WT5000 Precision Power Analyzer

Superb accuracy has never been easier, thanks to multi-channel measurements, custom triggers and computations, advanced harmonic analysis and filtering, and user-friendly operation. The Yokogawa WT5000 precision power analyzer is a versatile platform that delivers extraordinary precision and exceptional performance for the most demanding applications. Equipped with seven user swappable and reconfigurable input elements plus four motor channels, the WT5000 high accuracy power meter is an ideal instrument for electrical and mechanical power and efficiency measurements. The Yokogawa power analyzer is now listed as an accepted device for SPEC Power® testing and IEC harmonic and flicker standards. Its out-of-the-box software solution, highly responsive touchscreen, and intuitive menu operations for simple connection, configuring, and use make the WT5000 an ideal instrument for your testing needs.

Awards

Test Product of the Year

The WT5000 was awarded "Test Product of the Year" at the 2019 Elektra Awards.

Test Product of the Year

Power Product of the Year

Yokogawa's WT5000 Precision Power Analyzer won the prestigious “Power Product of the Year” trophy at the second annual Electronics Industry Awards.

Power Product of the Year

 

Reliable Today, Ready for Tomorrow

  • Make measurements you can trust with a guaranteed accuracy of *0.03%
  • 10MS/s, 1MHz power bandwidth, 18 bit resolution enabled by Yokogawa isoPRO™ fiber optic isolation technology
  • Simultaneously analyze 7 phases with one chassis, producing over 1000 power parameters real-time
  • Precision current measurement guaranteed by innovative symmetric coaxial shunt design
    *basic power accuracy
  • Stream raw waveform data up to 22 items at a rate of up to 2 MS/s for detailed waveform analysis

WT5000

Innovate with Precision, Flexibility and Confidence

  • Modular architecture with 7 user swappable and reconfigurable input elements
  • High-accuracy element, built-in DC power supply, enables both easy wiring and reliable high-precision, large-current measurements
  • Up to 10ms data update, up to 50ms data update when using data streaming
  • Follows frequency fluctuations in input signals by auto update mode
  • Synchronize multiple chassis for large multi-phase systems
  • For motors and generators up to 4 speed and torque inputs** can be used measuring total system efficiency
  • Isolate and measure harmonic losses with configurable advanced filtering for simultaneous wideband and harmonic power analysis
    **can be configured as auxiliary inputs
  • Stream raw waveform data up to 22 items at a rate of up to 2 MS/s for detailed waveform analysis

WT5000_back

Flexibility and Confidence

Precision Made Easy

  • Highly responsive 10.1 inch electrostatic capacitive touch screen
  • Intuitive and easy menus to connect, configure, measure and record
  • Modular interconnect design putting safety first

WT5000

Precision Made Easy

Unmatched Accuracy

The WT5000 is the world’s most accurate precision power analyzer with a basic power accuracy of ±0.03%. Its accuracy specifications are guaranteed from 1% to 130% of the selected voltage and current ranges. With minimum influence of low power factor (0.02% of apparent power) the unit is also accurate at large phase shifts and frequencies.

  • AC power accuracy: 0.01% of reading + 0.02% of range
  • DC power accuracy: 0.02% of reading + 0.05% of range
  • 10 MS/s 18 bit ADC

Unmatched Accuracy

Multi-channel Measurements

Measure from up to 7 different power phases at 10 MS/s (18 bits). The high resolution, 10.1 inch WXGA display allows split screen viewing of up to 7 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 electric vehicles. Measurements are also displayed in vector format or trending in time.

Multi-channel Measurements

Multi-channel Measurements_2

Current sensor module with DC power supply

Use of the internal DC power supply for AC/DC current sensors simplifies the preparations before measurement and the measurement setup only requires the current sensor and a connecting cable. Using an external DC power supply and additional wiring is no longer required. There are three sensor connection cable lengths available; i.e., 3 m, 5 m, and 10 m.
*Firmware version 3.01 or later is required.

