Power Product of the Year
Product Name: Yokogawa WT5000 Precision Power Analyzer – Transformer Version
Company: Yokogawa
Entry Statement
As the world shifts from fossil fuels to an economy based more on electricity, demand for this power source is set to soar to as much as 40 TWh by 2040. To avoid wasting electrical power, minimizing losses in the network never been more important.
Transformers play a key role, so owners of distribution networks are keen to ensure they are as efficient as possible. They will often impose penalties on transformer manufacturers according to the degree of losses measured during the no load test. With penalties often exceeding 13,000 EUR per kilowatt, including the measurement uncertainty, transformer manufacturers have a major incentive to measure these losses accurately and with minimum uncertainty.
The Yokogawa WT5000 Precision Power Analyzer – Transformer Version has been designed to help manufacturers achieve the highly accurate analysis needed to develop economical and efficient transformers. As such it, it plays a key role in building trust with power utility companies.
Equipped with a special input module that has much better uncertainty specifications for transformer testing, the WT5000 Precision Power Analyzer -Transformer Version is Yokogawa’s most accurate power analyzer yet. It offers an accuracy of 0.008% at unity power factor and provides the best accuracies at low power factors for commercial frequencies of 45 to 66 Hz.
With low power factors having a dramatic effect on accuracy, the instrument offers accuracy of 0.6% of the reading for measurement, even at a power factor as low as 0.001 at 100 V and 1 A.
The WT5000 Precision Power Analyzer – Transformer Version is optimized by ISO17025 accredited calibration at 53Hz at power factors of 1, 0.5, 0.05, 0.01 and 0.001. Additional calibration up to 100 kHz ensures performance when measuring distorted waveforms, for example during no-load loss current measurements of transformers. This enables the integrated transformer measurement system to measure power losses with great accuracy and capture any drift outside the limits described in the IEC60076-8 Standard.
Using the WT5000 Precision Power Analyzer – Transformer Version, engineers can measure either three or four different power phases at 10 MS/s (18 bits). The high resolution, 10.1-inch WXGA display allows split screen viewing of up to seven waveforms and can display up to 12 pages of measurement parameters.
With the WT5000’s three-phase delta calculation, engineers can check line voltage and phase voltage simultaneously without changing wiring. The built-in delta computation function allows both star-delta and delta-star conversion, allowing users to calculate individual phase voltages from the line voltages measured in a three-phase, three-wire (3V3A) system.
Development engineers can also evaluate and compare input and output harmonics of inverters, motors, or power conditioners up to the 500th order. The WT5000 offers advanced harmonic analysis, As well as measuring harmonics and power simultaneously, it also offers side-by-side comparison of harmonics from two different input sources.
In addition to low pass frequency filters and line filters, the WT5000 features advanced filtering capabilities, allowing the analysis of even the most challenging of waveforms with precision.
Whether during R&D, production, or acceptance testing, the WT5000 Precision Power Analyzer – Transformer Version produces the reliable measurements that engineers need as they seek to improve transformer efficiencies and verify the losses to reduce the total cost of ownership for utility companies.
