What are the models of low voltage switchgear

Summary: Switchgear can be divided into high-voltage, medium-voltage, low-voltage three kinds, of which 220v-1kV for the low-voltage system, low-voltage switchgear is suitable for 220v-1kV power system switchgear. Low-voltage switchgear models are numerous, roughly GGD series switchgear, GCK series switchgear, GCS series switchgear, MNS series switchgear, MCS series switchgear and so on, different models of switchgear have their own uses and advantages and disadvantages. Below to learn about the low-voltage switchgear model what it is. A low voltage switchgear is how many volts

Switchgear can be divided into low voltage switchgear and high voltage switchgear according to different voltages, some will also be divided into medium voltage switchgear, then how many volts belong to the low voltage switchgear?

China's more commonly used voltage levels are 220v, 380v, 1kV, 3kV, 6kV, 10kV, 35kV, 66kV, 110kV, 220kV, 500kV, 750kV, etc., of which 220v-1kV for the low-voltage system, 3kV-35kV for the medium-voltage system, 10kV or more for the high-voltage, applying to 220v The switchgear applied to 220v-1kV power system is called low voltage switchgear.

Second, low-voltage switchgear model what

Low-voltage switchgear and control equipment commonly known as low-voltage switchgear, which has a large variety of models can be broadly divided into the following categories:

1, GGD series switchgear

Purpose: Mainly used in substations, power plants, factories and mining enterprises, and other power users of the AC 50Hz, rated voltage, rated current, 380V, rated current, rated current, and so on, the switchgear can be used in the power system. 380V, rated working voltage, rated working current 1000-3150A power distribution system, as power, lighting and power generation and distribution equipment, power conversion, distribution and control.

Structural features: GGD low-voltage distribution cabinet cabinet adopts the form of universal cabinet, the frame is assembled by local welding of 8MF cold-formed steel, and there are 20-mold mounting holes, with high coefficient of universality. And give full consideration to the problem of heat dissipation, the upper and lower ends of the cabinet have different numbers of cooling slots, when the cabinet electrical components heat up, the heat rises, through the upper end of the slots discharged, while the cold air constantly from the lower end of the slots supplemented by the cabinet, so that sealed cabinets from the bottom up to form a natural air duct, to achieve the purpose of heat dissipation.

Advantages and disadvantages: the advantages are simple operation, easy installation and maintenance. Disadvantages are fewer circuits, the unit can not be any combination and large footprint, can not be contacted with the computer.

2, GCK series switchgear

Use: it is mainly applicable to AC 50 (60) Hz, rated voltage less than or equal to 660V, rated current 4000A and the following control of the power distribution system, as power distribution, motor control and lighting and other power distribution equipment.

Structural features: the whole cabinet adopts assembled combination structure, modular hole installation, strong generality of parts, good applicability and high degree of standardization. The upper part of the cabinet is the busbar room, the front part is the electric appliance room, and the back part is the cable inlet and outlet room, and there is a steel plate or insulating plate between each room for isolation to ensure safety.

Advantages and disadvantages: Advantages of the electrical program is flexible, series, versatility, a variety of program units of any combination; and a cabinet, the number of circuits to accommodate more savings in floor space, high level of protection, safety and reliability, easy maintenance. The disadvantage is that the horizontal bus is located in the top of the cabinet, the vertical bus does not have a flame-retardant plastic function board, security is poor.

3, GCS series switchgear

Purpose: Mainly used in three-phase AC frequency of 50Hz, rated voltage of 400V (690V), rated current of 4000A and below, as power, power distribution and motor centralized control, capacitor compensation.

Structural features: the functional rooms of the switchgear are isolated from each other, and the isolation room is divided into functional unit room, busbar room and cable room; the horizontal busbar adopts the flat arrangement behind the cabinet to enhance the busbar's capability of resisting electric power, and it is the basic measure to enable the main circuit to have the capability of high short-circuit strength; the cable compartment is designed to make it convenient for the cables to come in and go out; the drawer change is only in the dimension of the height, and the dimension of the width and depth remain unchanged, and the same functional unit is used as the power control and motor centralization and capacitance compensation. The drawer changes only in the height dimension, the width and depth dimensions remain unchanged, and the drawers of the same functional unit have good interchangeability; the drawer panel has obvious signs for the positions of division, closing, testing, and pulling out.

Advantages and disadvantages: Advantages of a high technical performance indicators, but also has a high breaking, connecting capacity, good thermal stability, electrical program flexible, easy to combine, series of strong practicality, high protection level. Disadvantages are affected by the electrical performance of the insulated plug, process quality, reliability, safety compared to MNS is poor; electrical indicators are slightly inferior to MNS.

4, MNS series switchgear

Purpose: for AC 50-60Hz, rated working voltage 660V and the following power supply system, for power generation, transmission, power distribution, power conversion and power consumption equipment control. control.

Structural features: combined structure, switchgear internal dimensions, component dimensions, compartment dimensions are in accordance with the modular design, high degree of versatility, standardization; each cabinet is divided into a horizontal bus room, drawer room, cable room three rooms, room and room are separated from each other, to effectively prevent the switching components due to faults caused by the flying arc or the bus and other lines caused by a short-circuit accidents; structural design to meet the upper The structure design can satisfy various inlet and outlet programs, such as up in and out, up in and out, down in and out, down in and out, etc. The cabinet can be selected with corresponding protection level according to the requirements of different working environments.

Advantages and disadvantages: Advantages of compact design, the use of standard module design, high technical performance, compressed site. The disadvantage is that the price is higher.

5, MCS series switchgear

Use: it is a fusion of the advantages of other low-voltage switchgear developed for power plants, petrochemical industry, metallurgy, telecommunications and other three-phase AC 50HZ, 60HZ, rated voltage of 380V, rated current of 4,000A and the following three-phase four (five) line system power distribution system.

Structural features: the basic frame of the switchgear cabinet is assembled by C-type (or 8MF-type) open steel, with uniform appearance, high precision and good interchangeability of drawers. With a width of only 600mm, it has a large space for use and can accommodate more functional units, saving construction land.

Advantages and disadvantages: the advantage is that the cabinet components can be configured according to the user's different needs, various types of switches, the device can be reserved for automation interfaces, but also intelligent modules can be installed in the switchgear cabinet. The disadvantage is that the price is more expensive.