5-126
B90 Low Impedance Bus Differential System
GE Multilin
5.6 CONTROL ELEMENTS
5 SETTINGS
5
•
ISOLATOR 1 RESET:
This setting indicates a FlexLogic™ operand that acknowledges the isolator alarm. Once the
alarm is acknowledged, the
ISOLATOR 1 ALARM
is reset. If the latter operand was configured to block protection, the
blocking is removed once the alarm is acknowledged. The acknowledge pulse must last at least 50 ms to take effect.
Figure 5–61: ISOLATOR MONITORING SCHEME LOGIC
Figure 5–62: ISOLATOR MONITORING SAMPLE TIMING DIAGRAM
SETTING
ISOLATOR 1
FUNCTION:
Disabled = 0
Enabled = 1
SETTINGS
ISOLATOR 1 OPEN:
Off = 0
FLEXLOGIC OPERAND
ISOLATOR 1 BLOCK
SETTING
ISOLATOR 1 ALARM
DELAY:
t
PKP
0
SETTING
B90 FUNCTION:
Logic = 0
Protection = 1
AN
D
ISOLATOR 1 CLOSED:
Off = 0
SETTING
ISOLATOR 1 RESET:
Off = 0
Isolator
Position
Logic
XOR
FLEXLOGIC OPERAND
ISOLATOR 1 POSITION
Positive
Edge
Detector
S
R
FLEXLOGIC OPERAND
ISOLATOR 1 ALARM
AN
D
RUN
OR
836002A1.vsd
ISOLATOR 1 OPEN
ISOLATOR 1 CLOSED
ISOLATOR 1 BLOCK
ISOLATOR 1 ALARM
ISOLATOR 1 RESET
ISOLATOR 1 POSITION
Isolator position valid
(isolator opened)
Isolator position valid
(isolator opened)
Isolator position invalid
alarm time
delay
blocking signal resets when
isolator position valid
alarm
acknowledged
alarm acknowledging
signal
836744A1.vsd
Summary of Contents for B90 UR Series
Page 316: ...A 4 B90 Low Impedance Bus Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 406: ...B 90 B90 Low Impedance Bus Differential System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Page 436: ...C 30 B90 Low Impedance Bus Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Page 446: ...D 10 B90 Low Impedance Bus Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...