RMU Ring Main Unit

The High-Voltage Cable Branch Box (Ring Main Unit) integrates 12/24kV switchgear, circuit breakers, load switches, current and voltage transformers, 12/24kV power PT, ring main unit FTU, RTU, communication control terminal (CCU), 12/24kV metering and automatic meter reading, UPS power supply, and indicator instruments into a movable, sealed, and moisture-proof stainless steel enclosure. This design achieves the integration of primary and secondary systems in urban power distribution networks, modularizes assembly, shortens the construction cycle, and significantly improves the reliability of urban power grid operation.

The fully insulated gas-filled ring main switchgear is a metal-enclosed switchgear that uses SF6 gas insulation as its primary insulating medium. Designed to meet the demands of modern power distribution systems, this product integrates modular components such as load switch units, load switch-fuse combination units, vacuum circuit breaker units, and busbar incoming units. The modular design allows for flexible configurations to suit various application scenarios. By filling the interior with high-purity SF6 gas, the equipment achieves exceptional insulation performance and arc-extinguishing capabilities, significantly enhancing operational safety and reliability.

The KGXGN-12 Solid Insulated Ring Main Unit Switchgear is a key representative of the next-generation intelligent power grid distribution equipment. It uses solid insulation materials as the primary insulating medium, fundamentally changing the traditional ring main unit’s reliance on gas insulation. This design offers high reliability, environmental friendliness, and cost-effectiveness. Core components, such as vacuum interrupters, isolating switches, and grounding switches, are all encapsulated using solid insulation materials like epoxy resin. This innovation not only reduces the device's size and weight but also eliminates the risks of gas leakage and the greenhouse effect, ensuring outstanding environmental performance.

The HB-12/T630-25 Environmental Gas Insulated Metal-Enclosed Switchgear (GIS) uses a new type of environmentally friendly insulating gas, such as an alternative to SF6 gas, significantly reducing the potential environmental impact. It adopts a compact structural design, making the equipment space-saving and highly adaptable, particularly suitable for various urban distribution systems and high-voltage distribution networks. The metal-enclosed design provides high mechanical strength, allowing the equipment to operate stably in harsh environments, while offering excellent electromagnetic shielding performance to prevent external electromagnetic interference. In terms of safety, this equipment effectively prevents harmful gas leakage due to its gas-sealed structure, thereby improving operational safety and environmental friendliness.

SF6 Gas-Insulated Switchgear (GIS) is an advanced electrical device that uses sulfur hexafluoride (SF6) gas as the insulating medium. Widely used in medium and high-voltage power systems, the GIS cabinet encapsulates all live components, such as circuit breakers, isolators, busbars, and transformers, within a sealed metal enclosure filled with SF6 gas.This design effectively protects the equipment from external environmental factors, such as humidity and contamination, while significantly reducing its size. GIS cabinets are characterized by their compactness, lightweight design, ease of installation, maintenance-free operation, and long service life. These features make them particularly suitable for critical applications in airports, subways, railways, and other locations where high reliability in power supply is required.