Power Quality Analyzer Model 3945
31
4.1.9 Alarm
• Highlight
ALARM
with
the
buttons, then press the
button.
The following screen will appear:
07/25/02 10:26
100%
Hysteresis 10 %
ON
ON
ON
ON
ON
ON
ON
3L
3L
3L
3L
Σ
3L
3L
01 s
02 s
01 s
05 min
15 min
01 min
10 min
2 1 0 V
0 0 2 0 A
0 8.0 %
1 0.0 %
1 0 0 0 W
0.9 2
0 5.0 %
<
<
>
>
>
<
>
1
2
3
4
5
6
7
8
9
10
Vrms
Arms
Vthd
Athd
W
PF
Vh
3
1
2
3
4
7
8
5
6
Figure 4-6
A programmed alarm must be set to “ON” to function properly
(gen-
eral activation or deactivation of alarms is generated in the
mode).
Modifying one or several characteristics of an alarm set to “ON”,
automatically switches it to “OFF”.
Hysteresis Percentage (1, 2, 5 or 10%)
Alarm activation (ON or OFF)
Alarm number (1 to 10)
There are 24 parameters to choose from for alarm triggering. They are: Vrms,
Urms, Arms, Vpst, Vcf, Ucf, Acf, Vumb, Aumb, Hz, Akf, Vthd, Uthd, Athd, W,
VAR, VA, DPF, PF, Tan, Vh, Uh, Ah and VAh.
Threshold value for triggering an alarm
Minimum duration from beginning threshold detection to store the alarm
(from 0.01 seconds to 99 minutes)
Less than “<” or greater than “>”
Capture - 3L: capture all phases (1, 2, or 3 depending on hookup selection)
- N: neutral capture
-
Σ
: total power capture
-
Σ
/3: average value of 3-phase capture (
Σ
/3 for 2-phase)
- 0-50 harmonic order available for harmonic event capture
Alarm Programming
Choose the parameters associated with an alarm from the available parameters
(phases survey, threshold value and minimum duration fi ltering can be pro-
grammed).
