A medium-voltage switchgear (MV switchgear) is a complete set of power distribution equipment used in medium-voltage power systems (10kV-35kV) to receive, distribute electrical energy, and provide control, protection, monitoring and measurement for power circuits. It is a core component of power transmission and distribution systems, playing a key role in ensuring the safe and stable operation of the power grid.
As an integrated power control device, medium-voltage switchgear undertakes three core functions in the power system:
1.Power distribution: Receive high-voltage electricity from the upper-level power grid, convert and distribute it to various loads (such as transformers, industrial equipment, and commercial power supply systems);
2.Safety protection: Cut off faulty current quickly when short circuit, overload, leakage or other faults occur, to protect power equipment and personal safety;
3.Control and monitoring: Realize on/off control of power circuits, and monitor key parameters such as current, voltage and temperature in real time to ensure the stable operation of the power system.
According to the structure and use scenarios, medium-voltage switchgear can be divided into fixed type and movable type, which are widely used in various fields such as industry, commerce and municipal administration, and are indispensable key equipment for modern power systems.
| Configuration Feature | Fixed Type (Air-Insulated) | Movable Type (Air-Insulated) | 铠装式(Air-Insulated) | 间隔式 (SF6-Insulated) |
| Structure Principle | Fixed installation of components, no movable parts | Movable handcart structure, interchangeable handcart | Metal partition compartments, separate installation of components | Non-metallic partition compartments, SF6 gas insulation |
| Rated Current Range | 630A-2000A | 1250A-4000A | 1600A-4000A | 1250A-2500A |
| Protection Level | IP4X | IP4X | IP54 | IP54 |
| Maintenance Cost | Very Low | Low | Medium | Medium |
| Initial Cost | Low | Medium | High | High |
| Applicable Environment | Dry indoor | Indoor/outdoor | Indoor/outdoor, harsh environment | Humid/outdoor, harsh environment |
Buying Suggestion:
1.Determine the voltage level and rated current based on the project’s power demand and power grid conditions (12kV for medium-small projects, 35kV for large-scale projects);
2.Select the structure type according to the maintenance frequency and safety requirements (fixed type for low maintenance frequency, movable type for high maintenance frequency,armored for high safety requirements);
3.Choose the insulation type according to the environmental conditions (air-insulated for general environments, SF6-insulated for humid/harsh environments);
4.Consider local standards and certification requirements (e.g., IEC for European markets, IEEE for North American markets);
5.Consult our engineers for free project-specific recommendations, including customized solutions for special scenarios such as high altitude and salt fog.
Our medium-voltage switchgear has a service life of 25-30 years under normal operating conditions. To extend the lifespan: 1) Regularly inspect the insulation performance (insulation resistance test, partial discharge test) and replace aging insulation materials if necessary; 2) Check the “five-prevention” interlock device regularly to ensure it works normally; 3) Clean the cabinet and components to remove dust and debris, ensuring smooth heat dissipation; 4) Inspect the
All our products pass international certifications including IEC 62271-200, GB 3906, ISO 9001, CE, UL and CB. We can also provide documents that meet regional standards such as ANSI, DIN and JIS for customs clearance.
Standard models take 30-60 days for delivery; custom models take 45-75 days, depending on the customization requirements and order quantity.
Yes, we offer one-stop service including on-site installation guidance, operation training and after-sales maintenance. Our after-sales team responds within 24 hours to solve your problems.
Sure. We can customize voltage level, rated current, structure type, protection level and other parameters to meet your specific project needs, with a 10-15 day design cycle.
