Electrical distribution network overvoltage prevention having varistance/resistance series placed between input/output differential circuit breaker conducting default current when overvoltage appears with resistor limiting current.

摘要

The overvoltage removal mechanism has a varistance (1) in series with a resistance (9) and connected between an input wire (A0) and an output wire (B2) of a differential circuit breaker (2). When an overvoltage appears the varistance conducts the default current. The resistance limits the current flow.