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CHAPTER 5: SETTINGS
PRODUCT SETUP
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
5-27
5
The power cut-off is therefore:
power cut-off= (
CURRENT CUT-OFF LEVEL
×
V
OLTAGE 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 does not display. As well, the three-phase energy data do not accumulate if
the total power from all three phases does not exceed the power cut-off.
5.3.3 Clear relay records
SETTINGS
PRODUCT SETUP
CLEAR RELAY RECORDS
Selected records can be cleared from user-programmable conditions with FlexLogic operands. Assigning user-
programmable pushbuttons to clear specific records is a typical application 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-
programmable pushbuttons are protected by the command password. Thus, if they are used to clear records, the user-
programmable pushbuttons can provide extra security if required.
For example, to assign user-programmable pushbutton 1 to clear demand records, apply the following settings.
1.
Assign the clear demand function to pushbutton 1 by making the following change in the
SETTINGS
PRODUCT SETUP
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
PRODUCT
SETUP
USER-PROGRAMMABLE PUSHBUTTONS
USER PUSHBUTTON 1
menu:
PUSHBUTTON 1 FUNCTION
: “Self-reset”
PUSHBTN 1 DROP-OUT TIME
: “0.20 s”
NOTE
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.
CLEAR RELAY
RECORDS
CLEAR FAULT REPORTS:
Off
Range: FlexLogic operand
CLEAR EVENT RECORDS:
Off
Range: FlexLogic operand
CLEAR OSCILLOGRAPHY:
No
Range: FlexLogic operand
CLEAR DATA LOGGER:
Off
Range: FlexLogic operand
CLEAR ARC AMPS 1:
Off
Range: FlexLogic operand
CLEAR ARC AMPS 2:
Off
Range: FlexLogic operand
RESET UNAUTH ACCESS:
Off
Range: FlexLogic operand
CLEAR DIR I/O STATS:
Off
Range: FlexLogic operand
Visible only for units with Direct I/O module
3
Содержание L60
Страница 130: ...4 30 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL LOGIC DIAGRAMS CHAPTER 4 INTERFACES 4 ...
Страница 464: ...5 334 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 5 SETTINGS 5 ...
Страница 498: ...7 10 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TARGETS MENU CHAPTER 7 COMMANDS AND TARGETS 7 ...
Страница 570: ...10 14 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL DISPOSAL CHAPTER 10 MAINTENANCE 10 ...
Страница 582: ...A 12 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL FLEXANALOG ITEMS APPENDIX A FLEXANALOG OPERANDS A ...
Страница 588: ...C 4 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL REVISION HISTORY APPENDIX C MISCELLANEOUS C ...
Страница 592: ...iv L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL ABBREVIATIONS ...