Comparison of current signatures for brush discharges using different resistance values in the discharge probes

L. Fast, B. Andersson, J. Smallwood, P. Holdstock, Jaakko Paasi

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    Incendiary brush discharges can occur when a large or grounded conductor approaches a charged insulator in the presence of flammable atmosphere. The probability of ignition of these discharges is essential to risk assessment in process industry. It is known that even if the total energy released in the discharge exceeds the minimum ignition energy (MIE), there may not be an ignition [1]. In a companion paper in this conference, we have reported simultaneous measurements of ignition and discharge current waveforms for brush discharges in an ethylene-air mixture in ignition tests based on an IEC standard test method [2]. In this paper we show that the resistance of the electrostatic discharge measurement system can have an effect on the peak discharge current signatures and charge transferred in the brush discharge from an insulating surface. The resistance of the discharge probe seems to affect the peak current value, but also to lesser extent the amount of charge transferred in the discharge.
    Original languageEnglish
    Article number012036
    Number of pages4
    JournalJournal of Physics: Conference Series
    Issue number1
    Publication statusPublished - 2011
    MoE publication typeA4 Article in a conference publication
    Event13th International Conference on Electrostatics - Wales, United Kingdom
    Duration: 10 Apr 201114 Apr 2011
    Conference number: 13


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