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How does residual current circuit breaker work?

Views: 12     Author: Site Editor     Publish Time: 2023-01-02      Origin: Site

How does residual current circuit breaker work?

As a protective electrical appliance, residual current circuit breaker is an effective facility to prevent personal electric shock, electrical fire and damage to electrical equipment.



  • What is the function of residual current circuit breaker?

  • What is the most common residual current circuit breaker in daily life?

  • How does residual current circuit breaker work?




What is the function of residual current circuit breaker?


The residual current circuit breaker can quickly cut off the faulty power supply in a very short time to protect the safety of people and electrical equipment. The residual current circuit breaker is suitable for AC 50Hz or 60Hz, rated voltage single-pole two-wire, two-pole 230V, three-level/three-level four-wire, four-level 400V, rated current up to 60A in the circuit, when personal electric shock or grid leakage current exceeds the specified When the value is reached, the residual current circuit breaker can quickly cut off the fault power supply in a very short time to protect the safety of people and electrical equipment. The residual current operated circuit breaker has the function of preventing people from getting electric shock. According to the IEC standard, the human body will suffer from obvious organ damage and heart fibrillation when the current is 30mA. If the time exceeds 1 second, there will be the danger of electric shock and death. Therefore, in low-voltage power distribution A residual current circuit breaker (RCD) is required in the system, independent of the voltage on the line.



What is the most common residual current circuit breaker in daily life?


Some people have been electrocuted to death while wiring bush trimmers and lawn mowers. We all need to prevent such tragedies, whether in the garden or in our own homes.

The best way to avoid this kind of electrical accident is to install a residual current circuit breaker in the fuse box. This device is able to cut off the current (by breaking the circuit) without any current leakage.


We can also use a single-user residual current circuit breaker (which can be purchased from hardware stores or supermarkets), which already includes the functionality of a residual current circuit breaker. If there is no residual current circuit breaker installed in the fuse box, then install it quickly, it is especially suitable for outdoor electric appliances.



How does residual current circuit breaker work?


The residual current circuit breaker is a relay protection device that can automatically disconnect the circuit or send an alarm signal when the residual current in the protected circuit exceeds the set value under specified conditions. The residual current circuit breaker adopts the protection principle of automatically cutting off the power supply. In direct contact protection, it is used as an additional protection against the basic protection measures against electric shock hazards; in indirect contact protection, it is used as limited protection against electric shock hazards or electrical fire hazards caused by ground faults that cause the exposed conductive parts of electrical equipment to carry dangerous voltages. The residual current circuit breaker is mainly composed of four basic links, namely signal detection, signal processing, actuator and test device. residual current circuit breakers can be used instead of leakage circuit breakers at home, and the principle is basically the same.



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