Gas-insulated ring main unit MSR GREEN-12

dry air-insulatedfor electrical networkspower distribution

Product Overview
The MSR GREEN-12 is a gas-insulated ring main unit (RMU) using clean air (GWP <1) as the insulating medium. The unit features a laser-welded stainless-steel gas compartment with a leakage rate ≤0.05% and a micro-positive internal pressure of 0.07 MPa to enhance operational safety and reduce maintenance requirements. Designed to meet State Grid standards, the MSR GREEN-12 offers a 10,000-cycle breaker mechanical life, partial discharge ≤10 pC and an LSC2-PM operational continuity class, enabling reliable service across varied ambient conditions while minimizing lifecycle costs through a zero gas-recycling concept.

Features

• Retains operational characteristics comparable to SF6-based RMUs while eliminating SF6
• Clean-air insulating medium: non-toxic and non-flammable, suitable for a wide range of ambient temperatures
• Laser-welded stainless-steel gas compartment with advanced sealing technology (leakage ≤0.05%)
• Micro-positive pressure design (0.07 MPa) for enhanced dielectric stability
• Breaker mechanical life: 10,000 cycles, ensuring long-term switching reliability

Compliance & Performance Highlights

• Insulating medium: Clean air (GWP <1)
• Gas compartment: Laser-welded stainless steel, leakage ≤0.05%
• Internal pressure: Micro-positive pressure 0.07 MPa
• Breaker mechanical life: 10,000 cycles
• Partial discharge: ≤10 pC
• Operational continuity class: LSC2-PM
• Non-toxic and non-flammable design
• Corrosion-resistant construction for diverse ambient conditions
• Zero gas recycling to reduce lifecycle and maintenance costs

Technical specifications

• Model name: MSR GREEN-12
• Insulating medium: Clean air (global warming potential <1)
• Gas compartment material: Stainless steel, laser-welded
• Leakage rate: ≤0.05%
• Internal pressure: Micro-positive pressure 0.07 MPa
• Breaker mechanical life: 10,000 cycles
• Partial discharge: ≤10 pC
• Operation continuity: LSC2-PM
• Safety: Non-toxic, non-combustible
• Design goal: Corrosion resistance and suitability for diverse ambient temperatures