RING MAIN UNITS (RMUS): PRECISION POWER DISTRIBUTION SOLUTIONS BY MASHEL ELECTRIC
RING MAIN UNITS
Ring Main Units (RMUs) are sophisticated, compact switchgear systems designed for medium-voltage power distribution networks, typically operating at 11 kV in India. These factory-assembled, metal-enclosed units are engineered to control, protect, and distribute electrical power within ring-type distribution systems, ensuring reliable and efficient electricity supply. RMUs incorporate load break switches, circuit breakers, or fusible switches to manage power flow and protect distribution transformers, making them indispensable in space-constrained environments such as urban substations, industrial facilities, and commercial complexes. Their robust design, advanced safety features, and minimal maintenance requirements make them a cornerstone of modern power distribution infrastructure in India.
MASHEL ELECTRIC: AUTHORIZED DISTRIBUTOR OF SIEMENS AND SCHNEIDER ELECTRIC RMUS
Mashel Electric is a premier distributor of high-quality RMUs from Siemens and Schneider Electric, two globally recognized leaders in electrical engineering. As an authorized partner, we focus on trading these industry-leading RMUs, providing clients with access to cutting-edge technology without engaging in manufacturing or system house operations. Our strategic partnerships with Siemens and Schneider Electric ensure that clients receive genuine, high-performance RMUs tailored to meet the diverse power distribution needs of India’s industrial, commercial, and utility sectors. Mashel Electric offers comprehensive support, including expert consultation, procurement, installation assistance, and after-sales services, ensuring seamless integration and long-term reliability.
SIEMENS RMU OFFERINGS
Siemens provides the 8DJH series of gas-insulated RMUs, specifically designed for secondary distribution networks up to 24 kV, making them ideal for 11 kV applications prevalent in India. The 8DJH series is renowned for its compact footprint, maintenance-free operation, and exceptional durability, with a service life of 35–50 years. These RMUs are suitable for both indoor and outdoor installations, offering reliable performance in diverse environmental conditions.
KEY FEATURES OF SIEMENS 8DJH RMUS
- Gas-Insulated Technology: Utilizes SF6 gas for insulation, ensuring a compact, sealed design with minimal maintenance requirements.
- Modular Configurations: Offers flexible setups, including ring feeders and transformer feeders, with extensible options for future network expansion.
- Enhanced Safety: Features internal arc classification and compliance with IEC 62271-200 and IS:3427 standards, ensuring operator and system safety.
- Long Service Life: Engineered for 35–50 years of reliable operation, with robust construction suited for harsh environments.
- Compact Design: Optimized for space-constrained urban substations and industrial facilities.
Technical Specifications of Siemens 8DJH RMUs
| Parameter | Specification |
| Rated Voltage | Up to 24 kV (suitable for 11 kV applications) |
| Rated Current | Up to 630 A |
| Short-Circuit Breaking Capacity | Up to 21 kA |
| Insulation Medium | SF6 gas |
| Degree of Protection | IP65 (gas-filled compartments), IP3X (enclosure) |
| Compliance | IEC 62271-200, IS:3427 |
| Enclosure | Metal-clad, suitable for indoor and outdoor use |
| Circuit Breaker Type | Vacuum Circuit Breaker (VCB) |
MODELS AVAILABLE IN INDIA
- 8DJH Single-Way (LK): Features one break switch and one cable feeder, ideal for simple distribution setups in compact substations. This model is widely used in India for small-scale urban power networks.
- 8DJH Three-Way (RRL): Includes two ring switches and one load break switch, suitable for complex ring main systems requiring multiple connections. This model is popular in industrial and urban applications across India.
These models are specifically offered through Siemens’ authorized distributors in India, ensuring compliance with local standards and availability for diverse power distribution projects.
SCHNEIDER ELECTRIC RMU OFFERINGS
Schneider Electric provides the RM6 series of gas-insulated RMUs, designed for medium-voltage distribution networks up to 24 KV, with a focus on 11 KV applications in India. The RM6 series is celebrated for its reliability, smart grid integration capabilities, and modular design, making it a preferred choice for modern power distribution systems. These RMUs are engineered for both indoor and outdoor installations, offering ease of installation and advanced monitoring features.
KEY FEATURES OF SCHNEIDER ELECTRIC RM6 RMUS
- Gas-Insulated Design: Employs SF6 gas for a sealed, compact system, reducing maintenance needs and enhancing reliability.
- Smart Grid Integration: Compatible with Easergy T300 remote terminal units (RTUs) for real-time monitoring and control, enabling advanced grid management.
- Modular and Scalable: Offers both extensible and non-extensible configurations to meet diverse project requirements.
- Advanced Safety: Features internal arc resistance and compliance with IEC 62271-200, ensuring operator and system safety.
- Real-Time Monitoring: Includes sensors for voltage, current, and temperature, providing actionable insights into system performance.
TECHNICAL SPECIFICATIONS OF SCHNEIDER ELECTRIC RM6 RMUS
| Parameter | Specification |
| Rated Voltage | Up to 24 kV (suitable for 11 kV applications) |
| Rated Current | Up to 630 A |
| Short-Circuit Breaking Capacity | Up to 21 kA |
| Insulation Medium | SF6 gas |
| Degree of Protection | IP67 (MV tank), IP3X (LV compartment) |
| Compliance | IEC 62271-200 |
| Enclosure | Metal-clad, suitable for indoor and outdoor use |
| Circuit Breaker Type | Vacuum Circuit Breaker (VCB) |
MODELS AVAILABLE IN INDIA
- RM6 NE-D: A non-extensible model with a transformer feeder and 200A circuit breaker, ideal for fixed installations in compact substations. This model is widely used in India’s urban power distribution networks.
- RM6 RE-D: An extensible model with similar features, designed for scalability and future network upgrades, suitable for growing industrial and commercial applications.
- Smart RMU: Equipped with advanced sensors and RTUs for real-time monitoring and control, tailored for smart grid applications in India’s modernizing power infrastructure.
These models are available through Schneider Electric’s authorized distributors in India, ensuring compliance with local standards and suitability for diverse applications.
APPLICATIONS
Mashel Electric’s Siemens and Schneider Electric RMUs are designed to support a wide range of applications in India’s power distribution landscape:
- Urban Substations: Ensuring reliable power distribution in densely populated areas with limited space, such as metropolitan cities like Delhi, Mumbai, and Bengaluru.
- Industrial Facilities: Supporting manufacturing plants, oil and gas refineries, and mining operations with robust and efficient power management.
- Commercial Complexes: Powering office buildings, shopping malls, data centers, and mixed-use developments with safe and reliable electricity distribution.
- Renewable Energy Projects: Facilitating grid integration for solar farms, wind power installations, and hybrid energy systems, supporting India’s renewable energy goals.
BENEFITS OF CHOOSING MASHEL ELECTRIC FOR RMUS
- Authorized Distributor: Access to genuine Siemens and Schneider Electric RMUs, ensuring quality, reliability, and compliance with international standards.
- Technical Expertise: Professional guidance from experienced engineers for product selection, installation, and commissioning.
- Efficient Procurement: Streamlined processes for timely delivery of RMUs to meet project deadlines.
- Comprehensive After-Sales Support: Ongoing maintenance and technical support to ensure long-term performance and reliability.
- Tailored Solutions: Customized recommendations to align with specific project requirements, ensuring optimal performance and cost-efficiency.
Mashel Electric is dedicated to delivering reliable, efficient, and sustainable power distribution solutions through our partnerships with Siemens and Schneider Electric. Trust us to provide high-quality RMUs that meet your power distribution needs with precision and excellence.