GE 745 TRANSFORMER MANAGEMENT RELAY User Manual

GE Power Management 745 Transformer Management Relay
iii
TABLE OF CONTENTS
5.2.7 TRANSFORMER TYPES TABLE............................................................ 5-10
5.2.8 TABLE OF PHASE SHIFTS..................................................................... 5-23
5.3 S1 745 SETUP
5.3.1 DESCRIPTION ........................................................................................ 5-24
5.3.2 PASSCODE............................................................................................. 5-24
5.3.3 PREFERENCES...................................................................................... 5-25
5.3.4 COMMUNICATIONS ............................................................................... 5-26
5.3.5 DNP COMMUNICATIONS....................................................................... 5-27
5.3.6 RESETTING ............................................................................................ 5-28
5.3.7 CLOCK..................................................................................................... 5-28
5.3.8 DEFAULT MESSAGES ........................................................................... 5-29
a ADDING DEFAULT MESSAGES ............................................................ 5-29
b REMOVING DEFAULT MESSAGES....................................................... 5-29
5.3.9 SCRATCHPAD........................................................................................ 5-30
5.3.10 INSTALLATION ....................................................................................... 5-30
5.3.11 745 OPTIONS.......................................................................................... 5-31
5.3.12 UPGRADE OPTIONS.............................................................................. 5-32
5.4 S2 SYSTEM SETUP
5.4.1 DESCRIPTION ........................................................................................ 5-33
5.4.2 TRANSFORMER ..................................................................................... 5-33
5.4.3 WINDING 1 (2/3)...................................................................................... 5-35
5.4.4 ONLOAD TAP CHANGER....................................................................... 5-36
5.4.5 HARMONICS........................................................................................... 5-37
5.4.6 FLEXCURVES......................................................................................... 5-37
5.4.7 VOLTAGE INPUT .................................................................................... 5-38
5.4.8 AMBIENT TEMPERATURE..................................................................... 5-39
5.4.9 ANALOG INPUT...................................................................................... 5-40
5.4.10 DEMAND METERING ............................................................................. 5-41
5.4.11 ANALOG OUTPUTS................................................................................ 5-42
5.5 SETPOINTS S3 LOGIC INPUTS
5.5.1 DESCRIPTION ........................................................................................ 5-43
5.5.2 LOGIC INPUTS........................................................................................ 5-43
5.5.3 VIRTUAL INPUTS.................................................................................... 5-44
5.6 S4 ELEMENTS
5.6.1 DESCRIPTION ........................................................................................ 5-45
5.6.2 INTRODUCTION TO ELEMENTS........................................................... 5-45
5.6.3 SETPOINT GROUP................................................................................. 5-46
5.6.4 DIFFERENTIAL ....................................................................................... 5-46
a PERCENT DIFFERENTIAL ..................................................................... 5-46
b HARMONIC INHIBIT................................................................................ 5-49
c ENERGIZATION INHIBIT ........................................................................ 5-49
d ENERGIZATION SENSING..................................................................... 5-50
e 5TH HARMONIC INHIBIT........................................................................ 5-51
5.6.5 INSTANTANEOUS DIFFERENTIAL........................................................ 5-52
5.6.6 PHASE OVERCURRENT........................................................................ 5-52
a WINDING 1 (2/3) PHASE TIME OVERCURRENT.................................. 5-52
b WINDING 1 (2/3) PHASE INSTANTANEOUS OVERCURRENT 1......... 5-54
c WINDING 1 (2/3) PHASE INSTANTANEOUS OVERCURRENT 2 ........ 5-54
5.6.7 NEUTRAL OVERCURRENT ................................................................... 5-55
a WINDING 1 (2/3) NEUTRAL TIME OVERCURRENT ............................. 5-55
b WINDING 1 (2/3) NEUTRAL INSTANTANEOUS OVERCURRENT 1 .... 5-56
c WINDING 1 (2/3) NEUTRAL INSTANTANEOUS OVERCURRENT 2 .... 5-56
5.6.8 GROUND OVERCURRENT .................................................................... 5-57
a WINDING 1 (2/3) GROUND TIME OVERCURRENT .............................. 5-57
b WINDING 1 (2/3) GROUND INSTANTANEOUS OVERCURRENT 1 ..... 5-58
c WINDING 1 (2/3) GROUND INSTANTANEOUS OVERCURRENT 2 ..... 5-58
5.6.9 RESTRICTED GROUND (DIFFERENTIAL GROUND)........................... 5-59
a WINDING 1 (2/3) RESTRICTED GROUND FAULT ................................ 5-59

GE 745 TRANSFORMER MANAGEMENT RELAY Specifications

General

Brand	GE
Model	745 TRANSFORMER MANAGEMENT RELAY
Category	Relays
Language	English