protective devices

Symbol: protective devices - carbon block, telephone protector blockcarbon block, telephone protector block
Symbol: protective devices - current limitercurrent limiter
Symbol: protective devices - electrolytic or aluminium cellelectrolytic or aluminium cell
Symbol: protective devices - fuse (form 1)fuse (form 1)
Symbol: protective devices - fuse (form 2)fuse (form 2)
Symbol: protective devices - fuse, supply side indicated by a thick linefuse, supply side indicated by a thick line
Symbol: protective devices - horn gaphorn gap
Symbol: protective devices - lightning arresterlightning arrester
Symbol: protective devices - multigap, generalmultigap, general
Symbol: protective devices - network protectornetwork protector
Symbol: protective devices - protective gapprotective gap
Symbol: protective devices - sphere gapsphere gap
Symbol: protective devices - valve or film elementvalve or film element