Kontaktörlerde Anahtarlama Sayısının Elektrik Ark Erozyonuna ve Kontaktör Yüzey Hasarlarına Etkileri

Year 2021, Issue: 27, 722 - 734, 30.11.2021

Mustafa Nuri Sav , Sinan Fidan , Satılmış Ürgün

https://doi.org/10.31590/ejosat.946690

Abstract

Elektrik ark erozyonu, elektriksel devrelerin anahtarlama görevi yapan elemanlarında ortaya çıkabilen önemli hasar türlerinden bir tanesidir. Hassas elektrik devrelerinin kararlı bir çalışma gerçekleştirebilmesi için, ark erozyonuna bağlı yüzey hasarlarının mümkün olduğunca az olması istenir. Ark erozyonu, kontaktör servis ömrünü kısaltıcı etkilere yol açar. Kontaktör ömrünü uzatabilmek için yapılan çalışmalar ark erozyonu miktarını azaltmak veya ark şiddetini düşürmek üzerine yoğunlaşmıştır. Ark erozyonunun gerçekleşme karakteristiği, farklı disiplinlerin çalışma alanı olan birbirinden bağımsız birçok etken tarafından belirlenmektedir. Bu çalışmada mekanik, metalurjik ve elektrik olmak üzere farklı disiplinlerden hibrit bir araştırma yöntemiyle, Ag-Ni kontaktörlerin 12VDC 5A yük altında rezistif bir devrede farklı çevrimler sayılarında gözlemlenen deformasyonları incelenmiştir. Deneysel verilerden elde edilen sonuçlar literatürdeki çalışmalarla karşılaştırmalı olarak değerlendirilmiş; mekanik, metalurjik ve elektriksel parametrelerin elektrik ark erozyonuyla beraber kontaktör yüzeylerinde ortaya çıkardığı pürüzlülük mekanizmaları ortaya konulmuştur.

Keywords

Ark erozyonu, Anahtarlama sayısı, Yüzey pürüzlülüğü

The Effects of the Number of Switching in Contactors on Electric Arc Erosion and Contactor Surface Damages

Abstract

Electric arc erosion is one of the important types of damage that can occur in the switching elements of electrical circuits. In order for sensitive electrical circuits to perform stable operation, surface damage due to arc erosion is desired to be as little as possible. Arc erosion leads to effects that shorten the contactor service life. Studies conducted to extend the lifetime of the contactor have focused on reducing the amount of arc erosion or decreasing the arc intensity. The occurrence characteristic of arc erosion is determined by many independent factors that are the field of study of different disciplines. In this study, the deformations of Ag-Ni contactors in a resistive circuit under 12VDC 5A load at different number of cycles were investigated using a hybrid research method from different disciplines including mechanical, metallurgical and electrical. The results obtained from the experimental data were evaluated in comparison with the studies in the literature; Roughness mechanisms caused by mechanical, metallurgical and electrical parameters along with electric arc erosion on contactor surfaces have been revealed.

Keywords

Arc erosion, Number of switching, Surface roughness

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