Zero-GWP 12kV Eco Gas-Insulated RMU | TSTY

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Environmentally friendly gas insulated RMU 12KV
Environmentally friendly gas insulated RMU 12KV

Hermetic stainless steel tank with 10,000-cycle endurance for maintenance-free, climate-compliant urban switching.

Overview
Key Applications
Why Choose?
Engineering
Technical Specifications
Customization
Support
Overview
The TSTY 12kV Environmentally Friendly Gas-Insulated RMU is a next-generation secondary distribution platform engineered to replace SF₆-dependent assets without compromising performance or footprint. Unlike conventional gas-insulated switchgear, it utilizes a zero-global-warming-potential (GWP) insulating medium sealed within a 3mm 304 stainless steel welded tank, achieving complete isolation from moisture, dust, and corrosive atmospheres for true maintenance-free operation.
Fully automated assembly lines ensure consistent weld integrity and gas tightness, while the compact modular design enables installation in space-constrained urban substations, box-type transformers, and outdoor kiosks. With load switch mechanical life rated at 5,000 cycles and vacuum circuit breaker endurance at 10,000 cycles, it meets IEC 62271-200 requirements for frequent switching in renewable integration, smart grid automation, and industrial load-center applications where environmental compliance and long-term reliability are non-negotiable.
Key Applications
These units target 12kV networks where SF₆ phase-out mandates, extreme environmental sealing, and automated production consistency distinguish them from legacy gas-insulated or air-insulated RMU alternatives.
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Renewable Energy Distributed Generation Switching Stations
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Industrial Manufacturing Load Center Compact Substations
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Subway Station
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Transportation Infrastructure Traction Feeder Automation
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Data Center Edge Substation Zero-Emission Switchgear
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Rural Electrification Resilient Weatherproof Distribution Nodes
Why Choose TSTY 12kV Eco-Gas Insulated Ring Main Unit?
All units feature factory-sealed primary components, optional intelligent monitoring integration, and full compliance with international environmental and safety standards for decades of reliable service.
Zero-GWP Environmental Compliance

Non-SF₆ insulating medium eliminates greenhouse gas liability and future regulatory retrofit costs; fully aligned with EU F-Gas Regulation and global decarbonization standards for sustainable grid infrastructure.

Hermetic Welded Tank Integrity

3mm 304 stainless steel tank with robotic welding ensures lifetime gas tightness and IP67 internal protection; no gaskets or seals to degrade, guaranteeing maintenance-free operation in coastal, industrial, or high-humidity environments.

Space-Optimized Modular Footprint

Compact dimensions enable direct replacement of legacy SF₆ RMUs without civil modification; standardized interfaces support seamless integration into existing box-type substations and urban retrofit projects.

Automated Production Consistency

Fully automated assembly lines eliminate human variability in welding and gas filling; 100% factory leak testing and dielectric validation ensure every unit meets IEC 62271-200 type-test performance benchmarks.

High-Endurance Switching Reliability

Load switch rated for 5,000 mechanical cycles and vacuum circuit breaker for 10,000 cycles withstand frequent operations in renewable intermittency and smart grid reclosing scenarios; validated under full-load conditions per IEC 62271-103/100.

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Engineering & Global Compliance
Every TSTY Eco-Gas RMU integrates automated manufacturing with multi-standard validation:
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Gas Tightness & Dielectric Verification

100% helium leak testing on welded tanks confirms <0.1%/year leakage rate; power-frequency and lightning impulse withstand tested per IEC 62271-200 to validate insulation coordination with eco-gas medium.

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Mechanical Endurance Validation

Load switch and VCB cycle tests documented under rated load and fault conditions; operating torque and contact resistance measured at intervals to confirm 5,000/10,000-cycle lifespan claims.

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Environmental Sealing Assurance

IP67 ingress protection and salt spray testing on tank welds and cable terminations verify performance in C5-M/CX environments; thermal cycling validates material compatibility across -40°C to +70°C range.

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Smart Integration Interoperability

Optional sensor and communication module interface tested for Modbus/IEC 61850 compatibility; signal integrity verified under EMI conditions typical of automated substations.

Technical Specifications
Standard configurations for 12kV eco-gas insulated RMU, 12kV rated voltage, 50Hz, 630A main busbar, 20kA short-circuit breaking, IP67 tank protection, mechanical life 5,000 (load switch)/10,000 (VCB) cycles, compliant with IEC 62271-200, GB/T 3906, CE, SGS, Zero-GWP certified.
Environmentally friendly gas insulated RMU 12KV

Parameters

 

 

Rated voltage

kV

12

Rated frequency

Hz

50

Rated current

A

Unit C:Unit 630 F:125V unit:630/1250

Rated power frequency withstand voltage

kV 

42/48 (Isolation fracture)

Rated lightning impulse withstand voltage

kV

75/85 (Isolation fracture)

Mechanical life

frequency

Unit C:Unit 5000 F:5000V unit:10000

Rated short-circuit breaking current

kA

Unit F:Unit 31.5V:20/25

Rated making current

kA

Unit C:Unit 50 F:80V unit:50/63

Main circuit rated short-time withstand current (4s)

kA

20/25

Main circuit rated peak withstand current

kA

50/63kA

Internal arc level

 

AFLR,20kA,0.5s

Rated working pressure (gauge pressure at 20℃)

MPa

0.03

Minimum working pressure (gauge pressure at 20℃)

MPa

0.02

Enclosure protection grade

 

IP4X

Air box protection level

 

IP67

Switch protection level

 

IP54

Collision resistance level of switchgear

 

IK10

Annual gas leakage rate

 

≤0.01%

Customization & Optional Features
Every TSTY Eco-Gas RMU is built to order with options reflecting automated manufacturing capabilities:
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Functional Configuration

Load switch, circuit breaker, combination fuse, or metering modules pre-configured within sealed tank; all validated for eco-gas dielectric performance and mechanical interlock coordination.

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Busbar & Fault Rating Tailoring

Standard 630A/20kA; custom ratings available based on verified type-test data for unique network requirements and fault levels.

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Environmental Adaptation Packages

Enhanced anti-condensation heating for tropical/humid sites; UV-resistant external coatings for direct outdoor exposure; low-temperature mechanism lubricants for arctic operation.

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Smart Monitoring Integration

Embedded temperature, pressure, and position sensors; wireless or wired communication options; partial discharge detection for predictive asset management.

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Aesthetic & Functional Customization

RAL color matching for architectural integration; bilingual labels and QR-coded digital manuals; custom cable termination arrangements for retrofit compatibility.

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Maintenance & Service Optimization

Lifetime sealed-tank warranty; spare mechanism kits for field-replaceable components; extended service packages backed by 80+ country technical support network.

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Safety & Interlock Enhancements

Mechanical/electrical interlocks for earthing switch verification; arc-flash mitigation accessories; enhanced padlock provisions for LOTO compliance in multi-operator environments.

Support & Documentation
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IEC-compliant datasheets and one-line diagrams
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Full type-test reports (lightning impulse, etc.)
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Installation, operation & maintenance manuals
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Regional technical support: 24/7 engineering assistance + spare parts hubs in Asia, Africa, and the Middle East

Ready to Specify for Your Project?

Tell us your project requirements—voltage level, environment, grid code, or delivery timeline—and we’ll provide a compliant, optimized solution.

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