User manual

Compliance Test System 3.0 User Manual
Note: The voltage harmonic limits apply to the AC source qualification and may indicate that
the current harmonics are affected due to excessive AC voltage distortion. In this case, a
red Source Qual. label is shown on the left hand side of the main window.
When displaying the current harmonics, the actual harmonic currents from the second through
the fortieth for each acquisition window are shown in green. The IEC test limits are shown using a
red line. Note that this red line always displays the 100 % IEC test limits during Steady State
testing, regardless of the user specified test margin which is used for the Pass or Fail
determination. (see "Setting the Test Margin" , found in paragraph Error! Reference source not
found.).
Note: The fundamental current is not shown in the harmonics graphs as there is no test limit for
the fundamental.
5.8.3 Aborting a Test
Tests in progress can be aborted at any time by clicking on the Stop button. Aborted test data
files will be marked as incomplete.
5.9 Printing Results
The Report button allows you to print both on-screen graphs displays and current and voltage
harmonics test result data to an MS Word document. This provides a test report that displays the
test setup, the Pass or Fail result and a graph of the voltage and current waveform as well as the
worst case values for each of the current harmonics. The Report button is available at the end of
a test run or any time a test is aborted with the Stop button.
Note: The MS Word version supported is Word 9.0 (Word 2000). Older versions of MS Word
may no longer work when upgrading to the latest CTS 3.0.XX software version. In that case, a
newer version of MS Word may have to be installed.
5.10 Harmonics Test Data Files
The CTS 3.0 Software can be configured to log test data to a file. The file format used is
proprietary but can be converted at the end of the test to an ASCII text file with tab delimited
fields for voltage, current, power, peak current and all the current harmonics. This data is
recorded in real-time or three to four times a second.
Longer test times will result in larger test data files and reports. If you increase the test time,
make sure you have sufficient hard disk space available to accommodate these long test files.
The rate at which data is written to disk can be decreased to avoid excessive file sizes. The point
at which the program will reduce the rate of data storage can be set in the configuration. Should
a test failure occur while the CTS 3.0 program is in this reduced data rate recording mode, full
rate data recording resumes for a specified number of acquisition buffers. This always provides
detailed information around the time of the failure. These recording rate settings can be set in
the miscellaneous section of the configuration program.
5.11 Three Phase Testing
Three phase testing is similar to single phase testing described above except that three line
voltages and three line currents are being measured simultaneously and displayed in the CTS
3.0 software GUI.
The three phase mode screens are virtually identical in function and form to the single-phase
screens. The user can view one phase at a time, or all three phases simultaneously.
82 Revision N California Instruments