Enerswit+ SMARTEC Ring Main Unit
The Enerswit+ SMARTEC RMU is UTEC's gas-insulated, medium-voltage Smart Ring Main Unit designed for intelligent secondary distribution networks. Operating across 17.5 kV, 24 kV, and 36 kV, it integrates motorized load break switches, vacuum circuit breakers, an embedded RTU, and SCADA communication to deliver real-time monitoring, automated control, and seamless SE ADMS integration across urban, industrial, and renewable energy applications.
Key Product Features
Integrated RTU & SCADA Connectivity
An embedded RTU module with IEC 101 and IEC 104 protocol support provides direct communication integration with SEC ADMS and third-party SCADA platforms. The RTU supports 32 digital inputs, 10 digital outputs, and LAN/RS232/485 interfaces, with a 24VDC lead-crystal battery backup for uninterrupted operation during auxiliary power failure.
IoT Monitoring & Condition Intelligence
The SMARTEC platform supports advanced IoT-enabled condition monitoring including thermal imaging, partial discharge detection via ultrasonic technology, and humidity sensing. An all-in-one sensing device integrates up to four monitoring functions, enabling predictive maintenance and reducing unplanned outages.
Anti-Maloperation Interlock System
The three-position disconnector combines the disconnector and earthing switch into a single, interlock-controlled operating mechanism. Mechanical and electrical interlocks prevent maloperation sequences, ensuring the earthing switch can only be engaged when the load switch is open, and the cable room door can only be accessed in a fully safe switching state.
Smart Grid-Ready Architecture
Delivers the three pillars of modern distribution intelligence: control, monitoring, and protection. With motorized LBS and circuit breaker operation, integrated RTU, and full compliance with SE specification 32-SDMS-11, it enables automated network management from a single, compact switchgear platform.
Proven Performance
IEC & SE Standards Compliance
Fully certified to IEC 62271-200, IEC 62271-103, IEC 62271-102, IEC 60255, and SE specification 32-SDMS-11, confirming compliance with the highest international and national medium-voltage switchgear requirements.
30-Year Maintenance-Free Service Life
Engineered as a maintenance-free distribution asset, the unit operates for 30 years without major intervention. The sealed SF6 enclosure maintains an annual gas leakage rate below 0.01%, eliminating the need for gas refilling throughout the entire operational lifecycle.
Up to 21 kA Internal Arc Rating
The gas tank incorporates a pressure relief valve tested to withstand internal arc faults up to 21 kA for 1 second. Rapid fault gas release protects both personnel and adjacent equipment during abnormal switching events, validated for freestanding and cable box configurations.
IP67 Primary Compartment Protection
The high-voltage gas compartment achieves IP67 ingress protection, while the outer enclosure is rated IP54 with IK10 mechanical impact resistance, ensuring reliable performance across outdoor substations, coastal environments, and industrial sites.
High Mechanical & Electrical Endurance
The load break switch achieves electrical endurance class E3 with 5,000 mechanical operations. The vacuum circuit breaker delivers M2 mechanical endurance class with an operating sequence of O-0.3s-CO-180s, supporting frequent switching applications and demanding operational duty cycles.
Enerswit+ SMARTEC RMU: Intelligent, Connected, Future-Ready
For projects requiring real-time network intelligence and automated switching, the Enerswit+ SMARTEC RMU delivers the complete package. Combining proven SF6 gas-insulated construction with advanced RTU, SCADA connectivity, and IoT-enabled condition monitoring, it is the ideal solution for utilities and industrial operators building smarter, more resilient medium-voltage distribution networks. Backed by UTEC's manufacturing expertise and regional after-sales support across Saudi Arabia and the wider Middle East, it provides long-term operational confidence across the full 30-year service life.
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