IEEE C62.41-1991 pdf download.IEEE Recommended Practice for Surge Voltages in Low-Voltage AC Power Circuits.
Abstract:A practical basis is provided for the selection of voltage and current tests to be applied in evaluating the surge withstand capability of equipment connected to utility power circuits, primarily in residential, commercial, and light industrial applications. The recommended practice covers the origin of surge voltages, rate of occurrence and voltage levels in unprotected circuits, waveshapes of representative surge voltages, energy and source and impedance. Three locations categories are defined according to their relative position from the building service entrance. For each category, representative waveforms of surge voltages and surge currents are described, organized in two recommended standard waveforms and three suggested additional waveforms.
Keywords: ac power circuits, current tests, surge monitoring, surge test waveforms, surge voltages, surges, test waveforms, voltage tests, wave shape.
The purpose of this recommended practice is to provide information on surge voltages in low-voltage ac power circuits. With this information, equipment designers and users can evaluate their operating environment to determine their need for surge-protective devices. The document characterizes electrical distribution systems in which surges exist, based upon the data that have been recorded in interior locations on single-phase and three- phase residential, commercial, and industrial power distribution systems.
There are no specific models that are representative of all surge environments; the complexities of the real world need to be simplified to produce a manageable set of standard surge tests. To this end, a surge environment classification scheme is presented. This classification provides a practical basis for the selection of surge-voltage and surge-current waveforms and amplitudes that may be applied to evaluate the surge withstand capability of equipment connected to these power circuits. It is important to recognize that proper coordination of equipment capability and environment characteristics is required: each environment and the equipment to be protected has to be characterized and the two reconciled.IEEE C62.41-1991 pdf download.
IEEE C62.41-1991 pdf download
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