GE 745 TRANSFORMER MANAGEMENT RELAY User Manual

GE Power Management 745 Transformer Management Relay
ix
TABLE OF CONTENTS
10.6.17 UNDERFREQUENCY 1......................................................................... 10-35
a PRELIMINARIES ................................................................................... 10-35
b VOLTAGE INPUT FUNCTION (VOLTAGE INPUT ENABLED)............. 10-35
c CURRENT INPUT FUNCTION (VOLTAGE INPUT DISABLED)........... 10-36
10.6.18 UNDERFREQUENCY 2......................................................................... 10-37
10.6.19 OVERFREQUENCY .............................................................................. 10-37
a PRELIMINARIES ................................................................................... 10-37
b VOLTAGE INPUT FUNCTION (VOLTAGE INPUT ENABLED)............. 10-37
c CURRENT INPUT FUNCTION (VOLTAGE INPUT DISABLED)........... 10-38
10.6.20 FREQUENCY DECAY RATE 1 ............................................................. 10-39
a PRELIMINARIES ................................................................................... 10-39
b VOLTAGE INPUT FUNCTION (VOLTAGE INPUT ENABLED)............. 10-39
c CURRENT INPUT FUNCTION (VOLTAGE INPUT DISABLED)........... 10-40
d FREQUENCY DECAY RATE 2, 3, & 4.................................................. 10-40
10.6.21 VOLTS-PER-HZ 1(2) ............................................................................. 10-41
10.6.22 5TH HARMONIC SCHEME................................................................... 10-41
10.6.23 INSULATION AGING............................................................................. 10-42
a PRELIMINARIES ................................................................................... 10-42
b HOTTEST SPOT LIMIT......................................................................... 10-42
c AGING FACTOR LIMIT ......................................................................... 10-42
d LOSS-OF-LIFE LIMIT ............................................................................ 10-42
10.6.24 TAP MONITOR FAILURE...................................................................... 10-42
10.7 AUXILIARY PROTECTION/MONITORING FUNCTIONS
10.7.1 THD LEVEL SCHEME........................................................................... 10-43
a MINIMUM PICKUP ................................................................................ 10-43
b OPERATING TIME................................................................................ 10-43
c MINIMUM OPERATING CURRENT...................................................... 10-43
d OTHER THD ELEMENTS...................................................................... 10-43
10.7.2 HARMONIC DERATING FUNCTION .................................................... 10-44
a OPERATING LEVEL.............................................................................. 10-44
b OPERATING TIME................................................................................ 10-44
10.7.3 TRANSFORMER OVERLOAD .............................................................. 10-45
a OPERATING LEVEL.............................................................................. 10-45
b OPERATING TIME................................................................................ 10-45
10.8 PLACING RELAY INTO SERVICE
10.8.1 DESCRIPTION ...................................................................................... 10-46
11. SETPOINT TABLES
11.1 COMMISSIONING SUMMARY
11.1.1 S1 745 SETUP......................................................................................... 11-1
11.1.2 S2 SYSTEM SETUP................................................................................ 11-2
11.1.3 FLEXCURVES......................................................................................... 11-4
11.1.4 S3 LOGIC INPUTS .................................................................................. 11-5
11.1.5 S4 ELEMENTS........................................................................................ 11-6
11.1.6 S5 OUTPUTS ........................................................................................ 11-18
A. FIGURES AND TABLES
A.1 FIGURES AND TABLES
A.1.1 LIST OF FIGURES ....................................................................................A-1
A.1.2 LIST OF TABLES.......................................................................................A-2
B. EU DECLARATION OF
CONFORMITY
B.1 EU DECLARATION OF CONFORMITY

GE 745 TRANSFORMER MANAGEMENT RELAY Specifications

General

Brand	GE
Model	745 TRANSFORMER MANAGEMENT RELAY
Category	Relays
Language	English