protector block

protector block

[prə′tek·tər ‚bläk]
(electricity)
Rectangular piece of carbon with an insulated metal insert, or porcelain with a carbon insert, constituting an element of a protector; it forms a gap which will break down and provide a path to ground for voltages over 350 volts.
References in periodicals archive ?
The built-in screen protector blocks out scratches and dust, while the shell and outer slipcover absorb and dissipate shock.
Corning Cable Systems' central office surge protection products, which include 5-pin, 4-pin, 1-pin protector modules, related protector blocks, connectors and protector panels, are sold principally to Telcos for use in central office and remote access cabinet surge protection applications in the United States, Canada and Mexico.