Quick Details
Description
Ring Main Units switches can be freely assembled in a completely sealed tank filled with SF6 gas, which could be both manual and motor operation. FTU is operational. Up to 4 to 7 switches can be assembled.
With the increasing power consumption and the continuous reconstructing of city and countrys power network, the further needs for related equipments for power distribution networks will be increasing gradually. The products designed by SOJO can meet all requirements of mid-voltage distribution networks for varied customers to different ring main modes, combination modes, protection modes, operating conditions, safety protection, transportation and installation requirements.
By the combination of accumulated production experiences, imported advanced international technologies and the assistant of computing simulation, the new developed SF6 filled mid-voltage switchgear-XGW ring main units with standard modular units and flexible combinations are, by one hand, met with requirements of network nodes and terminal users; and by the other hand; the second substations requirements for compact switchgears and flexible operation can also be fulfilled.
SJXGN is the main modular structure of ring main switchgears. All live parts and switching mechanism are sealed into SF6 filled enclosure. This kind of switchgears is not affected by external environmental conditions, the reliability and safety standard can be guaranteed, therefore, the product is maintenance-free. One sealed container can be equipped with at most 6 sets of switching units. When there are more than 6 sets of units, the product can be extended by sealed and insulated extensible busbars. Modular design can fulfill various standardized and non-standardized connection schemes in power distribution network.
SJXGN provides 4 standard modules; customers are able to select combined modules freely based on actual situation. The product can either be comprised as ring main unit or as transformer feeder switch.
Technical Parameters
|
Name
|
Unit
|
Parameters
|
|
|
Type-B Switch
|
Type-C Switch
|
Type-F Switch
|
|
|
Rated Voltage
|
KV
|
12
|
|
|
Rated Frequency
|
Hz
|
50
|
|
|
Rated Bushbar Current
|
A
|
630
|
|
|
Rated Current
|
A
|
630
|
630
|
*
|
|
|
Rated Short Circuit Breaking Current
|
KA
|
20
|
20
|
*
|
|
|
Rated transferring current
|
A
|
|
|
1500
|
|
|
Rated Short-time Withstand current
|
Load Breaker 4S
|
KA
|
20
|
|
|
Loadbreak Switch 3S
|
|
|
Earth Switch 2S
|
|
|
Rated Withstand Current
|
Main Closed Loop
|
kA
|
50
|
|
|
Earth Switch
|
|
|
Rated Short-Circuit Closing Current
|
kA
|
50
|
|
|
1 min Power Frequency Withstand Voltage
|
Phase to ground, Phase to Phase
|
kV
|
42
|
|
|
42
|
|
|
Vacuum breaking point
|
|
|
49
|
|
|
Isolated Breaking point
|
|
|
Lighting Impulse Withstand Voltage
|
Phase to ground, Phase to Phase
|
kV
|
75
|
|
|
Vacuum breaking point
|
75
|
|
|
Isolated Breaking point
|
85
|
|
|
Mechanical Life
|
Isolated Breaking point
|
Times
|
>1000
|
>2000
|
|
|
|
Earth Switch
|
Times
|
>2000
|
|
|
SF6 Rated Gas Pressure
|
MPa
|
0.03
|
|
|
SF6 Rated Water Content (V/V)
|
PPM
|
≤500
|
|
|
SF6 Annual Leak Rate
|
|
≤1%
|
|
Product Features
Stainless enclosure;
Completely insulated with filled SF6 gas;
Maintenance-free;
High capacity;
Long life;
Visible disconnection point;
Reliable interlock, safely operation.
Standards
SJXGN meets following standards:
IEC: 60694, 60298, 60265,60129,60240,60056
GB: 11022-99,3906-91,1985-89,16926-97,3804-90,3309-89
Working Environment:
Temperature: -25 ~40
Ralative humidity: daily average no more than 95%, monthly average no less than 90%
Altitude: no more than 2000M;
Earthquake Intensity: 8
We have focused on the research and development of completely sealed ring main units for 15 years. In order to develop advanced, high-tech, secure and easily used products, we have always looked for new and revolutionary ideas and designs. We can therefore maintain our dominant position at the forefront of the market and meanwhile best serve our customers.
The quality, reliability and prompt delivery of our products is guaranteed by the excellence of our employees and our own factories. Our core work team consists of several highly educated, experienced and advanced personnel. We have our own product manufacturing, testing, producing, sheet-metal machining and cable accessory processing bases. These facilities offer both customization services and direct production control that guarantees quality standards.
With all of our research, production and testing procedures meeting both national and international standards, we now supply products in seven categories. For these series, we have been awarded an international invention patent, two national invention patents and a patent for five utility technologies.
Our new model solid insulation sealed ring main unit has been developed under the support of related national departments. Utilizing advanced pole insulation techniques and epoxy resin and silicone seals, these products took two years and seven months to develop, and have been awarded seven patents.
In April, 2012, Solid Insulated RMU developed by SOJO Electric has successfully passed Full Type Test at KEMA in accordance with relevant International IEC Standards, once again providing the solid support to the excellent performance and reliability of the product.
If you are interested in any of our products, or have requirement for further information, please contact us at your convenience.
