IEC61000-4-13
This harmonics and interharmonics immunity tests aim to test the immunity of an electric or electronic device against power supply voltage waveform distortion.
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 | For Custom Test, select the 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 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. |
| U1 (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. |
| Freq (Hz) | Set the rated frequency of the EUT. |
| 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, for test item with Test Steps diagram display, the corresponding arrow in the Test Steps diagram will change to red. |
Test Items
Flat Curve
The voltage follows a time related function in which each half-wave consists of three parts.
Set the following test parameters for a sequence. For Standard Test, the test parameters are fixed and you cannot change them.
| Flat Level (%) | Set the level that the voltage will be reduced to as a percentage of UT (40 to 100 %).
|
| Ky | Set the voltage ratio (1.000 to 1.5000).
|
| Duration (s) | Set the flat curve waveform duration in seconds (0.020 to 86,400.000 s). Waveforms are switched when the fundamental wave’s phase angle is
0°. In other words, the present waveform is not switched when the set time elapses, but when the fundamental wave’s phase angle next becomes 0°. |
| Interval (s) | Set the interval between the time when the voltage returns to the recovery voltage (U1) and the time when the next waveform clipping will occur (0.020 to 86,400.000 s). The last interval is the transition time to the next sequence. Waveforms are switched with the same timing as was explained for the Duration. |
Over Swing
Over swing is generated by adding a discrete value of the third harmonic and also of the fifth harmonic both with a corresponding phase relationship.
Set the following test parameters for a sequence. For Standard Test, the test parameters are fixed and you cannot change them.
| Harm. 3 Level (%) | Set the voltage levels of the third-order harmonic that will be superimposed on the fundamental wave as percentage of U1 (0.0 to 100.0%). Even if you change the test level, RMS is maintained at the U1 value. |
| Harm. 5 Level (%) | Set the voltage levels of the fifth-order harmonic that will be superimposed on the fundamental wave as percentage of U1 (0.0 to 100.0 %). Even if you change the test level, RMS is maintained at the U1 value. |
| Angle 1 (°) | Set the phase angles of the third-order harmonic that will be superimposed on the fundamental wave. (0.0° to 360.0°). |
| Angle 2 (°) | Set the phase angles of the fifth-order harmonic that will be superimposed on the fundamental wave. (0.0° to 360.0°). |
| Duration (s) | Set the over swing waveform duration in seconds (0.020 to 86,400.000 s). Waveforms are switched when the fundamental wave’s phase angle is 0°. In other words, the present waveform is not switched when the set time elapses, but when the fundamental wave’s phase angle next becomes 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. Waveforms are switched with the same timing as was explained for the Duration. |
Sweep In Frequency
Set the following test parameters for a sequence. For Standard Test, the test parameters are fixed and you cannot change them.
| Harmonic Range | The five available ranges. |
| Harmonics Step | Set the step (0.1 to 1.0) of the sweeping of the harmonics that will be superimposed on the fundamental wave (enter this as a difference of orders). The sweep proceeds in ascending order from lower orders to higher orders. |
| Level (%) | Set the level of the harmonics that will be superimposed on the fundamental wave as percentages of the fundamental wave (0.0 to 100.0 %). |
| Time (s) | Set the duration of the sweeping of the harmonics that will be superimposed on the fundamental wave (150.000 to 86,400.000 s). Waveforms are switched when the fundamental wave’s phase angle is
0°. In other words, the present waveform is not switched when the set time elapses, but when the fundamental wave’s phase angle next becomes 0° |
Even Harmonics
Set the following test parameters for a sequence. This test item is only available for Custom Test.
