Power Quality Analyzer Model 3945
45
The table below lists the capture threshold levels, based on the probe in use (for
the current channels) and voltage at the different percent selections.
Thresholds
100%
50%
20%
10%
5%
2%
1%
MN clamp
200A
100A
40A
20A
10A
4A
2A
SR clamp
1000A
500A
200A
100A
50A
20A
10A
AmpFlex™
2900A
1400A
580A
290A
140A
58A
29A
MR clamp
1000A
500A
200A
100A
50A
20A
10A
2999A ratio adapter
3000A
1500A
600A
300A
150A
60A
30A
1A ratio adapter
1A
0.5A
0.2A
0.1A
0.05A
0.02A
0.01A
Voltage
480V
240V
96V
48V
24V
9.6V
4.8V
Transients are detected by comparing all 256 samples on the current cycle with
their counterparts from the previous cycle for each active input channel. Should
any one sample deviate from its counterpart by the selected percentage value in
the set up, this will be considered a transient and the data will be captured.
When capture occurs, four cycles are recorded for each input. These include the
trigger cycle, the previous cycle to the trigger and the two cycles that follow the
triggered cycle. All active inputs will be captured.