 

760903 電流センサーエレメント

760903 Current Sensor Element

電流センサーエレメントとAC/DC電流センサーの接続例

Example of connection to CT1000A 

 

Intuitive Operation

Operable by touch and/or hardware hot-keys independently, the WT5000 offers a seamless and intuitive experience that makes connecting, configuring and measuring easier than ever before. The 10.1 inch WXGA touchscreen delivers excellent noise immunity even in high noise environments such as motors and inverters.

Intuitive Operation

Intuitive Operation_2

Intuitive Operation_3

Additional Touch Operations

The operability of the touch panel has been improved. "Time / div" can be set by pinch / out. Also, you can flick the waveform display contents.

Additional Touch Operations

Advanced Filtering

In addition to low pass frequency filters and line filters, the WT5000 features advanced filtering capabilities that provide unprecedented control to analyze even the toughest of waveforms with precision.

  • Synchronization source filter: Instead of synchronizing to zero crossings, users can select any specific point of the synchronization source signal.
  • Enhanced frequency filter: Allows users to simultaneously measure fundamental and switching frequencies without influencing any other parameter.
  • Digital Parallel Path filters: Supported by a high frequency anti-aliasing filter, two separate line filters for normal and harmonic measurements ensures accuracy without aliasing in wide band and harmonic measurements. Users can limit the number of harmonic orders to eliminate attenuation in low bandwidth measurements.

Advanced Filtering

Advanced Filtering

Advanced Harmonic Analysis

Evaluate and compare input and output harmonics of inverters, motors or power conditioners up to the 500th order. The WT5000 allows users to not only measure harmonics and power simultaneously but also offers side by side comparison of harmonics from two different input sources.

The effects of noise and aliasing are minimized by antialiasing and line filters with Digital Parallel Path technology allowing simultaneous power analysis of wide band and narrow band components.

Advanced Harmonic Analysis

Advanced Harmonic Analysis

Harmonics Regulation Test

Combined with the /G7 option and IEC Harmonic /Flicker measurement software, the WT5000 measured harmonic data can be saved into a PC and tested according to IEC regulations. To support large equipment over 16 A/phase (IEC61000-3-12) the CT200 current sensor model can be used.

  • Harmonics: EN61000-3-2, IEC61000-3-2, EN61000-3-12, IEC61000-3-12 and JIS C 61000-3-2

Harmonics Regulation Test

Numeric and Waveform Synchronized Data

The waveform data is streamed without any gaps up to 2 MS/s and is synchronized with the numerical data. Abnormal findings in numerical data can be directly linked and be evaluated in the waveform data. For example, one can find numeric parameter variations caused by the influence of imposed high-frequency noise.

Numeric and Waveform Synchronized Data

Custom Triggers and Computations

Define and use event triggers and custom computations as per application needs. The event trigger function allows users to set limits to capture readings that fall within or outside a specific range of power, current or other parameters. Users can also define and use up to 20 different expressions for custom calculations. Data that meets the trigger conditions can be stored, printed, or saved to a USB memory device.

Custom Triggers and Computations

Follows frequency fluctuations in input signals by auto update mode

This feature can follow fluctuating input frequencies without gaps by changing the data update rate automatically when measuring devices like motors whose input signal frequency fluctuates with changes in rotation speed. It can cover from frequencies as low as 0.1Hz. In addition to constant-interval update mode of 10ms-20s, “Auto update mode”, which updates data in sync with the cycle of input signal, is now available. This new feature is useful for continuous measurement, such as automated testing.

Follows frequency fluctuations in input signals by auto update mode

Easy setup menu

Current range, various filters, data update rate, and measurement period can be automatically switched according to the measurement scene.
The measurement scene can be selected from among "50/60Hz," "DC," "PWM," "High Frequency," and "General.
After the automatic setting, the switched items can be checked at a glance and the settings can be easily adjusted.

Easy setup menu

Wiring with delta conversion useful for motor parameter measurement

When three-phase delta wiring is used, the results of converting to phase voltage using delta-star conversion can be used to measure harmonics, display waveforms on screen, and output data. (When using star connections, it is possible to measure harmonics using the result converted to line voltage using star-delta conversion.)
It can calculate the fundamental wave components of phase voltages required for measuring motor parameters (Ld, Lq), and can be used to evaluate synchronous motors.

