What is a low-voltage electrical appliance? According to the different ways of action, which two types can it be divided into? What kinds can it be divided into according to different uses? What are t

What is a low-voltage electrical appliance? According to the different ways of action, which two types can it be divided into? What kinds can it be divided into according to different uses? What are the commonly used low-voltage appliances? 1. Low-voltage electrical apparatus is a component or equipment that manually or automatically turns on and off circuits according to external signals and requirements, so as to realize the switching, control, protection, detection, transformation and adjustment of circuits or non-electrical objects.

2, according to the mode of action can be divided into:

(1) Manual electrical appliances-electrical appliances that are directly operated by external forces for switching, such as knife switches and push-button switches.

(2) Automatic electrical appliances-electrical appliances that automatically act according to instructions or changes in physical quantities, such as contactors and relays.

3, according to the purpose can be divided into:

(1) Low-voltage control appliances-mainly play a control role in low-voltage distribution systems and power equipment, such as knife switches and low-voltage circuit breakers.

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

4. Commonly used low-voltage electrical appliances include molded case circuit breakers, control and protection switches, electronic motor protectors, soft starters, etc.

Extended data

The role of low-voltage electrical appliances:

1, control functions, such as elevator moving up and down, automatic speed switching, automatic floor stop, etc.

2, adjustment, low-voltage electrical appliances can adjust some electrical and non-electrical quantities to meet the requirements of users, automatically adjust the illumination, etc.

3, protection, according to the characteristics of equipment, equipment, environment, personal protection.

4. Indication function, which uses the control and protection functions of low-voltage electrical appliances to detect the running state of equipment and the working state of electrical circuits, such as insulation monitoring and protection tripping indication.

Baidu encyclopedia-low-voltage electrics