What is the difference between a low voltage circuit breaker and a high voltage circuit breaker?

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High voltage circuit breaker is a mechanical device. The device can generate, carry and interrupt current under normal conditions. It can also carry and interrupt current in case of short circuit or overload.


The difference between low voltage circuit breakers and high voltage circuit breakers

Low voltage circuit breakers, optimal for use below 2 kV, work primarily in smaller industries.
High voltage circuit breakers serve voltages above this threshold, with transmission class breakers falling under their umbrella.

1.Different usage scenarios:

Low-voltage circuit breakers are used to protect circuits in household appliances and industrial machines, such as air conditioners and televisions; high-voltage circuit breakers are used to protect electrical components in power systems, such as transformers and generators.

2.Function and effect:

Low-voltage circuit breakers are mainly used in AC and DC low-voltage power grids. They can be used to manually or electrically open and close circuits, and can protect circuits or electrical equipment from overload, short circuit, and undervoltage. They can also be used to start motors infrequently.

High-voltage circuit breakers are important equipment used to control and protect high-voltage circuits in power systems. They can automatically detect and cut off high-voltage circuits to ensure safe and stable operation of the system.

3.Structure and type:

There are many ways to classify low-voltage circuit breakers, such as selective type, non-selective type, air type, and vacuum type; high-voltage circuit breakers are composed of a circuit breaker body, an operating mechanism, and an arc chamber, and are divided into outdoor and indoor types according to rated voltage and rated current.

They have their own key roles in various power systems and equipment. Low-voltage and high-voltage circuit breakers have significant differences in rated voltage, design, arc extinguishing technology and application areas. These factors determine their use occasions and requirements in different electrical systems.

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