Alarm - AEMC PowerPad 3945 User Manual

4.1.9 Alarm

• Highlight ALARM with the
The following screen will appear:
1
2
3
4
A programmed alarm must be set to "ON" to function properly (gen-
eral activation or deactivation of alarms is generated in the
Modifying one or several characteristics of an alarm set to "ON",
automatically switches it to "OFF".
Œ
Hysteresis Percentage (1, 2, 5 or 10%)

Alarm activation (ON or OFF)
Ž
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).
Power Quality Analyzer Model 3945
buttons, then press the
Hysteresis 10 %
ON 1 Vrms
ON 2 Arms
ON 3 Vthd
ON 4 Athd
ON 5 W
ON 6 PF
ON 7 Vh 3
8
9
10
07/25/02 10:26
3L < 2 1 0 V
3L < 0 0 2 0 A
3L > 0 8.0 %
3L > 1 0.0 %
Σ >
1 0 0 0 W
3L < 0.9 2
3L > 0 5.0 %
Figure 4-6
button.
100%
5
6
01 s
02 s
01 s
05 min
15 min
01 min
10 min
mode).
7
8
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