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Ring Main Units (RMU)
Compact medium-voltage switchgear for secondary distribution networks, ring feeder systems and transformer protection applications.
TOONICE provides SF₆-free, gas-insulated, air-insulated and solid-insulated ring main units for utility, industrial and infrastructure power distribution projects.
Project-based configurations are available according to system voltage, feeder arrangement, protection requirements, drawings and project specifications.
SF₆-Free Ring Main Units
SF₆-free medium-voltage ring main unit using dry air insulation for compact switching, protection and distribution in secondary networks.
Typical Use
- Secondary Distribution
- Urban Distribution
- Low-GWP Projects
Key Information
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Insulation
Dry Air (SF₆-Free)
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Standard
IEC 62271-1 / -200
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Configuration
Project-based
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Voltage Level
Up to 24 kV
Gas-Insulated Ring Main Units
Compact gas-insulated ring main unit using SF₆ gas and sealed gas-tank construction for switching, protection and power distribution in secondary networks.
Typical Use
- Ring Networks
- Compact Substations
- Industrial Distribution
Key Information
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Insulation
SF₆ Gas
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Standard
IEC 62271-1 / -200
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Configuration
Project-based
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Voltage Level
Up to 40.5 kV
Air-Insulated Ring Main Units
Air-insulated ring main units for secondary distribution and industrial power systems, available in XGN15 and XGN66 series configurations.
Typical Use
- Secondary Distribution
- Industrial Power Systems
- Utility Networks
Key Information
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Insulation
Air
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Standard
IEC 62271-1 / -200
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Configuration
XGN15 / XGN66 Series
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Voltage Level
Up to 40.5 kV
Solid-Insulated Ring Main Units
Solid-insulated ring main unit using solid dielectric insulation and vacuum switching technology for compact secondary distribution systems.
Typical Use
- Secondary Distribution
- Transformer Protection
- Compact MV Systems
Key Information
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Insulation
Solid Dielectric
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Standard
IEC 62271-1 / -200
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Configuration
Project-based
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Voltage Level
Up to 24 kV
Documentation & Engineering Support
Documents available for project review and engineering coordination.
- Drawings
- Technical Data Sheets
- Routine Test Records
- Inspection Reports
- Certificates
Frequently Asked Questions
What RMU products does TOONICE provide?
TOONICE provides SF₆-free, gas-insulated, air-insulated and solid-insulated ring main units for secondary distribution, industrial and infrastructure power systems.
What voltage levels are available for TOONICE RMUs?
Gas-insulated and air-insulated RMUs are available up to 40.5 kV, while the current SF₆-free and solid-insulated RMU ranges are available up to 24 kV. Specific configurations depend on product type and project requirements.
What is the difference between SF₆-free, gas-insulated, air-insulated and solid-insulated RMUs?
The main differences are the insulation medium, structural design, available voltage range and application requirements. SF₆-free RMUs use dry air, gas-insulated RMUs use SF₆ gas, air-insulated RMUs use air insulation, and solid-insulated RMUs use solid dielectric insulation.
Can TOONICE provide project-based RMU configurations?
Yes. Configurations can be engineered according to system voltage, feeder arrangement, transformer protection, metering, voltage-transformer requirements and switching or protection functions, subject to product type and project specifications.
What technical documents are available for project review?
Available documents may include drawings, technical data sheets, routine test records, inspection reports and certificates according to project requirements.
Need technical information?
Access product catalogues and technical documents for product selection and project review.
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MV & LV Equipment Manufacturer · Wenzhou, China
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