The Role Of Circuit Breakers
Circuit breaker plays a vital role in the circuit. Its main function is to protect the safety of circuits and equipment, while ensuring the safety of personnel and the stable operation of the power system. The following are the main functions of circuit breakers:
1. Protect circuit and equipment safety
Overload protection: When the current in the circuit exceeds the normal operating current, the circuit breaker will quickly cut off the circuit to prevent the equipment from being damaged or causing a fire due to overload.
Short circuit protection: When a short circuit occurs in the circuit, the circuit breaker can respond quickly and cut off the circuit to prevent the short-circuit current from causing further damage to the circuit and equipment.
Undervoltage protection: When the voltage drops abnormally, the circuit breaker will automatically cut off the circuit to protect the equipment from undervoltage.
2. Ensure personnel safety
Cut off the power supply: In an emergency (such as equipment failure or electric shock), the circuit breaker can quickly cut off the power supply to reduce the risk of personal injury.
Isolate the circuit: When inspecting or maintaining equipment, the circuit breaker can isolate the circuit to ensure safe operation and prevent accidental electric shock.
3. Reasonable distribution of electric energy and remote control
Distribution of electric energy: Circuit breakers can be used to distribute electric energy to ensure that each electrical device obtains a stable and appropriate supply of electric energy.
Remote control: Some circuit breakers support remote control functions, and realize automatic control and remote monitoring through electrical signals or communication lines.
4. Improve the stability of the power system
Isolate the fault part: The circuit breaker can isolate the faulty circuit and allow other parts to continue to work normally, thereby maintaining the stable operation of the power system.
Breaking capacity: The circuit breaker can safely disconnect the circuit under abnormal current, and its breaking capacity is usually much higher than the rated current, ensuring reliable operation in the case of a short circuit.
5. Other functions
Ground fault protection: Some advanced circuit breakers have the ability to detect and disconnect ground fault currents to prevent the risk of electric shock caused by the live housing of the equipment.
Safe operation: Circuit breakers are usually equipped with clear operating instructions (such as handle or switch position) to facilitate users to safely operate the circuit connection and disconnection.
To sum up, circuit breakers are not only the "safety guards" of the power system, but also play an important role in power distribution, equipment protection and personnel safety.
