NDLI: Determining the incendivity of electrostatic discharges without explosive gas mixtures

Content Provider	IEEE Xplore Digital Library
Author	von Pidoll, U. Brzostek, E. Froechtenigt, H.-R.
Copyright Year	2002
Description	Author affiliation: Phys.-Technische Bundesanstalt, Braunschweig, Germany (von Pidoll, U.; Brzostek, E.; Froechtenigt, H.-R.)
Abstract	An analysis of the dependence of the minimum ignition energy (MIE) of a given explosive atmosphere on voltage and capacitance has shown that the charge Q transferred by a spark is a more suitable criterion than the MIE to describe its incendivity because it much less depends on voltage and gap width. Tables are presented which allow the determination of the minimum transferred charge Q/sub min/ necessary to achieve spark ignition for a number of different explosive atmospheres. It was found that the values for spark discharges are identical with the values for brush discharges determined up to now. In the case of single brush or spark discharges, Q can be easily obtained by charging a product as highly as possible in a dry climate. Then a discharge to a ball electrode connected to the input of a coulombmeter is provoked. After removal of the electrode from the remaining electric field the displayed value is read and compared with the threshold value for Q. In the case of multiple discharges, e.g. from high voltage electrodes or textile materials, a high frequency shunt resistance connected to a quick oscilloscope is placed in the earth line of the ball electrode and the value for Q=/spl int/Idt is read. The proposed method is not suitable for determining the incendivity of permanent electric arc discharges.
Starting Page	277
Ending Page	283
File Size	1670351
Page Count	7
File Format	PDF
ISBN	0780374207
ISSN	01972618
DOI	10.1109/IAS.2002.1044100
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Brushes Atmosphere Electrostatic discharge Ignition Capacitance Explosives Threshold voltage Sparks Textiles
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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