Low-voltage circuit breakers are an essential protective device in low-voltage power distribution networks. Many people do not understand their functions. What are the protective features of low-voltage circuit breakers? How do you choose a residential circuit breaker? Find out now!
What Protection Functions Do Low-Voltage Circuit Breakers Offer?
The low-voltage circuit breaker offers multiple functions. 1. Short-circuit protection, which creates a short circuit in the unbalanced potential conductor and provides protection by cutting off power. 2. Overload protection refers to the protective measure of cutting off power due to line overheating and damage. 3. Voltage loss protection: When the voltage is too low and the circuit cannot operate normally, power should be cut off to prevent equipment overload and burning. Additionally, the low-voltage circuit breaker can automatically disconnect and protect when overloads, faults, and leakage occur in circuits, machine tools, and other equipment.
Low-voltage circuit breakers, also known as automatic switches, offer not only full-load breaking capacity but also protection functions against short circuits, overloads, and under-voltage losses, with excellent arc-quenching capabilities. Consequently, they are primarily used as main switches in distribution boxes. However, they should not be operated frequently and are suitable only for lighting distribution boxes or control equipment that is not frequently operated.
How to Choose a Residential Circuit Breaker:
Due to the low current in the lighting circuit, a circuit breaker with a lower current rating can be selected. Avoid choosing one with an excessively high current rating. Otherwise, if the current does not reach the standard, the circuit will not disconnect, posing a danger. It is recommended to choose a 10-16A rating.
2. For high-power appliances such as water heaters and air conditioners, you can opt for a residual current circuit breaker, such as a 16-25A breaker.
3. For standard socket wiring, due to the wide range of power consumption, additional equipment may be added at any time. Therefore, it is recommended to choose a circuit breaker with a rating of 16-20A.
4. For live wire lines only, a single-pole circuit breaker can be chosen to prevent leakage. The dual circuit breaker is primarily used to control two lines at the main switch, such as for high-power appliances like air conditioners.
