Siemens SIMEAS R-PMU, Руководство пользователя, Страница: 83 / 296

7
7.2 Fault Recorders
83
Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
Prefault time
The measured values are recorded continuously and stored in a ring buffer with a capacity of up
to 30 s. If a fault occurs, the prefault time of the trigger event is put at the beginning of the record
(see figure 7-12).
Figure 7-12 Composition of the fault record of prefault time, trigger and recording time
Recording time
The maximum recording time depends on the parameterized nominal frequency and is equal for
all trigger causes of the Transient Phasor Recorder.
The recording time for manual triggers can be adjusted separately. For external triggers, the
recording time cannot be parameterized. Recording is continued as long as the external control
signal is provided.
Table 7-18 Trigger values of the DAUs for acquiring process and binary signals
(dt is the filter time for the TPR)
DDAU BDAU
D
1
, D
2
, D
3
, D
4
dD
1
/dt, dD
2
/dt
dD
3
/dt, dD
4
/dt
D
5
, D
6
, D
7
, D
8
dD
5
/dt, dD
6
/dt
dD
7
/dt, dD
8
/dt
B
1
to B
16
B
1
to B
32
Fault record
Prefault time
Recording time
Channel A
Trigger
t
t
Recording of fault record
Table 7-19 Recording times of the Transient Phasor Recorder
Parameterized nominal frequency 50 Hz 60 Hz
Maximum prefault time 30 s 25 s
Maximum recording time 900 s 750 s