GGD Low-Voltage Fixed-Type Complete Switchgear System

Product Overview

The GGD-type AC low-voltage switchgear is designed for use in power distribution systems with 50Hz AC, serving electricity users such as power plants, substations, industrial facilities, and mining enterprises. It accommodates rated operating currents up to 3150A and is specifically engineered for the efficient conversion, distribution, and control of electrical energy in applications involving power supply, lighting, and general distribution equipment. Developed in alignment with guidelines from the Ministry of Energy, as well as feedback from a wide range of power users and design engineers, the GGD switchgear embodies key principles: safety, cost-effectiveness, practicality, and reliability. This new-generation low-voltage cabinet boasts exceptional features, including high breaking capacity, excellent thermal and dynamic stability, flexible electrical configurations, convenient modular assembly, enhanced series versatility, outstanding usability, and an innovative structural design. Additionally, it offers superior protection ratings, making it an ideal replacement and upgrade option for conventional low-voltage switchgear systems. The GGD AC low-voltage switchgear fully complies with international standards such as IEC 439-1 and GB 7251.1.

Structural Features

The cabinet body of the 1 GGD-type AC low-voltage distribution cabinet adopts a universal cabinet design, with its frame constructed by partially welding together cold-formed 8MF steel profiles. All frame components and specialized matching parts are supplied by designated steel profile manufacturers, ensuring the cabinet’s precision and quality. The modular design of the universal cabinet’s components features 20 standardized mounting holes, resulting in a high degree of interchangeability. This design allows factories to implement pre-production processes, significantly reducing the manufacturing cycle while boosting overall efficiency.

The 2 GGD cabinet design thoroughly addresses the issue of heat dissipation during operation. The cabinet features varying numbers of ventilation slots at both the top and bottom ends. When electrical components inside the cabinet generate heat, it rises upward and is expelled through the upper slots. Meanwhile, cooler air continuously flows in from the lower slots, creating a natural ventilation path that circulates from bottom to top within the sealed cabinet—thus effectively achieving the goal of heat dissipation.

The 3 cabinet doors are connected to the frame using pivoting, adjustable hinges that allow for easy installation and removal. At the folded edges of each door, a U-shaped rubber-plastic strip is embedded—during closure, this strip compresses slightly against the frame, preventing direct impact between the door and the cabinet body while also enhancing the door's overall protection level.

4 The instrument door, equipped with electrical components, is connected to the frame using multi-strand flexible copper wire, forming a complete grounding protection circuit for the entire cabinet.

5. The cabinet’s topcoat features a polyester orange-baked finish, offering strong adhesion and a premium tactile quality. The entire cabinet boasts a matte tone, effectively eliminating glare and creating a more comfortable environment for on-duty personnel.

Technical specifications

External Dimensions and Mounting Size