ABB RELION Series Technical Manual

Also see for Relion REC615: Installation manual Engineering manual Engineering guide Communication protocol manual Manual

Contents

ABB RELION Series Technical Manual Manual pdf 467 page image

Section 5 Protection related functions5.1 Three-phase inrush detector INRPHAR5.1.1 IdentificationFunction description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberThree-phase inrush detector INRPHAR 3I2f> 685.1.2 Function blockA070377 V1 ENFigure 234: Function block5.1.3 FunctionalityThe three-phase inrush detector function INRPHAR is used to coordinate transformerinrush situations in distribution networks.Transformer inrush detection is based on the following principle: the output signalBLK2H is activated once the numerically derived ratio of second harmonic currentI_2H and the fundamental frequency current I_1H exceeds the set value.The operate time characteristic for the function is of definite time (DT) type.The function contains a blocking functionality. Blocking deactivates all outputs andresets timers.5.1.4 Operation principleThe function can be enabled and disabled with the Operation setting. Thecorresponding parameter values are "On" and "Off".1MRS758755 A Section 5Protection related functionsREC615 and RER615 461Technical Manual