Yokogawa WT1800E High Performance Power Analyzer

Yokogawa WT1800E High Performance Power Analyzer

Product Overview:

The WT1800E is a flexible and reliable power analyzer that guarantees power accuracy of 0.05% of reading plus 0.05% of range. It is capable of harmonics analysis up to the 500th order of a 50/60 Hz fundamental frequency. With up to 6 input channels, a wide range of display and analysis features, and PC connectivity, the WT1800E can handle broad variety of power efficiency and harmonic analysis requirements.

 

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The WT1800E guarantees a power accuracy of 0.05% of reading plus 0.05% of range and is capable of harmonics analysis up to the 500th order of a 50/60 Hz fundamental frequency. With up to 6 input channels, a wide range of display / analysis features, and PC connectivity, the WT1800E is the measurement solution for a broad range of power efficiency and harmonic analysis applications.

  • Basic power accuracy:
    • 0.05% of reading
    • 0.05% or range
  • Harmonics analysis up to the 500th order of a 50/60 Hz fundamental frequency
  • Up to 6 input channels at 2 MS/s (16 bits)

6 inputs on a high resolution display

Make simultaneous measurements on up to 6 inputs at 2 MS/s (16 bits). The high resolution 8.4 inch XGA display of the WT1800E allows split screen viewing of up to 6 waveforms and can display up to 12 pages of diverse measurement parameters making it ideal for efficiency tests of inverter driven motors, renewable energy technologies and traction applications like pumps, fans and hybrid/electric vehicles. The unit can also display measurements in vector format or trending in time.

WT1800E High Resolution Display

Guaranteed accuracy across a wide range

Measure accurately at a wide range of voltage, current and frequency conditions. The basic power accuracy of the WT1800E is guaranteed between 1% to 110% of the selected voltage and current range. This equates to voltages from 15 mV to 1100 V rms and currents from 0.1 mA to 5.5 A rms (for a 5 A input element) and 10 mA to 55 A rms (for a 50 A input element). The unit is also accurate during large phase shifts and high frequencies thanks to the minimized influence of the low power factor error (±0.07% of apparent power).

Range configuration

Track signal changes faster by eliminating unnecessary range changes. The WT1800E’s range configuration function allows users to select input ranges based on their specific use cases so that optimal range settings are achieved quicker. This reduces the time during repetitive production tests, such as setting to OFF, 100 V, OFF and so on, which is performed frequently on the production line.

Harmonic analysis

Analyze harmonics up to the 500th order for a 50/60 Hz fundamental even at a data update interval of 50 milliseconds. The WT1800E features two options for analyzing harmonics in addition to power parameters.

  • Harmonic measurement mode (/G5 option) for fundamental wave, harmonic components and total harmonic distortion (THD)
  • Dual Harmonic option (/G6 option) for side by side measurement of harmonics on two different sources for example input and output of inverters, variable speed motors, lighting ballasts, UPS, etc.
WT1800E Harmonic Analysi

    Power integration and auto ranging

    Measure energy bought / sold in grid connections or charged / discharged in batteries. The WT1800E’s Power integration function integrates instantaneous values for both positive and negative readings. It also measures total energy (Wh) and current (Ah) when load conditions vary widely such as in devices transitioning from standby to operation mode. Should an input signal start to fall out of the expected range, this function can automatically adjust the range while continuing to integrate the measured values.

    High speed data capture

    The High Speed data capturing function can measure Sigma-Urms, Sigma-Irms and Sigma-P from DC signal and three phase devices every 5 ms when External Synchronization is OFF. It can also update at 1 ms to 100 ms when External Synchronization is ON depending on the frequency of the clock signal.

    Flexible & automatic data updates

    Manually or automatically set measurement intervals. The WT1800E offers 9 data update interval between 50 ms to 20 s but can also follow fluctuating input frequencies by changing the data update rate automatically. This is useful when measuring devices like motors whose input signal frequency varies with RPM.

    WT1800E Flexible

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

    The WT1800E can be equipped with a DC power supply for the CT series of AC/DC current sensors. By using dedicated connection cables and shunt resistors, the WT1800E can measure large currents. Improved S/N ratio and noise immunity is achieved by connecting the sensors in this way.

    WT1800E Flexible 2

    * /EX option must be installed in the WT1800E to be able to use the Shunt Resistor Box.

    Motor evaluation function

    Measure more than just electrical parameters. The motor evaluation function enables measurement of rotation speed and direction, torque, mechanical power, synchronous speed, slip, electrical angle, motor efficiency and total system efficiency from the analog or pulse outputs of rotation and torque sensors.

    WT1800E Motor Evaluation Function

     

    WTViewerEfree application software

    Easily view, control and download measurements from your PC. The WTViewerEfree is free software that connects the WT1800E to a PC via a communications interface making numeric, waveform, trend and harmonic data easily accessible via PC.

