Views: 0 Author: Site Editor Publish Time: 2022-07-29 Origin: Site
Miniature circuit breakers can be used for overload and short-circuit protection of lighting, distribution lines and equipment in office buildings, residences and similar buildings, and can also be used for infrequent on-off operations and conversions of lines. It is mainly used in various places such as industrial, commercial, high-rise and residential buildings.
What are the precautions for the installation of miniature circuit breakers?
How does a miniature circuit breaker work?
What is the difference between a miniature circuit breaker and an air switch?
1) The installation of the circuit breaker shall comply with the requirements of safety standards and product manuals.
2) The installation of the circuit breaker should fully consider the power supply line, power supply mode, power supply voltage and system grounding type.
3) The rated voltage, rated current, short-circuit breaking capacity and breaking time of the circuit breaker shall meet the requirements of the protected power supply line and electrical equipment.
4) The installation and wiring of the circuit breaker should be correct. In the single-phase, three-phase three-wire and three-phase four-wire power supply systems of different system grounding forms, the wiring of the residual current protector is different, and full attention should be given.
The working principle of the miniature circuit breaker: after the miniature circuit breaker is closed, in the normal working state, the internal bimetallic sheet is heated by a certain current, and the thermal expansion coefficient of the two sheets is different, which leads to bending. When the line reaches the overload current, the bending angle of the bimetallic sheet is large and pushes the tripping mechanism, so that the small circuit breaker trips and plays the role of overload protection.
1. Function difference:
Air switch generally plays the role of "isolation" and "protection device" in small current circuits, also called automatic switch, also called air circuit breaker.
The circuit breaker brand products have good arc extinguishing ability, and automatically trip when the circuit is short-circuited and high-current; in high-voltage and high-current circuits, it is often used as an operating appliance for power failure, power transmission, and load connection and disconnection.
2. Differences in voltage levels:
Generally, the voltage level of the air switch is below 500V, and the circuit breaker can usually be used for each voltage level above 220V.
3. The ability to interrupt current is different:
Generally, the load and short-circuit current that the circuit breaker can withstand is larger.
4. The difference between arc extinguishing medium and method:
The arc extinguishing medium and method of circuit breakers include not only air circuit breakers, but also vacuum circuit breakers, multi-oil circuit breakers, fewer oil circuit breakers, and sulfur hexafluoride circuit breakers.
We can see the huge role that miniature circuit breaker play in the information and communication industry, and they have become indispensable components. And Zhejiang Shilong Electric Technology Co., Ltd., a Chinese pioneer in circuit breakers, has committed to providing the most suitable miniature circuit breaker at a reasonable price, and whatever it takes to satisfy the customer’s needs.
