definition, composition, function, classification and main technical parameters of low-voltage switchgear box
What is a low voltage switchgear box
When it comes to low-voltage switchgear, most of the friends who have been in the electrical industry for many years are no strangers. But for a friend who has just entered the electrical industry, there may be fog in the clouds. So what is a low voltage switchgear? The low-voltage switchgear is a collection device for switches, which can well control the power supply of corresponding equipment. Low-voltage switchgear is suitable for power plants, petroleum, chemical industry, metallurgy, textiles, high-rise buildings and other industries, as power transmission, power distribution and power conversion.
Composition of low voltage switchgear box
One or more low-voltage switchgear and related control, measurement, signal, protection, regulation and other equipment, all internal electrical and mechanical connections are completed by the manufacturer, and a combination is completely assembled with structural components body.
The main components of the low-voltage switchgear are as follows:
Cabinet body: the shell skeleton of the switch cabinet and the internal installation and support parts
Busbar: A low-impedance conductor that can be connected separately to several circuits
Functional unit: all electrical equipment and mechanical components that perform the same function (including incoming line units and outgoing line units)
Functions of low voltage switchgear box
① Electric energy distribution conversion
③Reactive power compensation
④Protection against electric shock (direct and indirect contact)
⑤ Protect equipment from external environmental influences
Classification of low voltage switchgear
Structural classification of low-voltage switchgear Low-voltage switchgear is divided into two types: fixed low-voltage switchgear and withdrawable low-voltage switchgear according to different structures. The characteristic of the fixed low-voltage switchgear is that all the components in the switchgear have been installed and reliably fixed in a certain position. The fixed switchgear mostly adopts cubic cabinets such as screen type and box type, and some of them use edge-shaped cabinets such as desktops. Fixed low-voltage switchgear can be used in a single row or in a row. The withdrawable low-voltage switchgear cabinet mostly adopts a fixed form, and there are movable electrical components inside. These electrical components are light in weight and can be moved and placed relatively easily. Therefore, the application of the withdrawable low-voltage switchgear is more flexible. Withdrawable low-voltage switchgear requires reliable positioning of moving parts, replaceable drawers, and stable cabinets, so the manufacturing cost is relatively high.
Technical parameters of low voltage switchgear
①Rated current (usually the same size as the incoming switch)
②Rated voltage/Rated insulation voltage (400/1000V)
③The way of entering and exiting the line
④Rated short-time withstand current (Icw/1s)
⑤Division of functional areas inside the cabinet (isolation method)
⑥Enclosure protection level
⑦Installation location and method
⑧Dimensions (related to the user site area)
⑨Color and surface treatment
The above is the definition, composition, function, classification and main technical parameters of the low-voltage switchgear introduced by the Chinese switchgear box manufacturer. I hope it can help you. For more information about low-voltage switchgear, please continue to follow us.