6-14
Reporting and Alarm Functions
BE1-951
Protective
element
picks up
Protective
element
trips
Breaker auxiliary
contact changes
state
Protective
element
drops out
Fast
dropout
current
detector
drops out
(When SG-TRIGGER (PU or Logic) is TRUE)
A
B
C
D
4 cycle
pre-trigger
Post-trigger recording
(Default: 15 cycle record, 3 cycle pre-trigger, 12 cycle post-trigger)
Post-trigger
1/4 to 5 cycles
of pre-trigger
E
G
(When SG-TRIGGER (PU) is TRUE)
H
I
J
D2559-23.vsd
02-28-01
(SB-LOGIC setting)
When
SG-TRIGGER
(PU or Logic)
goes FALSE
(When SG-TRIGGER (PU or Logic) is TRUE)
(When SG-TRIGGER (PU or Logic) is TRUE)
(When SG-TRIGGER (PU) is TRUE)
(When SG-TRIGGER (Trip) is TRUE)
F
3 cycle pre-
fault data cap-
ture trigger
2 cycle post
trip data cap-
ture trigger
2 cycles prior
to dropout, PU
only events
SG-TRIGGER
-Pickup
-Logic
PU + logic
Fast dropout
current
detector
Breaker
status
Fault summary
report triggered
Targets logged
Fault clearing
time calculated
Breaker
operate time
Oscillographic
Record
Fault
currents
recorded
Red TRIP LED
flashing
Red TRIP LED
solid
Breaker interruption
duty
Setting group
change blocked
-Trip
Figure 6-1. Protective Fault Analysis