Current passage indicator

Abstract

A fault current passage indicator (100) is fitted around the earth conductor (11) of a pole (10) supporting a section of an overhead electricity distribution network. This is achieved by means of a clip (110) adapted to provide a loop of ferromagnetic material enclosing the earth conductor (11). The indicator 100 is operable to detect transient earth currents flowing in the earth conductor (11). This is achieved by the provision of a sensor coil (101) is fitted around the clip (110) such that a portion of the clip (110) passes through the core of the sensor coil (101). Detected incidents of transient earth currents are recorded by the indicator (100) and data relating thereto can be retrieved by use of a suitable reader device (200). The indicator (100) is further adapted to scavenge power for operation from either transient earth currents or the reader device (200).

Dependencies are inferred from the claim text.