Power Quality Consulting Service

A set of three phasors, such as three-phase voltages or currents, is balanced if all phasors have the same magnitude and are phase-shifted symmetrically by 120-degrees to each other. Any deviation of the magnitudes and/or phase-shifts from these conditions causes the considered set of phasors to be unbalanced.

Electric power quality is the degree to which the voltage, frequency, and waveform of a power supply system conform to established specifications. Power quality can thus be defined as a steady supply voltage that stays within the prescribed range, steady AC frequency close to the rated value, and smooth voltage curve waveform (which resembles a sine wave). In general, it is useful to consider power quality as the compatibility between what comes out of an electric outlet and the load that is plugged into it.

Phase unbalance might sound like an unexciting, nerdy measurement of electrical power supply quality and of little interest to anyone except for a few electrical engineers. But in fact, phase unbalance is important to maintenance engineers for several reasons. It can cause significant additional mechanical stresses on the shafts motors and even generators which is because of the torsional oscillations that the unbalanced voltages and current create. It can therefore shorten the life of the motors.

Agulhas offers a professional Power Quality Assessment and Consulting Service. First, we install our sophisticated Power Quality Monitor device to record a whole spectrum of electrical power quality measurements. This is then followed by a comprehensive analysis of the data. Should we find any discrepancies from the norm, we will consult with you and discuss any further actions to be taken.

With the Voltage Transducers, we can, for instance, set the instrument to use the 88000:110V voltage transformers to record the 88kV values and Current Transducers to use the 400:5A current transformers to record the actual primary currents. See the details below.

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Voltages L1, L2, L3, N (four measurement inputs) – average, minimum, maximum, and instant values within the range up to 760 V, interoperability with voltage transducers.
Currents L1, L2, L3, N (four measurement inputs) – average, minimum, maximum, and instant values, current measurement within the range up to 6 kA (depending on applied current clamp), interoperability with current transducers.
Crest factors for current (CFI) and voltage (CFU).
Frequency within the range of 40 Hz – 70 Hz.
Active power (P), reactive power (Q), distortion power (D), apparent power (S) with identification of the nature of reactive power (capacitive, inductive).
Calculation of reactive power using the Budeanu method and IEEE 1459 method.
Active energy (EP), reactive energy (EQ), apparent energy (ES).
Power factor (PF), cosφ, tanφ.
Harmonics up to the 40th in voltage and current.
Total harmonic distortion THD for current and voltage.
Short-term (PST) and long-term (PLT) light flicker index.
Unbalance of voltages (in compliance with IEC 61000-4-30 class S) and currents.
Event logging for current and voltage along with oscillograms and half-period RMS charts.
All parameters are registered in compliance with class S according to standard EN 61000-4-30.

Reasons For Using Our Service

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Analyzer Overview

Specific Features of Our Instrument

The Measured Parameters We Can Record

Wide Range of Mains to Analyze