CPC Subgroup
H01T 4/08 structurally associated with protected apparatus (with switches H01H9/14; with fuses H01H85/44)
Full Title
Overvoltage arresters using spark gaps (H01T2/00 takes precedence; overvoltage protection circuits using spark gaps H02H9/06) > structurally associated with protected apparatus (with switches H01H9/14; with fuses H01H85/44)