Solid Insulated Ring Main Unit 13.2kV to 21.9kV Direct Supply

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Model NO.	Solid Insulated Ring Main Unit 13.2kV to 21.9kV Direct Supply
Rated voltage	12kV
Rated frequency	50/60Hz
Series	RSS

Description

Pioneer in China's eco-friendly switchgear sector, we have specialized in R&D and manufacturing of SF₆-free switchgear for decades. With core technologies, we have established industry standards. Boasting a fully independent end-to-end production chain, we have built a product matrix of zero-emission and high-reliability eco-friendly switchgear, making us a trusted choice for power grid construction.

13.2kV 12kV 14.5kV 15kV 21.9kV solid insulated switchgear is suitable for middle voltage power distribution system and rated current is 630A/1250A. It is more reliable than the SF6 ring main unit, and is more suitable for a wider range of applications in both of GB standard and IEC standard.

Features

Safety

All live parts are sealed or embedded in the epoxy resin and silicon rubber, fully insulated and wholly enclosed structure, safety protection level: IP67.
Enhanced phase separation design, independent phase insulation to avoid the fault between phases.
Switch working position of each phase could be observed independently, which improves operation safety.

Multi-environmental application

Applicable to low temperature areas, high altitude areas, high humidity areas, high corrosion areas, low-lying areas and explosion forbidden places.

Flexibility

Standard modular design to facilitate circuit extension, modification and replacement.
Feasible to any replacement in both circumstances of any unit in fault and according user needs.
Smaller dimension makes it more convenient to be moved, transported or replaced.

Environment-friendly

Epoxy resin is employed instead of SF6.

Parameter

The voltage classes of some of these eco-friendly switchgears include 6kV, 6.3kV, 6.6kV, 6.9kV, 7.2kV, 10kV, 10.5kV, 11kV, 11.5kV, 12kV, 13.2kV, 13.8kV, 14.5kV, 14.4kV, 15kV, 15.5kV, 15.6kV, 17.5kV, 20kV, 21.9kV, 22kV, 24kV, 30kV, 33kV, 33.5kV, 34.5kV, 35kV, 36kV, 38kV, 38.5kV, 40.5kV, 44kV, 45kV, 46kV, 66kV and 69kV. and customization is available.

Description	Unit
Rated voltage	kV	13.2kV 12kV 14.5kV 15kV 21.9kV
Power frequency withstand voltage phase to phase/earth	kV	42
Power frequency withstand voltage Between open contacts	kV	48
Impulse withstand voltage phase to phase/earth	kV	75
Impulse withstand voltage Between open contacts	kV	85
Rated frequency	Hz	50
Rated current	A	630
Rated short-time withstand current (4s)	kA	20/25
Rated peak withstand current	kA	50/63
Rated active load breaking current	A	630
Rated closed loop breaking current	A	630
Mechanical lifetime	Ops	10000

Environmental Conditions

Altitude: ≤2200 m (Enhanced insulation type extendable to 3000 m)
Ambient Temperature: -20 ℃ to +45 ℃ (Short-term overload operation at ≤+55 ℃ for ≤3 hours within 24 hours is permissible)
Relative Humidity: Daily average ≤92%, monthly average ≤82% (Condensation-free and conductive-dust-free environment)

FAQ for Solid insulated switchgear

Q: Is this product truly environmentally friendly?

Yes. The RMU does not use SF6 gas, which has a Global Warming Potential (GWP) 23,500 times that of CO2. By eliminating SF6, it fully complies with the EU F-gas Regulation and global environmental directives, while producing no toxic byproducts during operation or end-of-life disposal.

Q: What does "solid insulated" mean, and how is it different from SF₆ gas-insulated or air-insulated switchgear?

Solid insulated RMU uses epoxy resin to completely encapsulate all high-voltage live parts, including vacuum interrupters and conductive circuits. Unlike SF₆ gas-insulated switchgear (GIS), it contains no greenhouse gases and eliminates risks of gas leakage or liquefaction. Compared to air-insulated switchgear (AIS), it is more compact, fully sealed, and immune to dust, humidity, and pollution, offering superior safety and reliability in harsh environments.

$6500.00

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Model

RSS-12

Warranty by

Whole life care manager

Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.