203-2-1-66-163-4-1-1

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Circuit Breakers

Circuit breakers are essential devices for safety protection of home appliances, as well as protecting industry production equipments and installations. A wide variety of circuit breakers are available on the market to suit various applications, including those with 203-2-1-66-163-4-1-1 type.

Application Field

The 203-2-1-66-163-4-1-1 type circuit breaker is specifically designed for high current applications, making it suitable for an extensive range of protection systems. It provides reliable protection for circuits in the AC or DC power distribution of metallurgical, chemical, electric locomotive, electric power, and general machinery industries. It can also be used for protection of electric equipment, such as motors, transformers, and electric balances. Additionally, it is suitable for arc furnace and various welding machines.

Working Principle

As with all circuit breakers, the 203-2-1-66-163-4-1-1 type circuit breaker consists of two main elements: the thermal element and the electromagnetic element. During the normal working state, the main contacts of circuit breaker are in the closed state, and the current can flow through it normally. However, when an abnormally high current passes, the thermal element will heat up quickly as a result of Joule effect, which causes it to expand and actuate a trigger to open the main contacts.

The electromagnetic element is composed of current-detecting coil and internal magnetic field generated by the current-detecting coil. During the normal condition, the internal magnetic field will be in balance, and thus the reset switch will be at rest. When the current exceeds the rated value, the magnetic field of the current-detecting coil will also increase, which will cause the tapping lever or internal reset switch to actuate and open the main contacts, thus cutting off the current.

Therefore, the 203-2-1-66-163-4-1-1 type circuit breaker combines both the thermal element and electromagnetic element and the two will work together to automatically cut off the current when the current exceeds the rated value. This significantly improves the safety level of the circuits in various industries.

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