Analyze the test method of IEC61000-4-11 voltage interruption and sag

The abnormal fluctuation of the power grid can easily affect the normal use of the equipment, and even seriously damage the equipment. Therefore, AC power supply is generally used to simulate the abnormal power supply of equipment to verify the anti-interference of equipment. This paper mainly introduces IEC 61000-4-11 test methods for voltage interruption and voltage sag.

First of all, we can simulate various power grid anomalies through the programming function. The PSA series programmable AC power supply has built-in list programming, line simulation and other functions. Through the programming function, we can quickly obtain various waveforms that need to be tested. For some common test standards, the PSA professional power supply has built-in IEC 61000-4-11/13/14/28/29 standard, which can directly call the output.

Voltage sag and interrupt output

As shown in the following figure, voltage sag and voltage interruption standards:

Figure 1. Voltage sag standard requirements

Figure 2. Short-time interruption standard requirements

Use the list programming function to simulate the output sag and interrupt waveform, as shown below:

Figure 3. List programming page

List programming can independently control the three-phase power supply, and can also be changed to single-phase output. The required waveform can be edited by changing the parameters of each step. The AC voltage, DC voltage, frequency and phase can be edited to start and end the waveform.

The output waveform is shown below:

Figure 4. Voltage sag output waveform

Figure 5. Voltage interruption output waveform

The programming function can flexibly output various complex waveforms to meet the test requirements of various standards.

In addition, IEC-4-11 standard has been built in, which can directly call the output for quick test. The following settings are voltage sag and interruption interfaces:

Figure 6. Voltage sag setting interface

Figure 7. Voltage interruption setting interface

PSA series programmable AC power supply has power grid analog output equipment with high precision and wide output range, which can provide multiple output voltage simulation modes, and provide normal or abnormal response to the challenges of test verification for engineering test verification of voltage sag, short interruption, voltage change and other electrical and electronic products.