Power Quality Analyzer Model 3945
9
ON / OFF button.
Three (3) current inputs on the top of the instrument to enable the use of
current sensors (MN, SR, AmpFlex™, and MR probes).
Four (4) voltage inputs.
RS-232 bidirectional optical output for transferring data to a PC (bidirectional)
or printing to a dedicated printer (DPU 414 - SEIKO).
AC Line power input.
Enter
button.
Four (4) buttons that enable movement of the cursor, browsing or the selec-
tion of data.
Buttons for directly accessing the 6 display modes at any time:
Transients (set recording or view recorded transient):
• displays waveforms such as, motor startup current (INRUSH) and
interruptions
Harmonics View:
• representation of the harmonic ratios of voltage, current and
power, for each harmonic through the 50
th
• determination of harmonic current produced by non-linear loads
• analysis of the problems caused by harmonics according to their
order (heating of neutrals, conductors, motors, etc.)
Waveforms
View:
• displays voltage and current waveforms or vector representation
(Phasor diagram)
• identifi cation of signal distortion signatures
•
display of amplitude and phase unbalance for voltage and current
• checking connections for correct phase order
Power / Energy (view or start energy monitoring):
• display of power levels and the associated parameters
(power factor, displacement and tangent)
•
energy
monitoring
• four quadrant measurement to discern produced/consumed
active energies and inductive/capacitive reactive energies
Recording (set recording or view recorded data):
• time-related representation as bar charts or curves, of average
power levels or of the average value of any parameter
• line voltage stability check
• management of power consumed and generated
• monitoring of harmonic variations
