| Brand | ROCKWILL |
| Model NO. | Outdoor Gas Insulated Ring Main Unit for Data center power distribution-12kV to 24kV |
| Rated voltage | 24kV |
| Rated normal current | 630A |
| Rated frequency | 50/60Hz |
| 1min Power frequency withstand voltage | 55kV |
| Series | OMR |
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
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.
Good insulation performance, compact structural design；
High protection level, fully sealed and fully insulated structure；
Fast operation performance, high degree of intelligence；
Good environmental protection performance, and convenient installation.
| 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 | |
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.
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.
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.
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