Outdoor Gas Insulated Ring Main Unit for Data center power distribution-12kV to 24kV
Key attributes
| Brand | ROCKWILL |
| Model NO. | Outdoor Gas Insulated Ring Main Unit for Data center power distribution-12kV to 24kV |
| Rated voltage | 12/17.5kV |
| Rated normal current | 630A |
| Rated frequency | 50/60Hz |
| 1min Power frequency withstand voltage | 38/45kV |
| Series | OMR |
Description
OMR is a ring main unit for the secondary distribution network. RMU(OMR) can be supplied as a 3 or 4-way standard configurations with additional equipment according to customer specification. OMR can be supplied in 10 different configurations (Such as CVC, CCV, CVV, CFF, CCC, VVV, CCVV etc) suitable for most switching applications in 12/24 kV distribution networks.
It is extendable and combined with our own developed technology concept, which is flexible, modular compact switchgear, they represent a complete solution for 12/24 kV secondary distribution networks. OMR have identical user interfaces.
OMR is a completely sealed system with a stainless steel tank containing all live parts and switching functions. A sealed steel tank with constant atmospheric conditions ensures a high level of reliability as well as personnel safety and a virtually maintenance-free system.
The OMR concept offers a choice of either switch-fuse combination or circuit-breaker with relay for protection of the transformer. OMR can be supplied with an integrated remote control and monitoring unit. This product is in conformity with the standards: IEC 62271-200, IEC 62271-105
Notes：C = Circuit Breaker, V = Vacuum Load Break Switch, and F = Fuse-Switch Combination
Product Showcase Video
Main Switch Device
Load break switch:The load break switch is a 3-position switch disconnector and earthing switch, using SF6 gas as anarc quenching medium, the switch positioning is close-open-earthed. In the open position, theswitch satisfies the disconnector requirements.
Vacuum circuit beaker:OMR Vacuum circuit breaker has vacuum chambersas interrupters of the current. In series with the circuit-breaker main circuit is connected a 3-position disconnector/earthing switch. The operation between vacuum circuit breaker and disconnector/earthing switch is mechanically interlocked.Compact, simple structures and safe operation.
Technical feature :
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Good insulation performance, compact structural design；
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High protection level, fully sealed and fully insulated structure；
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Fast operation performance, high degree of intelligence；
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Good environmental protection performance, and convenient installation.
Main technical parameters:
| No | Item | Unit | Load Break Switch | Circuit Breaker | ||
|---|---|---|---|---|---|---|
| 1 | Rated voltage | kV | 12/17.5 | 24 | 12/17.5 | 24 |
| 2 | Rated current | A | 630 | |||
| 3 | Rated frequency | Hz | 50/60 | |||
| 4 | 1min Power frequency withstand voltage | kV | 38/45 | 55 | 38/45 | 55 |
| 5 | Lightning impulse withstand voltage | kV | 75/95 | 125/150 | 75/95 | 125/150 |
| 6 | Rated transfer current | A | 1700 | 1400 | — | — |
| 7 | Rated active load and close circuit breaking current | A | 630/1250 | |||
| 8 | Rated cable charge breaking current | A | 50&10 | |||
| 9 | Rated short circuit breaking current | kA | — | — | 20 | 16 |
| 10 | Rated short circuit making current (peak) | kA | 63 | 50 | 63 | 50 |
| 11 | Short time (2s) withstand current, load switch/earth | kA | 25/20 | 20/20 | 25/20 | 20/20 |
| 12 | Rated withstand current (peak) | kA | 63 | 50 | 63 | 50 |
| 13 | Mechanism life | Times | 3000 | 10000 | 3000 | |
Structure Diagram
Service environment
- Air temperature: Maximum temperature: +45℃; Minimum temperature: -20℃
- Humidity: Monthly average humidity 95%; Daily average humidity 90%.
- Altitude above sea level: Maximum installation altitude: 2500m
- Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
- No frequent violent shake
Solutions for RMU
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Optimization Design Scheme for the 12kV Air-Insulated Ring Main Unit Isolating Gap to Reduce Breakdown Discharge ProbabilityWith the rapid development of the power industry, the ecological concept of low-carbon, energy-saving, and environmental protection has been deeply integrated into the design and manufacturing of power supply and distribution electrical products. The Ring Main Unit (RMU) is a key electrical device in distribution networks. Safety, environmental protection, operational reliability, energy efficiency, and economy are inevitable trends in its development. Traditional RMUs are primarily represented -
Design Solution of 24kV Dry Air Insulated Ring Main UnitThe combination of Solid Insulation Assist + Dry Air Insulation represents the development direction for 24kV RMUs. By balancing insulation requirements with compactness and employing solid auxiliary insulation, insulation tests can be passed without significantly increasing phase-to-phase and phase-to-ground dimensions. Encapsulating the pole column solidifies the insulation for the vacuum interrupter and its connecting conductors.Maintaining the 24kV outgoing busbar phase spacing at 110mm, the -
Environment-Friendly Pure Air Insulated Ring Main Unit Overall Application SolutionProject Background and Technical ChallengesWith the advancement of global energy transition and the carbon peaking and carbon neutrality goals, medium-voltage distribution network equipment is accelerating the upgrade towards non-fluorinated, environment-friendly, compact and intelligent development. Traditional SF₆ insulated ring main units face stringent environmental constraints and high costs in procurement, operation and maintenance, scrapping and recycling due to their high Global Warming
Documentation Resource Library RMU
FAQ for RMU
Yes. The OMR is a completely sealed system with all live parts and switching functions enclosed in a stainless steel tank. The constant atmospheric conditions inside the sealed tank ensure high reliability, personnel safety, and a virtually maintenance-free operation.
Yes. The OMR can be supplied with an integrated remote control and monitoring unit, enabling real-time data collection, remote switching, and predictive maintenance for smart grid deployment.
The OMR RMU is available in 10 different configurations (including CVC, CCV, CVV, CFF, CCC, VVV, CCVV, etc.), with 3-way or 4-way standard options. Where: C = Circuit Breaker, V = Vacuum Load Break Switch, F = Fuse-Switch Combination. This covers most switching applications in 12/24 kV distribution networks.
