ARRESTER FOR HIGH PERFORMANCE LOW VOLTAGE COMMUNICATION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an arrester in which a machine to be protected is insusceptible to a voltage required for generating spark while sustaining the limit voltage at a low level, and the arrester is not damaged by a lightning surge having high energy while keeping the durability for a long term. ;SOLUTION: The inventive arrester is a composite arrester comprising a first resistive element 1 having an impedance, a second resistive element 2 having a high voltage dependent nonlinear coefficient connected in series with the first resistive element 1, and an air discharge gap 3 connected in parallel with the series structure of the first and second resistive elements 1, 2. Assuming the opposite ends of the first resistive element 1 are a, b, the opposite ends of the second resistive element 2 are c, d, and the opposite ends of the air discharge gap 3 are e, f, a terminal 4 fixed between the ends f and a is an input terminal, a terminal 5 fixed between the ends b and c is a load terminal, and a terminal 6 fixed between the ends d and e is a ground side terminal.;COPYRIGHT: (C)1998,JPO