Product Overview

The 35 kV High-voltage Gas-Insulated Switchgear (C-GIS, Gas-Insulated Switchgear) is a fully enclosed, fully insulated switchgear designed for medium-voltage power distribution systems. The rated voltage covers 35 kV (the actual operating voltage can reach 40.5 kV). It uses high-strength sulfur hexafluoride (SF₆) gas as the insulating medium, combined with a modular armored structure, to provide efficient and safe power distribution and control solutions for power plants, substations, new energy power stations and industrial power distribution networks.

Core Advantages

Fully insulated and fully enclosed design

The cabinet adopts a 3-5 mm thick stainless steel plate welding process, and the air tightness reaches IP67 protection level, ensuring that the internal components operate stably in humid, salt spray, high altitude (≤2000m) and strong wind and sand environments.

The main circuit (circuit breaker, disconnector, busbar) is completely sealed in the SF₆ gas chamber to prevent external dirt and pests from invading, with a service life of more than 30 years and maintenance-free.

Compact structure and flexible expansion

The size of a single cabinet (width × depth × height) is only 430 × 920 × 2135mm, which occupies 40% less space than traditional equipment and is suitable for space-constrained scenarios.

The modular design supports free combination of single to four units, which can be expanded into incoming cabinets, outgoing cabinets, busbar cabinets, metering cabinets, etc. to meet complex power distribution needs.

High-performance electrical parameters

Applicable to 50/60Hz AC system, meeting international standards such as IEC 62271 and GB 3906.

Intelligent monitoring and protection

Integrated microcomputer protection device (such as QBZ-IIA type) to achieve overcurrent, quick break, zero sequence and ground fault protection, and support remote control and fault recording.

Equipped with intelligent sensors and DTU terminals, it monitors gas pressure, temperature and partial discharge in real time, and uploads data to the cloud platform for predictive maintenance.

Application scenarios

New energy power station: As a high-voltage side device of wind power/photovoltaic collection station, it realizes efficient grid connection of clean energy and reduces land occupation and construction costs;

Industrial park power distribution: In heavy industrial environments such as steel and chemical industry, it resists high temperature and corrosive gases to ensure continuous production;

Urban infrastructure: It is used in places such as subways and airports that have extremely high requirements for power supply reliability, reduces the risk of power outages, and improves operation and maintenance efficiency;

Power supply in remote areas: Through modular design, it simplifies transportation and installation, and is quickly deployed in plateaus, islands and other areas to solve the problem of "last mile" power distribution.

Technical highlights

Environmentally friendly SF₆ gas application

Using low-pressure (0.04MPa gauge pressure) SF₆ gas, the gas chamber volume is small, and the leakage rate is less than 0.1%/year, which meets the EU IEC 62271-203 environmental protection standard.

Supports environmentally friendly gas (such as C4F7N mixed gas) alternatives to reduce the greenhouse effect potential (GWP).

High-safety operating mechanism

The circuit breaker adopts a permanent magnet/spring mechanism, the opening and closing time is ≤50ms, and the mechanical life exceeds 10,000 times.

The three-position disconnector integrates isolation and grounding functions to prevent misoperation and ensure personal safety.

Enhanced disaster resistance

The cabinet is equipped with an independent pressure relief channel, and the pressure release direction can be controlled during internal arc faults to avoid secondary damage.

The seismic design meets the requirements of 8-degree earthquake intensity and is suitable for geologically unstable areas.