12kV SF6 Ring Main Unit SF6 Gas Insulated Ring Main Unit – Custom OEM RMU Switchgear Manufacturer
Ring main unit (RMU) is compact medium voltage switchgear widely used for urban power distribution.
As a professional OEM RMU switchgear factory, we produce full series of 12kV SF6 insulated ring main unit, including indoor and outdoor modular RMU cabinets for residential districts, underground substations and solar power stations. Our compact ring main unit adopts fully sealed gas tank structure, safe, maintenance-free and suitable for coastal high humidity environments with anti-corrosion customization support.
Advantages Of Our SF6 Gas Insulated Ring Main Unit
Fully Sealed SF6 Insulated RMU
Our ring main unit uses fully enclosed stainless steel gas tank, unaffected by dust, moisture and salt fog. The compact ring main unit eliminates arc leakage risk for dense residential power distribution.
Modular Compact Ring Main Unit
Modular integrated RMU switchgear design greatly reduces installation footprint, perfect for small underground compact substations and indoor power rooms.
Maintenance Free 12kV Ring Main Unit
Sealed gas chamber requires no regular gas inspection. Our OEM ring main unit factory provides 20 years service life for commercial and new energy projects.
OEM Custom Service For Ring Main Unit
As a one-stop OEM RMU switchgear factory, we provide all-around customization for global EPC contractors:
- Custom cabinet size & color for ring main unit
- SF6 gas tank anti-corrosion treatment for coastal ring main unit
- Indoor /outdoor installation structure of compact ring main unit
- Custom logo, nameplate and private label RMU switchgear
- Multi-language ring main unit installation manual & test report
- Special circuit scheme design of modular ring main unit
All models of this SF6 gas insulated ring main unit support OEM voltage and current parameter adjustment for global local grid standards.
12kV Ring Main Unit Standard Technical Specifications
| Model | Rated Voltage (kV) | Rated Current (A) | Short-circuit Breaking Current (kA) | Insulation Type | Installation Type |
|---|---|---|---|---|---|
| DFR-12/630 | 12 | 630 | 20 | SF6 Gas | Indoor |
| DFR-12/1250 | 12 | 1250 | 25 | SF6 Gas | Indoor |
| DFW-12/630 | 12 | 630 | 20 | SF6 Gas | Outdoor |
| DFW-12/1250 | 12 | 1250 | 25 | SF6 Gas | Outdoor |
| DFW-12/1250-31.5 | 12 | 1250 | 31.5 | SF6 Gas | Outdoor |
| DF-12 Modular | 12 | 630/1250 | 20/25 | SF6 Gas | Indoor/Outdoor |
Main parameters
| Test Item | Unit | XGN□-C Load Break Switch | XGN□-C Disconnector / Earthing Switch | XGN□-V Vacuum Circuit Breaker | XGN□-V Disconnector / Earthing Switch |
|---|---|---|---|---|---|
| Rated Voltage | kV | 12 | 12 | 12 | 12 |
| Rated Current | A | 630/1250 | 630/1250 | 630/1250 | 630/1250 |
| Rated Frequency | Hz | 50 | 50 | 50 | 50 |
| Power Frequency Withstand Voltage | kV | 42 for phase-to-phase & earth, 49 for isolating break | 42 for phase-to-phase & earth, 49 for isolating break | 42 for phase-to-phase & earth, 49 for isolating break | 42 for phase-to-phase & earth, 49 for isolating break |
| Lightning Impulse Withstand Voltage | kV | 95 for phase-to-phase & earth, 85 for LBS break, 110 for disconnector break | 95 for phase-to-phase & earth, 85 for LBS break, 110 for disconnector break | 95 for phase-to-phase & earth, 85 for VCB break, 110 for disconnector break | 95 for phase-to-phase & earth, 85 for VCB break, 110 for disconnector break |
| Mechanical Operating Life | Times | 10000 (Class M2) | 10000 (Class M2) | 3000 (Class M1) | 3000 (Class M1) |
| Gas Tank Protection Grade | – | IP65 | IP65 | IP65 | IP65 |
| Rated Short-Circuit Breaking Current | – | Active load breaking (Class E3), 630A / 100 times | Active load breaking (Class E3), 630A / 100 times | 20kA / 30 electrical endurance times (Class E2) | 20kA / 30 electrical endurance times (Class E2) |
| Internal Arc Resistance | kA/S | 25/1 (Class AFLR) | 25/1 (Class AFLR) | 25/1 (Class AFLR) | 25/1 (Class AFLR) |
| Item | Load Break Switch Cabinet HXGN□-12(F)/630 | Load Break Switch Cabinet HXGN□-12(FZ)/630 | Fuse-LBS Combination Cabinet HXGN□-12(FR)/100 | Fuse-LBS Combination Cabinet HXGN□-12(FZR)/125 |
|---|---|---|---|---|
| Rated Voltage (kV) | 12 | 12 | 12 | 12 |
| Rated Frequency (Hz) | 50 | 50 | 50 | 50 |
| Rated Current (A) | 630 | 630 | 100 | 125 |
