H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the AC cycle
H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
H01H33/006—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means adapted for interrupting fault currents with delayed zero crossings