VOLTAK's Comprehensive Range of Ring Main Units (RMUs)

VOLTAK offers a diverse selection of Ring Main Units (RMUs), designed for both indoor and outdoor applications, capable of operating under extreme environmental conditions. Our RMUs, available in both oil and gas insulated models, are developed through advanced technological innovations and adhere to rigorous testing and safety standards.

12-17.5kV Ring Main Units (RMUs)

Our 12-17.5kV type Ring Main Units (RMUs) are SF6 GAS INSULATED and designed for compactness and modularity, making them ideal for medium voltage electricity distribution networks.

Key Features:
Suitable for Self-Powered Relay for VCB Switchgear.
Consecutive interlocking systems for operational safety.
Restricted access to cable and fuse compartments, contingent upon earthing switch position.

Technical Specifications:
Rated Voltage: 17.5 kV
Rated Frequency: 60 Hz
Rated Normal Current: 400 / 630 A
Rated Power Frequency Withstand Voltage: 38 / 45* kV
Rated Lightning Impulse Withstand Voltage: 95 / 110* kV
Internal Arc Classification: A (FL) 21 kA / 1s (Indoor), A (FLR) 21 kA / 1s (Outdoor)
Rated Short-Circuit Withstand Current: 21 kA / 1s
SF6 Pressure: 1.30 Bar (Operational), 1.10 Bar (Minimum for Insulation)
Loss of Service Continuity: LSC2
Ambient Temperature: Up to 40 °C

24kV Ring Main Units (RMUs)

Our 24kV type Ring Main Units (RMUs) are also SF6 GAS INSULATED, tailored for medium voltage electricity distribution networks, with compact or modular designs.

Technical Specifications:
Rated Voltage: 24 kV
Rated Frequency: 60 Hz
Rated Normal Current: 400 / 630 A
Rated Power Frequency Withstand Voltage: 50 / 60* kV
Rated Lightning Impulse Withstand Voltage: 125 / 145* kV
Internal Arc Classification: A (FL) 21 kA / 1s (Indoor), A (FLR) 21 kA / 1s (Outdoor)
Rated Short-Circuit Withstand Current: 21 kA / 1s
SF6 Pressure: 1.30 Bar (Operational), 1.10 Bar (Minimum for Insulation)
Loss of Service Continuity: LSC2
Ambient Temperature: Up to 40 °C

36/40.5kV Ring Main Units (RMUs)

Our 36/40.5kV type Ring Main Units (RMUs) are designed for higher voltage requirements, ensuring reliability and efficiency.

Technical Characteristics:
Rated Voltage: 36 kV
Rated Normal Current: 630 A
Rated Frequency: 50 / 60 Hz
Rated Power Frequency Withstand Voltage: 70 / 80* kV
Rated Lightning Impulse Withstand Voltage: 170 / 195* kV
Internal Arc Classification: A (FL) 16 kA / 1s (Compact), A (FLR) 16 kA / 1s (Modular)
Rated Short-Circuit Withstand Current: 16; 21 kA / 1; 3 s
SF6 Pressure: 1.10 Bar (Operational), 1.05 Bar (Minimum for Insulation)
Loss of Service Continuity: LSC2
Ambient Temperature: Up to 40 °C
Altitude: Suitable up to 2000 meters

As a supplier, VOLTAK is committed to providing RMUs that meet the highest standards of reliability, efficiency, and safety, tailored to diverse operational needs in electrical distribution networks.