such as using a 1P circuit breaker to control the live wire of a lighting circuit;
②2P circuit breaker is often used to disconnect two live wires at the same time. In the case of line, such as single-phase 220V socket, single-phase 380V welding machine, etc.
Product recommendation: circuit breaker
③3P circuit breaker is usually used in occasions where three wires need to be disconnected at the same time. Since ground wire does not need switches, 3P circuit breakers are mainly used for three-phase electrical equipment, such as: three-phase motors, three-phase welding machines, etc.
④4P circuit breakers are often used in occasions where four lines need to be disconnected at the same time, mainly for low-voltage distribution lines, such as: floor master switch, workshop master switch, three-phase five-wire electrical equipment master switch, etc.
If the wrong type of circuit breaker is selected, it will not be able to play an effective protective role, and may also cause major safety problems. Therefore, when selecting a circuit breaker, you must choose it according to the usage scenario.
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