GE F60 UR Series, Инструкция по эксплуатации, Страница: 324 / 558

5-198 F60 Feeder Protection System GE Multilin
5.6 CONTROL ELEMENTS 5 SETTINGS
5
Figure 5–103: BREAKER RESTRIKE SCHEME LOGIC
f) INCIPIENT FAULT DETECTOR
PATH: SETTINGS
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CONTROL ELEMENTS
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MONITORING ELEMENTS
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INCIPIENT FAULT 1(2)
There are two incipient cable fault detection elements 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.
„
INCIPIENT FAULT 1
„
INCIPIENT FAULT 1
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
INCIPNT FLT 1 BLOCK:
Off
Range: FlexLogic™ operand
MESSAGE
INCIPIENT FAULT 1
SOURCE: SRC 1
Range: SRC 1, SRC 2
MESSAGE
INCIPIENT FAULT 1
PICKUP: 0.50 pu
Range: 0.10 to 10.00 pu in steps of 0.01
MESSAGE
INCIPNT FLT 1 MODE:
Number of counts
Range: Number of counts, Counts per window
MESSAGE
INCIPIENT FLT 1 TRIP
COUNTS NUMBER: 2
Range: 1 to 10 in steps of 1
MESSAGE
INCIPNT FLT 1 DETECT
WINDOW: 10.00 s
Range: 0.00 to 1000.00 s in steps of 0.01
MESSAGE
INCIPIENT FAULT 1
RESET DELAY: 0.100 s
Range: 0.000 to 65.535 s in steps of 0.001
MESSAGE
INCIPIENT FAULT 1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
INCIPIENT FAULT 1
EVENTS: Disabled
Range: Disabled, Enabled
RUN
Current interruption
detection logic
< 0.05 pu
for > ¼ cycle
I
t
mag
ARMED
RESET
SETTING
= Enabled
BREAKER RESTRIKE 1
FUNCTION
SETTING
= Off
BKR RSTR 1 BLK
AND
SETTING
= IA
BREAKER RESTRIKE 1
SOURCE
= IB
= IC
SETTING
= Off
BKR RSTR 1 BKR OPEN
SETTING
= Off
BKR RSTR 1 OPEN CMD
SETTING
= Off
BKR RSTR 1 CLS CMD
AND
OR
SETTING
BREAKER RESTRIKE 1 PICKUP
RUN
Restrike detection logic
0
T
RST
SETTING
BREAKER RESTRIKE 1
RESET DELAY
0
T
RST
0
T
RST
FLEXLOGIC OPERANDS
BKR RESTRIKE 1 OP A
BKR RESTRIKE 1 OP B
BKR RESTRIKE 1 OP C
BKR RESTRIKE 1 OP
FLEXLOGIC OPERAND
OR
834012A1.CDR