High distribution cabinet (High Voltage Switchgear) is an integrated assembly of primary and secondary equipment for receiving, distributing, controlling, protecting, monitoring, and metering power in 3.6kV-40.5kV power systems. As the core hub of high-voltage power supply and distribution systems, it is typically installed in substations or user high-voltage distribution rooms, containing high-voltage circuit breakers, isolation switches, load switches, earthing switches, current/voltage transformers, surge arresters, protective relays, and measuring instruments. Modern product adheres to strict safety standards-metal-enclosed design, insulation medium (air, SF6 gas, solid insulation) isolation, and five-prevention interlocking-evolving toward miniaturization, intelligence, high reliability, and maintenance-free operation to ensure safe, stable, efficient grid and equipment performance.
High distribution cabinet is classified by insulation and arc-extinguishing medium: Air-Insulated Switchgear (AIS, traditional, cost-effective, larger volume), Gas-Insulated Switchgear (GIS, ultra-compact, environment-independent, high reliability with SF6 gas-sealed stainless steel enclosure), and Solid-Insulated Switchgear (SIS, further miniaturized, environmentally friendly with no SF6, epoxy resin-encapsulated main circuits). All variants feature mandatory five-prevention interlocking to prevent misoperation. The intelligent trend integrates online monitoring (partial discharge, temperature, mechanical characteristics) and digital protection/control devices.
Product is widely used in power plants and substations (generator outlets, transmission/distribution control), industrial enterprise step-down stations (receiving high-voltage power and distributing to workshops), large buildings and facilities (data centers, airports, hospitals), new energy stations (wind, solar farm collection and grid connection), rail transit (subway main and traction substations), and power system ring network supply (improving reliability as ring main units). Offering system control, safety protection, continuity, and adaptability, High distribution cabinet meets strict quality standards for reliable performance.
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