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2024
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Introduction to the structure and working principle of low-voltage switchgear
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Low-voltage switchgear is a kind of equipment used to control, protect and distribute low-voltage power system.
Low-voltage switchgear is a kind of equipment used to control, protect and distribute low-voltage power system. It is composed of cabinet body, switchgear, bus bar, cable, relay, instrument and so on. It has the characteristics of compact structure, complete function and convenient operation. The following is a brief introduction to the structure and working principle of low-voltage switchgear:
Low voltage switchgear cabinet is generally made of steel plate or aluminum alloy, with good mechanical strength and protection performance. The interior of the cabinet is divided into different units or circuits according to their functions. Each unit or circuit has corresponding switching equipment, buses, cables, relays, instruments, etc. to realize their respective control and protection functions.
● Low-voltage switchgear switchgear mainly includes circuit breakers, load switches, isolating switches, contactors, etc., which are used to connect or cut off the power supply, control the start or stop of the load, and realize the protection of overload, short circuit and other faults. The switchgear generally has two operation modes, manual or automatic, which can be selected and set according to needs.
● The busbar of the low-voltage switchgear is a conductive part connecting each unit or circuit. It is used for transmission and distribution of electric energy and bears a large current. The bus bar is generally made of copper or aluminum, which has good conductivity and heat resistance. Busbars are generally divided into two types: main bus and branch bus. The main bus is connected to the power supply side and the branch bus is connected to the load side.
● The cable of low-voltage switchgear is a conductive part connecting each unit or circuit with external equipment. It is used to transmit signals or electric energy and bears a small current. The cable is generally made of copper core or aluminum core insulated wire, which has good conductivity and insulation. Cables are generally divided into incoming cables and outgoing cables. The incoming cables are connected to the power supply side and the outgoing cables are connected to the load side.
● The relay of low-voltage switchgear is an electrical component used to realize logic control or protection function. It is composed of coils, contacts and mechanical parts, and can change the state of the output signal according to the change of the input signal. Relay is generally used to achieve overcurrent, undervoltage, overvoltage, phase sequence and other protection functions, or to achieve delay, interlock, linkage and other control functions. The low-voltage relay produced by Tai Ang Energy adopts advanced design concept and technical level to improve the sensitivity and reliability of the relay.
The instrument of low voltage switch cabinet is an electrical component used to display or measure various physical quantities. It is composed of indicators, sensors and converters, which can display or output corresponding values or signals according to the change of input signals. Instruments are generally used to display or measure physical quantities such as voltage, current, power, frequency, temperature, etc., or output signals such as alarms or signal lights.
Low-voltage switchgear is a kind of important power equipment, which realizes the effective control and protection of low-voltage power system through various structures and working principles.
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Chongqing Pengda Electric Co., Ltd.
The company is mainly engaged in the research and development, manufacturing, power installation, marketing and foreign trade of high and low voltage complete sets of electrical and automation products.
Telephone：+86 18183180966
Address: 203, Building 3, No. 106, West Section of Jinkai Avenue, Yubei District, Chongqing
Zip Code: 402260
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