PQ Signal Generator
Signal generator for testing PQ analyzers
Comprehensively examine
power quality phenomena
The need to verify the functionality and accuracy of power quality meters/analyzers requires appropriate calibration equipment. The Test Universe module PQ Signal Generator turns a CMC into a calibration tool that generates all kinds of power quality phenomena according to IEC 61000-4-30.
Convenient and cost-effective
testing solution
PQ Signal Generator features a powerful and easy to use interface, that also allows to combine different power quality phenomena for comprehensive testing. In the past, the testing of PQ related equipment required a high level of investment in separate testing equipment. With PQ Signal Generator, the testing of PQ analyzers can be performed with the CMC test set quickly and easily.
Key Features
The following power quality phenomena can be output with the “PQ Signal Generator” module:
- Power frequency
- Power supply voltage
- Flicker
- Dips & Swells
- Voltage interruption
- Transient voltages
- Voltage unbalance
- Harmonics
- Interharmonics
- Rapid voltage changes
Power quality testing: Features
that make the difference
Generate flicker according to IEC 61000-5-15
Based on tables 1 and 2 of the IEC 61000-4-15:2010 standard, the module provides a selection of predefined test points for short-term flicker severity Pst and instantaneous flicker sensation Pinst.
Superimpose harmonics and interharmonics
Voltage and current signals with superimposed harmonics (up to the 60th harmonic at 50 Hz or 50th harmonic at 60 Hz) and interharmonics up to 3 kHz can be generated. Harmonic magni¬tudes can be entered either in absolute values or in percentages of the fundamental value. For advanced applications, even fluctuating harmonics can be generated. If only one interharmonic is used the frequency resolution for this is 1 mHz, moreover any combination of interharmonics with whole-number Hertz values can be set up.
Generate cyclic notches
An example of the module´s versatility is the generation of cyclic notches. The notch depth and the angle of occurrence can be adjusted independently; the minimum gap-width for notches is 300 μs. This function can provide the possibility to simulate the system perturbation of a thyristor-controlled motor.
Use test sequences to facilitate automation
PQ Signal Generator allows the creation of comprehensive test sequences. Test steps can be grouped and run repeatedly in a user-definable number of loops. If the test object signals that limit values have been exceeded via an alarm contact, this can be used for automatic evaluation of test results.
Test PQ analyzers according to IEC 62586
PQ Signal Generator enables the CMC test set to support testing in accordance with IEC 62586. This standard defines the test methods to verify compliance with IEC 61000-4. An extensive testing library is available to provide support in performing most type tests required by these standards.
The CMC 430 can be used to test PQ analyzers up to accuracy class A.
What is required for testing PQ analyzers in accordance with IEC 62586-2?
The following components are required to test PQ analyzers in accordance with IEC 62586-2:
- CMC test set with at least three voltage and three current channels
- OMICRON Control Center
- Test Universe modules
- PQ Signal Generator
- State Sequencer
- Ramping
- Control Center, State Sequencer, and Ramping are included in the Essential Package
- Standard-compliant test templates, including detailed descriptions, are available in the PTL
- Time synchronization is required for some tests – for example, with the CMGPS 588.
Videos
PQ Signal Generator Module
Testing Power Quality Analyzers Part I
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