    WT1800E WTViewerEfree Application Software

    User defined events and computations

    The event trigger function of the WT1800E allows users to set limits for capture of readings that fall into or out of a specific range of power, current or other parameters. Data that meets the trigger conditions are stored, printed, saved to a USB memory device etc. Users can also define and use up to 20 expressions for custom calculations.

    Example of basic characteristics showing the WT1800E’s high precision and excellent stability

    WT1800E Example Of Frequency Versu Power Accuracy Characteristic At Unity Power Factor

    Example of frequency versus power accuracy characteristic at unity power factor

    Example Of Effect Of Common Mode Voltage On Reading

    Example of effect of common mode voltage on readings

    WT1800E Total Power Error With Rated Range Input For An Arbitrary Power Factor 50 60 Hz

    Total power error with rated range input for an arbitrary power factor (50/60 Hz)

    WT1800E Example Of Frequency Versu Power Accuracy At Zero Power Factor

    Example of frequency versus power accuracy at zero power factor

     

     

    Applications

    The WT1800E is a versatile instrument, unlocking precision power measurement capabilities for researchers, designers and engineers working on a wide variety of applications in energy efficiency and conservation and renewable energy. Whether it is for the manufacture of energy efficient devices and appliances, hybrid/electric vehicles or renewable energy technologies, the WT1800E is a universal meter for power electronic measurements and energy analysis. Key applications include:

    • Electric, Hybrid Electric and Plug-in Hybrid Electric Vehicles
    • Industrial equipment such as Inverters, Motors and Pumps
    • Renewable energy technologies such as Solar and Wind power
    • Office and Home appliances like Air conditioners and Refrigerators
    • IT Data center equipment like Servers, Routers and Switches
    • Battery charging and Portable devices
    • Ballasts, LEDs & Fluorescent lighting
    • Aircraft Power systems

    Inverter and motor testing

    WT1800E Inverter Motor Testing

    Overview

    Electric and hybrid vehicles have many electrical and mechanical components and therefore an overall performance evaluation requires the efficiency measurement of both. With 6 channels of power inputs, flexible operation and a wide bandwidth, the WT1800E is ideal for efficiency tests between the input and output of inverters. An optional motor evaluation function enables the measurement of rotation speed and changes in torque.

    WT1800E Phase

    Delta computation

    Obtain the line and phase voltages from the sums and differences of the instantaneous values of voltage and current in each element.

    • Line voltages and phase currents that are not measured are computed in the three-phase three-wire system (Figure 1).
    • Star-delta conversion: Line voltage is computed from the phase voltage using the three-phase four-wire system data.
    • Delta-star conversion: Phase voltage is computed from the line voltage in the three-phase three-wire system (3V3A system) (Figure 2).

    The WT1800E advantages


    Wide bandwidth and High speed sampling

    The WT1800E is capable of 16-bit high resolution and 2 MHz sampling making it possible to measure faster signals with higher precision.

    Motor evaluation: Electrical angle/rotation/ direction

    Measure rotation speed, torque, and output (mechanical power) of motors from analog/pulse inputs of rotation or torque sensors.

    Harmonics and dual harmonics

    Simultaneously measure distortion factors like THD, fundamental and harmonic components. Harmonics up to the 500th order can be measured even at 50 ms data update rate. Users can also measure harmonics on two different sources simultaneously.

    Battery charge/discharge measurements

    In integrated measurement, the battery charge and discharge can be evaluated. Instantaneous positive and negative values captured at a high-speed sampling rate of 2 MS/s are integrated.

    Line filter to remove high frequency components

    In the power evaluation of inverter waveforms, measurement values are affected by high frequency components. A digital filter function makes it possible to remove unnecessary high frequency components superimposed on signals. The filter can be independently set for each input element. An analog filter for 1 MHz/ 300 kHz, and a digital filter that can be set from 100 Hz to 100 kHz in increments of 100 Hz are available as standard.

    Efficiency of renewable energy systems

    WT1800E Power Flow Of Photovoltaic Power

    Overview

    Energy generated by photovoltaic cell modules and wind turbines is converted from DC to AC by a power conditioner. Minimizing losses in these conversions improves the efficiency in the overall energy system. The WT1800E provides up to 6 power inputs per unit for measuring voltage, current, power, and frequency (for AC) before and after each converter, as well as the converter and charging efficiencies.

    WT1800E Typical Voltage Curret And Power

    Measuring instantaneous peak power

    In photovoltaic power generation, an MPPT control varies the voltage to maximize energy harvested from the solar panel. The WT1800E can measure not only the voltage, current, and power but also the voltage, current, and power peak values for both plus (+) and minus (−) sides.


    The WT1800E advantages


    Multiple channels and wide input range

    Evaluate Power conditioner efficiency using 6 input channels for simultaneous measurements from the inputs and outputs of boost converter, inverter, and storage battery. Direct input terminals (voltage range: 1.5 V to 1000 V and current range: 10 mA to 5 A or 1 A to 50 A) make it possible to perform high-precision measurements without using a current sensor.

