Low voltage electrical overvoltage circuit protection having parallel varistor/differential switching circuit with conducting varistor creating short circuit/creating switching default current.

摘要

The overvoltage removal mechanism has a parallel varistor (1) with a differential circuit breaker (2). The circuit is placed between an input connection (A1) and output wires (B2). When an overvoltage appears the varistor conducts creating a default current for the circuit breaker.