GE 745 TRANSFORMER MANAGEMENT RELAY Instruction Manual page 6

6. ACTUAL VALUES
iv
TABLE OF CONTENTS
b RESTRICTED GROUND FAULT SETTINGS EXAMPLE........................ 5-61
c SETPOINTS............................................................................................. 5-62
5.6.10 NEGATIVE SEQUENCE OVERCURRENT ............................................. 5-63
a WINDING 1 (2/3) NEGATIVE SEQUENCE TIME OVERCURRENT ....... 5-63
b WINDING 1 (2/3) NEG. SEQ. INSTANTANEOUS OVERCURRENT ...... 5-64
5.6.11 FREQUENCY .......................................................................................... 5-65
a UNDERFREQUENCY 1 (2) ..................................................................... 5-65
b FREQUENCY DECAY ............................................................................. 5-66
c OVERFREQUENCY ................................................................................ 5-67
5.6.12 OVEREXCITATION ................................................................................. 5-68
a 5TH HARMONIC LEVEL ......................................................................... 5-68
b VOLTS-PER-HERTZ 1 (2) ....................................................................... 5-69
5.6.13 HARMONICS ........................................................................................... 5-70
a WINDING 1 (2/3) THD LEVEL ................................................................. 5-70
b WINDING 1 (2/3) HARMONIC DERATING ............................................. 5-71
5.6.14 INSULATION AGING / LOSS OF LIFE FEATURE .................................. 5-72
a DESCRIPTION ........................................................................................ 5-72
b HOTTEST-SPOT LIMIT ........................................................................... 5-72
c INSULATION AGING SETPOINTS ......................................................... 5-73
5.6.15 AGING FACTOR LIMIT ........................................................................... 5-74
5.6.16 LOSS OF LIFE LIMIT............................................................................... 5-75
5.6.17 ANALOG INPUT ...................................................................................... 5-76
a ANALOG LEVEL 1 (2) ............................................................................. 5-76
5.6.18 CURRENT DEMAND ............................................................................... 5-77
5.6.19 TRANSFORMER OVERLOAD ................................................................ 5-78
5.6.20 TAP CHANGER FAILURE ....................................................................... 5-79
5.7 S5 OUTPUTS
5.7.1 DESCRIPTION ........................................................................................ 5-80
5.7.2 INTRODUCTION TO FLEXLOGIC™....................................................... 5-80
5.7.3 FLEXLOGIC™ RULES ............................................................................ 5-82
5.7.4 OUTPUT RELAYS ................................................................................... 5-84
5.7.5 TRACE MEMORY.................................................................................... 5-85
5.7.6 VIRTUAL OUTPUTS................................................................................ 5-85
5.7.7 TIMERS ................................................................................................... 5-86
5.8 S6 TESTING
5.8.1 DESCRIPTION ........................................................................................ 5-87
5.8.2 OUTPUT RELAYS ................................................................................... 5-87
5.8.3 ANALOG OUTPUTS ................................................................................ 5-87
5.8.4 SIMULATION ........................................................................................... 5-88
5.8.5 PREFAULT VALUES ............................................................................... 5-89
5.8.6 FAULT VALUES ...................................................................................... 5-90
5.8.7 FACTORY SERVICE ............................................................................... 5-90
5.9 TIME OVERCURRENT CURVES
5.9.1 NOTE ....................................................................................................... 5-91
5.9.2 ANSI CURVES......................................................................................... 5-91
5.9.3 DEFINITE TIME CURVE ......................................................................... 5-93
5.9.4 IEC CURVES ........................................................................................... 5-93
5.9.5 IAC CURVES ........................................................................................... 5-95
5.10 INVERSE VOLTS-PER-HERTZ CURVES
5.10.1 INVERSE CURVE 1................................................................................. 5-97
5.10.2 INVERSE CURVE 2................................................................................. 5-98
5.10.3 INVERSE CURVE 3................................................................................. 5-99
6.1 OVERVIEW
6.1.1 DESCRIPTION .......................................................................................... 6-1
745 Transformer Management Relay
GE Power Management