GE 745 - Page 5

745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL TOC–III
PHASE SHIFTS ON THREE-PHASE TRANSFORMERS ......................................................... 5-8
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HASE ANGLE CORRECTION .............................................................................................. 5-10
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ERO-SEQUENCE COMPONENT REMOVAL ....................................................................... 5-11
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RANSFORMER TYPES ......................................................................................................... 5-13
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HASE SHIFTS ...................................................................................................................... 5-24
S1 745 SETUP .................................................................................................................................... 5-25
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ASSCODE ............................................................................................................................ 5-25
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REFERENCES ....................................................................................................................... 5-25
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OMMUNICATIONS .............................................................................................................. 5-26
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ESETTING ............................................................................................................................ 5-29
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LOCK ................................................................................................................................... 5-29
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EFAULT MESSAGES ........................................................................................................... 5-30
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CRATCHPAD ........................................................................................................................ 5-31
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NSTALLATION ....................................................................................................................... 5-31
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PGRADE OPTIONS ............................................................................................................. 5-31
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ETUP EVENT RECORDER ................................................................................................... 5-33
S2 SYSTEM SETUP ............................................................................................................................ 5-34
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ESCRIPTION ........................................................................................................................ 5-34
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RANSFORMER ..................................................................................................................... 5-34
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INDINGS 1 TO 3 ............................................................................................................... 5-36
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NLOAD TAP CHANGER ..................................................................................................... 5-37
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ARMONICS ......................................................................................................................... 5-38
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LEXCURVES™ .................................................................................................................... 5-38
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OLTAGE INPUT ................................................................................................................... 5-39
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MBIENT TEMPERATURE ..................................................................................................... 5-39
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NALOG INPUT .................................................................................................................... 5-41
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EMAND METERING ............................................................................................................ 5-41
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NALOG OUTPUTS 1 TO 7 ................................................................................................. 5-43
S3 LOGIC INPUTS ............................................................................................................................. 5-44
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ESCRIPTION ........................................................................................................................ 5-44
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OGIC INPUTS 1 TO 16 ...................................................................................................... 5-44
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IRTUAL INPUTS 1 TO 16 .................................................................................................. 5-45
S4 ELEMENTS ..................................................................................................................................... 5-46
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NTRODUCTION TO ELEMENTS ........................................................................................... 5-46
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ETPOINT GROUP ................................................................................................................ 5-47
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IFFERENTIAL ELEMENT ..................................................................................................... 5-48
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NSTANTANEOUS DIFFERENTIAL ........................................................................................ 5-57
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HASE OVERCURRENT ........................................................................................................ 5-58
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EUTRAL OVERCURRENT .................................................................................................... 5-66
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ROUND OVERCURRENT .................................................................................................... 5-69
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ESTRICTED GROUND FAULT ............................................................................................. 5-72
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EGATIVE SEQUENCE OVERCURRENT .............................................................................. 5-76
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REQUENCY .......................................................................................................................... 5-78
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VEREXCITATION ................................................................................................................. 5-83
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ARMONICS ......................................................................................................................... 5-88
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NSULATION AGING ............................................................................................................. 5-90
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NALOG INPUT LEVEL ......................................................................................................... 5-94
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URRENT DEMAND ............................................................................................................. 5-95
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RANSFORMER OVERLOAD ................................................................................................. 5-96
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AP CHANGER FAILURE ...................................................................................................... 5-97
S5 OUTPUTS ....................................................................................................................................... 5-99
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ESCRIPTION ........................................................................................................................ 5-99
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ELAY ASSIGNMENTS .......................................................................................................... 5-99
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NTRODUCTION TO FLEXLOGIC™ ...................................................................................... 5-99