Atec AEMC-3945 User Manual
Three-Phase Power Quality Analyzer PowerPad™Model 3945 (pdf) Rev. 04 05/05
Technical Assistance (800) 343-1391 www.aemc.com 1 of 13
Three-Phase Power Quality Analyzer
PowerPad
™
Model 3945
Wouldn’t it be nice if you could
look inside your electrical system
and see what’s going on?
Troubleshooting would be so
much easier if you could see the
volts, amps and harmonic content
in real time and take pictures to
document and analyze. Now you
can do just that and more with
AEMC’s PowerPad. The full color
graphical display lets you see and
analyze each signal clearly. Its
high speed sample rate, at 256
samples per cycle, provides
excellent fidelity in reproducing
waveforms and capturing
transients that happen as fast as
62.5µs.
PowerPad’s 4MB of memory is
conveniently partitioned to let you
store four different types of data,
synchronized or independent of
each other. You can store up to
12 screen snapshots, up to
50 captured transients that contain
four cycles for each active input,
and 4096 alarm events. You can
also record trend data for days,
weeks or even months.
Six direct access function buttons
quickly let you see:
Waveforms – Display Volts,
Amps, THD and Crest Factor by
phase or for all phases. You can
display all the voltage inputs on
one screen, phase-to-phase or
phase-to-neutral. Real-time phasor
diagrams can be displayed for
volts and amps, also by phase or
for all phases.
Harmonics – Display Harmonics
out to the 50
th
for Volts, Amps and
VA. Individual Harmonics are
displayed as a percentage and in
real value. Harmonic direction and
sequencing can also be displayed.
Transients – Set, capture and
display transients. You select the
threshold and the number of
transients to capture. PowerPad
then captures four waveforms for
each transient; the triggering
waveform as well as one pre- and
two post-triggered waveforms. As
many as 1200 waveforms can be
captured.
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AEMC 3945 Power Quality Analyzer Product Page
How-To Video
Three-Phase Power Quality Analyzer PowerPad™Model 3945 (pdf) Rev. 04 05/05
Technical Assistance (800) 343-1391 www.aemc.com 2 of 13
Alarms – Configure, capture and
display up to 4096 alarm events
based on up to ten different trigger
variables. Each captured alarm
event will show the phase, the
variable and the value as well as
the time and duration.
Record – Set up and record trend
data at selectable rates from one
sample/second to one sample
every 15 minutes on as many as
22 different variables for all
phases. See the recorded data on
screen, zoom in and out and scroll
the time axis to analyze the data.
Power & Energy – Display
Watts, VARs and VA by phase
and total. Accumulate totals and
see whether the energy is
inductive or capacitive.
If you’re not convinced yet,
consider these other functions and
features:
• PowerPad uses current probes
that auto configure the
instrument’s current channel for
range and scale.
• PowerPad comes with an online
help system that gives you clear
information about the functions
and buttons for each screen.
• PowerPad comes with all options
and accessories needed to
capture, display, download,
analyze and store data. No addon accessories are required that
increase your cost. PowerPadis
supplied with AEMC’s DataView
®
Professional graphing/analysis
software package at no
additional cost (a $395.00 value).
The software lets you completely
configure and capture data in
real time on your computer. You
can download all stored data
from PowerPad and print reports
from a library of pre-designed
templates or create your own
custom templates and reports.
In addition to all of this, PowerPad
speaks six different languages. At
the press of a button, information
can be displayed in English,
Spanish, French, Portuguese,
Italian and German.
Arrange for a demonstration today!
Tilt-out bail facilitates bench top operation for convenient viewing of display.
Three-Phase Power Quality Analyzer PowerPad™Model 3945 (pdf) Rev. 04 05/05
Technical Assistance (800) 343-1391 www.aemc.com 3 of 13
Features
•
True RMS single-, two- and three-phase
measurements at 256 samples/cycle, plus DC
• Real-time color waveforms
• Easy-to-use on-screen setup
• Automatic current probe recognition and scaling
• True RMS voltage and current measurement
• Measures DC volts, amps and power
• Display and capture voltage, current and power
harmonics to 50
th
order, including direction, in real time
• Capture transients down to 1/256
th
of a cycle
• Phasor diagram display
• Peak voltage and current
• Nominal frequency from 40 to 70Hz
• VA, VAR and W per phase and total
• kVAh, VARh and kWh per phase and total
• Neutral current display for three-phase
• Crest factors for current and voltage
• Transformer K-factor display
• Power Factor, displacement PF display
• Captures up to 50 transients
• Short-term flicker display
• Phase unbalance (current and voltage)
• Harmonic Distortion (total andindividual) from 1
st
to 50
th
• Alarms, surges and sags
• Records date and characteristics of disturbances
• Immediate printout directly to a printer
• Screen snapshot function captures waveforms or other
information on the display
• Optically isolated RS-23 communication port
• Includes DataView
®
Professional software for data
storage, analysis and report generation
• EN 61010, 600V Cat. III
Applications
• Verification of power distribution circuits
• Measurement and recording of power system quality
(kW, VA, VAR)
• Energy metering(kV Ah,VARh, kWh)
• In plant troubleshooting of power distribution panels and
individual machinery
• Monitor pad mount transformers
• Determine harmonic problems originating from source or
load
• Monitor phase unbalances
• Determine transformer K-factor
• And much, much more
Power quality analysis on a three-phase panel using the AmpFlex
™
flexible current probes.
Measure all three phases of voltage and current
simultaneously.
Three-Phase Power Quality Analyzer PowerPad™Model 3945 (pdf) Rev. 04 05/05
Technical Assistance (800) 343-1391 www.aemc.com 4 of 13
Functional Displays
Display transients that were captured –
each transient consisting of one pre-triggered cycle, the triggered cycle and two
post-triggered cycles. All inputs are stored
when a transient is captured. Up to 50
transients can be stored, each consisting
of four cycles and up to six inputs for a
total of 1200 transient waveforms.
Voltage, current and power harmonics can be displayed in real time, in bargraph and text form, and stored in memory.Individual
harmonics can be analyzed by moving the horizontal cursor to that harmonic. Harmonic direction (source-to-load or load-to-source) can
be displayed for power harmonics. Har monic sequencing (negative, zero and positive) can be displayed for volts or amps for all phases.
Transient Mode
Harmonics Mode
Information on screen (real-time or stored
data) can be sent to a printer using the
serial interface by simply pressing the print
button.
You can store up to 12 screen snapshots
simply by pressing the camera button while
the desired information from any of the
instrument’s modes is on the display.Any
of the stored snapshots can be selected
and displayed by selecting it from the list.
PrintingSnapshot Mode
Configuration is simple and straightforward.Simply press the setup button and select the
function you wish to configure.For example, to configure the input, select the desired
hookup from the graphical choices for single-, two- and three-phase.Neutral current is
calculated in the 4-wire hookup.
Configuration
PowerPad’s direct access
system lets you see the
important information you
need at the press of a button.
Quickly review waveforms,
harmonics, transients, alarms
and recorded data on screen.
Setup is straightforward using
a combination of graphic and
text prompts to quickly
configure PowerPad for
the job site.
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