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IEEE C37.112
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IEEE C37.112 96th Edition, September 19, 1996 Inverse-Time Characteristic Equations for Overcurrent Relays
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Description / Abstract:
The scope of this standard includes the review of various
existing analytic techniques used to represent relay operating
characteristic curve shapes and proposes analytical (formula)
representation of typical operating characteristic curve shapes to
foster some standardization of available inverse-time relay
characteristics provided in microprocessor or computer relay
applications.
Purpose
The purpose of this standard is to provide an analytic (formula) representation of typical relay operating characteristic curve shapes of various inverse-time relays to facilitate representation by microprocessor-type relays and promote a degree of standardization in the inverse shape of a selected curve.
Purpose
The purpose of this standard is to provide an analytic (formula) representation of typical relay operating characteristic curve shapes of various inverse-time relays to facilitate representation by microprocessor-type relays and promote a degree of standardization in the inverse shape of a selected curve.