Circuit breaker auxiliary switch: principle analysis and function detail

Circuit breaker auxiliary switch is an important electrical equipment in power system, it plays a vital role in protecting the circuit and equipment safety. This article will give you a detailed introduction to the circuit breaker auxiliary switch principle, function and application, and in-depth analysis of its working principle and characteristics.

First, the basic principle of circuit breaker auxiliary switch

Circuit breaker auxiliary switch mainly realizes the control and protection of the circuit by monitoring the switch status and electrical signal of the circuit breaker. It usually consists of a control circuit, a contact system and an operating mechanism. When the circuit breaker is in normal working state, the auxiliary switch transmits the corresponding signal by closing or disconnecting the contact to realize the control and monitoring of the circuit breaker.

Second, the function of circuit breaker auxiliary switch

1. Monitoring circuit breaker status: Through the auxiliary switch, the opening and closing status of the circuit breaker can be monitored in real time, and timely feedback to the operator or control system.

2. Remote control: The auxiliary switch can transmit the switch status signal to the control system to achieve remote control of the circuit breaker and improve the flexibility and efficiency of operation.

3. Auxiliary protection function: The auxiliary switch can be used to realize the monitoring of current, voltage, temperature and other parameters. When there is an abnormal situation, the corresponding protection measures are triggered in time to protect the safety of the circuit and equipment.

4. Diagnosis and maintenance: The auxiliary switch can diagnose and maintain the status of the circuit breaker, such as detecting contact wear and measuring the current size.

Third, the working principle of the circuit breaker auxiliary switch

1. Contact system: The contact system of the auxiliary switch is usually composed of normally closed contacts and normally open contacts. When the circuit breaker is in the closed state, the normally closed contact is closed, and the normally open contact is disconnected. When the circuit breaker is in the off state, the normally open contact is closed, and the normally closed contact is closed. By monitoring the status of these two sets of contacts, the opening and closing of the circuit breaker can be obtained.

2. Control circuit: The control circuit of the auxiliary switch is responsible for receiving the status signal of the contact, and then transmitting the signal to the control system to realize the control and monitoring of the circuit breaker.

Fourth, circuit breaker auxiliary switch application field

Circuit breaker auxiliary switch is widely used in power system, industrial production, building installation and other fields. In the power system, it can monitor and control the running state of the power equipment to protect the safe and stable operation of the system; In industrial production, it can realize automatic control and remote operation to improve production efficiency; In building installation, it can be used for circuit protection and energy metering.

To sum up, the circuit breaker auxiliary switch is an indispensable and important equipment in the power system, which realizes the control and protection of the circuit by monitoring the switch status and electrical signal of the circuit breaker. It has the functions of monitoring circuit breaker status, remote control, auxiliary protection and diagnostic maintenance. It is widely used in the fields of power system, industrial production and building installation. Understanding the principle and function of circuit breaker auxiliary switch is of great significance to improve the safety and reliability of power system.