What role do low voltage circuit breakers play?

low voltage circuit breakers are widely used in low voltage power distribution systems at all levels, to control the power of various mechanical devices, and to control and protect power connections.

• What role do low voltage circuit breakers play?

• What are the relevant parameters of low voltage circuit breakers?

• What types of low voltage circuit breakers are there?

What role do low voltage circuit breakers play?

low voltage circuit breakers refer to mechanical switching electrical appliances that can connect, charge and disconnect current under normal circuit conditions and can be connected, charged and disconnected for a specified period of time under certain abnormal circuit conditions. Perform switching operations on power distribution circuits, motors or other electrical equipment to perform a protective function according to the specified conditions. In other words, it is a switch that can automatically interrupt the circuit if overload, short circuit or undervoltage occurs during the flickering of the circuit.

low voltage circuit breakers are used to distribute current, prevent the frequent operation of asynchronous motors, power lines and motors, etc. protect and automatically shut off circuits in case of major overloads, short circuits, undervoltages and other errors and combine fuse load switches and overheating relays. In addition, no parts need to be replaced after the residual current is interrupted. It's widespread now.

What are the relevant parameters of low voltage circuit breakers?

1.The model of low voltage circuit breaker is generally composed of text symbols and numbers according to the national technical standards as follows:

2.The letter number of the product is represented by the following letters. s%)fewer oil switches; d. circuit breakers for more oil k. circuit breakers for air L. circuit breakers for sulfur hexafluoride; Z. Vacuum circuit breakers; Q. Gas generator circuit breaker; C. Arc deflection circuit breaker.

3. Installation location code; n---inside, w---outside.

4. serial number of the design series; represented by points 1, 2, 3.

5. Rated voltage, KV.

6.Other supplementary work characteristics identification, G-enhanced, F-phase separated operation.

7. Rated current, A.

8. Rated switching current, KA.

9. Special environment code. Fingers empty like DZ47-63. DZ47LE-63 with leakage. C16: refers to the current of 16A. Residents of normal households use C10-16, and the construction uses C32 or higher.

What types of low voltage circuit breakers are there?

1) (Mechanical) circuit breaker

A mechanical switchgear capable of generating, conducting and interrupting current under normal circuit conditions and capable of generating, conducting, conducting and interrupting current even under certain abnormal circuit conditions (e.g., short circuit). Formerly known as: Automatic Switch

2) Universal circuit breaker

A circuit breaker that integrates all components with a frame structure base with insulating pads and has various structural changes and uses.

Formerly known as: Frame Type Automatic Switch

3) circuit breaker with plastic housing

A circuit breaker with a housing made of molded insulating material and all components assembled in one. Synonym: compact circuit breakers

Formerly known as: Automatic switch with plastic housing

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