Reed Switch Overcurrent Protection: New Approach to Design
Issabekov D.D. Mussayev Z.B. Markovskiy V.P. Kislov A.P. Urazalimova D.S.
June 2024Multidisciplinary Digital Publishing Institute (MDPI)
Energies
2024#17Issue 11
The problem of getting rid of expensive and metal-intensive current transformers has been declared by CIGRE as strategically important for the electric power industry. However, almost all traditional current protections receive information from measuring current transformers. In this work, a resource-saving reed switch overcurrent protection without current transformers is suggested, which can be used as an alternative to traditional current protections for 6–10 kV electrical installations connected to a switchgear cell. The protection is designed following the novel method we have developed based on inductance coils. Inductance coils measure the electromotive force under different operation modes of an electrical installation and at different points inside the switchgear cell it is connected to; the EMF values are recalculated in the values of magnetic induction, and reed switches are mounted instead of inductance coils at the points where the magnetic induction is maximal. Moreover, these values are sufficient to detect phase-to-phase short circuits in the electrical installation. The dependence of the induction value on the position of an inductance coil inside the cell is derived with the use of the simplest formula of the Biot–Savart law. The results can be used at large and small industrial enterprises, electric power stations, and substations of plants; they can be interesting for the scientific community because they help to solve the topical problem of the electric power industry.
cell , current , current transformer , inductance coil , induction , overcurrent protection , reed switch
Text of the article Перейти на текст статьи
Department of Electrical Power Engineering, Faculty of Energetics, Toraighyrov University, Lomov Str. 64, Pavlodar, 140008, Kazakhstan
Department of Electrical Engineering and Automation, Faculty of Energetics, Toraighyrov University, Lomov Str. 64, Pavlodar, 140008, Kazakhstan
Department of Electrical Power Engineering
Department of Electrical Engineering and Automation
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026