The Intelligent Eco-friendly Gas-insulated Ring Main Unit is a new-generation product independently developed by Beijing HCRT. Based on green environmental design principles, it offers reasonable layout, reliable power supply, compact structure, easy installation, flexible operation, small footprint, and excellent cost-performance. In terms of overall dimensions, it is comparable to conventional SF₆ gas-insulated cabinets and is the preferred replacement for both SF₆ ring main units and solid-insulated ring main units.
Key Features
Insulation medium: dry air, completely SF₆-free, green and environmentally friendly
Fully insulated, fully sealed, micro-positive pressure design; capable of safe operation even at zero gauge pressure
Three-position isolating switch with safe operation and visible break
Compact modular design with flexible configuration options
Vacuum interrupter replaces grounding switch for short-circuit making, ensuring safety and reliability
Multiple configuration options: top or side cable outlet, emergency high-voltage power interface, secondary module, and aviation plug interface
Custom solutions available according to customer requirements
Applicable Standards
GB 1984 High-voltage alternating-current circuit-breakers
GB/T 1985 High-voltage alternating-current disconnectors and earthing switches
GB/T 3804 High-voltage alternating-current load switches for rated voltages 3.6kV to 40.5kV
GB/T 3906 Alternating-current metal-enclosed switchgear and controlgear for rated voltages 3.6kV to 40.5kV
GB/T 11022 Common specifications for high-voltage alternating-current switchgear and controlgear standards
