Atec WT3000 User Manual

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Precision Power Analyzer WT3000

WT3000

Precision Power Analyzer

High-end Power Meter with top precision* Basic Power Accuracy: 0.02% of reading



Basic Accuracy



Basic Power Accuracy



Good Readability



Simultaneous Measurement with 2 Units (8 Power Input Elements)



Store Function



Interface



Advanced Computation Function



IEC61000-3-2



IEC61000-3-3

* As of July, 2013, for power meter accuracy in three-phase power meter (as investigated by Yokogawa).

0.01% of reading

0.02% of reading

The Large, 8.4-inch LCD and the Range Indicator LEDs

50 ms Data Storing Interval

GP-IB, Ethernet, RS-232 and USB

Waveform Computation, FFT Analysis, Waveform sampling Data Saving

Harmonic Measurement

Voltage Fluctuation/ Flicker Measurement

www.yokogawa.com/tm/

(WT3000)

Bulletin 7603-00E

Visit our website to sign up for email updates.

Precision Power Analyzer WT3000

Yokogawa’ s po wer measurement technology provides best-in-class

precision and stability

APEX

Basic

Power

Accuracy:

±0.02%

With basic power accuracy of ± 0.02% of reading, DC and 0.1 Hz–1 MHz measurement bandwidths, and up to four input elements, the WT3000 provides higher-accuracy measurement for inverter I/O efficiency.

More Precise. More Bandwidth. More Features.

• The WT3000 is a truly innovative measurement solution, combining top-level measurement accuracy

with special functions.

• The large, 8.4-inch liquid crystal display and the range indicator LEDs ensure good readability and

make the system easy to use.

The WT3000 is the answer to your measurement prob lems.

Have you had problems or questions such as these?

• When working with efficiency-improvement evaluation data for a high-efficiency motor, improvements cannot be seen unless measurements are taken with very high precision.

• Measurement efficiency is poor during power measurements and power supply quality measurements.

For answers to these questions, see page 6.

Features

Standard feature

Option

Software (sold separately)

Voltage

range

Normal

harmonics

DAoutput

Current

range

Wideband harmonics

VGA

External

harmonics

sensor

range

IEC

Comm

Frequency

power range

FET

computation

Comm

Inputs

4 input

elements

Waveform

computation

Comm

Basic Power

Accuracy

Sampling

data saving

Comm

USB

Crest factor

Cycle Fricker

Software

Display

Software Software

Data

updating

interval

As fast as

50 ms

PCcard

slot

Delta

calculation

Internal Memory

Frequency

measurement

USB

memory

Motor

evaluation

Printer

Better Efficiency in Power Measurements

In developing the WT3000, Yokogawa focused on improving efficiency in two basic areas. One goal was to obtain highly precise and simultaneous measurements of the power conversion efficiency of a piece of equipment. The other objective was to improve equipment evaluation efficiency by making simultaneous power evaluations and tests easier and faster.

New Innovations to Enhance the Reliable Measurement Tec hnology

With the WT3000, we made further improvements to the basic performance specifications for even better functionality and reliability. We are confident users will appreciate these improvements to power and efficiency measurements thanks to the new power control technologies we have introduced.

A Variety of External Interface Choices

The WT3000 equips with a PC card slot (ATA flash card slot). The WT3000 is also standard-equipped with a GP-IB port. In addition, a serial (RS-232) port, Ethernet port, USB port for peripheral, and USB port for connection to PC are available as options. The variety of interface choices allows customers to use the best interfaces for a wide variety of equipment, media, and network environments.

Select the model most suited to your measurement needs.

Standard Version

夹High Accuracy and Wide Frequency Range

Basic Power Accuracy

±(0.02% of reading + 0.04% of range)

Frequency Range

DC, 0.1 Hz to 1 MHz

夹Low Power Factor Error

Power factor influence when cosø=0

0.03% of S

S is reading value of apparent power ø is phase angle between voltage and current

夹Current Range

Direct Input

0.5/1/2/5/10/20/30 [A] * 5m/10m/20m/50m/100m/200m/500m/1/2 [A] *

External Input

50m/100m/200m/500m/1/2/5/10 [V] *

夹Voltage Range

15/30/60/100/150/300/600/1000 [V] *

*Voltage range and current range are for crest factor 3

夹Continuous Maximum Common Mode

Voltage (50/60 Hz)

1000 [Vrms]

夹Data Update rate: 50 ms to 20 sec 夹Effective input range: 1% to 130% 夹Simultaneous measurement with 2 Units 夹Standard PC Card Slot 夹Storage Function (Approximately 30MB

internal memory)

Yokogawa’s highest-precision power meter

The WT3000 has the highest precision of the Yokogawa power meters in the WT Series. The models in the WT Series are designed to meet a wide variety of user needs. The WT300 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.

