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Electric Components Extensive Use
May 15, 2017

Electrical components Electric Components are electrical apparatus for connecting and disconnecting circuits or regulating, controlling and protecting circuits and electrical equipment. The automatic control system, which is composed of controlled electrical appliances, is called the relay-contactor control system, referred to as electrical control system.

Electrical appliances are widely used, Electric Components diverse functions, a wide variety of structures. Here are some common types of electrical appliances.

1. Classified by working Electric Components voltage level

(1) High voltage apparatus for Electric Components AC voltage 1200V, DC voltage 1500V and above the electrical circuits. For example, high voltage circuit breakers, high-pressure isolating switches, high-voltage fuses, etc.

(2) Low-voltage electrical Electric Components appliances for AC 50Hz (or 60Hz), rated voltage as 1200V below, DC rated voltage 1500V and the following circuits in electrical appliances. such as contactors, relays, etc.

2. Classification by Action principle

1 manual electrical Electric Components appliances, such as manual switches, control buttons, stroke switches and other main electrical appliances, or rely on mechanical power to operate the electrical appliances.

2 Automatic electrical Electric Components appliance with the help of electromagnetic force or a certain physical quantity change automatically operates electrical appliances, such as contactors, various types of relays, solenoid valves, etc.

3. Classified by use

(1) Control electrical Electric Components appliances used in various control circuits and control systems of electrical appliances, such as contactors, relays, motor starter and so on.

(2) The main electric appliance is used in automatic control system to send the action instruction of electrical appliances, such as buttons, stroke switches, Electric Components universal switching switches and so on.

(3) Protection of electrical appliances for the protection of circuits and electrical equipment, such as fuses, thermal relays, various protective relays, lightning arrester and so on.

(4) An electrical appliance used to accomplish a certain action or transmission function, such as electromagnet, electromagnetic clutch, etc.

(5) Electrical appliances for the Electric Components transmission and distribution of electric power, such as high voltage circuit breakers, isolating switches, knife switches, automatic air switches, etc.

4. Classification by Working principle

1 Electromagnetic electric appliance according to electromagnetic induction principle to work, such as contactor, various types of electromagnetic relays and so on.

2 non-electric control electrical appliances rely on external forces or some kind of non-electrical physical changes in the action of electrical appliances, Electric Components such as knife switches, stroke switches, buttons, speed relays, temperature relays and so on.

(ii) The role of electrical appliances

Low-voltage electrical apparatus can Electric Components automatically or manually change the state and parameters of the circuit according to the requirements of the operating signal or the external scene signal, and realizes the control, protection, measurement, indication and regulation of the circuit or the controlled object. The effect of low voltage electrical apparatus is:

(1) Control function such as elevator up and down, speed automatic switching and automatic stopping layer.

(2) protection can be based on the Electric Components characteristics of equipment, equipment, environment, and physical protection of automatic, such as motor overheating protection, power network short-circuit protection, leakage protection.

(3) Measuring the use of instruments and the adaptation of electrical appliances, equipment, power grids or other non-electrical parameters, such as current, voltage, power, rotational speed, temperature, humidity and so on.

(4) regulating effect of low-voltage electrical appliances can be adjusted for some of the electricity and non-electricity to meet the requirements of users, Electric Components such as diesel engine throttle adjustment, room temperature and humidity adjustment, illuminance automatic adjustment.

(5) Indication of the use of low-voltage electrical control, protection and other functions, detection of equipment operating conditions and electrical circuit work, such as insulation monitoring, protection of licensing instructions.

(6) conversion between electrical equipment or to low-voltage electrical appliances, control circuit time-sharing put into operation to achieve functional switching, such as the excitation device manual and automatic conversion, power supply and power-owned switching.

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