1.Rmu switchgear without SF6.
2.Circuit breakers and fuse-switch combinations can be freely assembled.
3.Long Mechanical Life.
Electrical Equipment Ring Main Units
Solid Dielectric Ring Main Unit adopted Epoxy Resin as the insulating material, is a new developed environmental friendly and high-tech product experiencing two years and seven months researching and development with the assistance of related national departments.
Solid insulated Ring Main Units adopts insulation technology shielded with Epoxy resin and silicon rubbers.
Compact, Light Weight, Reliable and Secured
International Invention, Domestic Initiative Design
Domestic emphasized new product
Beijing Initiative product
Beijing Torch plan
All energized parts are sealed into epoxy resin bushing and rubber shield bus bar, fully shield and insulated.
Three position load switch structure design
Visible switch working position
Maintenance-free, suitability for outdoor application
Optional Spring operating mechanism, permanent magnetic controller
Standard modular design of manual and automatic operating mechanism, flexible assemble enabling
Arc-protection by separate phase to phase insulation
Comprehensive Modular Design, high standardized modular design enables flexible assembling and maintenance
Equipped with power network automation terminal modular, suitable for enterprises power network updating and rebuilding
Operation Mechanism adopts three protection processes, suitable for sever ambient conditions of site
Benefits of Product Application
Suitability for application in areas with low temperatures
The design of solid ring main unit reduces the dependence on SF6 gas which eliminate the potential problem caused by insulation gas of being liquefied under low temperature
Suitability for application in areas with high temperatures
The increased pressure caused by higher temperature is no longer an issue for solid dielectric ring main unit
Suitability for application in low-lying areas and construction sites with labor forces
The density of SF6 is five times more than normal air under the same condition, leaked SF6 are easily deposited in low-lying areas which is very dangerous for people working there. People can be suffocated by leaked gas.
Suitability for application in closed environment:
Vacuum arc extinguishing chamber is under normal pressure where all bushing and sealed fillings are solid dielectric which prevent the potential of explosion caused by normal gas insulated product.
Suitability for frequent switching operation
SF6 load switch is designed for switch operations for up to 2000 times, while the switch operations for solid dielectric designed ring main units are more than 100000 times.
Suitability for environmental protection
The green house effect caused by SF6 has drawn much attention, solid dielectric designed ring main unit eliminate the use of SF6 gas, which further meet the national requirement for environmental protection.
Vacuum Circuit Breaker
Rated Voltage kV
Power frequency withstand voltage, Phase to phase, phase to earth/phase to breaking point kV
Lighting Impulse Withstand voltage,Phase to phase, phase to earth/phase to breaking point kV