Qualified environmental gas cabinet should meet the conditions:

1. green environmental protection

The use of nitrogen or dry air insulation, no or less greenhouse gas emissions, the product life cycle after the material recovery of more than 90%, except for other insulation parts outside the casing is not hard to degradation of epoxy resin materials, to achieve the goal of green environmental protection.

2. must be fully insulated and fully sealed

The switch structure of the environmental protection gas cabinet should adopt a fully insulated and totally enclosed structure, which can be applied to all working conditions without being affected by external environment. All the closed structure is to seal all the charged parts in a gas box, that is, to meet the requirements of miniaturization. At the same time, it will improve the operation reliability, and make the environmental protection ring network cabinet free of maintenance.

3. micro positive pressure design

The environmental gas cabinet should be based on the design concept of air insulation, using the micro positive pressure technology, that is, the pressure inside the gas box is slightly higher than the external atmospheric pressure, which can effectively reduce the leakage rate. Even if the gas box has a leakage fault, it will still maintain enough insulation strength to not sound normal operation at zero surface pressure. Another important function of the micro positive pressure design is to prevent moist gases from entering the air chamber and ensure the insulation performance of the components inside the gas box.

4. fracture visibility

The design of environmental gas cabinet adopts the principle of optical imaging, with a smaller observation window to realize a large range of observation, so that the three station isolation grounding switch can be visible, to ensure the safety of the operation personnel of the equipment. The three station isolation grounding switch can ensure the reliability of the operation, and fully satisfy the operation and operation process formulated by the electric power department.

5. cost advantage

The design idea of environmental protection gas cabinet should eliminate the idea of using epoxy pouring insulation. The method of optimizing electric field should be adopted to ensure the reasonable insulation distance to achieve the purpose of effective insulation, which greatly reduces the cost of the opening of the epoxy parts and has the cost advantage. In addition, it can also effectively avoid the technical problems existing in the solid insulation. The setting of the whole cabinet is 20pc and below.

6. integrated intelligence

It can integrate the function of distribution automation. With the demand of the automation construction of distribution network, the products of environmental protection ring network cabinet need to have integrated automation function in the future. The one or two complete fusion will not need any reconfiguration such as DTU, which will control power supply, automation function, opening feature collection function, communication function and so on. And integration, function integration and intelligent will also be an important feature of environmental protection ring network cabinet.