page 19
Industrial Power Corruptor Manual Rev 1.00
2.3 Types of testing
2.3.1 Choosing the type of test
Your IPC can perform several different types of electric
power tests: voltage sag and swell immunity, power supply
sustain time after interruptions, unbalance response, inrush
current, and power consumption / harmonics tests.
Often, the most difficult part of testing is connecting your
Equipment Under T
est (EUT) and the IPC. Once you have
connected, it makes sense to do as much testing as possible,
even if you don't need all of the data immediately.
2.3.2 International standards - a brief introduction
There are two different approaches to testing your equipment:
you can test your equipment to learn exactly how it performs
(then perhaps improve its performance); or you can test your
equipment to see if it meets or surpasses a standard.
Your IPC has several standard built-in: industry standards,
such as SEMI F47, CBEMA, and ITIC; international standards
such as IEC 61000-4-11; or
ganization standards such as FAA;
and military standards.
If you're not sure what standard to use for voltage sag
immunity, we recommend SEMI F47 as a good general-purpose
standard.
For detailed information about international standards, see
the Appendix or visit www
.PowerStandards.com .
2.3.3 Voltage sag (dip) / swell immunity testing
For this type of testing, you use your IPC to create sags and
swells with controlled depths and durations. Use these to verify
that your EUT can tolerate normal sags and swells, or, if it can't,
to figure out why and fix it.
You choose the depth, duration, phase angle, and (for
polyphase systems) conductor pair where the sag or swell will
be applied. Then arm and fire your IPC, and see how your EUT
responds.
Typically, you will connect test leads to the front panel
channels on your IPC, and clip them to power supplies or other
signals inside your EUT.
Then when you download the
waveforms from your IPC, you will be able to see exactly how
your power supplies respond during sags.
One typical problem occurs after voltage sags: the EUT
draws large amounts of current, and blows fuses or trips breakers.
Your IPC will automatically record the current waveforms drawn
by your EUT before, during, and after the sag.
2.3.4 Inrush current testing
Many electronic devices draw large amounts of current when
power is first applied. Y
our IPC can generate 1-phase and 3-
phase interruptions, and can record the current when power is
re-applied.
absolute-emc.com
Phone:703-774-7505
info@absolute-emc.com
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