User Manual California Instruments
CSW Series 139
8.2 IEC 61000-4-11 Option
8.2.1 General
The IEC1000-4-11 option is capable of performing IEC1000-4 section 11 voltage dips, short
interruptions and voltage variations immunity tests. On three-phase CSW Configurations, the
user can select one, two or all three phases to be active during the IEC1000-4-11 tests in this
configuration.
8.2.2 Standard Revisions and EUT Classes
The–411 option supports both the first (1994-06) and the second edition (2004-03) of the IEC
61000-4-11 test standard. The desired standard revision can be selected when using the GUI
Windows program. From the front panel, there is no need to select the revision but data values
can be set that support either version of the standard.
Generic tests files are distributed with the GUI program for both editions of the test standard.
Files applicable to Edition 2.0 have ED20 in their file name. Do not mix these files, as the data
setup will not be correct if you do. To load a test file, select the Mode (Dips or Vars) and test
standard revision first, then use the File, Open menu to load the test parameters. Test
parameters can be a function of the EUT class. The different files provided with the program
cover the various EUT classes. The relevant EUT class 1, 2, 3 or X is listed in the file names.
When using front panel operation, the user has to set levels for each individual test step in
SINGLE mode.
8.2.3 Initial Setup
The user must set the operating frequency and voltage and close the output relay prior to the
start of test. It is possible to change the normal voltage (Ut) from the IEC1000-4-11 menus
before running each test. To run any IEC 61000-4-11 test, the IEC411 state must be turned on.
If an EOS1 or EOS3 is detected, it will be put in ACTIVE mode as long as the IEC411 state is
ON.
8.2.4 Phase Selection
On three phase power source models, phase selection for individually executed dips or the
preset RUN ALL selection can be made using the PHASE key on the front panel. The phase or
phases selected will be displayed in the upper right hand corner of the LCD as either A, B, C,
AB, AC, BC or ABD.
With the introduction of Edition 2.0, three phase voltage dips testing has been redefined for both
Wye and Delta loads.
For Star (Wye) connected three-phase EUT’s,.voltage dips should be performed on both
individual Line-to-Neutral voltages as well as on all three Line-to-Line voltages. Thus, each test
should be run 6 times, each time selecting a different phase option: A, B, C, A+B, A+C and B+C.
For Delta connected three-phase EUT’s,.voltage dips, only Line-to-Line voltages dips have to be
run. Thus, each test can be run 3 times, each time selecting a different phase A+B, A+C and
B+C.
Note that the –411 option in CSW Series AC sources with Firmware revision lower than 2.38 will
not support 2 phase out of 3 selections. CSW Series I systems with firmware revision 3.04 or
higher and CSW Series II systems with firmware revision 4.17 or higher support three phase
dips testing using the preferred method referenced in figure 4b) (A) of IEC 61000-4-11, Edition
2.0. CSW units with revisions prior to this will change the L-N amplitude by the set dip level but
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