Designs for Mounting Reed Switches Inside Complete Conductors

The use of reed switches is shown to be one of the ways of solution of the well-known problem of designing relay protection devices without current transformers. Four patented designs for mounting reed switches inside complete conductors are considered. In the first design, a bar with reed switches is passing through slots of two separating plates of three-phase complete conductors. In the second design, a bent bar connects a plate with reed switches with the separating plate of the conductor. In the third design, the housing with a cover is used instead of the plate, inside which there are a bar with reed switches, a time relay, and an output protection relay. The fourth design is attached to the inner side of the hole cover of a single-phase complete conductor by means of an adjustable rod with a plate and a disk with a reed switch attached.