Series R-C graded gap assembly for MOV arrester

摘要

A gap assembly for a arrester includes a spark gap assembly and an MOV block disposed electrically in series with the spark gap assembly. The spark gap assembly includes a resistor, a capacitor disposed electrically in series with the resistor and a spark gap disposed electrically parallel to the resistor and to the capacitor.

主权项

1. A gap assembly for an arrester, comprising:
a spark gap assembly, including
an insulative housing having a first bore and a second bore;a resistor and a capacitor disposed in said first bore and electrically in series with one another to form a series connected resistor-capacitor combination;a spring member disposed in said first bore and biasing one of said capacitor and said resistor toward the other of said capacitor and said resistor; anda spark gap disposed in said second bore and electrically in parallel with said series connected resistor-capacitor combination; and an MOV block disposed electrically in series with said spark gap assembly, wherein said series connected resistor-capacitor combination has an impedance characteristic at a selected power frequency response range essentially matching an impedance of said MOV block.