In modern power distribution systems, High and Low Voltage Switchgear play a critical role in ensuring the safe, reliable, and efficient transmission and distribution of electrical energy. Whether you are designing a new industrial facility, upgrading a commercial building, or expanding a utility network in China or abroad, understanding the various types of switchgear cabinets available is essential for making informed procurement decisions.
As China continues to lead the global power equipment manufacturing industry, the demand for high-quality high-voltage switchgear, transformers, and complete substation solutions has never been greater. Chinese manufacturers have established themselves as reliable suppliers of power distribution equipment, offering products that meet international standards while maintaining competitive pricing.
At Xinhong Electrical (Jiangsu Xinhong Electrical Equipment Co., Ltd.), we specialize in manufacturing a comprehensive range of power distribution equipment, including high-voltage switchgear, transformers, and complete substation solutions. With over a decade of experience in the industry and our manufacturing base located in Jiangsu Province, China, we are committed to delivering quality products that meet international standards.
This article provides a detailed overview of the most common High and Low Voltage Switchgearcabinet types, their structural characteristics, application scenarios, and selection criteria — written specifically for customers seeking reliable power equipment from China.
High-voltage switchgear is typically used in systems with voltages above AC 1000V, commonly found in utility substations, industrial plants, and large commercial complexes. In China, medium-voltage switchgear (1 kV to 52 kV) and high-voltage switchgear are widely used across various industries. Based on structural design and installation methods, high-voltage switchgear can be classified into the following main types:
The KYN series is one of the most widely used high-voltage switchgear types in modern power systems. It features a metal-clad, armored structure with withdrawable circuit breakers. The key advantage of KYN switchgear is its high safety level — each functional compartment (breaker room, busbar room, cable room, and auxiliary room) is separated by grounded metal partitions.
Applications: Suitable for 3.6kV, 7.2kV, and 12kV power distribution systems.
Key Features:
Withdrawable breaker design for easy maintenance
"Five-prevention" interlocking mechanism for enhanced operational safety
Compact footprint with high reliability
The XGN series belongs to the fixed-type switchgear category. Unlike withdrawable types, the circuit breakers in XGN cabinets are fixed in position. This design offers a more cost-effective solution while maintaining reliable performance.
Applications: Commonly used in 10kV distribution networks and ring main units.
Key Features:
Simpler structure with lower initial investment
Fixed design with easy installation
Suitable for applications where frequent breaker replacement is not required
The GG-1A series is an older generation of fixed-type high-voltage switchgear. While this model is gradually being phased out in favor of more advanced designs, it is still found in many existing installations across China.
Applications: Used in 3-10kV single busbar systems for power reception and distribution.
Key Features:
Open-type construction with angle steel frame
Equipped with "five-prevention" anti-misoperation devices
Rated current up to 1000A, breaking capacity up to 31.5kA
Low-voltage switchgear operates at voltages below AC 1000V (typically up to 690V) and is used for power distribution, motor control, and lighting applications in industrial, commercial, and residential settings. The most common low-voltage switchgear types available from Chinese manufacturers include:
GGD is a fixed-type AC low-voltage distribution cabinet with a universal cabinet design. The frame is constructed using 8MF cold-formed steel with localized welding and assembly, featuring 20mm modular mounting holes for high versatility.
Key Features:
Cost-effective solution for small to medium-sized distribution rooms
Adequate heat dissipation design
Open internal structure for easy wiring
Suitable for AC 50Hz, rated working voltage of 380V, and rated current of 1000-3150A
Limitations: Requires power shutdown for maintenance; suitable for smaller distribution systems.
GCK is an early generation of drawer-type switchgear. The drawer design allows for quick replacement of faulty modules without interrupting the entire system.
Key Features:
Modular drawer construction for easy maintenance
Main busbars positioned at the top of the cabinet
Suitable for AC 50(60)Hz, rated working voltage ≤660V, rated current up to 4000A
GCS is a drawer-type switchgear independently developed in China. It features a rotary advance mechanism (CJG-1~3) for drawer operation.
Key Features:
Single-sided operation design
800mm cabinet depth
Drawer replacement without power shutdown
Beyond voltage levels and model designations, switchgear can also be classified by structural type:
| Structure Type | Description |
|---|---|
| Metal-Clad Armored Switchgear | All major components (breakers, CTs, busbars) are installed in separate, grounded metal compartments |
| Metal-Enclosed Compartmentalized Switchgear | Similar to armored type but with less stringent separation requirements |
| Metal-Enclosed Box-Type Switchgear | Simple enclosure without internal compartmentalization |
| Open-Type Switchgear | No enclosure; exposed components |
Switchgear and transformers work together as an integrated power distribution system. At Xinhong Electrical, we manufacture both High and Low Voltage Switchgear and a full range of transformers to provide complete power solutions for customers worldwide.
Oil immersed transformer technology uses mineral oil for cooling and paper for insulation. These transformers offer superior cooling efficiency, especially for higher capacity applications. Oil immersed transformers are widely used in China's power grid and industrial sectors.
