What is a circuit breaker? A circuit breaker is a switching device that can close, carry and interrupt the current under normal circuit conditions, and close and interrupt the current under abnormal circuit conditions within a specified time.
Top 10 circuit breaker manufacturers:
There are 10 best circuit breaker manufacturers including:
1.ABB: ABB is a Fortune 500 company formed by the merger of Sweden’s ASEA and Switzerland’s BBC Brown Boveri in 1988. It focuses on the industrial and power industries and provides world-leading power and automation technologies.
2.Schneider Electric: Schneider Electric was founded in France in 1836 and is a global energy efficiency management expert dedicated to providing solutions for energy and infrastructure, data centers, etc.
3.Eaton (Ireland): Known for its medium-voltage power distribution solutions, this multifaceted industrial company maintains a dominant position in the circuit breaker market. Their emphasis on arc flash mitigation, safety, and dependability is relevant to a variety of sectors.
4. German engineering and technology giant Siemens AG: Siemens provides a wide range of circuit breakers at different voltage levels. Their emphasis on smart grid technologies and digitization puts them in a position to benefit from future advancements in the sector.
5.U.S. General Electric: This industrial behemoth has a long history of creating inventive and dependable circuit breakers. GE serves a wide range of industries with its high-voltage breakers for power grids and tiny circuit breakers for home appliances.
6.Japan’s Mitsubishi Electric Corporation: Mitsubishi Electric, which is well-known for its high standards and precise engineering, is a leading supplier of dependable circuit breakers for a range of uses, such as renewable energy systems and industrial automation.
7.Honeywell-Lonon: Honeywell-Lonon Electrical Systems Technology (Guangdong) Co., Ltd. was established in 2008 and focuses on the research and development, manufacturing and sales of electrical and lighting products.
8.Legrand (France):Legrand founded in France in 1860, is a world-renowned provider of electrical and intelligent building system solutions and a global professional manufacturer specializing in building electrical and information network products and systems.
9.Omron ：Omron offers a variety of circuit breakers, including electronic breakers, motor-protection circuit breakers, and low voltage switching gears.
10.Rockwell ：Rockwell circuit breakers include industrial DIN Rail circuit breakers, high density miniature circuit breakers, motor circuit protectors, residual current devices.
How Circuit Breakers Work?
The working principle of the circuit breaker is based on the combined action of electromagnetic force and spring force. When the circuit is working normally, the circuit breaker is in a closed state and the current passes through the contacts of the circuit breaker. When the circuit is short-circuited, overloaded or in other abnormal conditions, the protection device inside the circuit breaker will detect the abnormal current, trigger the tripping mechanism of the circuit breaker, and quickly cut off the power supply.
The tripping mechanism of the circuit breaker mainly includes electromagnetic trippers, thermal trippers and electronic trippers. The electromagnetic tripper mainly protects against short-circuit currents, the thermal tripper mainly protects against overload currents, and the electronic tripper can provide comprehensive protection according to the set protection parameters.
When a short circuit occurs in the circuit, the magnetic field generated by the large current overcomes the reaction spring, the tripper pulls the operating mechanism to operate, and the switch trips instantly. When the circuit is overloaded, the current becomes larger, the heat generation increases, and the bimetallic strip deforms to a certain extent to push the mechanism to operate.
In addition, the classification of circuit breakers can be divided according to their use environment and function.
According to the voltage level, circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers. High-voltage circuit breakers are used to break high-voltage and high-current circuits, while low-voltage circuit breakers are used in low-voltage power distribution systems and have functions such as overload, short circuit and undervoltage protection. According to the structural form, circuit breakers can be divided into frame type, plastic shell type and current limiting type.
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