Wiring with delta conversion useful for motor parameter measurement

Electric Vehicle Development

Electric Vehicle Development

Overview

Between 16 to 18% of the total charge of an electric car is consumed by electric drive system losses. Electric and hybrid car manufacturers therefore need to accurately evaluate motor and inverter control in order to achieve higher precision and greater efficiency. Additionally, the accurate analysis of inverter waveforms without interference from switching noise is a key part of evaluating the motor drive circuit.

Key requirements:

  • Multi-phase measurements from battery, inverter and motor
  • Evaluation of motor characteristics such as torque, rotation speed and direction, slip and electrical angle
  • Battery charging/discharging characteristics
  • Harmonic analysis of inverter signals at various rotation speeds

Key requirements

The WT5000 Advantage

With high accuracy, multi-channel power measurements, evaluation of up to 4 motors and harmonic comparison capabilities, the WT5000 helps automotive engineers improve conversion efficiency, shorten charging times and improve driving range. 

Guaranteed accuracy in multichannel measurements 
It enables simultaneous measurements of voltage, current, power, torque, rotation speed, electrical angle and mechanical power.

Motor evaluation and mechatronic efficiency 
Measure rotation speed, torque, and output (mechanical power) of motors from analog/pulse inputs of rotation or torque sensors. A single WT5000 can be configured for synchronized measurements from up to 4 motors simultaneously.

Battery charging & discharging characteristics
Integration of Instantaneous positive and negative values of energy allows the evaluation of battery charging and discharging characteristics.

Harmonics Analysis & comparisons 
With the ability to measure harmonics up to the 500th order even at low rotation speeds, the WT5000 supports harmonic analysis without the need for an external sampling clock. 

Renewable Energy Development

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 is key to improve the efficiency of the overall energy system.

Key requirements:

  • Multi-phase measurements from boost converter, inverter and storage battery
  • Evaluation of maximum power and instantaneous peak values
  • Energy bought and sold in grid
  • Battery charging/discharging characteristics
  • Harmonic analysis of inverter signals at various generator speeds

Key requirements

The WT5000 Advantage

WT5000 helps engineers working in the development of renewable energy solutions, to improve conversion efficiency by offering precision insights in charging, discharging, storage and overall efficiency. 

Multi-channel Power measurements 
Evaluate Power conditioner efficiency with simultaneous measurements from the inputs and outputs of boost converter, inverter, and storage battery. With measurement capabilities from up to 7 input elements the WT5000 is ideal for voltage, current, power, and frequency (for AC) before and after each converter, as well as converter efficiency and charging efficiency. 

Instantaneous peak power 
In photovoltaic power generation, an Maximum Power Point Traker (MPPT) controller varies the voltage to maximize energy harvested from the solar panel. The WT5000 is capable of measuring not only the voltage, current, and power but also the voltage, current, and power peak values plus (+) and minus (−) sides, respectively 

Energy Bought/Sold and Charged/Discharged 
The WT5000E provides a current integration (q), apparent power integration (WS), reactive power integration (WQ), as well as effective power integration capable of integration in the power sold/bought and charge/discharge modes. 

Harmonics Analysis & comparisons 
Voltage fluctuations and harmonics flow into the power systems due to reverse power flow. The harmonic measurement function enables measurement of harmonic components to compute and display total harmonic distortion (THD) and harmonic distortion factor.

Inverter/Motor Drives

Overview

Motor drive technology has become more complex in recent years, pure sine-wave PWM is less common, and cases where the mean voltage differs greatly from the fundamental voltage waveform, are more frequent.

Key requirements:

  • Multi-phase measurements from battery, inverter and motor
  • Evaluation of motor characteristics such as torque, rotation speed and direction, slip and electrical angle
  • Harmonic analysis of inverter signals at various rotational speeds

The WT5000 Advantage

With high accuracy, multi-channel power measurements, motor evaluation and harmonic comparison capabilities, the WT5000 helps engineers in motor and drive development to improve power consumption and conversion efficiency in inverter/motor drive systems. 

Guaranteed accuracy across a wide range 
 The WT5000 guarantees a basic power accuracy of ±0.03%, between 1% to 130% of the selected voltage and current measurement ranges, at 50/60 Hz. 

