Swiss-Spec Medium Voltage RMUs & Compact Protection Nodes
Pre-engineered secondary distribution units tested for high altitude, extreme temperature gradients, and seamless SCADA interfacing across Swiss cantonal infrastructure.
Gas-Insulated Ring Main Unit for Switzerland DSOs
Hermetically sealed stainless steel tank design featuring vacuum circuit breakers and disconnector units, compliant with Swiss ESTI safety norms and IEC 62271-200.
Explore Swiss RMU
TY-Intermediate Protection Box for Swiss Dual-Phase Systems
Heavy-duty composite enclosure engineered for secondary protection isolation between MV transformers and local LV distribution loops across Swiss cantons.
View Protection Unit
TY-SXD1 Swiss Grid Single-Phase Metering Management Box
Precision compression-molded SMC construction engineered for Alpine outdoor durability, with dedicated provisions for smart meter remote readout (OMS / M-Bus).
View Meter Enclosure
Ring Main Unit Deployment in the Swiss Energy Transition
How modern medium-voltage RMU architectures fulfill the stringent demands of Switzerland's Energy Strategy 2050 and distributed grid modernization.
Switzerland's electrical distribution grid represents one of the most reliable and technologically advanced systems globally, operating over 250,000 kilometers of high, medium, and low-voltage lines. However, the ongoing execution of Energy Strategy 2050 (Energiestrategie 2050), coupled with the phase-out of domestic nuclear generation and the explosive growth of rooftop photovoltaics, alpine solar farms, heat pumps, and electric vehicle (EV) charging hubs, has placed unprecedented demands on local Distribution System Operators (DSOs) such as BKW, Romande Energie, CKW, and EKZ.
At the center of this structural transition lies the secondary distribution substation, where Ring Main Units (RMUs) serve as the pivotal nexus for circuit protection, continuous loop feeding, sectionalizing, and automated fault isolation. Unlike flatland installations, deploying RMUs in Switzerland presents distinctive topological and climactic complexities: installations range from underground urban transformer vaults in Zurich and Geneva to remote alpine substations operating above 1,800 meters elevation in Valais or Graubünden, where extreme thermal cycling, condensation, and atmospheric pressure variations mandate exceptional dielectric and mechanical integrity.
Strict Swiss Regulatory Alignment
Fully compliant with the Swiss Federal Inspectorate for Heavy Current Installations (ESTI) guidelines, Ordinance on Heavy Current Electrical Installations (SR 734.2), and CENELEC/EN 62271-200 frameworks to ensure safety for utility personnel and public infrastructure.
Alpine Dielectric Compensation
Standard medium-voltage switchgear experiences reduced air dielectric breakdown strength at high elevations. Our Swiss-tailored RMUs feature optimized busbar clearances, enhanced solid dielectric insulation barriers, and pressure-compensated gas tanks rated for up to 3,000 meters altitude.
Ultra-Compact Footprint for Prefab Cabins
Swiss urban centers and municipal easements enforce stringent space limitations. Our modular RMU designs occupy minimal floor space, permitting direct installation into standardized prefabricated compact concrete substations (Betonstationen) with front-access cable terminations.
Engineering Solutions for Demanding Swiss Grid Topologies
Addressing bi-directional load flows, smart grid telecontrol, and environmental decarbonization through modular secondary switchgear.
Global procurement teams operating within multinational engineering, procurement, and construction (EPC) conglomerates face intense pressure to balance capital expenditure (CAPEX) with long-term operational resilience (OPEX). In the Swiss market, where unplanned downtime induces severe regulatory fines and consumer disruption, procurement engineers require verifiable equipment reliability, complete type-testing documentation from accredited laboratories (such as KEMA, CESI, or IPH), and end-to-end supply chain transparency.
Modern Ring Main Units supplied to Switzerland are no longer passive mechanical disconnectors. Instead, they operate as intelligent remote nodes configured with integrated capacitive voltage detection systems (CVDS), precision current/voltage sensors (Rogowski coils and low-power voltage transformers), and intelligent electronic devices (IEDs) supporting protocols such as IEC 60870-5-104 and IEC 61850 for direct integration with cantonal SCADA supervisory systems.
| Technical Parameter | Standard Industry Baseline | Teyi Electric Swiss-Spec RMU Specification | Engineering Benefit |
|---|---|---|---|
| Rated Voltage / Frequency | 12 kV / 17.5 kV • 50 Hz | 12 kV / 24 kV (Optionally 36 kV) • 50/60 Hz | Standardized across both Swiss 16kV and 20kV cantonal networks. |
| Insulation Media | Conventional SF6 Gas | Hermetic SF6 Gas / Fluoronitrile Eco-Gas / Dry Air | Complies with Swiss environmental chemical risk reduction (ORRChim) targets. |
| Internal Arc Classification | IAC A-F 16kA 1s | IAC AFLR up to 20kA 1s (Four-Sided Protection) | Maximum operator safety in compact underground vaults. |
| Altitude Derating Limit | 1,000 meters above sea level | Up to 2,500m without external derating (Custom 3,000m+) | Designed for Alpine ski resort substations & hydroelectric tie-ins. |
| Enclosure Protection Class | IP3X Tank / IP41 Enclosure | IP67 Stainless Steel Tank / IP44/IP54 Outer Enclosure | Total protection against flood ingress, dust, and corrosive moisture. |
| Switching Technology | Air break / Oil immersion | Maintenance-Free Vacuum Interrupter (30,000+ operations) | Zero contact oxidation, reduced fire risk, zero field gas replenishment. |
Technology Roadmap: The SF6 Phase-Out and Digital Twin Substation
Pioneering eco-friendly dielectric mediums and predictive IoT sensorics for next-generation European power networks.
