Solid Insulated ring main units

Specifications 1.Without SF6 apply;

2.The degree of protection for unit is IP67;

3.Module switch units;

The newest RMUs instead of SF6 RMUs.

Electrical Equipment Ring Main Units   Brief Introduction   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 Environmental Friendly International Invention, Domestic Initiative Design Domestic emphasized new product Beijing Initiative product Beijing Torch plan     Dimension

CSG	A	B	C
1 Loop	440	340	440
2 Loop	840	740	840
3 Loop	1240	1140	1240
4 Loop	1640	1540	1640
5 Loop	2040	1940	2040

    Structure Features   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   Multiple interlock function, safe operation ensured   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.   Specification

	Modular C	Modular F	Modular B
	Fuse Switch	composite apparatus	Vacuum Circuit Breaker	Isolating/earth Switch
Rated Voltage kV	12	12	12	12
Power frequency withstand voltage, Phase to phase, phase to earth/phase to breaking point kV	42/42	42/42	42/42	42/48
Lighting Impulse Withstand voltage,Phase to phase, phase to earth/phase to breaking point kV	75/95	75/95	75/95	75/95
Rated Current  A	630	125	630
Closing loop breaking current A	630	125	630
Cable charging breaking current A	10
5% Overload Breaking current 5%	31.5
Earth fault cable charging breaking current A	31.5
Earth fault cable charging breaking current	17.3
Short-circuit breaking current  kA		P.S	20
Closing capacity	50	P.S	50	50
Short time withstand current 4 S	20	20	20
Rated transferring current		1500
Mechanical life times	10000	10000	10000	2000