Medium-Voltage Switchgear
SRM-12 12kV Gas-Insulated RMU
Model SRM-12
Fully insulated gas-insulated ring main switchgear for 12 kV distribution networks. Modular switching and protection units allow the circuit arrangement to be matched to ring-network and terminal supply requirements.
Share your rated data, quantity and project requirements.
View this model in our 2026 catalog ↗
Project configuration reviewTechnical documentation support
Product Overview
SRM-12 is a 12kV gas-insulated RMU for 6kV and 10kV medium-voltage distribution systems. It is commonly used for urban and rural distribution systems and compact substations, with the final selection based on rated data, drawings, and site conditions.
EPC companies, electrical contractors, utility project teams, panel builders, and industrial buyers can request configuration review for sealed modular RMU configuration. Please send single-line diagram, rated voltage, rated current, short-circuit level, protection scheme, busbar arrangement, and cabinet layout, quantity, destination, and any project standard requirements for quotation.
Technical Specifications
SRM-12 Technical Parameter Table
Review the SRM-12 module arrangement, rated data, and selected configuration before quotation.
| Item | Unit | C module | F module | V module | CB module | ||
|---|---|---|---|---|---|---|---|
| Load switch | GIS | Vacuum switch | Isolation / grounding switch | Circuit breaker vacuum break | Isolation / grounding switch | ||
| Rated voltage | kV | 12 | 12 | 12 | 12 | 12 | 12 |
| Rated frequency | Hz | 50 | 50 | 50 | 50 | 50 | 50 |
| Power-frequency withstand voltage, phase to phase / port | kV | 42 / 48 | 42 / 48 | 42 / 48 | 42 / 48 | 42 / 48 | 42 / 48 |
| Lightning impulse withstand voltage | kV | 75 / 85 | 75 / 85 | 75 / 85 | 75 / 85 | 75 / 85 | 75 / 85 |
| Rated current | A | 630 | Note 1 | 630 | 1250 / 630 | ||
| Rated closed-loop breaking current | A | 630 | |||||
| Rated current charging interruption current | A | 135 / 135 | |||||
| Rated short-circuit closing current, peak | A | 50 | 80 | ||||
| Rated peak withstand current | kA | 50 | |||||
| Rated short-time withstand current | kA / 3 s | 20 | |||||
| Rated short-circuit breaking current | kA | 31.5 | 20 | 25 | |||
| Rated transfer current | A | 1750 | |||||
| Maximum current of equipped fuse | A | – | 125 | ||||
| Loop resistance | micro-ohm | <= 300 | <= 600 | ||||
| Mechanical life span, number of times | time | 5000 | 3000 | 5000 | 2000 | 5000 | 5000 |
Note 1: It depends on the rated current of the fuse.
Installation Dimensions / Drawing
Applications
SRM-12 is mainly selected for urban and rural distribution systems and compact substations. The final application should match the confirmed sealed modular RMU configuration, rated data, and site installation conditions.
- Urban and rural distribution systems
- Compact substations
- Cable network and project distribution rooms
Ordering Instructions / Information Required for Quotation
ForSRM-12, send single-line diagram, rated voltage, rated current, short-circuit level, protection scheme, busbar arrangement, and cabinet layout, quantity, destination, and the expected delivery schedule. The engineering review will be based on the selected sealed modular RMU configuration and project drawing.
ORDERING INSTRUCTIONS
- State the required SRM-12 configuration, quantity, project destination, and intended application.
- Provide single-line diagram, rated voltage, rated current, short-circuit level, cabinet quantity, component configuration, and protection requirements for technical review.
- Confirm the final cabinet outline, foundation channel, cable trench, busbar interface, and cabinet arrangement drawing before final production or installation planning.
- List any special environmental, wiring, communication, metering, protection, or component requirements in the inquiry.
EXPLORE THE RANGE
Related equipment
