TB MRM3 07.01 E
19
trigger occurence
recording duration
Tpre
[s]
Figure 5.2: General Set-Up of the Fault Recorder
Each of the storage segments have a fixed storage
time where the time before the trigger event can be
defined.
Via the RS485 interface the data can be read out by
means of a PC provided with HTL/PL-Soft4. The data
is graphically edited and represented. Binary tracks
are recorded additionally, e.g. activation and trip.
5.7.2 Number of Fault Recordings
The max. recording time is 16 s at 50 Hz or 13.33 s
at 60 Hz.
The max. number of recordings to be stored has to be
defined beforehand. There is the choice between (1)*
2, (3)* 4 and (7)* 8 recordings. Hence the existing
memory space can be used as follows:
(1)* 2 recordings for 8 s at 50 Hz and 6.66 s at
60 Hz.
(3)* 4 recordings for 4 s at 50 Hz and 3.33 s at
60 Hz.
(7)* 8 recordings for 2 s at 50 Hz and 1.66 s at
60 Hz.
* will be overwritten when a new trigger signal oc-
curs.
5.7.3 Adjustment of the Trigger Event
There is the choice between four different trigger
events:
P_UP (PickUP)
Data saving begins when a general
activation is recognised.
TRIP
Data saving begins when a general
trip is recognised.
A_PI (After Pickup) Data saving begins when the last acti-
vation threshold is undershot (recog-
nises, for instance, CB failure protec-
tion)
TEST
Data saving is activated when push-
buttons <+> and <-> are pressed
simultaneously (immediately upon
pressing the buttons). For recording
time, the mode TEST is displayed.
5.7.4 Pre-Trigger Time (T
vor
)
The time T
pre
defines the period to be saved prior to
the trip event. This time can be set between 0.05 s
and the max. recording time (2, 4 or 8 s). With push-
buttons <+> and <-> the values can be changed and
with <ENTER> they can be saved.
5.8
Setting of the Clock
When date and time are set, the LED „
!
“ is on. The
following method is used:
Date:
year
Y=00
month
M=00
day
D=00
time:
hour
h=00
minute
m=00
second
s=00
Immediately when the supply voltage is applied the
clock starts with the respective date and time. The time
is buffered against short-term voltage failures (min. 6
minutes).
Note:
The window for setting the clock is behind the measur-
ing value reading. Access to the window via push-
button <SELECT/RESET>.
Содержание MRM3
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