GE UR F35 Series Instruction Manual page 329

5 SETTINGS
2.0
1.0
0
–0.5
0.62
2.0
1.0
0
–1.0
–2.0
0.62
Figure 5–89: ILLUSTRATION OF THE INCIPIENT FAULT DETECTOR ALGORITHM
The following settings are available for each incipient cable fault detector.
• INCIPIENT FAULT 1 FUNCTION: This setting enable and disables operation of the incipient fault detection element.
• INCIPNT FLT 1 BLOCK: This setting is used to block operation of the incipient cable fault detector element. Assertion
of the FlexLogic™ operand assigned to this setting block operation.
• INCIPIENT FAULT 1 SOURCE: This setting selects a current source for the incipient cable fault detector element. This
source must be assigned a valid CT bank.
• INCIPIENT FAULT 1 PICKUP: This setting specifies pickup level of the overcurrent detector in per-unit values of the
CT nominal current.
• INCIPNT FLT 1 MODE: There are two modes of operation available for the incipient cable fault detector element. In
the "Number of counts" mode, a trip will be initiated only after the selected number of faults is detected. In the "Counts
per window" mode, a trip will be initiated only after the selected number of faults is detected within the time specified by
the
INCIPNT FLT 1 DETECT WINDOW
• INCIPIENT FLT 1 TRIP COUNTS NUMBER: This setting selects the number of faults required to initiate a trip.
• INCIPNT FLT 1 DETECT WINDOW: This setting specifies a time window for "Counts per window" mode of operation.
• INCIPIENT FAULT 1 RESET DELAY: This setting specifies a reset time for the output after the trip is initiated.
GE Multilin
Incipient phase B fault
0.64 0.66 0.68
I
(neutral current)
N
0.64 0.66 0.68
setting.
F35 Multiple Feeder Protection System
5.7 CONTROL ELEMENTS
PHASE CURRENTS
0.70 0.72
CALCULATED NEUTRAL AND
SUPERIMPOSED PHASE B CURRENT
I
FB
0.7 0.72
Phase C
Phase A
Phase B
0.74
0.74
832774A1.CDR
5-201
5