40.5kV SF6 Gas Semi-Insulated Ring Main Unit
40.5kV SF6 Gas Semi-Insulated Ring Main Unit
Overview
The 40.5kV SF6 gas semi-insulated RMU is a reliable medium-voltage power distribution unit designed for protection, monitoring, and control of electrical systems. With air-insulated inlet/outlet lines and an SF6 gas-sealed main circuit, it is ideal for load cabinet substations, photovoltaic, and wind power plants.
Key Features
- Safety: Complete mechanical and electrical interlocks.
- Durability: 30-year lifespan.
- Intelligent Monitoring: IT/OT tech for real-time data.
- Cost-Effective: Key components in gas tank with external copper row connection for reduced cost.
Technical Specifications
- Voltage: 40.5kV
- Rated Current: 630A
- Insulation Medium: SF6 & dry air
- Ambient Temperature: -40°C to +55°C
- Altitude: ≤3000m
- Humidity: ≤95%
- Frequency: 50/60 Hz
- Lightning Impulse Withstand Voltage: 185kV (Directly earthed), 215kV (Across disconnector)
- Power Frequency Withstand Voltage: 95kV (Directly earthed), 118kV (Across disconnector)
- Protection:
- Indoor: IP2X
- Tank with HV parts: IP67
- Impact Protection: IK07 (Indoor), IK10 (Outdoor)
- SF6 Leakage Rate: ≤0.01% annually
- Operating Pressure: 0.4 Bar (filled), 0.2 Bar (minimum)
Electrical Specifications
- Short-Time Withstand Current: 25kA/3s (Main Circuit, Earth Switch)
- Peak Withstand Current: 65kA
- Short Circuit Breaking Current: 25kA
- Mechanical Endurance:
- Circuit Breaker: M2
- Earth Switch: M1
- Electrical Endurance: E1 for both CB and Earth Switch
Compliance
Conforms to IEC 62271 series standards including IEC 62271-100, 62271-200, and others.
Declaration
This product is customizable based on specific project requirements.
