IEC61000-4-34
This voltage dips, short interruptions, and voltage variation immunity tests aim to test the immunity of an electric or electronic device against sudden and gradual power supply voltage drops. IEC61000-4-34 is the standard for currents that exceed 16 A.
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 | For Standard Test, select the Equipment Under Test (EUT) class. The EUT class determines the test levels used . Products are categorized into four classes, 1, 2, 3 and X, with X being a class defined and customized by users. For equipment connected directly or indirectly to the public network, the levels shall not be less severe than class 2. Test levels for class 1 and X are not specified in the standard itself. Testing levels for these classes are defined in product specific IEC standards which refer to the generic standard for test methods and equipment to be used. |
| Test Level (%) | For the Voltage Dips and Voltage Variations tests, set the level that the voltage will be reduced to as a percentage of UT. For the Short Interruptions test, this setting is fixed to 0 % and you cannot change it. |
| 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. |
| Freq (Hz) | Set the rated frequency of the EUT. |
| Phase Select | This setting only available when Output Coupling is set to AC and Output Mode is set to 3P. Select phase voltage or line voltage. Phase voltage (Ua, Ub, or Uc) – Select which phase to dip the voltage (multiple sections allowed). Line voltage (Ua-Ub, Ub-Uc, or Uc-Ua) – Select between which two lines to dip the voltage (multiple selections not allowed). If you select the Short Interruptions test, short interruptions will occur at the same time on all phases. |
| Change Angle (°) | For the Voltage Dips and Short Interruptions tests, set the starting phase angle. |
| 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
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. |
| Dips (cycle) | Set the number of cycles of the voltage dip (0.1 to 10,000.0 cycles). The number of cycles that you enter is converted to time and displayed in blue in the diagram above, under "Dips".
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| Level (%) | Set the level that the voltage will be reduced to as a percentage of UT (0 to 200 %).
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| Change Angle (°) | Set the starting phase angle (0.0° to 359.0°). |
| 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 (0.020 to 86,400.000 s). The last interval is the transition time to the next sequence. |
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. |
| Short (cycle) | Set the number of cycles of the voltage dip (0.1 to 10,000.0 cycles). The number of cycles that you enter is converted to time and displayed in blue in the diagram above under "Short".
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| Change Angle (°) | Set the starting phase angle (0.0° to 359.0°). |
| 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 (0.020 to 86,400.000 s). The last interval is the transition time to the next sequence. |
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. |
| Level (%) | Set the level that the voltage will be reduced to as a percentage of UT (0 to 200 %). |
| Decreasing (s) | Set the time for decreasing the initial voltage (UT) to the low voltage (0.020 to 86,400.000 s). |
| Reduced (s) | Set the duration of the low voltage (0.010 to 86,400.000 s). |
| 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) (0.010 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 (0.020 to 86,400.000 s). The last interval is the transition time to the next sequence. |