EARTHING ARRANGEMENT FOR ELECTRICAL PANEL

摘要

A rigid electrical panel has both a flexible printed circuit and an electromagnetic protection layer embedded therein. The flexible printed circuit has an integral electromagnetic shield. The integral electromagnetic shield and the electromagnetic protection layer are electrically isolated, so as to provide independent grounding paths. The independent grounding paths can be individually tested for safe operation.

主权项

1. A rigid electrical panel comprising at least a part of an electrical system of a gas turbine engine, the panel comprising:
a rigid material; a flexible printed circuit at least partly embedded in the rigid material, the flexible printed circuit comprising at least one electrical track arranged to carry electrical signals relating to the operation of the gas turbine engine in use, and at least one integral electromagnetic shield; an electromagnetic protection layer electrically isolated from the flexible printed circuit; a flexible printed circuit outlet terminal to which at least the integral electromagnetic shield is electrically connected; and an electrically conductive grounding element to which the electromagnetic protection layer is electrically connected, wherein the flexible printed circuit outlet terminal and the electrically conductive grounding element are electrically isolated, such that the integral electromagnetic shield can be grounded via the flexible printed circuit outlet terminal and the electromagnetic protection layer can be separately grounded via the electrically conductive grounding element.