I. Overview:

In medium voltage distribution systems, the commonly used ring main units include SF6 Gas Insulated Ring Main Units, Solid Insulated Ring Main Units, and environmentally friendly gas insulated ring main units. However, due to the greenhouse effect of SF6 gas and the difficulty in recycling solid insulation materials, the application of SF6 gas insulated ring main units and solid insulated ring main units will be limited. With the promotion of the green and environmentally friendly development concept of carbon peak and carbon neutrality by the country, environmentally friendly gas insulated ring main units will be used in more and more projects.

The VJH-12 series environmental protection switch is a new generation of circuit breakers for environmentally friendly gas insulated ring main units produced by our company in response to the design requirements of the State Grid's standardized ring main unit and the concept of green and environmentally friendly development. This product is mainly used in indoor and outdoor ring network switchgear in 12KV medium voltage distribution network systems for receiving and distributing electrical energy. The product fully meets the standardized technical requirements of the State Grid ring main unit and is suitable for side expansion and top expansion ring main unit solutions. The component universality rate of the upper and lower isolation solutions is over 90%. The product has high stability and strong universality, fully meeting the requirements

Type test requirements.

II. Usage environment:

--Surrounding air temperature: upper limit+40 ° C, lower limit -50 ° C;

--Relative humidity of the air: daily average not exceeding 95%, monthly average not exceeding 90%;

--Altitude ≤ 1500 meters (under standard inflation pressure);

--The seismic intensity shall not exceed level 8;

--A place without fire, explosion, serious pollution, chemical corrosion, and severe vibration.