What are the common types of low-voltage distribution cabinets?

Release time:

2023-03-09

Author:

Source:

Abstract

Common low-voltage distribution cabinets include GCS, GCK, MNS, GGD, and PGL.

The models of low-voltage switchgear include GCS, GCK, MNS, GGD, and PGL.
        
The PGL and GGD models are primarily fixed distribution, while the GCK, GCL, BFC, and MNS models arelow-voltage withdrawable switchgear..
        
PGL model: An indoor low-voltage distribution device with open double-sided maintenance. The basic structure of the distribution cabinet is made of welded steel plates and angle steel. There is a door at the front of the cabinet, and a small door above the cabinet surface for installing indicating instruments. The cabinets are assembled side by side with partitions between them to reduce the possibility of accidents expanding due to a single cabinet failure. The main busbar is installed on the sub-insulation frame above the back frame of the cabinet and is equipped with a busbar protective cover to prevent short circuits caused by falling metal objects. The neutral busbar is installed on the insulator below the cabinet, and the main grounding point of the grounding system is welded below the frame. The instrument door also has a grounding point connected to the shell. The PGL type AC low-voltage distribution cabinet is divided into: low-voltage metering cabinet, low-voltage incoming cabinet, capacitor compensation cabinet, municipal power conversion cabinet, busbar connection cabinet, and low-voltage outgoing cabinet.
        
GGD model: The cabinet body frame is partially welded and assembled using 8MF cold-formed steel, with installation holes on the frame arranged in E=20mm and E=100mm modules to enhance product assembly versatility. The ZMJ type busbar clamp is made from high flame-retardant PPO material through thermoplastic molding, featuring a block structure with high mechanical strength and insulation. The front of cabinets that are 1000mm and 1200mm wide adopts a symmetrical double-door structure, while cabinets that are 600mm and 800mm wide use a full-door structure. The back of the cabinet also adopts a symmetrical double-door structure. The cabinet body structure does not rely on wall installation. The connection between the cabinet door and frame uses galvanized hinges for easy installation and removal, with rubber inlays on the edges of the doors. Grounding knurled screws are used between internal mounting parts and the frame to form a complete grounding protection circuit. The top cover of the cabinet can be removed when needed for easy assembly and adjustment of the main busbar.
        
GCK model: Protection level: IP30, IP40; dimensions (width * depth * height) mm: 600 (800, 1000) * 800 (1000) * 2200; maximum current for incoming circuit: 3150A; maximum current for drawer circuit: 3150A.
        
GCL model: The cabinet body is assembled from thin-walled special-shaped materials, providing high strength, good performance, and light weight. The frame, door panels, and other components are coated with epoxy powder through electrostatic spraying. The coating is uniform with good insulation properties and durability. In MCC schemes, the interior of the cabinet is divided into five areas: horizontal busbar area, vertical busbar area, functional unit area, cable room, and neutral ground busbar area. Each area is isolated from one another to ensure normal operation of circuits and effectively prevent fault expansion. Functional units adopt drawer-type, plug-in type, and fixed type structures for safe maintenance and reduced unexpected power outage time.
        
MNS model: The frame of MNS low-voltage switchgear has a modular structure with its basic skeleton made from C-shaped steel assembly. All structural components of the cabinet frame are galvanized for durability and connected securely using self-tapping locking screws or grade 8.8 hex bolts to form a basic cabinet frame along with doors, partitions, mounting brackets, and busbar functional units that change according to corresponding programs. This forms a complete switchgear device. The internal dimensions of the switchgear, component sizes, and compartment sizes have been modified according to modularization (E=25mm). Each MNS modular low-voltage switchgear consists of three compartments: horizontal busbar compartment (at the back), drawer compartment (at the front), cable compartment (inside or on the right side at the front). Each compartment is separated by steel plates or high-strength flame-retardant plastic functional boards; upper and lower drawers are separated by metal plates with ventilation holes to effectively prevent accidents caused by flashovers or short circuits between switch components or busbars with other lines due to faults. The structural design of MNS low-voltage switchgear meets various incoming and outgoing line requirements: top in-top out, top in-bottom out, bottom in-top out, bottom in-bottom out. Structural components have wide applications with flexible assembly. Using E=25mm as a modulus allows arbitrary combinations of structures and withdrawable units to meet system design needs. Arc fault resistance ensures safe and reliable operation maintenance. Various sizes of drawer mechanical interlocking mechanisms meet standard requirements. It has three distinct functions: connection, testing, and separation. With an advantageous geographical location, it is safe and reliable. Standard modular design can consist of standard units for protection, operation, conversion, control, adjustment, measurement, indication etc., which can be assembled as required. High-strength flame-retardant engineering plastics effectively enhance protection and safety performance.

All articles, images, and other materials we repost are copyrighted by their respective owners. Since non-original articles and images cannot be contacted one by one with copyright holders, if original authors or editors believe that their works should not be available online for public viewing or should not be used without compensation, please notify us promptly so that we can take appropriate measures quickly to avoid unnecessary economic losses for both parties.

Key words:

Previous:

The main function of the photovoltaic grid connection cabinet.

Next:

Precautions for Operating Low Voltage Distribution Cabinets

Recommended Reading

Chengyuan Electric and Siemens join forces to create a better future!

On October 23, 2024, at 2:00 PM, Chengyuan Electric successfully held a project communication and technical sharing meeting with Siemens in the first-floor exhibition hall of the factory. The purpose of this meeting was to strengthen cooperation and communication between both parties, promote innovation, and jointly advance the development of the smart electrical field.

2024-10-29

How to choose suitable box-type substations and cable branch boxes

In the power system, box substations and cable branch boxes play a crucial role and are widely used in various settings, such as industrial parks, residential areas, and commercial buildings. However, faced with a variety of models and specifications available in the market, how can one choose the box substation and cable branch box that best meet their needs?

2023-12-25

The role of cable junction boxes in automated control systems.

The cable branching box is one of the indispensable components in an automation control system, playing an important role in the system by enabling the branching and connection of cables, ensuring the normal operation of the entire system. This article introduces the function of the cable branching box and its significance in automation control systems.

2023-12-15

%E7%AC%AC%E4%B8%80%EF%BC%8C%E6%9C%80%EF%BC%8C%E4%BC%98%E7%A7%80%EF%BC%8C%E5%A2%9E%E5%BC%BA%EF%BC%8C%E4%B8%80%E6%B5%81%EF%BC%8C%E5%8D%93%E8%B6%8A%EF%BC%8C%E9%A2%86%E5%85%88%EF%BC%8C%E5%85%88%E8%BF%9B%EF%BC%8C%E5%BC%95%E9%A2%86

Sorry，当前栏目暂无内容!

您可以查看其他栏目或返回 首页

Sorry，The current column has no content!

You can view other columns or return Home