| Harmonic | The even numbers harmonics (2 to 40). |
| Level (%) | Set the levels of the harmonics that will be superimposed on the fundamental wave as percentage of the fundamental wave (0.0 to 100.0 %). |
| Enable Angle 2 | Select the check box to enable phase angle 2. |
| Angle 1 / Angle 2 (°) | Set the phase angles of the harmonic that will be superimposed on the fundamental wave. (0.0° to 360.0°). |
| Duration (s) | Set the duration of the harmonics that will be superimposed on the fundamental wave in seconds (0.000 to 86,400.000 s). Waveforms are switched when the fundamental wave’s phase angle is
0°. In other words, the present waveform is not switched when the set time elapses, but when the fundamental wave’s phase angle next becomes 0°. If you set the Duration to 0.000 s, the corresponding Duration and Interval steps will be skipped. |
| Interval (s) | Set the wait time until the next harmonic is superimposed (0.000 to 86,400.000 s). During this interval, only the fundamental wave is generated. The last interval is the transition time to the next sequence.
Waveforms are switched with the same timing as was explained for the Duration.
If you set the Interval to 0.000 s, the corresponding step will be skipped. |
Odd Harmonics (Multiple of 3, Non Multiple of 3)
Set the following test parameters for a sequence. These test items are only available for Custom Test.
| Harmonic | The odd numbers harmonics. The setting is fixed to the following sequences and you cannot change the setting. Multiple of 3 – 3, 9, 15, 21, 27, 33, 39. Non Multiple of 3 – 5, 7, 11, 13, 17, 19, 23, 25, 29, 31, 35, 37. |
| Level (%) | Set the levels of the harmonics that will be superimposed on the fundamental wave as percentage of the fundamental wave (0.0 to 100.0 %). |
| Enable Angle 2 | Select the check box to enable phase angle 2. |
| Angle 1 / Angle 2 (°) | Set the phase angles of the harmonic that will be superimposed on the fundamental wave. (0.0° to 360.0°). |
| Duration (s) | Set the duration of the harmonics that will be superimposed on the fundamental wave in seconds (0.000 to 86,400.000 s). Waveforms are switched when the fundamental wave’s phase angle is
0°. In other words, the present waveform is not switched when the set time elapses, but when the fundamental wave’s phase angle next becomes 0°. If you set the Duration to 0.000 s, the corresponding Duration and Interval steps will be skipped. |
| Interval (s) | Set the wait time until the next harmonic is superimposed (0.000 to 86,400.000 s). During this interval, only the fundamental wave is generated. The last interval is the transition time to the next sequence.
Waveforms are switched with the same timing as was explained for the Duration.
If you set the Interval to 0.000 s, the corresponding step will be skipped. |
Interharmonics
Set the following test parameters for a sequence. For Standard Test, the test parameters are fixed and you cannot change them.
| Harmonic Range | The five available ranges. |
| Harmonics Step | Set the step (0.1 to 1.0) of the sweeping of the interharmonics that will be superimposed on the fundamental wave (enter this as a difference of orders). The sweep proceeds in ascending order from lower orders to higher orders. |
| Level (%) | Set the level of the harmonics that will be superimposed on the fundamental wave as percentages of the fundamental wave (0.0 to 100.0 %). |
| Time (s) | Set the duration (per step) of the interharmonics that will be superimposed on the fundamental wave. (5.000 to 86,400.000 s). |
| Interval (s) | Set the wait time until the next interharmonic is superimposed (the wait time until the next step) (1.000 to 86,400.000 s). During this interval, only the fundamental wave is generated. |
Meister Curve
Set the following test parameters for a sequence. For Standard Test, the test parameters are fixed and you cannot change them.
| Frequency Range | The four available ranges. The ranges vary depending on the Freq (Hz) setting. |
| Frequency Step | The correspondence frequency step for the frequency range. |
| Level (%) | Set the levels of the harmonics that will be superimposed on the fundamental wave as percentages of the fundamental wave. If you specify a value between 0.0 and 99.9, that value will become the level percentage. If you specify a value between 100 and 5000, the level percentage will be calculated from “input value / f.” |
| Time (s) | Set the duration of the sweeping of the harmonics or interharmonics that will be superimposed on the fundamental wave (150.000 to 86,400.000 s). |