Transcription of Working with trip characteristic curves - ABB
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Working with trip characteristic curves - ABB
Low voltage circuit breakersWorking with trip characteristic curvesLow Voltage Products & Systems 1 ABB Inc. 888-385-1221 1 SXU210170B0201 Index1. Introduction ..22. Main Definitions ..33. ABB Low Voltage Circuit Breakers complying with the Standards UL 489 and UL 1066 Common terms on Low Voltage Circuit Breakers ..7 ABB Low Voltage Circuit Breakers ..8 Molded-Case Circuit Breakers (Tmax) ..8 Low Voltage Power Circuit Breakers (Emax) ..104. Thermal Magnetic and Electronic trip Units for ABB Circuit Breakers Thermal Magnetic trip Units ..12 Overload Protection (L) ..12 Instantaneous Short Circuit Protection (I) ..12 Thermal magnetic trip Units for Tmax Circuit Breakers ..13 Time- current Curve of a Thermal magnetic trip Unit TMA ..14 Setting Examples of a trip Unit TMA.
28 - RATED CURRENT (In): the marked current rating and the maximum RMS current a circuit breaker can carry continuously without tripping and the maximum current the circuit breaker will carry without changing, deleting, or adding a part or parts such as trip units and rating plugs. See also cur-rent setting (Ir).
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