Simultaneous measurements from the inputs and outputs of boost converter, inverter, and storage battery 

Inverter and motor efficiency 
In addition to computing power conversion efficiency of inverter and motor (up to 7 power inputs), the WT5000, also allows the measurement of rotational speed, torque, and output (mechanical power) from the analog/pulse inputs of rotation or torque sensor. 

Harmonics Analysis & comparisons 
With the ability to measure harmonics up to the 500th order even at low rotation speeds the WT5000 supports harmonic analysis without the need of an external sampling clock. 

Magnetic Characteristics Testing

Overview

In transformer or reactor development, the WT5000 can be used to evaluate magnetic material characteristics using Epstein frame system.

Key requirements:

  • High precision measurements of primary coil current and secondary coil voltage is needed.
  • High accuracy in low power factor is needed.
  • The magnetic flux density B and AC magnetic field H are key parameters to calculate iron loss.

The WT5000 Advantage

 Highest voltage and current accuracy
WT5000 provides highest power accuracy:
0.01% of reading + 0.02% of range (50/60 Hz)

High accuracy at low power factor
Effect of Power Factor of WT5000:
0.02% of S (0.5 A or more)
0.07% of S (200 mA or less)

Power Calibration 

Overview

For customers who use a large number of power meters, WT5000 can be used as a reference standard for periodic in-house calibration of power measurement instruments, such as the WT300E series and WT500. 

Key requirements:

  • Sufficient power accuracy is needed for power measurement instruments.
  • Power factor is adjustable, and the accuracy in low power factor is guaranteed.

The WT5000 Advantage

Highest power accuracy 
WT5000 provides highest power accuracy: 
0.01% of reading + 0.02% of range (50/60 Hz) 

High accuracy at low power factor 
Effect of Power Factor of WT5000: 
0.02% of S (0.5 A or more) 
0.07% of S (200 mA or less) 

 

  • Only use the WT5000 precision power analyzer to measure parameters like current, voltage, and power.
  • Check that the instrument and its protection functions are in proper working condition before use.
  • Use a power supply with the correct voltage for the high accuracy power meter's rating, and don't use a power supply that exceeds its maximum voltage.
  • Always use the right power cord and plug.
  • Ensure protective grounding.
  • Don't use the WT5000 power analyzer around flammable gases or vapors.
  • Consult the instruction manual for full guidance on the front, rear, top, and touch panels, panel keys, system configurations, handling, installation, setup, wirings, inputs and outputs, troubleshooting, and more.

760901 30A High Accuracy Element

760901 30A High Accuracy Element. Includes external sensor input.

760902 5A High Accuracy Element

760902 5A High Accuracy Element. Includes external sensor input.

760903 Current Sensor Element

Current Sensor Element
Firmware version 3.01 or later of WT5000 main frame is required.

366924 BNC to BNC 1m Cable

  • 366924 BNC to BNC cable for oscilloscope 
  • 1m BNC wire
  • Simultaneous measurement with 2 units
  • Input external trigger signal

701902/701903 Safety BNC to BNC Cable 1m/2m

  • 701902/701903 Safety BNC to BNC Cable for oscilloscope
  • Safe, high-voltage measurements with DL350, DL950, and SL1000 isolated input modules 
  • 701902: 1000 Vtms-CAT II (BNC-BNC), 1 m
  • 701903: 1000 Vrms-CAT II (BNC-BNC), 2 m

758917 DMM Measurement Lead Set

  • Set of 0.8m long red and black multimeter test leads
  • Used in combination with a pair of optional 758922 or 758929 alligator-clip adapters
  • 1000 Vrms, 32 Arms CAT II

B9284LK External Sensor Cable

For connection the external input of the WT3000 to the current sensor.
Length: 50cm

758922 Small Alligator-Clip Adapter 300V

Rated at 300 V. Attaches to the 758917 test leads. Sold in pairs.

366925 BNC to BNC 2m Cable

BNC-BNC 2m. For connection to simultaneously measurement with 2 units, or for input external trigger signal.

758923 Spring Hold Safety Terminal Adapter Set

Two adapters in a set (spring-hold type).

