4420.023

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Circuit breakers are extensively used to protect electrical systems and prevent electicity surges from causing damages. 4420.023 is an innovative circuit breaker which is often used to protect an entire electrical system. This article will discuss the application field and working principle of this circuit breaker.

Application Field

4420.023 is a type of circuit breaker used in areas where medium-current (useless current is below 100A) and frequent switching operations are required. It can prevent an entire system from being damaged by electricity surges while still providing high performance and low cost. Under normal circumstances, it is suitable for use in automatic circuits from 6A to 63A, manual circuits from 6A to 45A, 2P circuits from 2A to 45A, and 4P circuits from 6A to 50A.

It is mainly used in the following fields:

• Environment control system and home appliance control system.
• Widely used in motor loads with low overload, such as air-conditioners, refrigerators, washing machines, other automatic control circuits, and lighting systems.
• Widely used in the protection of electrical and electronic equipment.
• It can be used to protect the whole system in dangerous working environment, where electric fire safety is very important.

Working Principle

The 4420.023 circuit breaker works on a principle of a thermal switch similar to regular circuit breakers. With this circuit breaker, the bimetal element reacts to excessive temperature changes and triggers the switch, resulting in the switching off of power. It consists of a bimetal element connected to a spring-loaded contact. The current is then passed through the bimetal element, resulting in a change in temperature. If the current becomes too high, the heat generated by the bimetal element will exceed a certain level that can cause it to bend and break the contact, thus switching off the power supply.

It also has an over-load protection feature. In this protection feature, the bimetal element is arranged in such a way that it remains stable under normal load conditions. Once the load exceeds a certain threshold, the bimetal element bends and breaks the contact, thus switching off the power supply. The over-load protection prevents the circuit from being damaged due to excessive current.

In addition to over-load protection, the 4420.023 circuit breaker also has short-circuit protection. This protection feature is designed to protect the circuit from being damaged due to short-circuiting. If the current reaches a certain short-circuit level, the bimetal element bends and breaks the contact, thus switching off the power supply and preventing the circuit from damage.

The 4420.023 circuit breaker provides reliable protection against over-loads and short-circuiting. It is an innovative and low-cost solution to prevent an entire electrical system from being damaged due to electricity surges and overloads.

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