Erasure of Parasitic Magnetic Fields on Emergency Medical Units

A.A.P. Paraskevopoulos, P.D. Bourkas, P.T. Tsarabaris, and D.D. Dimitriadou (Greece)


The conductive floor should be installed in places, where static charges are expected and there exist sensitive electric devices as oscillographs and computers. Magnetic field, Induction, Bithreaded winding, ground Thus, the installation is essential in laboratories, high voltage test rooms, places that computers exist but also into Hospitals and emergency medical units. Despite undisputable utility of the above two systems (perimetrical ground and conductive floor) the presence of a ti


a The presence of an external time varying magnetic field in a conductive loop, creates induction voltage. If the loop is closed, current will flow. Many fittings of contemporary electrical engineering are based on this phenomenon. However, undesirable results seem to appear in some cases. Such cases are the parasitic currents in perimetrical grounds and conductive floors in medical and intensive care units. Limitation of those parasitic currents is imposed due to the presence of patients but also of high sensitivity devices in these room areas. In this work the creation of parasitic currents in perimetrical grounds and conductive floor is described and also a way to restrict them by using Bithreaded winding (double wounded wire) is suggested. Lastly the use of Bithreaded winding is examined as a way to restrict undesirable magnetic fields in other devices. b c Figure 1: General arrangement of a conductive floor a) Conductive floor, b) ground mesh, c) floor of the building Figure 2: Grounded mesh of the conductive floor.

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