Pansilang na flange para sa 126kV/252kV grounding switch

Ang insulation flange para sa 126kV/252kV grounding switch ay isang pangunahing komponente ng insulasyon na ginagamit sa high-voltage GIS equipment upang i-isolate ang grounding switch mula sa metal casing. Kailangan itong matugunan ang dual na performance requirements ng mataas na tensyon na insulasyon at mechanical sealing. Narito ang isang komprehensibong teknikal na analisis:
1、 Core performance requirements
Electrical performance
Ang 126kV insulation flange kailangan lumampas sa power frequency withstand voltage test ng 230kV/1min at lightning impulse withstand voltage test ng 550kV, may local discharge capacity na ≤ 5pC
Ang 252kV insulated flanges kailangan lumampas sa power frequency withstand voltage ng 400kV/1min at lightning impulse withstand voltage ng 950kV, may surface electric field strength na ≤ 15kV/mm
Mechanical and sealing performance
Kailangan matiis ang 50kA short-circuit current shock (3s), tensile strength ≥ 80MPa, deformation ≤ 0.45mm
Ang 252kV flange kailangan lumampas sa water pressure test na 1.5 times ang rated pressure, may interface stress na mas mababa sa 70MPa at SF6 gas leakage rate na ≤ 0.1% bawat taon
2、 Materials and processes
Mainstream materials
Glass fiber reinforced epoxy resin (126kV) at aramid/polyester fiber epoxy composite material (252kV), may dielectric strength na ≥ 30kV/mm
Process innovation
Ang vacuum impregnation process ay nagpapataas ng fiber infiltration at nagsasala ng panganib ng internal defects
Ang 252kV flange ay gumagamit ng 3D printing+gradient material composite process upang supilin ang electric field distortion
3、 Typical Applications and Standards
Industry standards
Kailangan sumunod sa GB/T 11022-2020 "Common Technical Requirements for High Voltage Switchgear and Control Equipment Standards"

Note: Customization with drawings is available