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5-14
L60 Line Phase Comparison System
GE Multilin
5.2 PRODUCT SETUP
5 SETTINGS
5
CT primary = “100 A”, and
VT primary =
PHASE VT SECONDARY
x
PHASE VT RATIO
= 66.4 V x 208 = 13811.2 V
The power cut-off is therefore:
power cut-off = (
CURRENT CUT-OFF LEVEL
×
VOLTAGE CUT-OFF LEVEL
×
CT primary
×
VT primary)/VT secondary
= (
×
0.02 pu
×
1.0 V
×
100 A
×
13811.2 V) / 66.4 V
= 720.5 watts
Any calculated power value below this cut-off will not be displayed. As well, the three-phase energy data will not accumu-
late if the total power from all three phases does not exceed the power cut-off.
Lower the
VOLTAGE CUT-OFF LEVEL
and
CURRENT CUT-OFF LEVEL
with care as the relay accepts lower signals
as valid measurements. Unless dictated otherwise by a specific application, the default settings of “0.02
pu” for
CURRENT CUT-OFF LEVEL
and “1.0 V” for
VOLTAGE CUT-OFF LEVEL
are recommended.
5.2.3 CLEAR RELAY RECORDS
PATH: SETTINGS
Ö
PRODUCT SETUP
ÖØ
CLEAR RELAY RECORDS
Selected records can be cleared from user-programmable conditions with FlexLogic™ operands. Assigning user-program-
mable pushbuttons to clear specific records are typical applications for these commands. Since the L60 responds to rising
edges of the configured FlexLogic™ operands, they must be asserted for at least 50 ms to take effect.
Clearing records with user-programmable operands is not protected by the command password. However, user-program-
mable pushbuttons are protected by the command password. Thus, if they are used to clear records, the user-programma-
ble pushbuttons can provide extra security if required.
For example, to assign User-Programmable Pushbutton 1 to clear demand records, the following settings should be
applied.
1.
Assign the clear demand function to Pushbutton 1 by making the following change in the
SETTINGS
Ö
PRODUCT SETUP
ÖØ
CLEAR RELAY RECORDS
menu:
CLEAR DEMAND:
“
PUSHBUTTON 1 ON
”
2.
Set the properties for User-Programmable Pushbutton 1 by making the following changes in the
SETTINGS
Ö
PRODUCT
SETUP
ÖØ
USER-PROGRAMMABLE PUSHBUTTONS
Ö
USER PUSHBUTTON 1
menu:
PUSHBUTTON 1 FUNCTION:
“Self-reset”
PUSHBTN 1 DROP-OUT TIME:
“0.20 s”
CLEAR RELAY
RECORDS
CLEAR FAULT REPORTS:
Off
Range: FlexLogic™ operand
MESSAGE
CLEAR EVENT RECORDS:
Off
Range: FlexLogic™ operand
MESSAGE
CLEAR OSCILLOGRAPHY?
No
Range: FlexLogic™ operand
MESSAGE
CLEAR DATA LOGGER:
Off
Range: FlexLogic™ operand
MESSAGE
CLEAR ARC AMPS 1:
Off
Range: FlexLogic™ operand
MESSAGE
CLEAR ARC AMPS 2:
Off
Range: FlexLogic™ operand
MESSAGE
RESET UNAUTH ACCESS:
Off
Range: FlexLogic™ operand
MESSAGE
CLEAR DIR I/O STATS:
Off
Range: FlexLogic™ operand.
Valid only for units with Direct I/O module.
3
NOTE
Summary of Contents for UR series
Page 2: ......
Page 4: ......
Page 12: ...xii L60 Line Phase Comparison System GE Multilin TABLE OF CONTENTS ...
Page 32: ...1 20 L60 Line Phase Comparison System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 54: ...2 22 L60 Line Phase Comparison System GE Multilin 2 2 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Page 438: ...7 8 L60 Line Phase Comparison System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7 ...
Page 478: ...8 40 L60 Line Phase Comparison System GE Multilin 8 3 FAULT LOCATOR 8 THEORY OF OPERATION 8 ...
Page 502: ...A 10 L60 Line Phase Comparison System GE Multilin A 1 PARAMETER LIST APPENDIXA A ...
Page 584: ...B 82 L60 Line Phase Comparison System GE Multilin B 4 MEMORY MAPPING APPENDIXB B ...
Page 622: ...D 10 L60 Line Phase Comparison System GE Multilin D 1 PROTOCOL APPENDIXD D ...
Page 634: ...E 12 L60 Line Phase Comparison System GE Multilin E 2 DNP POINT LISTS APPENDIXE E ...
Page 642: ...F 8 L60 Line Phase Comparison System GE Multilin F 3 WARRANTY APPENDIXF F ...