Title:
【発明の名称】プラグイン式過渡電圧サプレッサー・モジュール
Document Type and Number:
Japanese Patent JPH04506145
Kind Code:
A
Abstract:
A plug-in surge suppressor module for insertion into a circuit breaker panel includes four stacks of metal oxide varistors (MOVs) arranged in a cloverleaf pattern on opposite sides of an elongated copper ground bus attached to one lead of each of the metal oxide varistors. The other leads of two of the stacks of metal oxide varistors are attached to a terminal of a U-shaped first resistive wire fuse, another terminal of which is connected to a first AC power line conductor. The other leads of the other two stacks of MOV's are attached to a terminal of a second U-shaped resistive wire fuse, another terminal of which is connected to a second AC power line conductor. A monitor circuit senses the presence of power and continuity of both fuses by pulsing a light emitting indicator diode every cycle of the AC line. A low frequency oscillator circuit produces slow blinking of the light emitting indicator diode which alerts an observer to replace te surge suppressor module if one of the fuses fails.
Inventors:
Brady, Peter, Jay.
Application Number:
JP50900890A
Publication Date:
October 22, 1992
Filing Date:
June 11, 1990
Export Citation:
Assignee:
Square D Company
International Classes:
H02H9/04; (IPC1-7): H02H9/04
Attorney, Agent or Firm:
Akira Asamura (3 outside)