SPARK DETONATION DEVICE INCLUDING A VARISTOR CAPABLE OF PREVENTING THE GENERATION OF SPARK BY NOT ONLY CURRENT OF LOW VOLTAGE, BUT ALSO CURRENT OF HIGH VOLTAGE

摘要

PURPOSE: A spark detonation device including a varistor is provided to obtain stability form electric danger by generating flame by only electric blasting machine over specific voltage.;CONSTITUTION: A spark detonation device including comprises: a housing, a varistor(35), and a spark terminal(32). The varistor is installed in the housing, and is connected to one or two lines of a powder input terminal in series. A circuit is disconnected at current below voltage for operating the varistor, thereby not generating spark discharge, and the circuit is connected at current for operating the varistor, thereby generating spark discharge.;COPYRIGHT KIPO 2012