3D20UL

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Circuit Breakers

A circuit breaker is an electrical device that is used to prevent an electrical circuit from overloading and causing harm. In this article, we will focus on 3D20UL circuit breakers and their application field and working principle.

Application Field

The 3D20UL circuit breaker is a universal low-voltage circuit breaker that can be used in a wide range of applications. It is mainly used in buildings, houses, industrial, and commercial electrical distribution systems. The 3D20UL circuit breaker is also suitable for residential, institutional and industrial environments, wherever electrical circuit protection is required.

Working Principle

The 3D20UL circuit breaker uses thermomagnetic technology, combining thermal and magnetic elements to provide reliable and optimal short circuit protection with overload protection. When a short circuit occurs, the thermal element acts as a trigger to cause instantaneous operation of the breaker. An excessive current in the circuit causes the temperature of the thermal element to increase quickly, and the conductive bimetallic strip bends downward, operating the mechanism and opening the contacts. The high magnetic field generated by the flow of the high-current arc across the contacts is also used to further assist the breaker in opening or help to stabilize the breaker in the open position.

In addition, the breaker also contains an adjustable overload protection element, which is a rotary push wheel. The wheel provides resilience for certain loads and can protect the electrical circuit from damage due to overload. The wheel is pushed in and out by a pin connected to a bellows element, and when the temperature of the bellows element reaches a certain value due to a current overload in the circuit, the wheel will be pushed out and the contacts will be opened.

Conclusion

In conclusion, the 3D20UL circuit breaker is a reliable and widely used low-voltage circuit breaker, which combines thermal and magnetic elements to provide reliable and optimal short-circuit protection with overload protection. As it is suitable for a wide range of applications, the 3D20UL circuit breaker is an ideal choice for all types of electrical circuit protection.

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