# Budapest University of Technology and Economics, Faculty of Electrical Engineering and Informatics

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Electric Switching Devices

A tantárgy neve magyarul / Name of the subject in Hungarian: Villamos kapcsoló készülékek

Last updated: 2014. február 24.

 Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics
 Course ID Semester Assessment Credit Tantárgyfélév VIVEA336 6 3/1/0/v 4
3. Course coordinator and department Dr. Berta István,
6. Pre-requisites
Kötelező:
(Szakirany("AVIvillen", _)
VAGY Training.code=("5NAA7") )

ÉS NEM ( TárgyEredmény( "BMEVIVEAC02" , "jegy" , _ ) >= 2
VAGY
TárgyEredmény("BMEVIVEAC02", "FELVETEL", AktualisFelev()) > 0)

A fenti forma a Neptun sajátja, ezen technikai okokból nem változtattunk.

A kötelező előtanulmányi rendek grafikus formában itt láthatók.

7. Objectives, learning outcomes and obtained knowledge The course presents the interactions between the electric networks and the low and high voltage switching devices due to their operations. The course also describes the architecture of switching devices and fuses and explains their functioning principles.
8. Synopsis Electric switching devices in low and high voltage networks. Calculation models and methods of switching devices and networks. Power-on of direct and alternating current. Short circuit close to the generator or far from the generator. Capacitive load and the power-on of a transformer without load. Thermal stress, modeling of heating phenomena due to normal operation, overload, or short circuit current. Mechanical stress. Calculation methods of electro dynamical forces applied to the conductors. Phenomena in stationary electric arc. The electric arc as circuit element. Characteristics of stationary and dynamic arcs. Characteristics of the quasi stationary arc and its elimination. Properties of the electric arcs in vacuum. Ideal power-off of direct and alternating current. Ideal power-off of high voltage alternating current. Break of an alternating current arc at high voltage. Dangers of reigniting when load currents are cut. Break of an alternating current arc at low voltage. The current limiting effect of the arc. Architecture and operation principles of high voltage SF6 gas and vacuum breaker switches. Architecture and operation principles of fuses, low voltage switches and contactors. Architecture and operation principles of high, medium and low voltage disjunctors and disjunctor-like devices.
14. Required learning hours and assignment
 Kontakt óra Félévközi készülés órákra Felkészülés zárthelyire Házi feladat elkészítése Kijelölt írásos tananyag elsajátítása Vizsgafelkészülés Összesen