WT3000

±0.02%

WT1800

±0.10%

WT300

±0.10%

*reading error

Motor Version

In addition to the functions of the standard version, the models offer powerful motor/inverter evaluation functions.

夹Motor Efficiency and Total Efficiency

Measurement

Analog or pulse signal from rotating sensor and torque meter can be input, and allows calculation of torque, revolution speed, mechanical power, synchronous speed, slip, motor efficiency, and total efficiency in a single unit.

*1 As of July, 2013, for power accuracy in a three-phase power meter

(as investigated by Yokogawa)

*2 As compared to Yokogawa’s products

Precision Power Analyzer WT3000

FUNCTIONS

䉴 WT3000 Controls:

Simple to Use, Easy to View

The WT3000 was designed with user-friendly functions and controls in response to user requests for a simpler range setting operation and more user-friendly parameter setting display process.

Simpler range settings

Range settings using direct key input

The range indicator on the WT3000 is a seven-segment green LED, so the set range can be monitored at all times. The range can easily be switched using the up and down arrows.

Item pages make it easy to set the data you want to view for each experiment

Using item pages to set display preferences

The WT3000 has nine numeric item pages for displaying measurement values. Once you set the measurement parameters you want displayed on a particular item page, you can easily switch between entire groups of displayed parameters.

䉴 A wide range of standard functions

Formats for viewing waveforms as well as numerical values

A Variety of display formats

The WT3000 lets you display input signal waveforms in addition to numerical value data. This means you don’t need to connect a special waveform analyzer just to check signal waveforms. In addition, the optional advanced computation function lets you display vectors and bar graphs for enhanced visual presentation.

*1 Waveforms up to

approximately 10 kHz can be displayed accurately.

*2 Excludes single phase model.

High-speed measurement to capture rapid data fluctuations

Trend display

Vector display

50ms data updating intervals

Fast updating allows you to precisely capture rapidly changing transient states in the measurement subject. * The WT3000 switches between two different calculation systems depending on

the data updating interval. See page 19 for details.

Compensates for the loss

Compensation functions

This function compensates for the loss caused by the wiring of each element. The WT3000 has the following three types of correction functions to measure the power and efficiency.

• Wiring Compensation

This function compensates for the loss caused by the wiring of each element.

• Efficiency Compensation

The power measurement on the secondary side of a power transformer such as an inverter includes loss caused by the measurement instrument. This loss appears as error in the efficiency computation. This function compensates for this loss.

• Compensation for the Two-Wattmeter Method*

In the two-power wattmeter method, an error results when current flows through the neutral line. This function computes the currents that flows through the neutral line for measurements using the two-wattmeter method with a threephase, three wire (3V3A) system and adds the compensation value to the measured power. *Requires the delta computation option (/DT).

Storing measurement data*

Store Function

Voltage, current, power, and other measured data can be stored to the unit’s approximately thirty megabytes of internal memory. These data can be saved in binary or ASCII format on a PC card or USB memory *. *requires the /C5 option

A way to add user-defined measurement parameters

User-defined function

As many as twenty user-defined formulas can be set in the WT3000. These equations can be used to calculate various parameters, such as mean active power (see “A variety of integration functions” below).

An easier way to input efficiency calculation formulas

Efficiency calculation function

This function can be used to set up to four efficiency calculation formulas.

Apparent power integration and reactive power integration

A Variety of integration functions

• Active power, current, apparent power, reactive power In addition to the active power integration function (WP) and current integration function (q) included in earlier models, the WT3000 also has a new apparent power integration function (WS) and reactive power integration function (WQ).

