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Optimizacija tokokroga zaščitnega stikala na diferenčni tok
ID SMRKOLJ, ALJAŽ (Author), ID Petkovšek, Marko (Mentor) More about this mentor... This link opens in a new window

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PID: 20.500.12556/rul/3ccb9111-8768-47bd-a74d-6e3374b34b3e

Abstract
V magistrski nalogi, ki sem jo izdelal v razvojnem oddelku stikal podjetja ETI d.d., sem zasnoval in optimiral tokokrog nove generacije zaščitnega stikala na diferenčni tok EFI 003, ki je občutljiv na sinusne in pulzirajoče enosmerne diferenčne tokove. V prvem delu sem opisal pomen in delovanje zaščitnega stikala v nizkonapetostnih električnih inštalacijah. Nato sem izmeril parametre tokokroga obstoječega EFI stikala in jih uporabil za izgradnjo simulacijskega modela v programu Multisim. Zaradi lažje končne montaže v proizvodnji sem želel uporabiti samo en primarni ovoj diferenčnega transformatorja, zato sem zanj najprej izbral ustrezno jedro, nato pa določil parametre prilagodilnega vezja in izbral prožilni rele. Z optimizacijo parametrov novega stikala sem dosegel, da so izklopni tokovi, ki jih predpisujeta standarda za zaščitna stikala na diferenčni tok (EN 61008 in IEC 61008), znotraj predpisanih mej, na koncu pa vse skupaj potrdil z meritvami na realnem zaščitnem stikalu.

Language:Slovenian
Keywords:diferenčni transformator, diferenčni tokokrog, prožilni rele
Work type:Master's thesis/paper
Organization:FE - Faculty of Electrical Engineering
Year:2016
PID:20.500.12556/RUL-86587 This link opens in a new window
Publication date in RUL:21.10.2016
Views:1860
Downloads:473
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Secondary language

Language:English
Title:Circuit optimization of residual current circuit breaker
Abstract:
I made my master's thesis in the development department of switches in ETI d.d. My task was to design and optimize a new circuit of a differential circuit breaker EFI 003 type A. In the first part, I decscribed the importance and principal operation of the differential switch. Then I made measurements of parameters on the existing differential circuit breaker and used the results to build a model in Multisim. To optimize the final assebly procedure, I wanted to use only one primary turn on the differential transformer, so I used an appropriate core and then determined parameters of the circuit and also selected a suitable trigger relay. With appropriate selection of parameters, the breaking currents of the new differential circuit breaker are inside the limits, that are defined by standards (EN 61008 and IEC 61008), which was also verified with measurements on real differential circuit breaker.

Keywords:differential transformer, differential circuit, trigger relay

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