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	FYG

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 to 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 13.2kV to 21.9kV 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: Which special application scenarios are solid environmentally friendly cabinets suitable for?

It is especially suitable for scenarios with low sealing requirements, harsh environments or extremely high environmental protection requirements, including: 1) Humid coastal areas (no need to worry about gas leakage and moisture intrusion); 2) Industrial parks with much dust and oil pollution (the solid insulation layer is not easy to be polluted); 3) Alpine regions (no risk of gas liquefaction); 4) Urban core areas and ecological reserves (zero gas emissions, in line with environmental protection policies); 5) Narrow space installation (more compact structure, no need to reserve gas maintenance space).

Q: What is the general service life of a solid environmentally friendly cabinet? What are the key influencing factors?

The design service life is usually 20-25 years, which is equivalent to that of traditional SF6 cabinets. The key influencing factors include: 1) Quality of solid insulating materials (such as the anti-aging and anti-ultraviolet properties of epoxy resin); 2) Operating environment (high temperature, high humidity, and corrosive environments will accelerate insulation aging); 3) Maintenance quality (avoid mechanical collision damage to the insulation layer); 4) Short-circuit current impact (frequent short circuits will affect insulation performance).

Q: What are the core differences between solid environmentally friendly cabinets and gas-insulated environmentally friendly cabinets?

The core differences lie in the insulating medium and structural design: 1) Insulating medium: Solid cabinets use solid materials such as epoxy resin, while gas-insulated cabinets use gases such as dry air and nitrogen; 2) Sealing requirements: Solid cabinets do not require sealed cavities, while gas-insulated cabinets need strict sealing to prevent leakage; 3) Self-healing ability: Solid cabinets have no self-healing ability after insulation breakdown, while gas-insulated cabinets have certain self-healing ability; 4) Maintenance focus: Solid cabinets focus on checking the aging of insulation layers, while gas-insulated cabinets focus on monitoring air pressure and dew point.

Negotiable

Pricing calculator

Model

FYG-12

Warranty by

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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.