The application of the domestic air pressure load switch in the environmental gas cabinet is still blank. Based on the reliability of the vacuum interruption, the opening and breaking function of the environmental gas cabinet is still achieved by the vacuum bubble. Therefore, the research difficulty of environmental protection gas cabinet is concentrated on insulation strength, air chamber structure and temperature rise.

Main points of design:

1. Verify the insulation strength

The 3D simulation model is established by Solidwords software, and the electric field simulation is calculated by Ansys software. The electric field structure is checked and corrected with the calculation results, and the insulation performance is met in theory. The pressure test is carried out in the atmospheric environment, which verifies the reliability of the theoretical calculation and achieves the design requirement of air insulation.

2, verify the structure strength of gas chamber

The Ansys software is used to simulate the deformation of gas box, and the calculation results and electric field simulation results are used to check and correct the gas box structure, and the influence of the gas box deformation is optimized in theory. The aeration test is carried out to verify the reliability of the theoretical calculation.

3. Verification of temperature rise

The Ansys software is used to simulate the temperature rise and air flow in the gas chamber of the switch cabinet, which is filled with SF6 and N2, to verify whether the replacement gas is in accordance with the heat dissipation requirements of the switchgear chamber under the rated working conditions, and the calculation results are used to verify and optimize the conducting parts. The temperature rise test is carried out according to the rated current 1.1 times, which verifies the reliability of the theoretical calculation.

Now the impact of the greenhouse effect on the environment is gradually emerging, the climate warming, the melting of the Millennium iceberg, has slowly begun to threaten the safety of people's living environment, not optimistic, however, SF6 gas as a greenhouse gas will be eliminated sooner or later, so the environmental gas cabinet will become a new trend, the prospect of development will be possible. View.