GE Multilin 745 User Manual

Table of Contents
745
Generator Management Relay
http://www.GEindustrial.com/multilin
v
GE Multilin
Setpoint Entry ..................................................................................................................................... 5-4
Setpoint Write Access ........................................................................................................................ 5-4
Auto-Configuration
Introduction ......................................................................................................................................... 5-5
Dynamic CT Ratio Mismatch Correction........................................................................................... 5-5
Phase Shifts on Three-Phase Transformers ..................................................................................... 5-7
Phase Angle Correction...................................................................................................................... 5-9
Zero-Sequence Component Removal ............................................................................................. 5-10
Transformer Types ........................................................................................................................... 5-11
Phase Shifts....................................................................................................................................... 5-23
S1 745 Setup
Passcode............................................................................................................................................ 5-24
Preferences........................................................................................................................................ 5-24
Communications............................................................................................................................... 5-25
Resetting............................................................................................................................................ 5-27
Clock................................................................................................................................................... 5-27
Default Messages.............................................................................................................................. 5-27
Scratchpad......................................................................................................................................... 5-28
Installation ......................................................................................................................................... 5-29
Upgrade Options............................................................................................................................... 5-29
S2 System Setup
Description ........................................................................................................................................ 5-30
Transformer....................................................................................................................................... 5-30
Windings 1 to 3 ................................................................................................................................. 5-32
Onload Tap Changer......................................................................................................................... 5-33
Harmonics ......................................................................................................................................... 5-33
FlexCurves™ ..................................................................................................................................... 5-34
Voltage Input..................................................................................................................................... 5-34
Ambient Temperature ...................................................................................................................... 5-35
Analog Input...................................................................................................................................... 5-36
Demand Metering ............................................................................................................................. 5-36
Analog Outputs 1 to 7....................................................................................................................... 5-37
S3 Logic Inputs
Description ........................................................................................................................................ 5-38
Logic Inputs 1 to 16........................................................................................................................... 5-38
Virtual Inputs 1 to 16......................................................................................................................... 5-39
S4 Elements
Introduction to Elements .................................................................................................................. 5-39
Setpoint Group.................................................................................................................................. 5-41
Differential Element .......................................................................................................................... 5-41
Instantaneous Differential ................................................................................................................ 5-48
Phase Overcurrent ............................................................................................................................ 5-49
Neutral Overcurrent.......................................................................................................................... 5-56
Ground Overcurrent ......................................................................................................................... 5-59
Restricted Ground............................................................................................................................. 5-61
Negative Sequence Overcurrent ..................................................................................................... 5-64
Frequency.......................................................................................................................................... 5-66
Overexcitation ................................................................................................................................... 5-71
Harmonics ......................................................................................................................................... 5-75
Insulation Aging ................................................................................................................................ 5-78
Analog Input Level............................................................................................................................ 5-82
Current Demand................................................................................................................................ 5-83
Transformer Overload ...................................................................................................................... 5-84
Tap Changer Failure ......................................................................................................................... 5-85
S5 Outputs
Description ........................................................................................................................................ 5-86
Introduction to FlexLogic™.............................................................................................................. 5-86
FlexLogic™ Rules.............................................................................................................................. 5-87
Output Relays.................................................................................................................................... 5-88
Trace Memory................................................................................................................................... 5-90
Virtual Outputs .................................................................................................................................. 5-91
Timers................................................................................................................................................ 5-91

GE Multilin 745 Specifications

General

Brand	GE
Model	Multilin 745
Category	Relays
Language	English