3300 ACM Installation and Operation Manual Power Measurement Ltd.
Introduction 1-1
* Do not hipot test the phase current inputs.
BASE MODULE
DISPLAY MODULE
1. INTRODUCTION
1.1 DESCRIPTION
The 3300 ACM is a 16-bit, microprocessor based 3-phase
power meter which provides advanced features at an
affordable price. The 3300 ACM offers a cost-effective
alternative to analog metering and full-featured digital
instrumentation packages, while still providing high
accuracy, high reliability, and high transient, surge and
hipot withstand capabilities.
The basic model 3300 ACM can directly replace up to four
traditional analog meters and selector switches, while
additional measurement options make it possible to
replace even more. Further savings are realized through a
unique 2-module design, which simplifies wiring and
reduces installation time. This makes the 3300 ACM
perfectly suited for economical metering on 3-phase
industrial and commercial switchboards and switchgear.
An RS-485 communications port is standard, allowing the
3300 ACM to be used as either a stand-alone power
monitoring station, or as one element in a large energy
management network. The 3300 ACM is also available
without the display module, making it an ideal digital
power transducer for PLC, EMS, DCS and SCADA appli-
cations. Alternatively, the communications port can be
used to pulse kW hours.
A choice of many measurement functions and displays
The 3300 ACM may be configured to operate in Wye
(Star), Delta, or Single Phase voltage modes. The basic
model provides the following measurements:
• 3-phase line-to-neutral voltages
• Line-to-neutral average voltage
• 3-phase line-to-line voltages
• Line-to-line average voltage
• Current on each phase
• Average current
• kW, total for all phases
• kWh, total for all phases
Voltage and current measurements are true RMS, includ-
ing harmonics. Many other measurements are offered as
options, including kVAR, kVARh, kVA, kVAh, power
factor, and frequency. Demand and minima/maxima
values on all measured parameters are also available. See
Chapter 4 for a complete listing of basic and optional
measurements.
The high-visibility 20-character LCD display of the display/
keypad module provides many convenient options for
presenting measured data, including simultaneous display
of: Volts, Amps, and Power Function; all 3 voltage phases;
or all 3 current phases.
Courtesy of NationalSwitchgear.com
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