Key Advantages:
Higher efficiency in heat dissipation and cooling
Better impulse withstand capability (lightning strikes)
Suitable for outdoor installations and high-capacity applications
Xinhong Electrical is a leading oil immersed transformer manufacturer in China, offering a wide range of oil-filled transformers for various industrial and utility applications.
Cast resin transformer technology uses epoxy resin to encapsulate and insulate the windings, providing high mechanical strength and moisture resistance. The coils are cast under vacuum using a controlled epoxy resin system that forms a rigid, solid structure around the conductors.
Key Advantages:
No oil leakage risk; environmentally friendly
Self-extinguishing properties and excellent resistance to pollution and moisture
Suitable for indoor installations where fire safety is paramount
Cast resin transformers are ideal for applications in hospitals, airports, commercial buildings, and data centers where fire risk and oil leakages are unacceptable. They can operate in extreme conditions, from -40°C to high humidity environments exceeding 95%.
When evaluating oil immersed transformer vs cast resin options, consider the following factors:
For customers who require a dry transformer solution, both cast resin and vacuum pressure impregnated (VPI) types are available. Xinhong Electrical offers both oil immersed transformerand cast resin transformer options to meet diverse application requirements.
Prefabricated substation technology represents the latest advancement in integrated power distribution solutions. Also known as compact substations or box-type substations, these units combine high-voltage switchgear, transformers, and low-voltage switchgear in a single, factory-assembled enclosure.
Xinhong Electrical is a professional prefabricated substation manufacturer, offering complete pre-installed substation solutions for utility, industrial, and renewable energy applications.
Key Advantages of Prefabricated Substations:
Factory-assembled and tested for quality assurance
Reduced on-site installation time and costs
Compact footprint — typically occupies only 1/10 to 1/5 of the area of conventional substations
Weatherproof and vandal-resistant enclosure
Suitable for remote and harsh environments
Can accommodate both oil immersed transformers and dry-type transformers (such as SCB10, SCB11 series)
Multiple power supply configurations available (ring network, terminal, dual power)
When selecting High and Low Voltage Switchgear and associated transformers for your project, consider the following factors:
Voltage Level: Determine whether you need high-voltage (above 1000V) or low-voltage (below 1000V) equipment.
Application Environment: Indoor vs. outdoor, ambient temperature, humidity, and pollution levels.
Maintenance Requirements: Drawer-type (GCK, GCS, MNS) allows live maintenance; fixed-type (GGD, XGN) requires shutdown.
Space Constraints: Compact designs like MNS and prefabricated substations save floor space.
Safety Requirements: Consider "five-prevention" mechanisms for high-voltage switchgear.
Transformer Type: Choose between oil immersed transformer and cast resin transformerbased on fire safety, maintenance, and environmental considerations.
Compliance Standards: Ensure equipment meets relevant IEC, ANSI, GB, or local standards.
Manufacturer Location: Sourcing from established China manufacturers like Xinhong Electrical ensures competitive pricing and reliable quality.
Xinhong Electrical (Jiangsu Xinhong Electrical Equipment Co., Ltd.) is a professional manufacturer with over 10 years of experience in the power equipment industry. Our manufacturing facility is located in the Hardware Industrial Park, Nianzhuang Town, Pizhou City, Jiangsu Province, China, with convenient access to major transportation networks.
Our product portfolio includes:
High and Low Voltage Switchgear — KYN, XGN, GGD, GCK, GCS, MNS series
Oil Immersed Transformers — High-efficiency distribution transformers
Cast Resin Transformers — Dry-type transformers for indoor applications
Prefabricated Substations — Complete pre-installed substation solutions
Ring Main Units and other power distribution equipment
As a leading Chinese manufacturer, we are committed to providing high-quality products, competitive pricing, and professional technical support to customers worldwide. Our products are widely used in power, industrial, and construction sectors across China and international markets.
Understanding the various types of High and Low Voltage Switchgear cabinets is essential for designing efficient, reliable, and safe power distribution systems. From fixed-type GGD and XGN cabinets to drawer-type GCK, GCS, and MNS solutions, each type offers unique advantages for specific applications.
Similarly, choosing between oil immersed transformer and cast resin transformer technologies requires careful consideration of operational requirements, environmental factors, and lifecycle costs. As a leading oil immersed transformer manufacturer and prefabricated substation manufacturer in China, Xinhong Electrical is your trusted partner for comprehensive power distribution solutions.
For more information about our products, including high-voltage switchgear, transformers, and prefabricated substations, please visit our website or contact our sales team today.
About Xinhong Electrical
Jiangsu Xinhong Electrical Equipment Co., Ltd. is a leading manufacturer of power distribution equipment in China. We specialize in the production of High and Low Voltage Switchgear, oil immersed transformers, cast resin transformers, dry transformers, and prefabricated substations. With a commitment to quality, innovation, and customer satisfaction, we serve clients across industrial, commercial, and utility sectors worldwide. Our manufacturing base in Jiangsu Province, China, enables us to deliver high-quality products at competitive prices to customers around the globe.
