shunt trip circuit breaker

A shunt trip circuit breaker is a type of circuit breaker protection device that enables remote tripping of the breaker. Here is a detailed introduction:

 Working Principle

- **Basic Principle**: It essentially consists of a tripping coil and a release mechanism. When a specified voltage is applied to the shunt trip coil, the coil generates a magnetic field, which causes the release mechanism to operate, thereby tripping the circuit breaker and interrupting the circuit.

- **Power Supply and Signal Transmission**: Shunt trip breakers can be connected to an external power source. When a power surge or other abnormal signal is detected by the external power source, it sends a signal to the shunt trip coil of the circuit breaker, triggering the breaker to trip. Additionally, they can be connected to a remote switch. Pressing the button on the remote switch sends an electrical signal through the shunt trip wiring to cut off the power.

 Characteristics

- **Remote Control Capability**: The most prominent feature is the ability to trip the circuit breaker remotely, providing convenience and flexibility for power control in different scenarios. It allows for quick response to emergencies without the need to be physically present at the location of the circuit breaker.

- **Fast Response**: It can quickly cut off the power supply when receiving a tripping signal, usually within a short time (milliseconds - level), thus effectively protecting electrical equipment and circuits from being damaged by over - current, over - voltage, or other faults.

- **Additional Protection**: It serves as an additional protection measure for the circuit breaker, supplementing the basic protection functions such as overload and short - circuit protection of the circuit breaker. For example, in the event of a fire, it can be used to cut off non - fire - fighting power to prevent electrical hazards.

 Application Scenarios

- **Industrial Settings**: In industrial plants, they are used to protect important production equipment and electrical systems. For example, in the event of a power surge, equipment malfunction, or fire, the power supply to the relevant equipment can be remotely cut off through a shunt trip circuit breaker to avoid equipment damage and production disruptions.

- **Commercial Buildings**: In shopping malls, office buildings, and other commercial buildings, they are used to cut off non - fire - fighting power in the event of a fire to ensure the safety of personnel and property. They can also be used for the centralized control and management of the power distribution system to improve the reliability and safety of the power supply.

- **Residential Buildings**: In some high - end residential buildings or buildings with special requirements, shunt trip circuit breakers may be installed. For example, they can be connected to a home security system or fire - fighting system. When a fire alarm or other emergency situation occurs, the power supply can be automatically cut off to reduce the risk of electrical fires.