•A wide effective input range for high-precision integration The WT3000 has a wide effective input range, from 1% to 130% of the measurement range.

•Average active power (using user-defined settings) Average active power can be calculated over an integration interval. This feature is useful for evaluating the power consumed by intermittent-control instruments in which the power value fluctuates.

Average active power =

Power value

Easily switch between multiple item pages

Integrated power (WP)

Integrated elapsed time (H)

Instantaneous power value

Time

Average active power value

OPTIONS

䉴 A wide variety of optional functions make it easy to perform

sophisticated power evaluations.

When you purchase a WT3000 from Yokogawa, you get to select just the options you need. This approach lets you maximize performance at a lower cost.

Checking harmonic components and total harmonic distortion (THD)

Advanced Computation (/G6)

The advanced calculation function (/G6 option) meets these measuring needs with advanced, powerful features for making power analysis measurements more efficient.

• Harmonic Measurement in Normal Measurement Mode

You can measure harmonic data while in normal measurement mode. This is effective for observing values from normal measurements and harmonic data at the same time.

• Wide Bandwidth Harmonic Measurement

This dedicated harmonic measurement function is distinct from the harmonic measurements that can be taken in normal measurement mode. The function is useful for ascertaining the distortion factor and harmonic components in strain measurements of fundamental frequencies from 0.1 Hz to 2.6 kHz. It allows wide bandwidth measurements of signals that include high frequency waves, such as from power supplies and acceleration of motor revolution.

• Waveform Computation

You can perform computations on measured waveforms, and display power (instantaneous voltage × instantaneous current) and other waveforms on screen.

• FFT

You can analyze and display a waveform’s individual frequency components. You can also check signal components other than the integer multiples of the fundamental wave.

• Waveform Sampling Data Saving

You can save sampling data of input waveforms, waveform computations, and FFT computations. The data is available for any kind of computation by PC software.

Output graphics at the touch of a button

Built-in printer (/B5)

The optional built-in printer is installed on the front side of the WT3000, so it is easy to use even if the WT3000 is mounted on a rack. The printer can be used to print data and waveform memos.

Capturing cycle-by-cycle fluctuations

Cycle by Cycle Measurement (/CC)

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. Input frequencies from

0.1 Hz to 1000 Hz can be measured. Up to 3000 data can be saved in CSV format. Also, with the WTViewer software (model 760122, sold separately), data can be displayed in graphs by cycle.

Measurement data display

Checking the frequencies of all inputs

Added Frequency Measurement (/FQ)

In addition to the standard two channels of frequency measurement, a six-channel frequency measurement option is also available. This option provides frequency measurement of voltage and current on all eight channels (with input elements 1

Input signal and FFT data Input signal and power waveform

Performing IEC harmonic standards tests

IEC harmonic measurement mode (/G6)

Harmonic measurement software* can be used in this dedicated mode for harmonic measurement that supports international standards. This allows confirmation of whether or not home electronics, office automation equipment, or other devices conform with harmonic standards.

* IEC standard compliant harmonic measurement requires the model 761922 harmonic

measurement software.

Voltage Fluctuation and Flicker Measurement (/FL)

Enables voltage fluctuation/flicker measurement conforming to IEC61000-3-3. The following values related to voltage fluctuation that are stipulated by the IEC610003-3 standard can be calculated from the measured data: dc (relative steady-state voltage change), dmax (maximum relative voltage change), dt (relative voltage change time), short-term flicker value Pst, long-term flicker value Plt, instantaneous flicker sensation, and others. In this mode, you can judge whether voltage fluctuations in the item under test relative to a specified minimum value are within the standard.

* The flicker test can also be performed with the WT3000 alone. Using the model 761922

harmonic/flicker measurement software (sold separately), you can display trend graphs, CPF graphs, or reports of the dc, dmax, and IFS (instantaneous flicker sensation) values in addition to the WT3000 judgment results.

Checking phase voltage when you measure line voltage

Delta Calculation (/DT)

This function allows you to calculate individual phase voltages from the line voltage measured in a three-phase, 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.

Note: This function cannot be used for products with only one

element.

Note: When taking measurements that incorporate measuring instrument options, certain functions, displays, and measuring functions may be limited depending on the measurement mode. For example, waveform and FFT computations may not be used simultaneously.

