The power quality problem is the changes in voltage, current and frequency that cause electrical or electronic devices to malfunction or fail at all. One of the factors disrupting power quality is waveform disturbance. The cause of the waveform disturbance is the change in the sinusoidal shape at the fundamental frequency. One of the basic waveform disturbances is harmonics.
Harmonics are technically the name given to sine-shaped voltages and currents at the integer multiples of the normal operating frequency of the supply system. These harmonics are composed of non-linear elements connected to the power system. Intermediate harmonics, on the other hand, is the name given to voltages and currents with a frequency distribution that is not exactly multiples of the normal operating frequency of the supply system.
The main sources of harmonic generation are: static AC / DC power converters, frequency converters, rectifiers and inverters, DC motors, AC speed controllers, arc furnaces and electrolysis units and uninterruptible power supplies.
The problems caused by harmonics are: heating in devices and cables, mechanical vibrations in machines, failure of the ignition circuits, electronic card failures, power losses and punctures in power capacitors, blows in fuses, breaks in switches and switches, breakage of relay signals and abnormal operation, energy loss and abnormal operation. measurement errors in systems.
Electromagnetic compatibility tests and measurements are performed in all laboratories. our organization also under EMC tests conducts harmonic collision tests in accordance with the relevant regulations, standards and test methods published by domestic and foreign organizations. These standards are based on a few standards:
- Electromagnetic compatibility (EMC) - Part 61000-3: Limit values - Limit values for harmonic current emissions (device input current per phase ≤ 2 A) TS EN 3-2-16
- TS EN 61000-3-3 Electromagnetic compatibility (EMC) - Part 3-3: Limit values - Voltage fluctuations in low-voltage supply systems, voltage fluctuations for devices with rated current up to and including 16 A per phase (included) and not subject to conditional connection and flicker borders
- Electromagnetic compatibility (EMC) - Part 61000-4: Test and measurement techniques - Harmonics and intermediate harmonics including energy network signaling at the AA energy end - Low frequency immunity tests
Our institution, from the ÖSAS Accreditation Institution, Accredited according to TS EN ISO / IEC 17025 standard.