GE Multilin 750/760 Feeder Management Relay vii
INDEX
inputs .................................................................................... 2-6
measured parameters............................................................. 2-7
monitoring elements ............................................................... 2-9
outputs ................................................................................ 2-11
physical ............................................................................... 2-12
protection elements ................................................................ 2-7
technical ................................................................................ 2-6
SR750/760PC
entering setpoints................................................................. 4-13
installing ................................................................................ 4-8
requirements .......................................................................... 4-7
saving setpoints ................................................................... 4-11
upgrading .............................................................................. 4-8
Windows 3.1 considerations ................................................... 4-7
STABILIZING RESISTOR
calculating values................................................................. 5-57
restricted earth fault ............................................................. 5-55
STATUS INDICATORS ........................................................... 4-2
SUMMARY OF FEATURES .................................................... 2-1
SUPERVISION
close coil ............................................................................. 3-12
trip coil ................................................................................ 3-12
SYNCHROCHECK
control scheme..................................................................... 8-40
logic diagram ..................................................................... 5-100
setpoints .............................................................................. 5-99
SYNCHRONIZING VOLTAGE ............................................... 6-11
SYSTEM FREQUENCY ........................................................ 5-17
T
TECHNICAL SPECIFICATIONS ............................................. 2-6
TECHNICAL SUPPORT ACTUAL VALUES .......................... 6-19
TERMINAL ASSIGNMENTS ................................................... 3-6
TERMINAL LAYOUT ............................................................... 3-5
TEST EQUIPMENT ................................................................. 8-2
TESTING
analog outputs ................................................................... 5-130
breaker failure...................................................................... 8-31
bus undervoltage ................................................................. 8-25
requirements .......................................................................... 8-1
safety precautions .................................................................. 8-1
setup ..................................................................................... 8-3
simulation .......................................................................... 5-131
specifications ....................................................................... 2-12
test equipment ....................................................................... 8-2
wiring diagrams...................................................................... 8-3
TEXT SETPOINTS .................................................................. 1-4
THEORY OF OPERATION...................................................... 2-3
THERMAL DEMAND CHARACTERISTIC ............................. 5-78
THRESHOLD, ANALOG........................................................ 5-84
TIME OVERCURRENT CURVES
see TOC CURVES and individual TOC curves indexed
alphabetically
TOC CURVES
ANSI.................................................................................... 5-33
characteristics...................................................................... 5-32
definite time ......................................................................... 5-32
IAC ...................................................................................... 5-35
IEC ...................................................................................... 5-34
TRACE MEMORY
circular buffer....................................................................... 7-10
reading ................................................................................ 7-10
setpoints .............................................................................. 5-11
TRANSFER FUNCTIONS SETPOINTS ................................ 5-25
TRANSFER SCHEME
associated elements........................................................... 5-109
bus tie breaker DC schematic ............................................. 5-114
bus tie breaker logic ........................................................... 5-117
description ........................................................................... 8-47
incomer 1 DC schematic ..................................................... 5-112
incomer 1 logic diagram ..................................................... 5-115
incomer 2 DC schematic ..................................................... 5-113
incomer 2 logic diagram ..................................................... 5-116
one line diagram ................................................................ 5-111
setpoints ............................................................................ 5-107
TRANSFORMER POLARITY .................................................. 3-8
TRANSIENTS.......................................................................... 2-3
TRIP COIL MONITORING..................................................... 8-37
TRIP COIL SUPERVISION
connection diagram .............................................................. 3-13
description ........................................................................... 3-12
TRIP COUNTER
actual values ........................................................................ 6-15
logic diagram ....................................................................... 5-90
setpoints .............................................................................. 5-89
TRIP DATA
last trip data ........................................................................... 6-6
TRIP TIMES USER TABLE ................................................... 5-18
TYPICAL WIRING
description ............................................................................. 3-5
diagram ................................................................................. 3-7
U
UNDERFREQUENCY
logic diagram ....................................................................... 5-69
protection scheme ................................................................ 8-29
restoration ......................................................................... 5-106
setpoints .............................................................................. 5-68
UNDERFREQUENCY RESTORATION
control scheme..................................................................... 8-46
logic diagram ..................................................................... 5-107
setpoints ............................................................................ 5-106
UNDERVOLTAGE
inverse time curves .............................................................. 5-63
inverse time delay characteristics ......................................... 5-63
line ...................................................................................... 5-65
protection elements .............................................................. 5-63
restoration ......................................................................... 5-105
UNDERVOLTAGE INVERSE TIME DELAY .......................... 5-63
UNDERVOLTAGE RESTORATION
control scheme..................................................................... 8-44
logic diagram ..................................................................... 5-105
setpoints ............................................................................ 5-105
UNPACKING THE RELAY ...................................................... 1-1
UPGRADING PC SOFTWARE ................................................ 4-9
USER INPUT FUNCTIONS SETPOINTS .............................. 5-22
USER MAP
accessing data ..................................................................... 7-11
description ........................................................................... 4-17
register addresses................................................................ 7-12
values window...................................................................... 4-17
USER TEXT MESSAGES
adding ................................................................................. 5-14
setpoints .............................................................................. 5-14
V
VARHOURS MEASUREMENT .............................................. 8-12
VIRTUAL INPUTS
actual values .......................................................................... 6-5
testing ................................................................................... 8-8
tests ...................................................................................... 8-4
VOLTAGE
actual values ........................................................................ 6-10
negative sequence ............................................................... 5-62
synchronizing ....................................................................... 6-11
VOLTAGE TRANSFORMER
AC inputs ............................................................................. 3-11
bus VT sensing ........................................................... 5-16
, 5-17
failure ......................................................................... 5-94
, 8-36
line connections ................................................................... 3-11
setting example ...................................................................... 1-6
VT FAILURE
logic diagram ....................................................................... 5-94
monitoring ............................................................................ 8-36
setpoints .............................................................................. 5-94
VTs
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