GE UR Series Instruction Manual page 230

5.6 CONTROL ELEMENTS
CT FAIL 3I0 INPUT 2:
This setting is used to select the source for the current for input 2. Input 2 should use different set of CTs or different CT
core of the same CT. Against absence at input 2 CT source (if exists), 3I_0 current logic is built.
CT FAIL 3I0 INPUT 2 PICKUP:
This setting is used to select the pickup value for 3I_0 for the input 2 (different CT input) of the relay.
CT FAIL 3V0 INPUT:
This setting is used to select the source for the voltage.
CT FAIL 3V0 INPUT PICKUP:
This setting is used to select the pickup value for 3V_0 source.
CT FAIL PICKUP DELAY:
This setting is used to select the pickup delay of the element.
SETTING
CT FAIL FUNCTION:
Disabled=0
Enabled=1
SETTING
CT FAIL BLOCK:
Off=0
5
SETTING
CT FAIL 3IO INPUT1:
SRC1
SETTING
CT FAIL 3IO INPUT2:
SRC2
SETTING
CT FAIL 3VO INPUT:
SRC1
5-146
SETTING
CT FAIL 3IO INPUT1 PKP:
RUN 3IO > PICKUP
SETTING
CT FAIL 3IO INPUT2 PKP:
RUN 3IO > PICKUP
SETTING
OR
CT FAIL 3VO INPUT:
RUN 3VO > PICKUP
Figure 5–76: CT FAILURE DETECTOR SCHEME LOGIC
L90 Line Differential Relay
SETTING
CT FAIL PICKUP DELAY:
FLEXLOGIC OPERANDS
AND
0
5 SETTINGS
CT FAIL OP
CT FAIL PKP
827048A6.CDR
GE Power Management