5-16
B90 Low Impedance Bus Differential System
GE Multilin
5.2 PRODUCT SETUP
5 SETTINGS
5
components. The cut-off operation applies to quantities used for metering, protection, and control, as well as those
used by communications protocols. Raw samples of the voltages available via oscillography are not subject 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.
5.2.5 CLEAR RELAY RECORDS
PATH: SETTINGS
PRODUCT SETUP
CLEAR RELAY RECORDS
Selected records can be cleared from user-programmable conditions with FlexLogic operands. Assigning user-programma-
ble pushbuttons to clear specific records are typical applications for these commands. Since the B90 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
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”
CLEAR RELAY
RECORDS
CLEAR USER REPORTS:
Off
Range: FlexLogic operand
MESSAGE
CLEAR EVENT RECORDS:
Off
Range: FlexLogic operand
MESSAGE
CLEAR OSCILLOGRAPHY?
No
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.
NOTE
Содержание B90 UR Series
Страница 28: ...1 20 B90 Low Impedance Bus Differential System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Страница 114: ...4 28 B90 Low Impedance Bus Differential System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 272: ...6 14 B90 Low Impedance Bus Differential System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Страница 316: ...A 4 B90 Low Impedance Bus Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 406: ...B 90 B90 Low Impedance Bus Differential System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Страница 436: ...C 30 B90 Low Impedance Bus Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 446: ...D 10 B90 Low Impedance Bus Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...