758929 Large Alligator Clip Adapter 1000V

  • Yokogawa 758929 Alligator Clip Adapter 
  • Rated at 1000V
  • Attaches to 758917 test leads
  • Sold in pairs black/red

CT60/ CT200/ CT1000/ CT1000A/ CT2000A AC/DC Current Sensor

AC/DC current sensors capable of highly accurate measurement starting in DC range.

AC/DC Split Core Current Sensor CT1000S

Measure high currents without disassembling existing cabling. Compatible with power analyzers and waveform measurement instruments.

758931 Screw-Fastened Safety Voltage Terminal Adapter Set

Screw-fastened adapters. Two adapters in a set. 1.5 mm Allen Wrench.

761951 Safety Terminal Adapter Set

Screw-fastened type adapters for 30 A element. Black/Red two adapters in a set.

761952 Safety Terminal Conversion Adapter Set

Female-female type adapters for 5 A element. Black/Red two adapters in a set.

761953 Safety Terminal Adapter Set

Two adapters to a set for 5 A current
(screw-fastened type using B9317WD)

Overview:

Maximum torque per ampere (MTPA) is an optimization strategy for the control of electric motors and drives that employ field-oriented control (FOC), particularly with electric vehicles (EVs) and industrial automation applications. The goal of MTPA is to achieve the maximum possible torque output from a motor for a given current input.

Overview:

Maximum power point tracking (MPPT) charge controllers play a crucial role in the optimization of renewable energy system efficiency and performance. Through dynamic tracking of a renewable energy source’s maximum power point, an MPPT controller enables more efficient energy harvesting, faster charging, and adaptability to changing environmental conditions.

Overview:

Measurement guidance related to field-oriented control (FOC) of electric motors with example use cases that illustrates how this is accomplished using a power analyzer and/or a ScopeCorder. Specifically addressed are direct and quadrature currents of a surface-mounted permanent magnet motor (SMPM) with field weakening applied. The techniques illustrated can also be applied to other FOC variables, algorithms, and motor technologies.

Overview:

Energy consumption in low-power and standby modes is an important issue due to increased awareness that energy resources are becoming limited and demand for energy-saving household electrical appliances continues to grow. IEC62301 Ed2.0 (2011) and EN 50564:2011 define standby mode as the lowest energy consumption of an appliance not performing its main function, when connected to the mains. IEC62301 Ed2.0 (2011) defines test methods and requirements for both the mains supply and the test equipment. It is crucial that design and test engineers choose highly accurate power measurement tools to confirm that their devices meet these requirements.

Overview:

【search key】 WT5, WT50, WT500, WT

Overview:

With increased focus on reducing energy consumption and compliance with efficiency standards, this app note provides an overview on the types of measurements needed for efficiency and power quality, and the instruments that take them.

Overview:

Designing an instrumentation system for high current measurement requires careful consideration of the trade-offs associated with each type of sensing device. The purpose of this application note is to help engineers understand the sensing choices available and the corresponding trade-offs with each technology.

Overview:

【search key】 WT1, WT18, WT180, WT3, WT30, WT5, WT50, WT500, WT

Industries:
Overview:

Detailed measurement methods, supply voltage settings, and others are specified for the harmonic/flicker standard test.

Overview:
  • IS8000 Integrated Software Platform
  • Measure current waveform using oscilloscope
Overview:

Government agencies that define the standardization of energy efficiency metrics continue to be a driving force behind the development of the next generation electric vehicle powertrains. These metrics require manufacturers to have high confidence in their measurements and motivate the optimization of efficiency.

Industries:
Overview:

The objective of this paper is to show the close relationship between efficiency and power quality, and provide education on the causes of power quality, types of power quality issues, and provide guidance on measurement considerations.

Overview:
  • Power Analyzer Accuracy and Basic Uncertainty Calculator from Yokogawa Test&Measurement 
  • Determine uncertainty in voltage, current, and active power (watts) measurement values
  • Various frequency ranges and wiring systems
Overview:

This training module covers the following topics:

  • Introduction & Installation
  • Connecting to Instrument
  • Setup, Measure, and Analyze
  • File Operations: Saving and Loading Data
  • Video Demonstrations
Brochures
Instruction Manuals
Software
Firmware
Drawings

Product Overviews

    Overview:

    Test and measurement engineering work groups can have differing priorities and requirements, which often results in multiple instrumentation systems and data file formats, as well as incompatible reporting. This lack of effective communication between groups and instruments causes decreased efficiency and quality and increased spending and time to market. Unify test and measurement instrumentation, software, and data across engineering teams with a suite of solutions that caters to the different needs of engineering work groups, including accurate power data, fast sampling rates, long recordings of multiple different input types, and insights into waveform data.

