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Programmable Stages (99)
Recorded Values of the Latest Eight Faults
Detailed information is available on the eight latest faults: Time
stamp and elapsed delay.
Table 3.43 – Recorded values of the Circuit Breaker Failure Stage
(8 latest faults) CBFP (50BF)
Parameter
Value
yyyy-mm-dd
hh:mm:ss.ms
EDly
For special applications the user can build his own protection stages
by selecting the supervised signal and the comparison mode.
The following parameters are available:
•
Priority
If operation times less than 60 milliseconds are needed
select 10 ms. For operation times under one second 20 ms
is recommended. For longer operation times and THD
signals 100 ms is recommended.
•
Link
The name of the supervised signal (see table below).
•
Cmp
Compare mode. '>' for over or '<' for under comparison.
•
Pick-up
Limit of the stage. The available setting range and the unit
depend on the selected signal.
•
t
Definite time operation delay
•
Hyster
Dead band (hysteresis)
•
NoCmp
Only used with compare mode under ('<'). This is the limit to
start the comparison. Signal values under NoCmp are not
regarded as fault.
Protection Functions
Unit
Description
Time stamp of the recording, date
Time stamp, time of day
%
Elapsed time of the operating time setting.
100% = trip
857-UM001A-EN-P – July 2009
3-71
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