Precision power analyser offers 0.05% accuracy, extended harmonics

September 14, 2016 // By Graham Prophet
Yokogawa Europe's WT1800E power analyser has been designed to extend accuracy and flexibility in power measurement across a broad range of applications, including energy efficient devices and appliances, plug-in hybrid/electric vehicles, lighting, aircraft and for renewable energy technologies. It allows accurate comparisons of the input and output of motors, inverters, actuators, energy recovery systems and generators.

Increased flexibility comes with the WT1800E's six channels which means it can accommodate three-phase systems and other applications requiring multiple input channels. Energy saving circuits employ high frequency switching techniques which challenge the accuracy of power analysers. The WT1800E has been designed to retain its outstanding accuracy at and beyond these frequencies, analysing multiphase inputs during motor and drive design or meeting the efficiency standards of photovoltaic inverters.


Key features of the WT1800E include:

- Accuracy; guaranteed power accuracy of 0.05% of reading plus 0.05% of range

Capable of harmonics analysis up to the 500th order of a 50/60 Hz fundamental frequency

Accuracy can be further improved with calibration at Yokogawa's ISO 17025 accredited lab.

- Reliability; high levels of stability mean that measurements are consistent when repeated over the lifetime of the instrument.

- Flexibility; up to 6 input channels, with a wide range of display and analysis features

  • PC connectivity.


Terry Marrinan, VP of sales and marketing at Yokogawa Europe BV, comments, “[Engineers] are increasingly having to ask themselves ‘How accurate are my power measurements?..We guarantee the power accuracies of our analysers over their full ranges and specify the effects of all the other factors such as power factor, crest factor, phase angle error, temperature range, warm-up time, stability period and common mode rejection.”