| Brand | Schneider |
| Model NO. | MV Compact Switchboard (Ring Main Unit) |
| Rated voltage | 12kV |
| Rated normal current | 630A |
| Series | Ringmaster C |
Product Description
The Ringmaster C is a high-performance medium-voltage ring main unit (RMU) engineered for reliable power distribution in 12–24kV networks. Designed by Schneider Electric, it combines compact construction, robust safety features, and low maintenance requirements, making it ideal for urban/rural distribution grids, commercial buildings, industrial facilities, and critical infrastructure. Its versatile design supports ring, radial, and spur network configurations, delivering consistent performance in harsh outdoor and indoor environments.
Key Features
Enhanced Safety Protection: Equipped with built-in safety interlocks and no exposed live parts, complying with the latest IEC standards for internal arc classification to ensure operator and pedestrian safety.
Compact & Robust Design: Space-saving structure fits limited installation areas, with a durable enclosure resistant to dust, moisture, and extreme weather conditions for long-term reliability.
Minimal Maintenance Needs: Vacuum circuit breaker (VCB) with high mechanical endurance and maintenance-free components reduces operational downtime and long-term costs.
Easy & Fast Installation: Pre-assembled and factory-tested modules enable quick on-site deployment, minimizing construction cycle and labor requirements.
Remote Monitoring & Control: Supports smart connectivity solutions, allowing real-time monitoring of electrical parameters, remote operation, and predictive maintenance.
Flexible Expandability: Fully extensible on both sides, compatible with standalone vacuum circuit breakers, ring switches, and auxiliary modules to adapt to evolving network needs.
High Operational Reliability: Rated short-time withstand current for stable performance during fault conditions, with a proven track record in diverse power distribution scenarios.
Environmental Friendliness: Recyclable materials and low environmental impact design align with global sustainability goals, reducing carbon footprint.
Wide Environmental Adaptability: Operates stably in extreme temperatures (-30℃ to +55℃), high humidity, and high-altitude regions, suitable for both indoor and outdoor installations.
Technical Specifications
Parameter |
Details |
Rated Voltage |
12kV, 15kV, 24kV |
Rated Current |
Up to 630A |
Rated Short-Time Withstand Current |
21kA, 25kA, 31.5kA (3 seconds) |
Protection Rating |
IP54 (standard), optional IP65 for harsh environments |
Switching Technology |
Vacuum circuit breaker (VCB) with high mechanical endurance |
Operating Mechanism |
Spring-operated, manual or motorized options |
Internal Arc Classification |
IEC 62271-200, internal arc tested |
Ambient Temperature Range |
-30℃ to +55℃ |
Altitude Adaptability |
Up to 2000m (debatable for higher altitudes) |
Compliance |
IEC, ANSI, and local regional standards |
Application Scenarios
Urban & Rural Medium-Voltage Distribution Grids: Ideal for branching and distributing power in residential areas, suburban communities, and rural towns. Its compact design fits narrow installation spaces, while reliable performance ensures uninterrupted power supply for households and small businesses.
Commercial & Public Facilities: Suitable for shopping malls, hotels, office buildings, hospitals, and airports. Supports 24/7 stable power distribution, remote monitoring meets facility management needs, and safety features protect dense human traffic areas.
Industrial Parks & Manufacturing Plants: Powers production lines, auxiliary equipment, and warehouse facilities. Withstands industrial environment disturbances, flexible expandability adapts to production capacity expansion, and low maintenance reduces factory downtime.
Critical Infrastructure: Deployed in tunnels, underground railways, and renewable energy (solar/wind) grid-connection points. Resists harsh operating conditions, internal arc protection ensures infrastructure safety, and smart control supports integrated grid management.
Data Centers & Telecommunication Facilities: Provides stable medium-voltage power input for data centers and telecom hubs. High reliability prevents power outages affecting critical IT operations, and remote monitoring enables real-time fault detection.