detection and signalisierungsvorrichtung a leakage current in an overvoltage arresters or an insulator.

摘要

A device according to the invention comprises, in a housing (10) incorporating a metal part (2) integral with an end fitting of the arrester (1), or of the insulator, and equipped with a breakable window: - a transformer of the said current whose primary consists of the said metal part (2), and whose secondary is connected to a peak-limiter circuit for rendering inoperative current pulses due in particular to lightning strikes, - a heating resistor powered by the said transformer and constituting an igniter for a pyrotechnic substance in which it is embedded, the said substance being intended to fracture the said breakable window, - and preferably an indicating means (30) which can be freed by the fracturing of the said breakable window. IMAGE