Products 12kV-40.5kV RMU 12kV-40.5kV SF6 GAS INSULATED
12kV-40.5kV SF6 GAS INSULATED
SF6 gas-insulated ring main unit is a new type of medium-voltage power distribution product, which can effectively realise the protection, monitoring and control of power-using equipment. It has the advantages of small footprint, safety and reliability, advanced design, flexible programme combination and strong applicability. It is mainly used in distribution stations, substations and box-type substations in load centres such as urban residential districts, high-rise buildings, factories and enterprises, boosting stations or converging stations of photovoltaic or energy storage projects, and boosting stations of decentralized wind power plants.
Product Features
Modularity: unit independence, high interchangeability, can be customised according to user requirements combination of programmes
Fully insulated: The main electrical circuit is hermetically sealed in an gas tank and externally connected by a fully enclosed cable plug
Safety and reliability: Complete mechanical and electrical interlocks to ensure operator safety
Efficient operation and maintenance: compact structure, small size, convenient for users to install
Operating life: adopting all new composite materials, with a service life of at least 30 years
Intelligent: adopting IT and OT technology, online real-time monitoring
Technical Parameter
RMU Technical Specifications
General requirement
Voltage level (kV)1217.5243640.5
Rated normal current (A)630
Insulation mediumSF6
Service   ambient temperature(℃)-25 to +55
Altitude (m)≤1000
Relative   humidity≤95%
Frequency   (Hz)50/60
Rated lightning impulse withstand voltageDirectly earthed(kV)7595125170185
Across disconnector(kV)85110145195215
Rated power frequency withstand voltageDirectly earthed(kV)28/4238507095
Across  disconnector(kV)32/48456080118
ProtectionIndoorIP4X
Outdoor(Non-extensible)IP43
Tank  with HV partsIP67
Mechanical   impact protectionIK07 (Indoor) IK10   (Outdoor)
Internal arc ratingAFLR(kA/1s)20/21/25
SF6 gasAnnual leakage rate(year)≤0.01%
Filled pressure (at 20ºC)Bar0.40.40.40.40.4
Minimum   operating pressure (Bar)0.20.20.20.20.2
Circuit   breaker switch and Load break switch function
Rated short time withstand current(kA/s)Main electrical circuitRated short-time withstand   current(kA/s)20/3;21/3;25/2
Earth   switchRated short-time withstand   current(kA/s)20/3;21/3;25/2
Earth circuitRated short-time withstand   current(kA/s)20/1;21/1;25/1
Rated peak withstand currentMain electrical   circuit (kA)52;54.6;65
Earth   switch (kA)52;54.6;65
Earth   circuit (kA)52;54.6;65
Making  and breakingRated short circuit   breaking current (kA)20;21;25
Rated   short circuit making(peak)current (kA)52;54.6;65
Fused switch combinations function
Rated normal current (A)125
Rated   short-circuit breaking current(kA)31.5
Mechanical/Electrical  endurance class
LBS and CB Mechanical endurance class Load break switchM1
Circuit breakerM2
Earth   switchM1
Fuse  Combination Mechanical endurance classFused switchM2M1
Earth   switchM1M1
Electrical   endurance class short circuit makingLoad break switchE2E2E1E3E1
Circuit  breakerE2E2E1E1E1
Earth switchE2E2E1E1E1
Executive  standardsIEC 62271-100、IEC   62271-102 、IEC 62271-103、IEC 62271-105、IEC 62271-1、IEC 62271-200、IEC   60255、IEC 60529、IEC 62271-206
Declaration: This product is a custom class, special requirements can be customised according to customer requirements.






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