High Performance Power Analyzer WT1800R Series

general situation

accurate

In its class of power analyzers, the WT1800R guarantees power accuracy of "0.05% of reading + 0.05% of range", and it can perform up to 500 harmonics analysis (50/60Hz fundamental frequency).

reliably

Measurements need to be repeated and accuracy is required, the WT1800R is extremely stable and ensures that accurate measurements are made now and in the future.

versatile

With up to 6 input channels, a wide range of display and analysis functions, and the ability to connect to a PC, the WT1800R offers customers a wide range of measurement solutions in the field of power efficiency and harmonic analysis.

brief

High resolution display of 6 input channels

Simultaneous measurements of up to six input channels can be performed at a sampling rate of 2 MS/s (16 bits). The WT1800R has a high-resolution 8.4-inch XGA display that allows up to six sets of waveforms to be viewed in split-screen and displays up to twelve pages of different measurement parameters, which makes it ideal for efficiency testing in inverter-driven motors, renewable energy technologies, and traction applications (hybrid/electric vehicles, pumps and fans, etc.). This makes the WT1800R the ideal tool for efficiency testing in inverter drive motors, renewable energy technologies and traction applications (hybrid/electric vehicles, pumps and fans, etc.) The WT1800R can also display measurement results as a vector or trend graph.

Ensures accuracy over a wide range

The WT1800R can accurately measure voltage, current, and frequency over a wide range.The WT1800R's basic power accuracy (for AC measurements) can be 1 % ~ 1 1 0 % of the selected voltage range and current range. This corresponds to the ability to accurately measure voltages of 15mV ~ 1100Vrms, currents of 0.1mA ~ 5.5Arms (5A input unit) and 10mA ~ 55Arms (50A input unit). Since the effect of low power factor error is minimized (apparent power ±0.07%), the WT1800R ensures measurement accuracy even under large phase shift and high frequency conditions.

Two input units

The 5A and 50A input units can be mounted on a single instrument. In this way, engineers can perform multiple applications using a single WT1800R. For example, evaluation of the device under test in standby mode and multiple operating states, etc.

Flexible & Automatic Data Updates

The measurement period can be set manually or automatically. Nine data update cycles can be set between 50ms~20s, or the data update rate can be changed automatically following fluctuations in the input frequency. Since measurements can be made from a low frequency of 0.1Hz, stable measurements can be made even during low-speed operation of the motor. In addition, during low-speed operation (when the WT1800R's input frequency is 20Hz or less), data is updated once per cycle. This helps to check the measurement results for each motor revolution.

harmonic analysis (physics)

Even with a data update period of only 50ms, the WT1800R can analyze up to 500 harmonics at a fundamental frequency of 50/60Hz. In addition to power parameters, the WT1800R offers two options for harmonic analysis.

• Harmonic measurement mode (/G5 option)
  For analyzing fundamental, harmonic components and total harmonic distortion (THD)
• Double harmonic analysis (/G6 option)
  Used to measure harmonics from two different sources, such as the input and output of inverters, variable speed motors, lighting ballasts, UPS, etc.

Motor Evaluation Function

The WT1800R not only measures electrical parameters, but with the motor evaluation function option installed, it also measures speed/direction, torque, mechanical power, synchronous speed, slip, electrical angle, motor efficiency and total system efficiency with the analog and pulse outputs of the torque speed sensor.

Magnetic field orientation control measurements

Permanent magnet synchronous motors (PMSM) have the highest efficiency compared to other types of motors and are typically controlled using the dq axis parameter (rotating coordinate system.) The WT1800R has enhanced calculation capabilities to calculate Ld and Lq and supports the measurements required for PMSM control.

DC power supply for AC/DC current sensors (/PD2 option)

The WT1800R is equipped with a DC power supply for the AC/DC current sensor CT series. By using a dedicated connection cable and shunt resistor box, the WT1800R can measure large currents. Connecting the sensor in this way improves the signal-to-noise ratio and immunity to interference.

High-speed data acquisition

With the high-speed data acquisition function, the Sigma-Urms, Sigma-Irms, and Sigma-P of DC signals and three-phase devices can be calculated every 5ms (external synchronization is set to OFF) or 1ms~100ms (external synchronization is set to ON) depending on the frequency of the clock signal.

Example of three-phase current measurement data (red dots are examples of data measured at 5ms intervals)

Easy loading of personalized measurement screens from internal memory

Customized screen displays allow visual confirmation of the parameters to be measured. Customized screens can be loaded from non-volatile internal memory for easy display.

^* The internal memory can also be used to store numerical data and other data. The capacity is 1GB.

Easily understand the correlation between power consumption and inverter waveforms

When efficiency degradation is observed during continuous motor operation testing, a combination of high-precision power measurements and waveform measurements can be used to understand the correlation to determine the cause.
YOKOGAWA's integrated measurement software platform, IS8001/IS8002, coaxially displays the results of high-precision power measurements using the WT1800R and waveform measurements from a DL950 high-speed data logger or a DLM5000-series oscilloscope to provide an understanding of the correlation between power consumption and inverter waveforms on a single screen.^*1

WTViewerEfree application

Measurement results can be easily viewed, controlled and downloaded using a PC.
WTViewerEfree is a powerful software that connects the WT1800R to a PC via a communication interface, allowing easy access to numerical, waveform, trend and harmonic data on the PC.