    Harmonic distortion factor measurement

    Voltage fluctuations and harmonics flow into the power system due to reverse power flow. A harmonic measurement function enables measurement of harmonic components to compute and display total harmonic distortion (THD).

    Ripple factor and power loss measurements

    A user-defined function makes it possible to compute power loss, DC voltage and DC current ripple factors between the input and output. Up to 20 arithmetic expressions can be set. Display names for the arithmetic operations F1, F2, and so on can be freely changed.

    Typical arithmetic expressions

    1. DC voltage ripple factor = [(Voltage peak value (+) – Voltage peak value (−))/2 × DC voltage value (mean)] × 100
    2. Power loss = Output power – Input power

    Energy bought/sold and charged/discharged

    Measure the amount of power sold/bought in grid interconnection and of battery charge/discharge. Measure the amount of power sold/ bought in grid interconnections and in battery charge/discharges. The WT1800E enables the integration of current (q), apparent power (WS), reactive power (WQ), as well as the effective power integration in sold/bought power and charge/discharge modes. Furthermore, a user-defined function makes it possible to calculate the Average active power within the integration period.

    Efficiency of inverter-motor in electric vehicles

    WT1800E Inverter Motor In Electrical Vehicle

    Overview

    The WT1800E supports power measurements on up to 6 input channels making it ideal for evaluating the efficiency between the input and output of an electric vehicle. An optional motor evaluation function makes it possible to simultaneously monitor voltage, current, and power changes, as well as changes in rotation speed, torque and mechanical power.

    WT1800E Typical Repetitive High Speed Charging

    Battery charge/discharge measurements

    In integrated measurement, the battery charge and discharge can be evaluated. Instantaneous positive and negative values captured at 2 MS/s high-speed sampling rate are integrated, and each of the total values is displayed.


    The WT1800E advantage


    Wide bandwidth and High speed sampling

    The WT1800E is capable of 16-bit high resolution and 2 MHz sampling making it possible to measure faster signals with greater precision.

    Harmonics and dual harmonics

    Motor testing is performed at various rotation speeds. The WT1800E supports a lower limit frequency of 0.1 Hz to enable measurement of harmonics at a very low motor rotation speed without using an external sampling clock.

    Motor evaluation: Electrical angle/rotation/direction

    Measure rotation speed, torque, and output (mechanical) power of motors from analog/pulse outputs of rotation or torque sensors.

    Individual null function: offset correction for each input

    A common problem when testing inverter motors is the presence of ambient noise that can mean test values are non-zero even before testing begins. The WT1800E’s null function allows users to enable, disable or reset the offset values for voltage, current and motor input signals of each element separately.

    DA output and remote control

    Users may want to check changes in data, along with other measurement data (temperature, etc.) at the same time that communication data, such as voltage, current, power, and efficiency are required. A DA output function allows users to generate analog signals on up to 20 channels.

     

     

    Interfaces & Connections

    WT1800E Front Connection Interface

    Standard Features Optional Features
    1. External media slot
    2. Element Setting
    3. U/I range display
    4. Display Settings
    5. Measurement item selection
    6. Integration Settings
    7. Data saving
    1. Built-in printer (/B5 Option)
    2. Current Sensor Power (/PD Option)

    WT1800E Back Connection Interface

    Standard Features Optional Features
    1. Voltage input terminals
    2. Current input terminals
    3. GP-IB port
    4. BNC connector for two-system synchronized measurement
    5. Ethernet port (1000BASE-T/100BASE-TX)
    6. USB port (PC)
    1. External current sensor input terminals

      (/EX Option)
    2. Torque and speed input terminals

      (/MTR Option)
    3. D/A output (/DA Option)
    4. RGB port (/V1 Option)

    Two types of input element

    Basic Power Accuracy: ±(0.05% of reading + 0.05% of range)*1

    Measurement Bandwidth: DC, 0.1 Hz to 1 MHz

    Low Power Factor Error: Power factor influence when cosø = 0

    1. 0.07% of S 

      S is reading value of apparent power 

      ø is phase angle between voltage and current

    Temperature range: 23 ±5˚C

    Current Range:

    • Direct Input: 1/2/5/10/20/50 A*2
      • 10/20/50/100/200/500 mA, 1/2/5 A*2 (50 A and 5 A input element can be installed together)
    • External Input: 50/100/200/500 mV, 1/2/5/10 V*2

    Voltage Range: 1.5/3/6/10/15/30/60/100/150/300/600/1000 V*2

    Effective input range: 1% to 110%

    Data Update Interval: 50 ms to 20 s or Auto

    *1 Please refer to “specifications” in detail

    *2 Voltage range and current range are for crest factor 3

    WT1800E Input Module

    Both 5 A and 50 A input elements can be installed in a single unit. This enables engineers to use a single WT1800E for multiple applications such as standby power measurement and the evaluation of various operating modes of the device under test.