GE UR F35 Series Instruction Manual page 302

5.7 CONTROL ELEMENTS
SETTING
BREAKER RESTRIKE 1
FUNCTION
= Enabled
SETTING
BKR RSTR 1 BLK
= Off
SETTING
BREAKER RESTRIKE 1
SOURCE
= IA
= IB
= IC
SETTING
BKR RSTR 1 BKR OPEN
= Off
SETTING
BKR RSTR 1 OPEN CMD
= Off
SETTING
BKR RSTR 1 CLS CMD
= Off
d) INCIPIENT FAULT DETECTOR

PATH: SETTINGS CONTROL ELEMENTS
5
 INCIPIENT FAULT 1

There are two incipient cable fault detection elements for each CT/VT module in the relay.
Before a permanent cable fault occurs, there are usually signs of degrading insulation manifesting itself as a short, mostly
half-cycle spikes asserting at the phase voltage peak. Due to shortness of such spikes, they are not usually detected by the
instantaneous protection of the feeder, which operates on the RMS or fundamental component of the phase current with a
relatively high pickup.
5-178
AND
RUN
ARMED
Current interruption
detection logic
I
< 0.05 pu
mag
t
for > ¼ cycle
OR
AND
Figure 5–85: BREAKER RESTRIKE SCHEME LOGIC

MONITORING ELEMENTS
INCIPIENT FAULT 1
FUNCTION: Disabled
INCIPNT FLT 1 BLOCK:
MESSAGE
Off
INCIPIENT FAULT 1
MESSAGE
SOURCE: SRC 1
INCIPIENT FAULT 1
MESSAGE
PICKUP: 0.50 pu
INCIPNT FLT 1 MODE:
MESSAGE
Number of counts
INCIPIENT FLT 1 TRIP
MESSAGE
COUNTS NUMBER: 2
INCIPNT FLT 1 DETECT
MESSAGE
WINDOW: 10.00 s
INCIPIENT FAULT 1
MESSAGE
RESET DELAY: 0.100 s
INCIPIENT FAULT 1
MESSAGE
TARGET: Self-reset
INCIPIENT FAULT 1
MESSAGE
EVENTS: Disabled
F35 Multiple Feeder Protection System
SETTING
SETTING
BREAKER RESTRIKE 1
BREAKER RESTRIKE 1 PICKUP
RESET DELAY
RUN
0
Restrike detection logic
0
0
RESET

INCIPIENT FAULT 1(6)
Range: Disabled, Enabled
Range: FlexLogic operand
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: 0.10 to 10.00 pu in steps of 0.01
Range: Number of counts, Counts per window
Range: 1 to 10 in steps of 1
Range: 0.00 to 1000.00 s in steps of 0.01
Range: 0.000 to 65.535 s in steps of 0.001
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
5 SETTINGS
T
RST
FLEXLOGIC OPERANDS
T
BKR RESTRIKE 1 OP A
RST
BKR RESTRIKE 1 OP B
BKR RESTRIKE 1 OP C
T
RST
FLEXLOGIC OPERAND
BKR RESTRIKE 1 OP
OR
834012A1.CDR
GE Multilin