We introduce lubrication analysis of high voltage switches on the high voltage electrical contact

SF6 seal and spring operating mechanism lubrication with the typical applications

testing methods and measures according to relative DIN industrial standards.The electrical contact of a switch with the voltage lower than 60 kV can be lubricated with PAO+special soap grease.The electrical contact of a switch with the voltage higher than 60 kV must be lubricated with special PFPE+PTFE grease only.The SF6 dynamic seal should use PG

Si and PFPE based oil grease due to their good compatibility with the EPDM elastomer material of SF6 seal

and their high adhesion and low friction.The selection of the spring operating mechanism lubrication should consider anti-aging capacity of grease

as well as component’s load

speed

friction type

and working environment

in order to achieve long-term

safe

reliable and stable lubrication.