| Rated Short-Time Withstand Current (kA) | 20 | 20 | — | — |
| Rated Short-Circuit Duration (s) | 2 | 2 | — | — |
| Rated Peak Withstand Current (kA) | 50 | 50 | — | — |
| Rated Short-Circuit Making Current (kA) | 50 | 50 | — | — |
| Rated Active Load Breaking Current (A) | 630 | 630 | 630 | 630 |
| Rated Ring-Circuit Breaking Current (A) | 630 | 630 | 630 | 630 |
| Rated Transfer Current (A) | — | — | 1150 | 2000 |
| Rated Short-Circuit Breaking Current (kA) | — | — | 31.5 | 31.5 |
| 1min Power Frequency Withstand Voltage (kV) – Phase-to-Phase & Earth | 42 | 42 | 42 | 42 |
| 1min Power Frequency Withstand Voltage (kV) – Isolating Break | 49 | 49 | 49 | 49 |
| Lightning Impulse Withstand Voltage (kV) – Phase-to-Phase & Earth | 75 | 75 | 75 | 75 |
| Lightning Impulse Withstand Voltage (kV) – Isolating Break | 85 | 85 | 85 | 85 |
| Main Switchgear Component | FKN12-12(D)/630 | FKN23-12(D)/630 | FKRN12-12(D)/100 | FZRN23-12(D)/125 |
Product Features
- Stable sealing performance: The gas chamber unit adopts one-time casting molding process.
- Safe operation performance: The contact position is clearly visible to effectively prevent misoperation.
- Reliable five-prevention interlock function for safe and reliable operation.
- Flexible expandable design, supports arbitrary combination to meet all customized requirements of customers.
- Easy to upgrade to motorized operation mode; remote control can be realized by installing FTU/DTU.
- Passed internal arc test to guarantee personal safety of operators.
- Long service life with maintenance-free operation for 30 years.
Product Technical Parameters
- Rated Voltage: 12kV / 24kV
- Rated Current: 630A
- Power Frequency Withstand Voltage: 42/49kV, 65/79kV
- Rated Short-Time Withstand Current: 20kA, 4S
- Rated Peak Withstand Current: 50kA
- Internal Arc Resistance: 20kA/0.5S
- Rated Working Pressure of SF6 Gas: 0.045MPa (gauge pressure at 20°C)
- Motor Operating Voltage: DC24V/48V, DC/AC110V/220V
Application Scenarios & On-site Installation Cases Of Ring Main Unit
Ring Main Unit For Urban Residential Districts
12kV compact ring main unit installed in community underground power rooms, stable power supply for thousands of households.
indoor ring main unit residential district on-site installation case RMU switchgear
RMU Switchgear For Solar & Wind Power Stations
Medium voltage ring main unit matches energy storage system, reliable ring network power distribution for new energy projects.
SF6 gas insulated ring main unit solar power station installation case
Compact Ring Main Unit For Underground Substation
Small-size modular ring main unit saves limited space of city underground compact substations.
compact ring main unit underground substation real installation project
Anti-corrosion Outdoor Ring Main Unit For Coastal Factory
Custom anti-salt fog RMU switchgear for coastal industrial parks, durable in high humidity marine environment.
outdoor ring main unit coastal industrial park OEM RMU switchgear
Our OEM Ring Main Unit Factory Production Line
Our OEM RMU switchgear factory covers a modern production workshop specialised in ring main unit manufacturing. We own full-automatic gas tank welding, assembly and high-voltage testing equipment. Every 12kV ring main unit completes independent cutting, welding, gas filling and partial discharge testing in our workshop, strictly controlling raw material and finished product quality. We support bulk orders and fast delivery of compact ring main unit for global engineering projects.
OEM ring main unit factory automatic production line for SF6 RMU switchgear
Finished 12kV compact ring main unit finished stock warehouse
Complete Factory Testing For All Ring Main Unit Before Shipment
- Partial discharge test for ring main unit
- Gas tightness test of SF6 insulated RMU switchgear
- Temperature rise test of compact ring main unit
- Voltage withstand & insulation resistance test
- Mechanical operation life test
- Overall factory routine inspection
Full ring main unit test reports and factory inspection videos can be provided for all OEM orders before delivery.
Need Custom Ring Main Unit For Your Power Project?
Our OEM RMU switchgear factory provides one-stop solution of compact SF6 ring main unit for substation, residence and new energy projects. Send your project parameters to get free quotation and technical drawing.
