Systems® Inc. Model
929A Three phase Power Meter is
an economical alternative to
both the Model 931A Power System
Analyzer and the Model 930A
Three Phase Power Analyzer when
serial communication, DC voltage
calibration and timer features
are not required. The Model 929A
has the same AC accuracy as the
Model 931A with PowerDSA™
Digital Signal Analysis, and is
a complete diagnostic tool for
use in the substation and
industrial power environment.
Model 929A measures all of the
basic quantities: true-rms
voltage and current, frequency
and phase angle, as well as
power quantities such as watts,
volt-ampere hours, volt-amperes
reactive, volt-amperes reactive
hours and power factor, all with
0.11% basic accuracy.
The 929A includes a full three-phase
input section, for automated three-phase
measurement sequences, complete with
multiple display modes - Basic three-phase
display - voltage,
frequency and power
quantities on one
sequence and energy
View voltages, currents and phase angles
with their vector representation.
Voltage /Current Sequence Display
― view voltage,
current and phase along with positive,
negative and zero sequence values.
Energy Display ― view voltage,
current, phase, frequency and energy
quantities on one convenient display.
Supports two main measurement channels.
Channel 1 and channel 2. Any voltage or
current input signal may be selected for
either channel. For basic measurements
(voltage, current, frequency, phase
angle) any combinations of inputs may be
used. For power and energy measurements
(active power, apparent power, reactive
power and power factor), one voltage and
one current must be selected. For
three-phase measurements, the input
configuration is selected automatically,
based on the measurement type (foe
example, 3-phase 4-wire 3-element).