Description：

QEFG  The series of environmentally friendly gas switch cabinets is a type of gas switch cabinet independently developed, which uses a safe and environmentally friendly mixed gas to replace SF6 as the insulating medium in the gas chamber, thus solving the problem of SF6 gas leakage pollution. It has a high level of operational safety and serves as a core unit in the distribution network, applied within the distribution network. The equipment mainly consists of modular components such as a sealed switch gas chamber, cable room base, mechanism room, and instrument room, among which the core components include the sealed circuit breaker switch body, load switch body, three-position isolation grounding switch body, and environmentally friendly insulating sleeve, achieving a fully sealed, maintenance-free structure.

The vacuum circuit breaker and vacuum load switch adopt a universal main structure design, better ensuring the consistency of the switch body; the main circuit's opening and closing is achieved using a simple and reliable spring mechanism, with a knob for opening and closing; the three-position isolation grounding switch uses a mature knife switch structure, which inherently prevents the risk of the main conductive circuit being energized while connecting to the ground.

QEFG The series of environmentally friendly gas switch cabinets is equipped with an intelligent online monitoring system that monitors the status of key parts within the switch cabinet in real-time, obtains status parameters, and automatically assesses the likelihood of faults occurring, providing strong assurance for the normal operation of the switch cabinet and the entire distribution line.

Typical Applications

QEFG The series of environmentally friendly gas switch cabinets is a green, environmentally friendly switch device that has undergone type testing and is suitable for various distribution systems, including under extremely harsh environmental conditions, such as:

• Substations：User substations, substations and switching stations for power systems and public facilities.

• Industrial Field：Wind power stations, high-rise buildings, airports, open-pit coal mines, subway stations, sewage treatment plants, port facilities, traction power supply systems, automotive industry, petroleum industry, chemical industry.Cement industry, thermal power plants, textile industry, paper industry, and emergency power supply systems.

Product Parameters

The voltage classes of some of these eco-friendly switchgears include 6kV, 6.3kV, 6.6kV, 6.9kV, 7.2kV, 10kV, 10.5kV, 11kV, 11.5kV, 12kV, 13.2kV, 13.8kV, 14.5kV, 14.4kV, 15kV, 15.5kV, 15.6kV, 17.5kV, 20kV, 21.9kV, 22kV, 24kV, 30kV, 33kV, 33.5kV, 34.5kV, 35kV, 36kV, 38kV, 38.5kV, 40.5kV, 44kV, 45kV, 46kV, 66kV and 69kV. and customization is available.

Operating Conditions

Product Features

Safe to Use

• What you see is what you get, the switch panel has reliable opening and closing indicators.

• Primary components are enclosed in a sealed gas chamber, and the outer shell can be safely touched.

• The specially designed insulating structure effectively optimizes the surrounding electric field distribution.

• Perfect mechanical and electrical interlocks effectively avoid misoperation.

Environmentally Friendly

• Uses self-developed environmentally friendly mixed gas to replace SF6 gas as the arc extinguishing and insulating medium.

• Minimizes the use of epoxy resin APG molded structures as insulating media.

• The "3-in-1" integrated design of circuit breaker, isolation, and grounding functions is more streamlined.

• Compact size, occupies less space.

• Uses high-strength thermoplastic recyclable materials as the main frame structure of the switch.

Intelligent Design

• Advanced protection, control, and monitoring functions.

• Easily enables distribution network automation, preparing for smart grids.

User-Friendly

• Modular design, can be combined arbitrarily according to customer needs.

• Cable connections and user operation interfaces are located at the front of the cabinet for easy operation and maintenance.

• Large cable installation space, horizontal arrangement of cable plugs, convenient for phase switching.

• The operation panel is clear, simple, and easy to understand.

Maintenance-free, low total cost.

• The cabinet structure is compact, small in size, space-saving, and easy to transport.

• Sealed gas chamber at 0 gauge pressure, gas chamber leakage does not affect functionality.

• Uses maintenance-free vacuum circuit breakers or vacuum load switches.

• Primary components are built into a permanently sealed enclosure.

• No need for SF6 pressure checks.

• Can be equipped with a metal enclosure or GRC enclosure, suitable for outdoor ring network cabinets.

Standards

QEFG£The series of solid insulated switch cabinets meet the following standards and specifications:

GB 1984-2003:High Voltage AC Circuit Breakers
GB 3906-2006: 3.6kV ~ 40.5KV AC Metal Enclosed Switchgear and Controlgear GB 1985-2004: High Voltage AC Isolators and Grounding Switches
GB 3804-2004: 3.6KV ~ 40.5KV High Voltage AC Load Switches
GB 16926-2009: High Voltage AC Load Switches - Fuse Combination Devices
GB/T 11022-1999: Common Technical Requirements for High Voltage Switchgear and Controlgear Standards IEC 60529: Degree of Protection Provided by Enclosures (IP Code)