Yokogawa WT1803 Power Analyzer

Yokogawa WT1803 High Performance Power Analyzer
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Voltage and current frequency bandwidth 5 MHz (-3 dB, typical)
Faster switching frequencies increasingly require measurements in a wider range. The WT1800 provides a voltage and current frequency bandwidth (5MHz) 5-fold wider than the previous measurement range and is capable of more correctly capturing fast switching signals.


Reduction of low power-factor error to 0.1% of apparent power (2/3 of previous model)
A power-factor error is one of the important elements to ensure high-accuracy measurements even at a low power factor. The WT1800 has achieved a power-factor error (0.1%) that is 2/3 of the previous model, in addition to a high basic power accuracy of ±0.1%.


Wide voltage and current range allowing direct input
Direct input of measurement signals makes it possible to measure very small current that can hardly be measured with a current sensor. The WT1800 provides a direct input voltage range from 1.5 V to 1000 V (12 ranges) and a direct input current range from 10 mA to 5 A (9 ranges) or from 1 A to 50 A (6 ranges).


0.1 Hz low-speed signal power measurement and max. 50 ms high-speed data collection
The frequency lower limit has been reduced to 0.1 Hz from the previous 0.5 Hz (5-fold lower than the previous model) to meet the requirement for power measurements at a low speed. Furthermore, high-speed data collection at a data update rate of up to 50 ms has been inherited. In addition to normal measurement data, up to the 500th order harmonic data can be measured and saved simultaneously. The data update rate can be selected from nine options from 50 ms to 20 s. * Harmonic measurement at the 50 ms data update rate is possible up to the 100th order.


Particular voltage and current range selectable
Wide voltage and current input ranges have the advantage of extending the measurement application range. However, the downside is that the response time of the auto range tends to slow down. A range configuration function solves this problem. Since only the selected range (effective measurement range) can be used, the range can be changed up or down more quickly.

The WT1803 is part of the Yokogawa WT1800 high performance power analyzer series.


03 Three Input Elements 50A/50A/50A
12 Three Input Elements 5A/50A/50A
21 Three Input Elements 5A/5A/50A
30 Three Input Elements 5A/5A/5A
AUX Auxiliary Sensor Inputs
B5 Built-in printer
D UL/CSA Standard Power Cord
DA 20-channel DA Outputs
DT Delta Computation
EX3 External current sensor input for WT1803
F VDE Standard Power Cord
FQ Add-on Frequency Measurement
G5 Harmonic Measurement
G6 Simltaneous Dual Harmonic Measurement
H GB Standard Power Cord
HC Chinese menu
HE English menu
HG German menu
HS High speed data capturing
MTR Motor Evaluation Function
Q BS Standard Power Cord
R AS Standard Power Cord
V1 RGB output