What is the role of residual current circuit breaker?

The residual current circuit breaker is determined by the characteristics of the leakage detection element, the residual current transformer. The residual current transformer has a toroidal core, the secondary coil is wound on the core, and the primary coil is the wire passing through the inner hole of the core.

• What does the residual current of the residual current circuit breaker mean?

• What is the importance of the use of residual current circuit breaker?

• What is the role of residual current circuit breaker?

What does the residual current of the residual current circuit breaker mean?

Residual current that can activate the residual current protection device

Residual operating current refers to the residual current that can activate the residual current protection device. Residual current refers to the vector sum of the instantaneous values of the main circuit current flowing through the residual current protection device. Residual current time, residual current of electrical equipment, etc.

residual current circuit breaker. A residual current circuit breaker is a mechanical switch that detects residual current, compares the residual current value with a reference value, and disconnects the main circuit contacts when the residual current value exceeds the reference value. residual current circuit breakers have overload and short circuit protection, and some residual current circuit breakers can also have overvoltage protection.

What is the importance of the use of residual current circuit breaker?

When the vector sum of the current flowing through the transformer in the protector is not equal to zero, there is a difference between it and the return current flowing through the neutral line, and this difference is the residual current value. If the difference is higher than the rated operating current of the residual current circuit breaker, the residual current circuit breaker will trip, thereby cutting off the power.

The quality of the residual current circuit breaker will be directly related to the safety of the user's life and property. In the low-voltage power distribution system, the installation of qualified residual current circuit breakers is an effective technical measure to prevent electrical fires and electrical equipment damage accidents caused by personal electric shock and leakage. Especially in the rural low-voltage power grid, the residual current circuit breaker has achieved obvious results in reducing personal electric shock casualties and preventing electrical equipment damage.

What is the role of residual current circuit breaker?

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.

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