Offering the world’s highest level of power measurement accuracy, the WT3000E provides engineers with a solution for testing and verifying Product Efficiency to the highest levels. Advanced and innovative measurement functions will benefit the engineer with electrical power measurements. It provides the measurement solutions necessary in the design and testing of the latest products such as Solar Inverters, Motor Drives, Lighting Systems, Uninterruptible Power Supplies, Transformer Testing, Aircraft Power Systems, and other power conversion devices.

With basic power accuracy of ±0.01% reading, DC and 0.1 Hz-1 MHz measurement bandwidths, and up to four input elements, the WT3000E provides higher-accuracy measurement of I/O efficiency.

  • Basic power accuracy: 0.01% of reading
  • Both 2 A and 30 A input elements can be installed in a single unit
  • Good readability: The large, 8.4-inch LCD and the range indicator LEDs
  • Simultaneous measurement with 2 units (8 power input elements)
  • Store function: 50 ms data storing interval
  • Interface: GP-IB, Ethernet, RS-232 and USB
  • Advanced computation function: Waveform computation, FFT analysis, waveform sampling data saving.
  • The latest IEC61000-3-2 and IEC61000-3-12: Harmonic measurement
  • The latest IEC61000-3-3 and IEC61000-3-11: Voltage fluctuation / flicker measurement
Yokogawa’s highest-precision power analyzer

The WT3000E has the highest precision of all the Yokogawa power analyzers in the WT series. The models in the WT series are designed to meet a wide variety of user needs. The WT300/WT500 series is a high price-performance series which is very popular in production line applications. The WT1800 allows measurement data to be viewed in a variety of ways, including numerical value display, waveform display, and trend display capabilities.
WTFamily 3

Reading error

Select the model most suited to your measurement needs

  • High accuracy and wide frequency range
    Basic power accuracy
    ±(0.01% of reading + 0.03% of range)
    frequency range
    DC, 0.1 Hz to 1 MHz
  • Low power factor error
    Power factor error when cosø=0
    0.03% of S
    S is reading value of apparent power
    ø is phase angle between voltage and current
  • Current range
    Direct input
    0.5/1/2/5/10/20/30 [A] or 5/10/20/50/100/200/500 [mA], 1/2 [A]
    *2A and 30A input elements can be installed together in a unit.
  • External input50m/100m/200m/500m/1/2/5/10 [V]*
  • Voltage range
    15/30/60/100/150/300/600/1000 [V]
    * Voltage range and current range are for crest factor 3

    • 1000 [Vrms] Continuous maximum common mode voltage (50/60 Hz)
    • Data Update rate: 50 ms to 20 sec
    • Effective input range: 1% to 130%
    • Simultaneously measurement with 2 Units

Rear Panel

Wt30000E rear Panel

Standard Features Optional Features
  1. Voltage input terminals
  2. External current sensor input terminals
  3. Current input terminals
  4. GP-IB port
  5. BNC connector for two-system synchronized measurement
  1. Serial (RS-232) port (option/C2) or USB port (PC) (option/C12)
  2. Ethernet port (100BASE-TX/10BASE-T) (option/C7)
  3. VGA port (option/V1)
  4. D/A output (option/DA)
  5. Torque and speed input terminals (Motor Evaluation Option)


Example of basic characteristics showing the WT3000E’s high precision and excellent stability


Delta Calculation Function

Checking phase voltage when you measure line to line voltage

This function allows you to calculate individual phase voltages from the line voltage measured in a threephase, three-wire (3V3A) system. R-S line voltage can be calculated in systems measured from a three-phase, three-wire method (using two elements). This is useful when you want to determine the phase voltage in motors and other items under test with no neutral lines. Line to line voltage and phase current (measurements equivalent to 3V3A) can be estimated in systems not measured from a three-phase, three-wire configuration (using two elements).  Wt3delta

Cycle-by-cycle Measurement Function

With fluctuating data occurring when connecting to interconnected systems, or with motor evaluation*, in certain circumstances you may need to capture rapidly changing phenomena (such as during load fluctuations in a motor). These tasks can be handled effectively with the cycle-by-cycle measurement function. The function takes measurements of parameters such as voltage, current, and active power for each cycle, then lists the data on screen in a time series. Up to 3000 data (measurements of signals from 0.1 Hz to 1000 Hz) can be saved in CSV format.
* Requires the motor evaluation option (/MTR)

Example of calculation with the cycle-by-cycle function



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