RMU for Substation
RMU & Substation Systems- Riyadh
Complete Secondary Distribution Solutions
We provide reliable RMU (Ring Main Unit) and substation system solutions designed to ensure safe, efficient, and uninterrupted power distribution. Our systems support medium-voltage network protection, fault isolation, and load management across industrial, commercial, and utility applications.
With integrated protection relays, automation-ready panels, and SCADA connectivity, our RMU and substation solutions enhance operational visibility, improve network stability, and enable faster fault response. Engineered for modern power infrastructure, our systems support scalable expansion, secure communication, and long-term performance reliability.
WHAT IS AN RMU?
Ring Main Unit (RMU) is a compact, enclosed switchgear used in secondary distribution networks (11kV, 13.8kV, 33kV) for:
- Loop-in/loop-out connections
- Transformer protection and switching
- Network sectionalization
- Fault isolation
- Load transfer
Key Advantages:
- Compact footprint
- Gas-insulated (SF6 or eco-friendly alternatives)
- Maintenance-free operation
- Long service life (30+ years)
- Indoor/outdoor installation
- Safe operation (no exposed live parts)
RMU SOLUTIONS WE DELIVER
Applications:
- Primary substations (132kV/33kV)
- Large industrial facilities
- Shopping malls and commercial complexes
- Data centers
- Hospitals and critical facilities
Configurations:
- 2-way (simple ring)
- 3-way (ring + transformer)
- 4-way (double ring)
- 5-way and 6-way (complex networks)
Supported Technologies:
- Schneider Electric RM6 – Proven reliability, modular design
- ABB SafeRing/SafePlus – Advanced protection, eco-friendly
- Siemens 8DJH – Compact, maintenance-free
- Lucy Electric Sabre – Innovative design, UK standard
- ZIV Smart RMUs – Cost-effective, reliable
Applications:
- Distribution transformers (residential areas)
- Commercial buildings and offices
- Small industrial facilities
- Public infrastructure (schools, mosques)
- Retail and hospitality
Features:
- Compact design for space-constrained locations
- Indoor/outdoor variants
- Cable or overhead line connections
- Built-in earthing switch
- Fault passage indicators
MULTI VENDOR RMU INTEGRATION
We Work With All Major Brands:
Schneider Electric RM6
- Most widely deployed globally
- Modular “mix and match” bays
- SF6 gas-insulated
- Proven reliability (millions installed)
- Easy spare parts availability
Best For: Standard applications, proven technology
ABB SafeRing/SafePlus
- AirPlus™ technology (SF6-free)
- Environmental sustainability (0 global warming potential)
- Compact design
- Smart connectivity options
- Future-proof for environmental regulations
Best For: Environmentally conscious projects, Vision 2030 sustainability goals
Siemens 8DJH
- German engineering quality
- Maintenance-free design (no routine maintenance for 30 years)
- Compact dimensions
- Easy installation
- Excellent safety features
Best For: Premium applications, minimal maintenance requirements
Lucy Electric Sabre
- UK design standard
- Innovative RingShield technology
- Extensibility and flexibility
- Good value for money
- Strong Middle East presence
Best For: Cost-sensitive projects, UK standard preference
ZIV Smart RMUs
- Cost-effective solution
- Reliable performance
- Smart monitoring capabilities
- Good technical support
- Competitive pricing
Best For: Budget-conscious deployments, smart monitoring needs
CENTRALIZED MONITORING SYSTEM
SAS Devices Centralized Monitoring Platform:
Integrated Dashboard:
- Real-time status of all monitoring devices
- Event notification and escalation
- Historical trend analysis
- Report generation and analytics
- KPI tracking and benchmarking
- Integration with SCADA and OMS
Key Features:
- Web-based interface (mobile responsive)
- Role-based access control
- Automated report distribution
- Data warehousing and analytics
- GIS integration for fault mapping
- Export to engineering analysis toolsfault mapping
BENEFITS SUMMARY
Reliability Improvements:
- 50-70% faster fault location
- 40% reduction in outage duration
- Early warning of equipment degradation
- Improved protection scheme performance
Cost Savings:
- Prevent catastrophic failures ($500K-$5M per event)
- Reduce patrol costs (60-80%)
- Optimize maintenance (condition-based vs. time-based)
- Extend asset life (5-10 years)
Operational Benefits:
- SEC SLA compliance (restoration time targets)
- Forensic capabilities for investigations
- Training tool for protection engineers
- Grid planning insights
RMU Configuration & Selection
Our Selection Process:
Site Assessment
- Voltage level (11kV, 13.8kV, 33kV)
- Load requirements
- Network topology (radial, ring)
- Available space
- Environmental conditions
- Future expansion needs
Configuration Design
- Number of feeders
- Transformer rating
- Protection requirements
- Metering needs
- Communication requirements
- Earthing arrangement
Technology Selection
- Brand preference
- Budget constraints
- Spare parts availability
- Maintenance philosophy
- Environmental considerations
Integration Planning
- SCADA connectivity
- Protection relay selection
- Monitoring requirements
- Automation level
Smart RMU Solutions
Intelligent Monitoring & Control:
Remote Monitoring:
- Circuit breaker status
- Load current measurement
- Fault passage indication
- Equipment health monitoring
- Automatic Report generation
Communication
- IEC 61850 integration
- Modbus TCP/RTU
- DNP3 protocol
- 4G/LTE connectivity
- Integration with distribution SCADA
Analytics
- Load trending
- Predictive maintenance
- Energy efficiency monitoring
- Power quality analysis
- Fault analytics
COMPLETE SUBSTATION SYSTEMS
Beyond RMUs - Full Substation Solutions:
Medium Voltage Switchgear:
- Air-insulated switchgear (AIS)
- Gas-insulated switchgear (GIS)
- Vacuum circuit breakers (VCB)
- SF6 circuit breakers
Transformers:
- Transformer protection relays
- Feeder protection relays
- Motor protection relays
- Bay controllers
- Substation automation systems
Protection & Control:
- Power transformers (5 MVA+)
- Dry-type transformers
- Oil-filled transformers
- Hermetically sealed transformers
- Distribution transformers (100 KVA - 5MVA)
Monitoring Systems:
- Dissolved Gas Analysis (DGA)
- Transformer oil temperature monitoring
- Bushing monitoring
- Partial discharge monitoring
- Online condition monitoring
Auxiliary Systems:
- DC power systems (batteries, chargers)
- AC distribution
- Lighting and HVAC
- Fire detection and suppression
- Physical security systems