    Overview:

    The current sensor element for the Yokogawa Test&Measurement WT5000 Precision Power Analyzer is ideal for applications requiring a current transformer for high-current measurements. The internal DC power supply simplifies preparations before measurement, requiring only a connecting cable and eliminating the external power supply.

    The WT5000, an industry-leading power analyzer, features seven field-removeable elements, 10 MS/s, 1 MHz power bandwidth, 18-bit resolution, and 0.03% basic power accuracy. Yokogawa Test&Measurement continues to innovate on the platform, enabling /D7 data streaming, /G7 harmonics, and flicker analysis.

    The new current sensor element replaces the traditional current inputs and includes a sensor input terminal with integrated ±15V power supply, eliminating the need for an external power supply. The isolated voltage terminals remain the same as the 5A and 30A elements.

How-tos

Webinars

    Overview:

    While DC power measurements are relatively straight forward, AC power measurements that include distorted waveforms, varying power factors, and multiple phases can add complexity to an otherwise simple measurement. During this webinar, we cover multiple fundamentals of power measurement.

    Key topics include:

    • Multi-phase measurements
    • Measurement techniques
    • Measurement applications
    • Real-world examples and more
    Overview:

    You know the basics of electrical power measurements, have set up your dyno, and made key measurements – which is great. But as your motor and drive projects progress, the complexities of system drive requirements can change frequently. Control algorithms, networked communications, and mechanical systems form a complex web of interactions that need sorting. This 60-minute webinar explains how to get past ground-level measurements and delve into comprehensive solutions that leverage test and measurement instruments including power analyzers, high-speed data acquisition, and real-time software.

    Topics include:

    • How to avoid the “gotcha's” of inverter-based measurements
    • Computations for field-oriented control
    • The integration of CAN bus communications
    • Correlations in the frequency domain
    • Other advanced motor and drive topics

    The technical presentation includes an audience Q&A.

    Overview:

    With ongoing innovations in motor and inverter technologies seeking to advance global decarbonization objectives in the automotive industry, it’s crucial that engineers have a thorough understanding of how to properly analyze these systems.

    This complimentary webinar provides engineering professionals involved in motor and control system development with insights that enable data benchmarking and troubleshooting issues related to energy efficiency in electric vehicle (EV) powertrains.

    Key webinar topics include:

    • Establishing baselines for system efficiency
    • Conducting inverter control signal analysis at the systems level
    • Identifying critical measurements for benchmarking inverter input, inverter output, and motor output
    • Analyzing motor control signals, including torque control variables, positional sensors, and pulse-width modulation (PWM), as well as torque measurements
    Overview:

    Why should you be concerned with your product’s power system voltage and current harmonics? From an engineering perspective, harmonics produce excessive heat in equipment that causes significant damage and results in inefficient operation. From a business perspective, compliance is an absolute requirement for entry into global markets. To minimize or eliminate these issues and establish acceptable levels of harmonics, numerous power quality standards with specifications and limits for harmonic distortion, such as IEEE 519-2014 and IEC61000-3-2, have been introduced. During this webinar, attendees will gain knowledge on the inner workings of harmonics, learn best practices for accurately measuring harmonics, learn to recognize and distinguish the critical difference between DFT and FFT, and discover important measurement tradeoffs across various test equipment.

    Overview:

    Although DC power measurements can be fairly straightforward, complexities with AC power measurements arise when dealing with distorted waveforms, fluctuating power factors, and multiple phases, which introduce intricacies that complicate an otherwise simple measurement process.

    This on-demand webinar provides an informative dive into the various fundamental aspects of power measurement and includes:

    • A look at multi-phase measurements and measurement techniques
    • A review of practical applications
    • Real-world examples

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