Electric encyclopedia: Low voltage electrical industry definition and classification

Low-voltage electrical industry definition? Low-voltage electrical appliances are devices or devices that can be switched on or off manually or automatically based on external signals and requirements to switch, control, protect, detect, change and regulate electrical or non-electrical objects. Low-voltage electrical industry definition and classification are as follows. Control of electrical appliances according to the level of their working voltage to AC 1200V, DC 1500V for the community, can be divided into high-voltage control and low-voltage control appliances two categories. In general, low-voltage electrical appliances can be divided into two major categories of electrical distribution and control appliances, is the basic components of complete electrical equipment. In the industrial, agricultural, transportation, defense and people's electricity sectors, the majority of low-voltage power supply, the quality of electrical components will directly affect the reliability of low-voltage power supply system.

Low-voltage electrical industry definition

According to 2014-2019 China's low-voltage electrical appliance industry market status quo and investment strategy analysis report to understand that we usually refer to the life of low-voltage electrical equipment refers to the 380 / 220V power grid to undertake on-off control of the equipment.

Low-voltage electrical industry classification

A wide range of low-voltage electrical appliances, there are many ways to categorize.

1. Press action can be divided into:
(1) Manual electrical appliances - electrical appliances that switch directly by external force, such as knife switches, push-button switches, etc.

(2) Automatic electrical appliances - electrical appliances that rely on commands or changes in physical quantities to act automatically, such as contactors, relays, etc.

According to use can be divided into:
(1) Low-voltage control electrical appliances - mainly in the low-voltage power distribution systems and power equipment play a controlling role, such as knife switch, low voltage circuit breakers.

(2) Low-voltage protection appliances - mainly in the low-voltage distribution systems and power equipment play a protective role, such as fuses, thermal relays.

According to the type can be divided into:
Knife switch, blade switch, fuse, low voltage circuit breakers, contactors, relays, the main electrical appliances and automatic switch.