Ring Main Unit
Ring Main Unit
——Juhonkia: R&D, manufacturing, and batch supply of high-quality RMU. Covering 12kV/24kV/40.5kV, gas/air/solid insulation.
As an experienced ring main unit manufacturer, Zhejiang Juhongkai provides a full range of RMU / ring main switchgear products — gas-insulated, solid-insulated and air-insulated — with OEM/ODM capability, global certifications and strict factory testing.
| Product | Product Type | Features | Application |
|---|---|---|---|
| GSR4-12 | Fully Gas-Insulated RMU | Environmentally friendly, compact design | Indoor power distribution, industrial parks |
| GSR8-12 | Atmospheric Air-Insulated RMU | Maintenance-free, weather-resistant | Outdoor distribution, new energy stations |
| GSR6-12 | SF6-Free Gas-Insulated RMU (C-GIS) | Eco-friendly (no SF6), high safety | Green power grids, urban areas |
| JQHWX-12/24 | Outdoor Ring Main Box | Anti-sand, high/low temperature resistance | Wind power farms, outdoor suburbs |
| JSR6-40.5 | SF6 Gas-Insulated RMU (40.5kV) | High voltage, high reliability | Medium-voltage power grids, large factories |
As a ring main unit manufacturer, we operate an ISO-certified production line with dedicated assembly, testing and environmental chambers. Our in-house capabilities include:
1. Industry-Leading R&D Capability The first domestic enterprise to complete R&D, network access testing, and batch supply of *standardized & customized RMU* (SF6 gas-insulated, solid-insulated, air-insulated, outdoor type). 2. CNAS-Accredited Laboratory In-house lab certified by CNAS (China National Accreditation Service for Conformity Assessment) – conducts full-range tests (insulation performance, mechanical life, environmental resistance) to ensure product quality. 3. Smart Quality Control System Equipped with a "smart quality control brain" to monitor the entire manufacturing process (from raw materials to finished products), ensuring consistent quality across batches. 4. Mature Mass Production Capacity Stable supply chain & automated production lines, supporting batch orders for 12kV/24kV/40.5kV RMU, meeting urgent project timelines.
Hangzhou Metro Project
Product Used: GSR6-12 SF6 Gas-Insulated RMU
Solution: Adapted to the compact underground space of metro stations, with low SF6 leakage rate (<0.1%/year) and 24/7 stable operation, ensuring uninterrupted power supply for metro trains.
Wind Power Farm Project
Product Used: JQHWX-12/24 Outdoor Ring Main Box
Solution: Withstand harsh outdoor conditions (temperature range: -30℃~+50℃, anti-sand/dust), matched with intelligent monitoring modules to realize remote fault diagnosis, reducing on-site maintenance costs.
Customization Scope
Voltage level: 12kV/24kV/40.5kV (support non-standard voltage)
Insulation medium: SF6/gas/air/solid (based on environmental requirements)
Cabinet size: Compact design for narrow spaces (e.g., metro, high-rise buildings)
Functional configuration: Add intelligent monitoring, remote control modules.
OEM/ODM Advantages
Quality alignment: Same QC standard as Juhonkia’s own brand
Brand support: Provide neutral packaging, technical documents (customizable with partner’s logo)
End‑to‑end manufacturing — design, prototyping, production and factory testing under one roof.
OEM/ODM flexibility — custom cabinet sizes, control logic and nameplate options.
Quality & compliance — full documentation and third‑party testing available.
After‑sales support — spare parts, commissioning and technical training.
"There is always a ring main unit suitable for you!" Juhonkia continues to introduce new products in the field of ring main units. The ring main unit series products achieve full coverage of voltage levels and different insulation media products. It is the first domestic enterprise to simultaneously complete the R&D, manufacturing, network access testing and batch supply of standardized and customized SF6 gas insulation, solid insulation, environmentally friendly gas insulation, atmospheric air insulated ring main switchgear primary and secondary integrated ring main switchgear.
Hangzhou Metro
Wind power
