OMR-12/24/630 Outdoor Gas Insulated RMU
OMR is a ring main unit for the secondary distribution network.OMR can be supplied in 10 different configurations suitable for mostswitchning applications in 12/24KV distribution networks. The unit can be mounted to the smallest distribution transformer or be sited in a free standing format.
It is extendable and combined with Rockwell own developed technology concept, which is flexible, modular compact switchgear, they represent a complete solution for 12/24KV 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:
IEC62271-200, IEC60420, GB/T11022, GB3804, GB3906
Service environment Air temperature:-40ºC~+45ºC, the average daily difference is not greater than 25ºC;
Altitude above sea level: maximum installation altitude ≤3000m(if there are special requirements to be noted);
Earthquake intensity:not greater than 8 level;
The degree of ambient air pollution level is not greater than: III level;
Humidity: monthly average humidity 95%,daily average humidity 90%,
Saturated vapor pressure is not greater than the daily average value 2.2×10-3Mpa,
Monthly average of not more than1.8×10-3Mpa;
Consult the manufacturer when the ambient conditions above are exceeded.
Main technical specifications
|No.||Item||unit||Load breaker switch||Circuit breaker|
|4||Power frequency withstand voltage||kV||45||55||45||55|
|5||Lightning impulse withstand voltage||kV||95||125/150||95||125/150|
|6||Rated fault breaking capacity||A||1700||1400|| |
|7||Rated closed - loop breaking capacity||A||630|
|8||Rated cable charging breaking capacity||A||50&10|
|9||Rated short - circuit breaking capacity||kA|| ||20||16|
|10||Rated peak closing capacity||kA||63||50||63||50|
|11||2S short circuit withstand current, load switch / ground switch||kA||25/20||20/20||25/20||20/20|
|12||Rated peak withstand current||kA||63||50||63||50|