Product Overview
The 22kV metal-enclosed switchgear is an indoor medium and high-voltage complete power distribution equipment, suitable for three-phase AC 50Hz, rated working voltage 22kV single busbar and single busbar sectionalized systems. It is widely used in power plants, substations, industrial and mining enterprises, new energy power stations, urban core power grids and other places, used for the reception, distribution, control, protection and monitoring of electric energy, adapting to working conditions such as transformer protection and line control. It is the core equipment of the 22kV power distribution system and also a key node equipment of the intelligent power distribution network.
The product adopts a full metal armored enclosed structure, with high-quality components selected for core parts. It can be insulated with air or SF₆ gas, featuring high breaking capacity, excellent insulation, flexible combination and convenient maintenance. It complies with standards such as GB/T 3906, GB/T 11022, IEC 62271-200 and DL/T 404, and has passed CCC, ISO and type test certifications, adapting to various complex scenarios and meeting the strict power distribution requirements of industry and infrastructure.
Operating Environment
1. Ambient temperature: -5℃～+40℃, 24h average ≤+35℃; transportation and storage: -25℃～+55℃, up to +70℃ for a short time.
2. Indoor installation, altitude ≤2000m (can be customized to 3000m for special cases, insulation design needs to be optimized for high altitude).
3. Relative humidity: ≤50% at +40℃; up to 90% at +25℃, condensation should be considered, and anti-condensation device is required if necessary.
4. Pollution level: Level 3, Level 4 anti-corrosion can be customized, and the cabinet can be treated with special anti-corrosion coating.
5. Installation inclination: ≤5° with the vertical plane.
6. Installation site: No fire, explosion, severe vibration and corrosive medium, away from strong electromagnetic interference, seismic intensity ≤8 degrees, passing salt spray, damp heat and vibration tests.
Technical Parameters
Item | Unit | Parameter |
Rated working voltage | kV | 22 |
Rated insulation voltage | kV | 36 |
Rated frequency | Hz | 50 (adaptable to 60Hz) |
Rated current | A | 630/1250/1600/2000/2500/3150 |
Rated short-circuit breaking current | kA | 31.5/40/50 |
Rated short-time withstand current (4s) | kA | 31.5/40/50 |
Rated peak withstand current | kA | 80/100/125 |
1min power-frequency withstand voltage | kV | Phase-to-phase/earth 70; breaking port 80 |
Lightning impulse withstand voltage | kV | Phase-to-phase/earth 125; breaking port 145 |
Protection class | — | Outer casing IP4X, compartment interior IP2X (IP54 and above can be customized) |
Overall dimensions (W×D×H) | mm | 800/1000/1250×1800/2000×2300/2500 |
Executive standard | — | GB/T 3906, GB/T 11022, IEC 62271-200, DL/T 404 |
Product Features
1. Armored Enclosed Structure with Excellent Insulation Performance: Full metal armored design, optimized 22kV insulation structure, can be insulated with air or SF₆. The middle-mounted circuit breaker trolley can be quickly maintained, each unit does not interfere with each other, isolating high-voltage electric field, preventing arc leakage, ensuring continuous power supply, and adapting to core scenarios.
2. Complete Five-Prevention Interlocking to Eliminate Misoperation: Following five-prevention specifications, adopting forced mechanical interlocking, with five anti-misoperation functions, ensuring personal and equipment safety, avoiding high-voltage operation risks. The mechanical operation life is ≥1000 times, and the operation is reliable.
3. Independent Compartment Design with Strong Fault Controllability: The cabinet is divided into independent compartments such as busbar room and circuit breaker room, equipped with special pressure relief channels, adopting Type 2B internal arc protection to suppress arc spread. Each compartment is reliably grounded and equipped with a pressure release device for easy maintenance.
4. Strong Interchangeability and Convenient Maintenance: Trolleys of the same specification are universally interchangeable, supporting door-closed operation and front maintenance, compatible with wall-mounted and back-to-back installation. The trolley is easy to push, some models are maintenance-free, and the vacuum circuit breaker has good interchangeability.
5. Excellent Dynamic and Thermal Stability, Adapting to 22kV Working Conditions: Optimized busbar layout and cabinet strength, selected high-quality components, strictly controlling temperature rise, strong short-circuit resistance, can adapt to 22kV high-current working conditions for a long time, adapting to frequent operations with high stability.
6. Anti-Corrosion, Durable and Long Service Life: The cabinet is made of high-quality plates, processed by CNC machining, phosphating and electrostatic spraying, with high strength, corrosion resistance and anti-aging properties. Anti-corrosion coating can be customized, with compact structure and small floor space.
Our Advantages
1. Quick quotation, providing professional primary/secondary design, scheme optimization and technical consulting services, meeting the needs of 22kV scenarios, optimizing insulation and structural design, and providing one-stop solutions.
2. Standardized production, short delivery cycle, supporting urgent orders, customizable specifications, protection levels and insulation schemes to adapt to special working conditions, and flexibly configuring auxiliary components.
3. Comprehensive after-sales service, providing on-site installation and commissioning, training and lifelong maintenance, 7×24-hour emergency response, and providing special operation and maintenance guidance for 22kV equipment.
4. Complete certifications, with authoritative certifications such as CCC and ISO, high-quality core components, long warranty period, controllable quality, meeting international project and strict acceptance standards.
5. Strict quality control, full-process control of raw materials, production and testing, focusing on key links such as insulation and dynamic and thermal stability, testing according to standards to ensure factory quality.
Ordering Guide
The following information shall be provided when placing an order:
1. Relevant drawings and control requirements of primary circuit and secondary circuit, clarifying the needs of 22kV scenarios, indicating whether to install protection and monitoring modules, and determining insulation schemes and auxiliary component configurations.
2. Cabinet and power distribution room layout drawings to facilitate the optimization of installation schemes combined with equipment size and insulation requirements, and reasonably plan the spacing.
3. Incoming and outgoing line methods, busbar connection requirements and installation details, indicating whether back-to-back installation is required, and clarifying the trolley operation space.
4. Core component models and key parameters to ensure adaptation to 22kV working conditions, and clarify component brand preferences and interchangeability requirements.
5. Specify special environment and functional requirements, negotiate customized insulation, protection and intelligent schemes, and clarify whether to equip anti-condensation devices.
