Resource-Saving Protection of Electrical Installations with Inductive Coils

It is worth noting that a key challenge in today's electric power systems relates to the implementation of relay protection for high-voltage electrical installations. This practice has been a topic of discussion at several international conferences on large power systems (CIGRE). It has been suggested that the use of traditional current transformers (CTs) with ferromagnetic cores in such contexts may be a concern. These devices are known for their intensive use of metal, their substantial size, and the cost of their insulation. This article proposes a novel approach to current protection for electrical installations, utilising inductance coils as a means to illustrate the concept. The selection of inductance coils is predicated on their numerous advantages over other magnetosensitive elements in terms of relay protection. However, the feasibility of employing these coils for current protection in various electrical installations has not yet been thoroughly examined. This paper aims to address these concerns in the context of developing current protection for electrical installations using inductance coils fed from complete switchgear (CSG) with voltages ranging from 6 to 10 kV. The proposed protection facilitates the adjustment of settings through remote manipulation of the inductance coil, relative to the plane of the current-carrying busbar, utilising a micromotor. It is hoped that the elimination of costly and metal-intensive current transformers with ferromagnetic cores will contribute to reduced material expenses for the construction of current protection for electrical installations of any type and voltage class.