XGW-SF6 Insulated RMU
Module name: XGW
Specifications
Ambient temperature
Maximum temperature: 45℃
Minimum temperature:-45℃
Humidity Level
Maximum average relative humidity
Daily average≤ 95%
Monthly average≤ 90%
Altitude:≤ 2000 M
Seismic capacity: VIII (seismic intensity)
SF6 relative pressure: 0.03 MPa (≤20℃)
SF6 yearly leakage percent: ≤0.3‰
Arc ignition test
Rated short-time withstand current: 20kA/4s
IP rating
SF6 tank: IP67
Fuse tube: IP67
Metal enclosure: IP4X
Busbar
Busbar in the SF6 tank: 400 mm2Cu,
Earthing busbar in the RMU: 150 mm2Cu
Thickness of stainless SF6 tank: ≥3.0 mm
Note: If you want to install our SF6 RMU at places higher than 2000 m (altitude), please contact us.
| Item | Unit | Date | |||||
| XGW | Module C | Module F | Module V | ||||
| SF6 Insulated RMU | Load Switch | Load switch and fuse-combination | Vacuum circuit breaker | Disconnector | Earthing Switch | ||
| Rated Voltage | kV | 12 | 12 | 12 | 12 | 12 | 12 |
| Arc Quenching Method | Vacuum | Vacuum | Vacuum | vacuum | |||
| Rated Current | A | 630/1250 | 630 | 125 | 630 | 630 | 630 |
| Rated Frenquency | Hz | 50/60 | 50/60 | 50/60 | 50/60 | 50/60 | 50/60 |
| Main Closed-loop Resistance | μΩ | ≤350 | ≤240 | ≤500 (Note 1) | ≤140 | ||
| Power Frequency Withstand Voltage (phase to phase, phase to earth/across open contacts) | kV | 42/48 | 42/48 | 42/48 | 42 | 42 | 42 |
| Lightning Impulse Withstand Voltage (Phase to Phase, Phase to Earth, across open contacts) | kV | 75/85 | 75/85 | 75/85 | 75 | 75 | 75 |
| Rated Short-circuit Making Current | kA | 20/25 | 20 | 31.5 (Note 2) | 20 | ||
| Rated Short-circuit Breaking Current Times | time | 30 | |||||
| Rated Short-circuit Making Current | kA | 50/63 | 50 | 80 | 50/63 | ||
| Rated Short-circuit Making Current Times | time | 5 | 2 | ||||
| Rated Short-time Withstand Current | kA | 20/25 | 20 | 20 | 20 | 20 | |
| Rated Short-circuit Withstand Duration | s | 4 | 4 | 4 | 4 | 2 | |
| Rated Peak Withstand Current | kA | 50/63 | 50 | 50 | 50 | 50 | |
| Out-phase Earthing Fault Breaking Current | kA | 17.3 | |||||
| Rated Cable Charging Breaking Current | A | 10 | 25 | ||||
| Rated Take-over Current | A | 3700 | |||||
| Arc Ignition Duration | s | ≥0.5 | |||||
| Partial Discharge | pC | ≤20 | ≤5 (Note 3) | ≤5 (Note 3) | ≤5 (Note 3) | ||
| IP Rating | Sealed living part: IP67; Switchboard enclosure: IP4X | IP67 | IP67 | IP67 | |||
| Mechanical Endurance | time | 10000 | 10000 | 10000 | 10000 | 2000 | 2000 |
Note 1: the fuse is replaced by contact spike
Note 2: limited by high voltage fuse.
Note 3: key part
The SVI-12 complies with IEC60056, IEC60129, IEC60265, IEC60298, IEC60420, IEC60694, GB/T11022-1999, GB3906-91, GB1985-89, GB16926-1997, GB38041-90, GB1984-89, GB3309-89, GB3804-2004, and so on.
SOJO has years of experience in the design and manufacturing of XGW-SF6 ring main unit. With the foreign advanced technologies and CAD software, we developed the SF6 insulated MV switchgear, namely XGW series RMU. As a modularized unit, our RMU can be incorporated into other combinations flexibly. It is suitable for power network node, terminal, as well as various kinds of secondary substation which requires compact, flexible and practical RMUs.
SJXGN is the main module structure of the XGW-SF6 ring main unit. All the live part and switchgears are sealed in a stainless steel shell which is full of SF6. Thus the switchgear won’t be affected by the environment, leading to great reliability, safety, and maintenance-free property. SJXGN can have 6 switch units at most in a gas tank. If there are more than 6 units, you can connect different switch cabinets with an insulated and screened extensible busbar. This modularized design can meet the needs of various kinds of standard or non-standard distribution solutions.
| Load switch module |
| Direct cable connection module |
| Load switch fuse-combination module |
| Circuit breaker module |
SJXGN series SF6 ring main unit comprises 4 kinds of standard modules. You can make up different kinds of RMU or transformer feeder switch with these modules.
Application
The XGW series XGW-SF6 ring main unit can meet different requirements of MV (≤12kV) power distribution cable network. It is a kind of compact MV switchgear. The completely sealed structure can be used for different kinds of connecting solutions of RMUs and radial distribution network.
The load switch coupled with circuit breaker can protect the transformers less than 2000 kVA. The circuit breaker is mainly for the circuit protection, and it can protect transformers less than 3000 kVA.
All the primary equipment like switchgear, busbar, circuit breaker is sealed in a stainless shell filled with SF6.
Standard combination
XGW-12 provides 18 kinds of standard combination as follows:
- Standard 1
circuit C - Standard 1
circuit F - Standard 2
circuit DF - Standard 3
circuit CCC - Standard 4
circuit CCCC - Standard 2
circuit FC - Standard 3
circuit FCC - Standard 3
circuits CCF - Standard 4
circuits CCCF - Standard 2
circuits CF - Standard 3
circuits CFC - Standard 4
circuits CCFF - Standard 5
circuits CCFFF - Standard 5
circuits CCCCC - Standard 5
circuits CCCFF - Standard 4
circuits CFFC - Standard 4
circuits CCVV - Standard 5
circuits CCCF
Every module of the XGW-12 has the configuration as follows:
C cabinet: see the Standard Configurations and Features of Load Switch Module
F cabinet: see the Standard Configurations and Features of Load Switch and Fuse-combination Module
V cabinet: see the Standard Configurations and Features of Vacuum Circuit Breaker Module
Standard module
The modules that can be used in XGW-12 are shown in the table below.
| Module | Width (mm) | Approx. Weight (kg) |
| C Module: Load Switch | 350 | 120 |
| D Module: Direct Cable Connecting | 350 | 100 |
| F Module: Fuse-combination Switch | 350 | 180 |
| V Module: Circuit Breaker | 350 | 200 |
| CL Module: Sectionalizing Switch (Load switch) | 350 | 140 |
| VL Module: Sectionalizing Switch (Circuit Breaker) | 350 | 220 |
| ME Module: High Voltage metering unit | 350 | 220 |
