ibaPQU-S is a modular system to measure power quality parameters using ibaPQU-S as central unit.

ibaPQU-S measures raw values such as current and voltage in sync with the grid and calculates the characteristic values according to IEC 61000-4-30 Ed. 3 Class A. Characteristic values include:

• Frequency

• RMS and maximum value, rectified value, form factor, crest factor

• FFT (harmonics, interharmonics up to 50th order)

• THD (Total Harmonic Distorsion)

• Phase values (U/I phase angle to the reference voltage)

• Power values (active power, apparent power, reactive power, cos θ, electric energy, power factor for individual lines and for the total grid)

• Symmetrical components (positive, negative and zero sequence component) and current unbalance

• Flicker (according to IEC 61000-4-15, short-term, long-term)

• Event detection (voltage dip, voltage swell, voltage interruption, rapid voltage changes, mains signalling event)

In addition, ibaPQU-S calculates the following values:

• Commutation notches

• Flicker for currents

• Symmetrical components (positive, negative and zero sequence component) and current unbalance

ibaPQU-S is suitable for the following grids:

• DC

• 50 Hz

• 60 Hz

• User-defined networks with a frequency between 10 and 80 Hz