Overvoltage counter for lightning arresters - is designed to be clamped onto lightning conductor and has two Zener diodes mounted head to tail

摘要

The overvoltage counter has an insulated fixing means (31, 32) which fixes the counter at a given distance from the axis of the lightning conductor (2) and perpendicular to it. The counter contains a winding which is perpendicular to the axis of the conductor. At the terminals of the winding are a rectifying circuit and voltage limiting components as well as a filter circuit. The counter includes an electron counter with its own autonomous supply source. The rectifying and voltage limiting circuits include two diodes which are connected at each end of the winding and two zener diodes mounted head to tail in parallel with the winding. The digital counter has two coded decimal binary decades in series. Each are connected to a display system (15, 16) via a decoder.