Table of Contents
Advertisement
5.6 CONTROL ELEMENTS
5
c) ISOLATOR MONITORING
PATH: SETTINGS
CONTROL ELEMENTS
ISOLATOR 1
Bus protection zone discrimination depends heavily on reliable isolator position feedback. Therefore, two isolator auxiliary
contacts – normally open and normally closed – must confirm the status of the isolator via the B90 contact inputs.
5-124
SETTING
B90 FUNCTION:
Logic = 0
Protection = 1
SETTING
AND
CT TROUBLE ZONE 1
FUNCTION:
Disabled = 0
Enabled = 1
SETTING
BUS 1A CT:
Current Phasor
SETTINGS
BUS 1A STATUS:
Off = 0
BUS 1A DIRECTION:
SETTINGS
CT TROUBLE ZONE 1
. . .
PICKUP:
RUN
SETTING
BUS 1X CT:
Current Phasor
SETTINGS
BUS 1X STATUS:
Off = 0
BUS 1X DIRECTION:
Figure 5–59: CT TROUBLE SCHEME LOGIC
MONITORING ELEMENTS
ISOLATOR 1
FUNCTION: Disabled
ISOLATOR 1 OPEN:
MESSAGE
Off
ISOLATOR 1 CLOSED:
MESSAGE
Off
ISOLATOR 1 ALARM
MESSAGE
DELAY: 0.05 s
ISOLATOR 1 RESET:
MESSAGE
Off
ISOLATOR 1
MESSAGE
TARGET: Self-Reset
ISOLATOR 1
MESSAGE
EVENTS: Disabled
B90 Low Impedance Bus Differential System
SETTINGS
CT TROUBLE ZONE 1
PICKUP:
FLEXLOGIC OPERAND
t
Id1 > PICKUP
CT TROUBLE1 OP
PKP
0
BUS REPLICA
Range: Disabled, Enabled
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range:
0.00 to 12.00 s in steps of 0.05
Range: FlexLogic™ operand
Range:
Self-Reset, Latched, Disabled
Range: Disabled, Enabled
5 SETTINGS
836759A3.CDR
ISOLATOR 1(48)
GE Multilin
Advertisement
Table of Contents
