Ring Main Unit · CSG I
SF6-Insulated Indoor Ring Main Unit
C-SEC's indoor SF6-insulated RMU is listed as part of its secondary distribution range. It is intended for suitable indoor MV switching and protection installations, with arrangement and electrical ratings determined by the approved product configuration.
CSG I front · catalogue photograph01
Engineering use
An indoor RMU must be selected in conjunction with the distribution SLD, location constraints, safety requirements and cable interface. Compact construction does not remove the need to verify access, venting arrangements, electrical clearances and environmental conditions.
02
Functional options
Describe available switching, transformer protection, circuit-breaker and metering functions only as supported by the approved product module matrix.
03
Safety and operation
Provide the actual interlocking philosophy, operating interfaces, earthing sequence reference, pressure monitoring details where applicable, and approved instruction manual.
04
Technical sheet
05
Documents & CTA
Planning an indoor MV distribution installation? Request a specification check and the current product drawings.
Features
General characteristics
- 01SF6-insulated compact switchgear
- 02Equipped with SF6 switch disconnector
- 03Equipped with vacuum circuit breaker
- 04Modular or compact versions
- 05Internal arc resistant
- 06SCADA-compatible motorised unit, on request
- 07Stainless steel tank
- 08Canopy / enclosure available for outdoor use
- 09Developed according to IEC 62271-200
As listed in the C-SEC MV Switchgear Catalogue (2022).
Typical functions · 2 LBS + 1 CB
Select a unit
Typical arrangement drawn from the catalogue's typical functions. Your project configuration comes from the network SLD.
Available modules (catalogue): LBS · CB · FCT · M
Specifications
Technical data
Catalogue model · CSG I
| Characteristic | Unit | 12 kV | 24 kV |
|---|---|---|---|
| Electrical data | |||
| Rated voltage | kV | 12 | 24 |
| Lightning impulse withstand (1.2/50 µs) | kVp | 75 | 125 |
| Power-frequency withstand (50 Hz, 1 min) | kVrms | 28 | 50 |
| Rated current | A | 630 | 630 |
| Rated short-time current | kArms | 21 for 3 s | 21 for 3 s |
| Short-circuit making current | kAp | 52.5 | 52.5 |
| Mechanical & service | |||
| Protection degree | — | Mechanism IP2X · Cable compartment IP3X · Tank IP67 · Canopy/enclosure IP54 | |
| Standard colour | — | RMU RAL 7035 · Canopy/enclosure RAL 7012 | |
| Ambient temperature | °C | Basic −5 … +40; option −10 … +55 | |
| Dimensions (2 LBS + 1 CB) | |||
| Height | mm | 1470 | |
| Width | mm | 1190 | |
| Depth | mm | 727 | |
Source: C-SEC Medium Voltage Switchgear Catalogue (2022, QMS/FRM/SDM/72-04 R2 Issue 05). Technical characteristics vary by model and project configuration — refer to the latest approved C-SEC datasheet.
Documents
Technical documents
Only approved files are published. Project-specific documents are shared on request.
- Download
PDF · 2.2 MB · Rev. R2 Issue 05
MV Switchgear Catalogue (2022)
- Request for your configuration →
On request
Product datasheet
- Request for your configuration →
On request
GA / footprint drawing
- Request for your configuration →
On request
Typical SLD
- Request for your configuration →
On request
Installation prerequisites
- Request for your configuration →
On request
Test / standards declaration
Questions about the Indoor SF6 RMU
To provide switching and protection functions at defined points in a distribution network.
This page describes the SF6-insulated line. Check the dedicated innovation section for development-stage alternatives; do not assume equivalence.
Enquiry
Project-specific quotation
Share the key electrical parameters and the required panel functions for a technical review.
Related equipment
CSG IK12 kV · 17.5 kV
Indoor/Outdoor SF6 RMU
An RMU category for projects where installation conditions call for indoor and outdoor use.
View technical details →
CSG O12 kV · 17.5 kV
Outdoor SF6 RMU
An outdoor SF6-insulated RMU family for secondary distribution points outside conventional switchrooms.
View technical details →
- 33 kV
33 kV
33 kV RMU
C-SEC's first 33 kV RMU, manufactured at Haridwar under licence from Ormazabal, Spain, has been commissioned in Maharashtra.
View technical details →
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