SF6 Gas-Insulated Ring Main Unit

Overview

The SF6 gas-insulated ring main unit (RMU) uses SF6 gas as the primary insulation medium, with all live parts sealed in stainless steel gas compartments, complying with GB 3906 and IEC 62271-200. It suits 10kV/20kV distribution ring networks, switching stations and customer connections, being compact, maintenance-free and immune to humidity, pollution and condensation.

Features

• Fully sealed stainless steel gas compartments with extremely low annual SF6 leakage for true maintenance-free operation;
• Compact cabinet occupying little space, flexibly combined into 2/3/4-circuit and extension units;
• Maintenance-free primary circuit; secondary circuit options include motor operation, remote control and fault indication;
• Integrable protection, monitoring and distribution automation terminals (DTU/FTU);
• Suitable for outdoor enclosure or indoor layout, with gas compartment protection up to IP67.

Selection Advice

Select by number of incoming/outgoing circuits, rated current and breaking capacity. For space-constrained sites such as urban grids, underground distribution and industrial parks, gas-insulated solutions save footprint.

Applications

Urban distribution ring networks, underground substations, industrial park switching stations, residential community substations, PV and wind step-up collection points.