Basler BE1-11m, Instruction Manual

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33-12 9424200996
Fault Reporting BE1-11 m
Table 33-3. Legend for Figure 33-8
Locator Description
A A fault summary report and an oscillograph record are triggered when the Pickup logic
expression becomes true.
B During the time that the Trip expression is true, targets are logged from each of the
protective functions that reach a trip state. If a protective function is not being used for
tripping purposes, the associated target function can be disabled through BESTCOMS Plus .
C Fault clearing time is calculated as the duration of the time that the Pickup logic expression
is true.
D Breaker operate time is calculated as the time from when the Trip logic expression becomes
true until the fast current detector senses that the breaker has successfully interrupted the
current in all poles of the breaker.
E A second oscillographic record is triggered to record the end of the fault if the Pickup logic
expression remains in the true state at the time that the first oscillographic record ends. This
second record will have from ¼ to five cycles of pre-trigger data depending upon when the
Pickup logic expression becomes false.
F Recorded fault current and voltage magnitudes are displayed on the Targets screen of the
front-panel display. The same information including phase voltage frequency, auxiliary
voltage frequency, and voltage and current angles are recorded in the fault summary report.
The magnitude and angle results are based on data captured two cycles after the trip output
goes true. This two-cycle delay allows the line transients to settle to provide data that is
more accurate. If the Trip expression does not become true, the fault was cleared by a
down-stream device. For these pickup-only events, fault current, voltage, and angle
recorded in the fault summary report will be for the power system cycle ending two cycles
prior to the end of the fault record. This is also the case if the fault record was triggered
through BESTCOMS Plus .
G During the time that the Pickup expression is true, the red Trip LED on the front panel
flashes indicating that the BE1-11
m
is picked up.
H During the time the Trip expression is true, the red Trip LED on the front panel lights
steadily indicating that the BE1-11 m is in a tripped state. If targets have been logged for the
fault, the Trip LED is sealed in until the targets have been reset.
I Breaker operations and interruption duty functions are driven by the breaker status function.
The operations counter is incremented on breaker opening. The magnitudes of the currents
that are used for accumulating breaker duty are recorded for the power system cycle ending
when the breaker status changes state. Thus, breaker duty is accumulated every time that
the breaker opens even if it is not opening under fault.
J Setting group changes are blocked when the Pickup expression is true to prevent protective
functions from being reinitialized with new operating parameters while a fault is occurring.