Modelling of sparking contacts for hazardous area applications

Shekhar, Rajiv and Uber, Carsten (2015). Modelling of sparking contacts for hazardous area applications. In: Proceedings of the 2015 Sixty-First Ieee Holm Conference On Electrical Contacts (Holm). 61st IEEE Holm Conference on Electrical Contacts (Holm), San Diego CA, United States, (347-352). 11-14 October 2015. doi:10.1109/HOLM.2015.7355119


Author Shekhar, Rajiv
Uber, Carsten
Title of paper Modelling of sparking contacts for hazardous area applications
Conference name 61st IEEE Holm Conference on Electrical Contacts (Holm)
Conference location San Diego CA, United States
Conference dates 11-14 October 2015
Convener Chen, Zhuanke
Proceedings title Proceedings of the 2015 Sixty-First Ieee Holm Conference On Electrical Contacts (Holm)
Journal name Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts
Place of Publication Piscataway, NJ United States
Publisher Institute of Electrical and Electronics Engineers
Publication Year 2015
Sub-type Fully published paper
DOI 10.1109/HOLM.2015.7355119
Open Access Status Not Open Access
ISBN 9781467393416
ISSN 1062-6808
Volume 2015-December
Start page 347
End page 352
Total pages 6
Chapter number 50
Total chapters 62
Collection year 2016
Language eng
Abstract/Summary An understanding of transient contact sparks and how they interact with electrical systems is of critical importance to hazardous area applications, where such sparks are at risk of igniting flammable atmospheres. Hazardous area electrical systems are distinguished from more typical applications of spark modelling by their low voltages and currents. This paper applies an empirical, quasi-static modelling approach to such spark discharges. The use of a classical parametrised empirical model is proposed, and justified with a qualitative treatment of the underlying physics. Parameter values for the model are calculated by studying sparks with constant length and constant current respectively, and then combining the observed trends into the proposed model. The model, is then validated against experimental data obtained from sparks with time varying current and length. The relevance of dynamics arising from energy storage in the arc column is also considered, identifying the situations where a quasi-static approach is sufficient. Finally, methods for determining the thermal output of the spark, the ultimate goal of spark modelling in hazardous area applications, are discussed.
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

 
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