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A universal procedure for evaluation and application of surge-protective devicesThe source, nature, and frequency of occurrence of transients must be identified and a representative standard test wave chosen for proof testing. The performance of candidate suppressor devices then can be evaluated against the withstand goals set for the equipment. The various suppressors divide into two classes of generic behavior. The key to a universal procedure for evaluating both classes lies in representing transients as quasi-current sources of defined current impulse duration. The available surge current is established by the Thevenin equivalent transient voltage and source impedance. A load line drawn on the V-I characteristic graph of the suppressor quickly determines the clamping voltage and peak current. These values then can be compared to the requirement. The deposited energy and average power dissipation for multiple transients also can be calculated. The method is illustrated with a design example for motor vehicle alternator load dump suppression.
Document ID
19800013458
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Date Acquired
August 10, 2013
Publication Date
April 1, 1980
Publication Information
Publication: NASA. Langley Res. Center Lightning Technol.
Subject Category
Meteorology And Climatology
Accession Number
80N21944
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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