Industry News

SF6 gas insulated ring main unit (commonly known as gas cabinet) is a fully sealed and fully insulated medium-voltage switchgear that uses sulfur hexafluoride (SF6) gas as the insulating and arc-extinguishing medium. All live conductive components are enclosed inside a stainless steel sealed gas tank filled with low-pressure SF6 gas, providing complete isolation from external environmental conditions.

The 220kV Disconnect Switch is a high-voltage outdoor isolation device designed for 220kV AC power transmission substations. It is mainly used to isolate electrical circuits, provide a visible safety disconnect point, and ensure safe maintenance operations for high-voltage equipment.

The High Voltage Indoor Type Vacuum Circuit Breaker (VCB) uses vacuum as both the arc-extinguishing and insulating medium. Designed for 10kV–35kV power distribution systems, it provides reliable protection and control for electrical equipment in power plants, substations, industrial facilities, mining enterprises, and commercial power networks.

With the continuous upgrading of urban power grids, new energy power generation and industrial power supply systems, compact, intelligent and low-maintenance medium voltage switchgear has become an indispensable core equipment for power distribution engineering. The Ring Main Unit With Circuit Breaker, represented by XGN15 series SF6 air-insulated ring main unit, has gradually replaced traditional bulky switchgear due to its small footprint, stable performance and strong scalability. This blog takes the products manufactured by Zhejiang Usune Electric Co., Ltd. as the core, comprehensively introduces product features, complete technical parameters, internal structure, operating specifications, application scenarios and supporting services.

When electrons collide with SF₆ molecules, they combine to form heavy negative ions with a probability of nearly 100%. This characteristic is of immense practical value for the deionization of the residual arc column and the arc-extinguishing process.