High Voltage Ring Main Unit (RMU), Switching Station & Cable Branch Box

The high-voltage ring main unit cable branch box is primarily used in 10kV cable network renovation projects, providing an economic, reliable, and maintenance-friendly wiring solution with its fully insulated and fully sealed design, replacing the traditional overhead line branches. The device uses SF6 gas as an insulating medium, significantly reducing the fault rate in the line. Its flexible wiring method simplifies the power grid system and enhances the reliability of the power supply, making it widely applicable in commercial centers, industrial parks, and urban densely populated areas.

This cable branch box features excellent protection, compact size, and lightweight, making it suitable for various harsh environments and easy to install. SF6 gas has excellent dielectric strength, with an annual leakage rate of less than 0.25‰, ensuring stable long-term operation. Additionally, the device supports distribution network automation, further improving the intelligent management of the power system.

Dimensions

Typical wiring scheme

Model	Line number description	Primary wiring diagram	Dimensions (L×W×H)
DFWK-102K	One inlet and two branches with one switch		1180×1050×1600
DFWK-102K	One inlet and three branches with one switch		1250×1050×1600
DFWK-104K	One inlet and four branches with one switch		1250×1050×1600
DFWK-112K	One inlet and one outlet and two branches with one switch		1350×1050×1600
DFWK-113K	One inlet and one outlet and three branches with one switch		1420×1050×1600
DFWK-114K	One inlet and one outlet and four branches with one switch		1420×1050×1600
DFWK-102K2	One inlet and two branches with two switches		1350×1050×1600
DFWK-112K2	One inlet and one outlet and two branches with two switches		1500×1050×1600
DFWK-103K3	One inlet and three branches with three switches		1850×1050×1600
DFWK-113K3	One inlet and one outlet and three branches with three switches		2000×1050×1600

Utilizes our SF₆ fully insulated, fully sealed modules with a maintenance‑free design.

Fully insulated and fully sealed structure with a touch‑safe design; reliable and maintenance‑free, compact and lightweight, with a tight configuration; easy installation and operation; suitable for all harsh environments and moisture‑proof; SF₆ chamber protection rated IP65.

Small size for easy installation and operation.

Powder‑coating processes and procedures meet international standards and provide corrosion resistance.

Uses non‑toxic, odorless, high‑dielectric‑strength SF₆ gas as the insulating medium. Busbars, connectors, and load switches are all housed within the SF₆ chamber, achieving a truly outdoor, fully insulated, fully sealed design. SF₆ annual leakage rate is below 0.25 ‰. A pressure gauge on the enclosure allows real‑time monitoring, and pressure data can be transmitted via RTU to the control center.

Connections employ fully insulated, touch‑safe cable heads for safe and flexible wiring.

Ring‑network cabinets include comprehensive anti‑misoperation features.

Supports distribution network automation.

Service life: 20 years, maintenance‑free.

Environmental conditions for use

a. Ambient air temperature: upper limit +40 ℃, lower limit –30 ℃.

b. Altitude: installation site elevation ≤ 2,000 m.

c. Installation site must be free of severe vibration and jolting; installation tilt no greater than 5°.