SF6-Free Gas & Clean Air Switchgear
Aligning with European F-Gas regulations and Swiss Federal Office for the Environment (FOEN) policy, our R&D engineering has developed vacuum interruption coupled with dry-air or synthetic air insulation, completely eliminating greenhouse potential (GWP < 1) without altering external bay dimensions.
Predictive Online Condition Monitoring
Equipped with non-invasive infrared thermal sensors on primary busbar joints, UHF partial discharge monitoring antennas, and digital gas density transmitters. Real-time diagnostic telemetry enables condition-based maintenance schedules, avoiding premature capital replacement.
Smart Grid Self-Healing FLISR Automation
Integrated with high-speed automated motorized actuators and directional fault passage indicators (FPI). In the event of a cable fault in complex underground loops, the system executes Fault Location, Isolation, and Service Restoration (FLISR) within seconds, minimizing customer interruptions.
Collaborate with an Established Switchgear & RMU Manufacturer
Whether you require tender-ready technical documentation, Swissgrid-compatible CAD/BIM models, or customized OEM/ODM production batches, our engineering department provides rapid turnaround under strict confidentiality.
Request Technical Consultation & QuotationSwiss Compliance Framework & Manufacturing Rigor
Bridging Yueqing's agile manufacturing powerhouse with the exactitude required by Swiss utility specifications.
Operating out of Yueqing Economic Development Zone—globally acknowledged as China's electrical capital—Zhejiang Teyi Electric integrates complete supply chain synergy with world-class quality verification. Our manufacturing facilities are certified to ISO 9001 (Quality Management), ISO 14001 (Environmental Management), and ISO 45001 (Occupational Health & Safety). Every Ring Main Unit, cable branch cabinet, and meter enclosure destinating for European and Swiss territories undergoes rigorous multi-point validation.
Primary gas tanks are precision laser-cut from high-grade 304 or 316L stainless steel, automatedly welded via multi-axis robotic TIG welding cells, and evaluated under vacuum helium mass spectrometry leak detection to ensure a helium leak rate of less than 0.1% per annum. Routine dielectric dry tests, partial discharge measurements (< 5 pC at 1.1 Un), contact resistance testing, and full mechanical operation cycling are executed on 100% of finished assemblies prior to crating.
Full Type Test Documentation
Complete type test reports covering short-time withstand current (up to 25kA/3s), peak withstand current, temperature rise limits, mechanical endurance (M2 class • 10,000 operations), and internal arc classification (IAC AFLR) available for all tender submittals.
Customized Factory Acceptance Tests (FAT)
We facilitate remote digital live-streamed FAT or on-site client inspections, verifying relay configurations, interlocking mechanisms, mimic diagrams, and wiring schematics against individual cantonal utility requirements.
Robust Marine & Rail Packaging
Switchgear and enclosures are sealed with vapor-corrosion-inhibitor (VCI) desiccants, shock-mounted on fumigated IPPC wooden pallets, and packaged within reinforced crates engineered for multi-modal logistics across Europe.
Frequently Asked Questions for Swiss Engineering Teams
Key clarifications addressing electrical specifications, standards conformity, delivery timelines, and customization capabilities.
Integrated Low-Voltage & Metering Infrastructure for Switzerland
High-durability SMC fiberglass and stainless steel distribution enclosures designed to complement medium-voltage RMU transformer substations.
TY-SXS2-DXJ Low Voltage Three-Phase Electric Energy Metering Box
Two-position metering enclosure crafted from fire-retardant SMC composite, featuring segregated utility access and transparent polycarbonate meter inspection windows.
View Meter Enclosure
Stainless Steel Three-Phase Pole/Wall Hanging Distribution Cabinet
Heavy-gauge stainless steel construction offering extreme resistance against de-icing salts, mountain frost, and UV exposure in external Swiss rural and transit locations.
View Hanging Cabinet
TY-SXD1-FSH1 Waterproof Meter Protection Box
Engineered for harsh outdoor perimeter deployments, providing anti-tamper latching, robust polyurethane door gaskets, and high impact rating (IK10) for continuous service.
View Waterproof Box
TY-SXS1 Three-Phase One-Position Electric Energy Meter Box
Compact individual meter enclosure designed for direct mounting alongside secondary RMU substations supplying commercial facilities and small municipal loads.
View SXS1 Unit
Stainless Steel JP Comprehensive Low-Voltage Feeder Cabinet
Integrates transformer low-voltage distribution, reactive power compensation (capacitors), and smart energy monitoring into one rugged stainless steel enclosure.
View JP Cabinet
TY-SXD2-B Single-Phase Multi-Position Metering Enclosure
High-capacity modular enclosure supporting multiple residential customer feeds, designed with dual-door compartmentalization and internal cable raceways.
View Multi-Meter Box
TY-DFW Floor-Standing Underground Cable Branch Box
Specialized floor-mounted feeder branching cabinet engineered to interface directly with Swiss urban underground distribution loops and industrial estates.
View Branch Box
TY Three-Phase Electric Energy Metering Box (Transformer Type)
Configured for current transformer (CT) metering on high-amperage commercial connections, incorporating test switch blocks and tamper-proof sealing mechanisms.
View CT Meter UnitReady to Accelerate Your Switchgear & RMU Procurement?
Contact our senior engineering team today to review single-line diagrams (SLDs), discuss custom bay configurations (C, F, V, D, M modules), or obtain detailed pricing for Swiss and European energy infrastructure projects.