Atec NHResearch-4600 Series - Manual (Page 2)

APPLICATION
4600 AC Loads are design for test applications that require linear and non-linear AC loading in several emulation
modes with power and crest factors control. This programmable versatility allows testing with a wide variety of
potential field operating conditions to assure unit-under-test (UUT) reliability. Products tested include
uninterruptible power supplies (UPS), AC sources, inverters, switches, circuit breakers, fuses and connectors.
EMULATION MODES
To provide testing under the broadest range of loading conditions, the 4600 Series offers 7 different emulation
modes. Constant Current (CC) mode provides current to be drawn constantly, making it suitable for non-linear,
linear and regulation loading. While Constant Resistance (CR) mode allows the load to emulate a power resistor,
Constant Voltage (CV) allows emulating a shunt regulator. Constant Power (CP) mode emulates a constant-power
load such as a switching power supply. The Short Circuit (SC) mode allows the load to test the UUT’s short
circuit protection capability. Unity Power Factor (UPF) mode causes power factor to be as close as possible to
unity, useful when the input voltage is non-sinusoidal. The new Complex Non-Linear Waveform (CNL) Mode
allows the user to define the waveform to prevent UUT current overstressing in the event of a voltage collapse.
These comprehensive capabilities provide the user almost every conceivable AC loading condition.
USER-DEFINED WAVEFORMS
The 4600 has the ability to control current through a user-
defined waveform. The waveform is created by a powerful
graphical editor that facilitates starting with a straight line or
modifying a generated waveform based on current, power and
crest factor. The graphical editor includes an auto-check feature
to ensure the settings are compatible with each other and within
the capabilities of the load. It also supports waveform
smoothing, symmetrical and asymmetrical waveform creation.
With this editor, waveforms can be quickly created to duplicate
complex transient conditions. This would include adding
asymmetrical inflections, inserting transient anomalies such as
spikes and dropouts, and just about anything else that can be
drawn as a single-cycle waveform.
100-STEP MULTI-MODE MACROS
Macros are queues of up to 100 steps that can be triggered
locally, thereby providing very fast current, power and crest
factor changes, up to every cycle. Further, a Macro can be
executed as a single shot or looped.
em POWER LE TEST EXECUTIVE OPTION
The 4600 is supplied with software for a PC softpanel that
provides complete instrument control, measurement and
waveform display. Upgrading to a full test executive with
drivers for all NHR power instruments is also possible through
emPower LE, which adds a test sequencer, basic test routines,
and reporting.
User-Defined Asymetrical Current Waveshape
Start-Up Inrush Current Macro
2.000 mS/div
Wf1, Chn 001, 100 V/div.
Wf2, Chn 002, 20 A/div
10.000 mS/div
Wf1, Chn 001, 100 V/div.
Wf2, Chn 002, 20 A/div
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