This new addition to Yokogawa’s highly recognized digital power analyzer product line offers innovative measurement functions which benefit the engineer with electrical power measurements. It is the ideal measurement solution for testing Product Efficiency, and the design of Inverters, Motor Drives, Lighting Systems, Uninterruptible Power Supplies, Aircraft Power Systems, Transformer Testing and other power conversion devices. What’s New

Released firmware Version 2.25

Bulletin WT1800-00EN

Voltage and current frequency bandwidth 5 MHz (-3 dB, typical)
Reduction of low power-factor error to 0.1% of apparent power (2/3 of previous model)
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.

• Comparison with Yokogawa’s previous model WT1600
  *1: Applicable to a general-purpose high-precision three-phase power analyzer as of February 2011 (according to Yokogawa’s survey).
  Support for Energy Conservation Technologies and Sustainable Energy Development

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