Recording Mode - ABB DRL6600U Product Manual

Disturbance Recording and Fault Locating Device DRL6600U
Product version: V8.30

4. Recording mode

U/I
Trigger
0-25 Cycles
1-10KHz
Start time of
recording
Figure 1: A-B-C Recording and IO time sequence
Period A: record data before the system disturbance
(PreTrigger)
Period B: record data during the early period of system
disturbance (Trigger)
Period C: record data during the middle and late
periods of system disturbance (PostTrigger)
ABB
0-50 Cycles
A
1-10KHz
T-0 Start time
of disturbance
B
The disturbance recorder applies the principle of
extendable recording that switches from the A to B and
C periods, ensuring a high resolution during the
PreTrigger and Trigger periods, and adjusting to a
lower sampling rate during the PostTrigger period in
order to reduce the long term storage requirements.
When a new disturbance occurs in period C, the
recording rate switches back to the one of period A,
ensuring that the data recorded both before and after
the disturbance is done at a high rate of sampling.
If one recording happens after another within a short
interval, they are recorded in one waveform file.
150 Cycles
C
0.5-10kHz
4CAE000359
Issued: May 2017
Revision: -
7