Amprobe DM-4 Power-Quality-Recorder - Manual (Page 28)

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DM-4 Power Quality Recorder
Symbols Description Advised Settings
ANOM REC. Enable = the Instrument will record Voltage Sag, Surge,
and voltage spike
☺ ☺
Disable = the instrument will not record any voltage
Sag, Surge, and voltage spike.
V1, V2, V3
V12, V23 or
V32, V31
RMS value of the voltage of phase 1, phase 2, phase 3
respectively, values of the phase-to-phase voltages 1-2,
2-3 or 3-2 and 3-1.
☺ ☺
Single phase: V1
3 wires V12 V32 V31
4 wires V1, V2, V3
Thd, DC, 01...51 Voltage Total Harmonic Distortion, DC Component,
01..51 Harmonics respectively
☺ ☺
Thd,01,03,05,07
Vref (Only if
ANOM. REC flag
has been enable)
RMS reference value for Voltage used in Voltage
Anomalies detection (Voltage Sag and Surge).
The Reference is:
a) Voltage Phase to Neutral for Single Phase and 4
wires three phase system
b) Voltage Phase to Phase for 3 wires three phase system
☺ ☺
Single phase: 230V
3 wires: 400V
4 wires: 230V
LIM+, LIM-
(Only if ANOM.
REC flag has
been set ON)
High and Low Voltage Percent threshold used in
Voltage Anomalies detection (Voltage Sag and Surge).
Example: Three Phase System 4 wires.
Vref = 120, LIM+= 10%, LIM-=10% =>
High Lim = 132V, Low Lim = 108.0V
The Instrument will detect a voltage Anomalies if the
RMS Voltage Values (calculated every 14ms) beyond
the above calculated thresholds
☺ ☺
Single phase: 120V
3 wires: 480V
4 wires 277V
I1, I2, I3, IN RMS value of the current of phase 1, phase 2, phase 3
and of the neutral respectively.
☺ ☺
Single phase: I1
3 wires: I1, I2, I3
4 wires I1, I2, I3, IN
Thd, DC, 01..51 Current Total Harmonic Distortion, DC Component,
01..51 Harmonics respectively
T
hd,01,03,05,07
Pt, P1, P2, P3,
P12, P32, P31
Values of the active power (total, of phase 1, phase 2
and phase 3) (only for 3 wires measurement)
value of the power measured by the Wattmeter 1-2 and
3-2 respectively.
☺ ☺
Single phase: P1
3 wires: Pt
4 wires Pt, P1, P2, P3