What are the three-phase air switch models? Introduction to common detection methods

Switches are everywhere in our daily lives, but most people think of light switches or appliance switches when they hear the word "switch." However, there is another type of switch that plays a critical role in electrical safety—three-phase air circuit breakers. These devices are not for control purposes, but rather serve as essential safety tools that automatically cut off power when an overload or short circuit occurs, protecting both people and property.

Understanding the Working Principle of Three-Phase Air Circuit Breakers

As society advances and industrialization accelerates, three-phase air circuit breakers have become more common. Despite the variety of models available on the market, their basic working principle remains similar. There are three main tripping mechanisms: thermal, electromagnetic, and combined (thermal + electromagnetic). In case of an overload, the heat generated by the current causes a bimetallic strip to bend, which then triggers the mechanism to trip. For sudden short circuits or severe overloads, the electromagnetic coil generates a strong magnetic field, pulling the armature and causing the breaker to trip instantly.

Common Models and Specifications of Three-Phase Air Circuit Breakers

With the growing demand for electrical safety, three-phase air circuit breakers come in various specifications. The DZ series is one of the most commonly used types. Common models include C16, C25, C32, C40, C60, C80, C100, and so on. The letter "C" indicates the trip current level. For example, a 6500W water heater typically requires a C32 circuit breaker, while a 7500W or 8500W unit may need a C40. In industrial settings, larger models like DW and DZ series are widely used, with ratings ranging from 20A to 800A.

Routine Testing and Installation Tips for Three-Phase Air Circuit Breakers

To ensure safe and reliable operation, regular testing of three-phase air circuit breakers is essential. In residential settings, it's recommended to install separate circuit breakers for sockets, lights, refrigerators, air conditioners, and other high-power appliances. For example, if the wire size is over 4mm², a 20A breaker is suitable, whereas a 16A breaker may be sufficient for general use. Choosing the right model based on your specific needs is crucial to avoid overloading and ensure proper protection.

As technology continues to evolve, the range of three-phase air circuit breakers has expanded significantly. They can be classified based on their switching methods, physical size, or structural design. Whether you're looking for a standard household model or a heavy-duty industrial version, selecting the right product is key to ensuring effective protection against electrical faults. Always refer to technical specifications and consult professionals when making installation decisions to achieve optimal performance and safety.