Free Standing Outdoor Ring Main Unit-11kv

After years of development, our industry has developed and expanded, and the production of Low Loss 3 Phase Distribution Transformer, Electrical Transformer, Gas Insulated Switchgear Panel has completed the transition from small-scale to large-scale production, making it more competitive in the international market. Our corporate culture is to carry employees' ideal, create customer value and win enterprise development. We inherit and carry forward the excellent moral quality of the Chinese nation, and establish the excellent tradition of holistic supremacy and self-improvement. We will continue to work hard, be determined to innovate, meet customer needs, and measure our success by customer success! We are willing to devote all of our resources and energy to think with our customers to find and provide them with multifaceted product solutions.

SF6 Ring Main Unit RMU is suitable for 11 / 17.5 / 24/36 kV secondary distribution network. It is a completely sealed system with a stainless steel storage tank containing all live parts and switching functions. Sealed steel tanks with constant atmospheric conditions ensure a high degree of reliability as well as personnel safety and almost maintenance-free systems.

It provides switch fuse combinations or circuit breakers with relays to protect the transformer.

SF6 is used as a gaseous dielectric in high-voltage sulfur hexafluoride circuit breakers, switchgear, and other electrical equipment in the electrical industry, typically replacing oil immersed circuit breakers (OCBs) that may contain harmful polychlorinated biphenyls (PCBs). SF6 pressurized gas is used as an insulator in gas insulated switchgear (GIS) because it has much higher dielectric strength than air or dry nitrogen.

Due to its unique dielectric properties, power companies heavily rely on SF6 in the power system to achieve voltage electrical insulation, current interruption, and arc extinguishing in transmission and distribution.

When sulfur hexafluoride (SF6) is sealed inside transmission and distribution (T&D) equipment, switchgear, circuit breakers, and isolating switches can achieve insulation by extinguishing hazardous arcs. This stable and non-toxic gas has excellent dielectric strength and is a key component of power plant safety and efficiency

The full name of GIS is gas insulated metal enclosed switchgear. It is a high-voltage distribution device composed of circuit breakers, busbars, isolating switches, voltage transformers, current transformers, lightning arresters, bushings, grounding knives, and other components. GIS uses sulfur hexafluoride (SF6) gas with excellent insulation and arc extinguishing performance as the insulation and arc extinguishing medium, and seals all high-voltage electrical components in a grounded metal cylinder.

As a traditional open type distribution equipment AIS, it is in a mature stage of development in China and has certain manufacturing and operating experience. It relies on air and insulators to insulate the live parts from the ground and from phase to phase. Its busbar is exposed and directly in contact with the air. The circuit breaker can be of the ceramic column or tank type, with the ceramic sleeve as the equipment casing and external insulation. Its characteristic is that the external insulation distance is large and the floor area is large.

Service environment:

a) Air temperature: highest temperature: +40℃; lowest temperature: -25℃

b) Humidity: monthly average humidity 95%; daily average humidity 90%.

c) Altitude: Maximum installation height: 2500m

d) Obviously there is no ambient air polluted by corrosive and combustible gases, steam, etc.

e) No frequent violent shaking

Technical data

1) Depending on the current rating of the fuse-link 2) Limited by high voltage fuse-links