XGN68-12 Indoor AC Prefabricated Metal-Clad Switchgear
The XGN68-12 indoor AC prefabricated metal-clad switchgear is a new type of compact indoor power distribution equipment designed for 12kV three-phase AC 50Hz power systems. The switchgear employs ZN10-12 vacuum circuit breakers and FZN58-12 vacuum load switches, both utilizing vacuum arc-extinguishing chamber epoxy resin solid-sealed technology, delivering excellent insulation performance, a compact footprint, and convenient operation.
The prefabricated metal-clad design integrates all functional components within a fully enclosed earthed steel frame, with each functional unit — busbar, switching device, cable termination, and control wiring — occupying clearly defined compartments. This modular approach enables rapid assembly, reduces on-site wiring work, and simplifies future expansion compared to traditional switchgear installations.
Technical Specifications
| Item | Specification |
|---|---|
| Rated Voltage | 12kV |
| Rated Insulation Voltage | 12kV |
| Rated Frequency | 50Hz / 60Hz |
| Rated Current (Main Busbar) | 630A / 1250A |
| Rated Short-time Withstand Current (Icw) | 20kA / 25kA (4s) |
| Rated Peak Withstand Current (Ipk) | 50kA / 63kA |
| Degree of Protection | IP4X (enclosure) |
| Installation Type | Indoor, prefabricated metal-clad |
| Switching Device Options | ZN10-12 vacuum circuit breaker / FZN58-12 vacuum load switch |
| Arc Extinguishing Technology | Vacuum interrupter + epoxy resin solid-sealed pole |
| Mechanical Endurance | ≥ 10,000 operations |
| Standards | GB 3906, IEC 62271-200 |
Key Features
- Vacuum Solid-Sealed Technology: Both ZN10-12 vacuum circuit breakers and FZN58-12 vacuum load switches adopt epoxy resin solid-sealed pole technology, completely enclosing the vacuum interrupter in high-grade insulation material — eliminating creepage risks, improving partial discharge performance, and extending service life in humid or polluted environments
- Compact Prefabricated Design: Modular assembly with pre-wired functional units significantly reduces on-site installation time compared to conventionally assembled switchgear, lowering overall project costs and commissioning schedules
- Clean and Environmentally Friendly: Vacuum arc-extinguishing technology eliminates the use of SF6 gas, oil, or other potentially hazardous insulation media — zero greenhouse gas emissions, no oil leakage risk, and simplified end-of-life disposal
- Aesthetically Pleasing Appearance: Clean, modern enclosure design with a smooth powder-coated finish and integrated door handles, suitable for indoor installations where equipment appearance is a consideration, such as commercial buildings and public facilities
- Flexible Configuration: Supports a wide range of standard schemes including incoming, outgoing, metering, and PT configurations, with both vacuum circuit breaker and vacuum load switch options to match different application requirements
- Improved Insulation Performance: All live parts are fully insulated with epoxy resin or heat-shrink tubing, reducing the risk of phase-to-phase and phase-to-earth flashover and enabling reliable operation in high-altitude and high-humidity environments
Applications
- Urban and rural distribution substations
- Industrial and commercial building power distribution
- Secondary distribution networks
- Renewable energy — small-scale solar and wind integration
- Infrastructure — schools, hospitals, public buildings
- Compact substation integration where space is limited