IEC61000-4-29
This DC voltage dips, short interruptions, and voltage variation immunity tests aim to test the immunity of an electric or electronic device against sudden and gradual DC voltage drops.
For this test, we recommend you to set the instrument response speed to medium in Settings panel. Set Settings > Output Control > Output Response Speed > Medium. See Instrument Settings.
Test Setup
Set the following test conditions before starting a test. Depending on the Test, some settings are fixed and you cannot change them.
| Immunity Test | Select the test item. For Custom Test, select this setting under Test Item in the Test List panel. |
| EUT Test | The Equipment Under Test (EUT) class determines the test levels used. For Custom Test, perform this setting under Test Level on the Test List panel. The following voltage test levels are used: – 0 %, corresponding to interruptions; – 40 % and 70 %, corresponding to 60 % and 30 % dips; – 80 % and 120 %, corresponding to ± 20 % variations, or 85 % and 120 %. For DC Short Interruptions test, you can select High Impedance or Low Impedance test condition. |
| UT (Phase) (V) | Set the initial voltage (the recovery voltage is the same value).
For Custom Test, perform this setting under UT Phase (V) in the table of the Test Steps panel. The voltage range for immunity tests are: AC – 0.0 to 322.0 V DC – 0.0 to 455.0 V In some cases, the test is unsuccessful due to the output voltage exceeded the output voltage range of the instrument. You may need to adjust the UN, Udc, UT, U1, Delta, and/or Level settings and run the test again. |
| Repeat | Set the number of repetitions of the sequence (1 to 999). |
| Status | Display results upon completion of the sequence. |
| TriggerOut | Select the check box to enable the trigger signal output. When enabled, the corresponding arrow in the Test Steps diagram will change to red. |
Test Items
DC Voltage Dips
Set the following test parameters for a sequence. For Standard Test, the test parameters are fixed and you cannot change them.
| UT Phase (V) | Set the initial voltage (the recovery voltage is the same value).
The voltage range for immunity tests are: AC – 0.0 to 322.0 V DC – 0.0 to 455.0 V In some cases, the test is unsuccessful due to the output voltage exceeded the output voltage range of the instrument. You may need to adjust the UN, Udc, UT, U1, Delta, and/or Level settings and run the test again. |
| Duration (s) | Set the DC voltage dips duration in seconds (0.001 to 86,400.000 s). |
| Level (%) | Set the level that the voltage will be reduced to as a percentage of UT (0 to 200 %). |
| Interval (s) | Set the interval between the time when the voltage returns to the recovery voltage (UT) and the time when the next voltage drop will occur (0.001 to 86,400.000 s). The last interval is the transition time to the next sequence. |
DC Short Interruptions
Set the following test parameters for a sequence. For Standard Test, the test parameters are fixed and you cannot change them.
| UT Phase (V) | Set the initial voltage (the recovery voltage is the same value).
The voltage range for immunity tests are: AC – 0.0 to 322.0 V DC – 0.0 to 455.0 V In some cases, the test is unsuccessful due to the output voltage exceeded the output voltage range of the instrument. You may need to adjust the UN, Udc, UT, U1, Delta, and/or Level settings and run the test again. |
| Duration (s) | Set the DC short interruptions duration in seconds (0.001 to 86,400.000 s). |
| Impedance | Set the impedance condition. Low – Low impedance. The in-rush current from the EUT will be absorbed. High – High impedance. The reverse current from the EUT will be blocked. |
| Interval (s) | Set the interval between the time when the voltage returns to the recovery voltage (UT) and the time when the next voltage drop will occur (0.001 to 86,400.000 s). The last interval is the transition time to the next sequence. |
DC Power Supply Voltage Variations
Set the following test parameters for a sequence. For Standard Test, the test parameters are fixed and you cannot change them.
| UT Phase (V) | Set the initial voltage (the recovery voltage is the same value).
The voltage range for immunity tests are: AC – 0.0 to 322.0 V DC – 0.0 to 455.0 V In some cases, the test is unsuccessful due to the output voltage exceeded the output voltage range of the instrument. You may need to adjust the UN, Udc, UT, U1, Delta, and/or Level settings and run the test again. |
| Decreasing (s) | Set the time for decreasing the initial voltage (UT) to the low voltage (0.001 to 86,400.000 s). |
| Reduced (s) | Set the duration of the low voltage (0.001 to 86,400.000 s). |
| Level (%) | Set the level that the voltage will be reduced to as a percentage of UT (0 to 200 %). |
| Increasing (s) | Set the time for recovering the voltage from the low voltage to a value that is the same as the initial voltage (UT) (0.001 to 86,400.000 s). |
| Interval (s) | Set the interval between the time when the voltage returns to the recovery voltage (UT) and the time when the next voltage drop will occur (0.001 to 86,400.000 s). The last interval is the transition time to the next sequence. |