The intelligent SF₆ ring main unit fully encloses all live parts inside an SF₆ gas-insulated tank with a protection rating of IP67, completely isolating the switching device from external environmental influences and ensuring safe and reliable operation.

Key Features

Fully insulated, fully sealed, maintenance-free

Three-position load switch with interlocking; clear switch position indication and distribution status display for enhanced safety

Programmed design, standardized process control, and modular assembly for consistent quality

Reliable pressure relief channel and arc-fault-resistant design; passed internal arcing test

Optional DTU and other intelligent devices to enable smart distribution network functionality

Multiple configurations available: top or side cable outlet, emergency high-voltage power interface, secondary module, and aviation plug interface

Custom solutions available based on customer requirements

Applicable Standards

GB/T 3906: Alternating-current metal-enclosed switchgear and controlgear for rated voltages 3.6kV to 40.5kV

GB 1984: High-voltage alternating-current circuit-breakers

GB/T 3804: High-voltage alternating-current load switches for rated voltages 3.6kV to 40.5kV

DL/T 593: Common technical requirements for high-voltage switchgear and controlgear standards

GB/T 1985: High-voltage alternating-current disconnectors and earthing switches

Technical parameters

Applicable environment

High temperature: +60 ℃

Minimum temperature:-40 ℃

Relative humidity: daily average not more than 95%, monthly average not more than 90%

Seismic grade: 8

Altitude: ≤ 2000m