protective devices

Symbol: protective devices - carbon block, telephone protector block

Symbol: protective devices - current limiter

Symbol: protective devices - electrolytic or aluminium cell

Symbol: protective devices - fuse (form 1)

Symbol: protective devices - fuse (form 2)

Symbol: protective devices - fuse, supply side indicated by a thick line

Symbol: protective devices - horn gap

Symbol: protective devices - lightning arrester

Symbol: protective devices - multigap, general

Symbol: protective devices - network protector

Symbol: protective devices - protective gap

Symbol: protective devices - sphere gap

Symbol: protective devices - valve or film element