12kV-40.5kV SF6 Gas-Insulated Ring Main Unit

12kV-40.5kV SF6 Gas-Insulated Ring Main Unit

Overview

This SF6 gas-insulated RMU is a modern medium-voltage power distribution solution designed for protection, monitoring, and control. It features a compact design, safety, reliability, and customizable configurations. Ideal for distribution stations, substations, urban areas, renewable energy projects, and industrial facilities.

Key Features

• Modular Design: Customizable, highly interchangeable.
• Full Insulation: Hermetically sealed circuit with enclosed cable plugs.
• Safety & Reliability: Complete interlocks for operator safety.
• Efficient Installation: Compact and easy to maintain.
• Long Service Life: Durable, 30-year lifespan.
• Intelligent Monitoring: Real-time data with IT and OT technology.

Technical Specifications

• Voltage Levels: 12kV, 17.5kV, 24kV, 36kV, 40.5kV
• Rated Current: 630A
• Insulation Medium: SF6
• Temperature: -25°C to +55°C
• Altitude: ≤1000m
• Humidity: ≤95%
• Frequency: 50/60 Hz
• Withstand Voltage:
  • Lightning Impulse: 75kV to 185kV
  • Power Frequency: 28kV to 95kV
• Protection:
  • Indoor: IP4X
  • Outdoor: IP43
  • Tank: IP67
• Internal Arc Rating: AFLR 20/21/25 kA/1s
• Leakage Rate: ≤0.01% annually
• Operating Pressure: 0.4 Bar (at 20ºC)

Circuit Breaker & Load Break Switch Functions

• Rated Short-Time Withstand Current: 20 kA/s to 25 kA/s (Main Circuit, Earth Switch, Earth Circuit)
• Peak Withstand Current: 52 kA to 65 kA
• Short Circuit Breaking Current: 20 kA to 25 kA

Fused Switch Combinations

• Fuse Current: 125A
• Short-Circuit Breaking: 31.5 kA

Mechanical & Electrical Endurance

• Mechanical Endurance:
  • Load Break Switch: M1
  • Circuit Breaker: M2
  • Earth Switch: M1
• Electrical Endurance: E1-E3 Class depending on component.

Compliance

Conforms to IEC standards including 62271-100, 62271-102, and others. Special customizations available based on client requirements.

Declaration

This product can be customized to specific project needs.