1 Introduction
The PowerMaster
®
3 Series is a handheld field instrument with a true 3-phase analyzing
standard. There are two versions of the 3 series, the 3301, and the 3302. The 3301 has the
ability to do customer load meter testing, register and demand testing, and provides access to
vector diagrams, waveforms, and harmonics. The 3302 has the same ability, but also adds CT
and PT burden measurement, CT and PT ratio testing, and direct current inputs.
Accuracy
With an accuracy of ± 0.05% on direct current channels and ± 0.10% accuracy on the probe
channels, the PowerMaster
®
is 4 times more accurate than most meters.
User Interface
The user interface is a Windows CE based program that enables the user to perform complex
tasks with an easy-to-use dashboard. This allows the user to either select the appropriate test
within the list, or select "Integrated Site Testing" which incorporates all tests together in a step-by-
step process. Hot keys on the front panel are used as shortcuts to quickly view the vector
diagram, power meter, waveforms, and harmonics at any time during testing. With features
designed to help the meter technician with their job, this user interface is a tool for beginners to
metering that normally was designated to seasoned technicians and engineers only.
Integrated Site Testing
Using Integrated Site Test, the user can easily test the entire site using a step-by-step process
that eliminates mistakes and proves the installation is operating accurately. Integrated Site Test
allows the user to perform tests in sequence that are built into the PowerMaster
®
. The user will
have the option to customize each test for a particular site, which can be associated to any site in
the database. These test setups can be created and customized as many as required.
Instrument Transformer Testing
Some of the most powerful features of the PowerMaster
®
are in the Instrument Transformer
Testing section. The PowerMaster
®
3302 has the ability to sequentially test all three CTs and
PTs in the metering circuit. Using the Hot Keys, the user can quickly view the power pairs
(secondary and primary) for diagnostics. Each test displays the graphs of the ratio and the
parallelogram for all phases on one page. A brand new feature limited to the 3302 as well is the
ability to measure the total burden on the circuit. With a simple quick test, the total burden of the
CT circuit can be measured and analyzed to determine the potential for an overburdened CT.
With the introduction and inclusion of the 303/335 accessory, customers can also now perform a
burden added test, with added burden points of 0.1, 0.3, 0.5, 1 and 2 ohms.
Customer Load Meter Testing
In accordance with ANSI C-12.1-2001 using Method 3 (5.1.5.3), a customer load test can be
performed. The PowerMaster
®
can determine within seconds how accurate the meter is under
real-world conditions. Determining this accuracy is incredibly valuable since the customer is
being billed under these conditions.
Phantom Load Meter Testing
With the inclusion of the 305/335 accessory, customers can now perform a phantom load test
with current only up to 5A.
Hot Keys
The user can easily access important functions at any time in the PowerMaster
®
with a push of a
button. The 1) vector diagram, 2) power meter, 3) waveforms, and 4) harmonics all have
dedicated buttons on the PowerMaster
®
front panel. These keys can be alternatively accessed
using a PC/laptop or USB keyboard via function keys (F7-F10 respectively).
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