The QLG series 40.5kV loop network cabinet, also known as the 35kV gas-insulated switchgear, is an SF6 gas-insulated metal-enclosed switchgear independently developed and manufactured by our company. This equipment uses SF6 gas as the insulating medium and SF6 gas or vacuum as the arc-quenching medium. The load switch, circuit breaker, and live busbars are all sealed within a closed stainless steel shell filled with a certain pressure of SF6 gas. External connections are made through bushings and cable joints, forming a fully insulated and fully enclosed structure that effectively prevents flooding and resists contamination, making it suitable for various harsh environments and ensuring operational reliability and personal safety.

The 35kV gas-insulated switchgear utilizes high-performance SF6 insulating gas, significantly enhancing its insulation properties. Its compact design results in a small footprint, which is highly advantageous for miniaturization. The use of SF6 gas effectively improves the electrical performance of the loop network cabinet. Additionally, the fully enclosed structure ensures that the core components of the switch are unaffected by external environmental conditions, greatly expanding the range of applications for this type of loop network. The maintenance-free product structure also significantly reduces maintenance work and lowers maintenance costs.

Features

Miniaturization

By replacing air insulation with SF6 gas insulation in metal-enclosed switchgear, each unit is housed within the cabinet, greatly reducing the overall dimensions.

Safety

The conductive parts of the main circuit are sealed in SF6 gas, and the high-voltage live conductors are enclosed, making them immune to changes in external environmental conditions. This allows the equipment to be used in harsh environments, ensuring long-term safe operation with high reliability, and eliminating the risks of electric shock and fire.

Maintenance-Free

All high-voltage components are either gas-sealed or metal-enclosed, preventing rust and corrosion, and requiring minimal maintenance. Additionally, the use of vacuum circuit breakers with long electrical lifespans and stable performance ensures maintenance-free operation.

Modularity

The gas-insulated switchgear combines high-voltage components into several standard modules, offering a compact and expandable structure. Various combinations can meet the requirements of different main wiring schemes and suit various application scenarios.