DIFF Subgroup
H01H 33/867 the fluid being air or gas
Introduced: January 1980
Full Title
High-tension or heavy-current switches with arc-extinguishing or arc-preventing means > Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid > the flow of arc-extinguishing fluid under pressure from the contact space being controlled by a valve > the fluid being air or gas
Of 1 combined children, 0 exist in both systems.
1 codes exist only in IPC.
IPC defines codes here since 1980.