Disturbance Recorder (Dr); Transformer Supervision - Allen-Bradley Rockwell Automation 857 User Manual

Disturbance Recorder (DR)

The operation of disturbance recorder depends on the following
settings. The recording time and the number of records depend on
the time setting and the number of selected channels.
Table 10.43 – Disturbance recorder (DR)
Mode of recording
Sample rate:
- Waveform recording
- Trend curve recording
Recording time (one record)
Pre-trigger rate
Number of selected channels

Transformer supervision

Table 10.44 – Current transformer supervision
Pick-up current
Definite time function:
- Operating time
Reset time
Reset ratio Imax>
Reset ratio Imin<
Inaccuracy:
- Activation
- Operating time at definite time function
Table 10.45 – Voltage transformer supervision
Pick-up setting U2>
Pick-up setting I2<
Definite time function:
- Operating time
Reset time
Reset ratio
Inaccuracy:
- Activation U2>
- Activation I2<
- Operating time at definite time function
Technical Data
Saturated / Overflow
32/cycle, 16/cycle, 8/cycle
10, 20, 200 ms
1, 5, 10, 15, 30 s
1 min
0.1 s – 12 000 min
(must be shorter than MAX time)
0 – 100%
0 – 12
0.00 – 10.00 x I
N
DT
0.06 – 600.00 s (step 0.02 s)
<60 ms
0.97
1.03
±3% of the set value
±1% or ±30 ms
0.0 – 200.0 %
0.0 – 200.0 %
DT
0.06 – 600.00 s (step 0.02 s)
<60 ms
3% of the pick-up value
±3% of the set value
±1%-unit
±1% or ±30 ms
857-UM001A-EN-P – July 2009
10-19