T phase

R phase

S phase

through 4 installed). This is necessary when you want to measure voltage and current frequency from the instrument’s I/O as well as voltage and current frequencies of multiple items under test at the same time.

Outputting measurement values as analog signals

D/A Output (/DA)

• 20 Channels

Measured values and calculated value by user-defined function can be output as ± 5V FS DC voltages from the D/A output connector on the rear panel.

• D/A zoom

This function allows the any input signal range to be scaled to between -5V and 5V* in the D/A output as Upper and Lower ranges. This makes it possible to enlarge input signal fluctuations for observation using a recorder or logger.

* The range is 0V to 5V for some functions, such as frequency measurement.

Video output for viewing on a larger screen

VGA output (/V1)

The VGA port can be used to connect an external monitor in order to view numerical value data and waveforms on a larger screen. This capability is useful if you want to simultaneously check large amounts of data on a separate screen, or view data in a separate location.

USB Port (Peripheral) Option (/C5)

You can save voltage, current, power, and other kinds of data that are stored in the WT3000 to a USB Memory. The data can be saved in binary or ASCII format. You can also connect a keyboard for easy input of user-defined math expressions.

Precision Power Analyzer WT3000

Variety of Communication Functions (GP-IB Comes Standard)

USB Port (PC) Option (/C12)

The USB port (type B connector) on the rear panel of the WT3000 allows data communications with a PC

1. USB driver required for USB communications. A USB driver is available from our Web site.

Serial (RS-232) (/C2)

* Select USBport (PC) or RS-232

Ethernet port (/C7)

The optional Ethernet port (100BASE-TX/10BASE-T) allows you to connect the WT3000 to a LAN. Once connected, images and numerical value data saved on the WT3000 can be transferred to a PC using FTP server software or other utilities.

APPLICATIONS

Measurement Applications to Utilize WT3000’s Capabilities

Measurement of Inverter Efficiency

• Measuring Efficiency with High Precision: Simultaneous Measurement of Input and Output

The WT3000 offers up to four input elements capable of simultaneous measurement of single-phase input/three-phase output, or three-phase input/three-phase output.

• Accurate Measurement of Fundamental PWM Voltage

Motor drive technology has become more complex in recent years; pure sinewavemodulated PWM is less common, and cases in which the voltage mean differs greatly from the fundamental voltage waveform arise frequently. With the optional harmonic measurement function of the WT3000, accurate measurements of commonly measured values such as active power and the fundamental or harmonic components can be taken simultaneously without changing measuring modes.

• Phase Voltage Measurement without a Neutral Line (/DT option)

With the delta computation function, an object under test without a neutral line can be measured in a three-phase three-wire (3V3A) configuration, allowing calculation of each phase voltage.

•High Frequency and Harmonic Measurements (Requires the /G6 Option)

The fundamental frequencies of motors have become faster and faster. The WT3000 allows harmonic measurements of signals with fundamental frequencies as high as

2.6 kHz.

• Evaluation of Torque Speed Characteristics (Requires motor version, the /CC Option)

Torque speed can be evaluated based on the torque and revolution speed data measured with the motor version. Also, you can confirm the cycle-by-cycle voltage, current, and power fluctuations that occur such as when starting the motor.

inverter motor load

input signal

output signal

You can take measurements in excess of 30 A by using a 2 A input element together with the model 751574* current transducer. *See page 10 of the specifications.

When measuring three-phase input/three-phase output with a three-phase four-wire system, you can measure input and output simultaneously by synchronizing between two units.

torque

and

speed meter

trend display of torque and rpms

(requires motor version)

• Related applications

Power conversion technologies such as those used in EVs and power conditioners

High-precision, simultaneous measurements are required in measuring conversion efficiency in the conversion of a converter's three-phase input to a DC bus, and the conversion from an inverter's DC bus to three-phase output.

Evaluation of Lighting Devices

•Simultaneous Measurement of Voltage, Current, and THD (Total Harmonic distortion)

Testing of lighting devices often involves measurement of voltage, current, and THD, a parameter that indicates the quality of power. This is because distortion in voltage and current waveforms is becoming more prevalent due to the increasing complexity of control systems.

The WT3000 can simultaneously measure voltage and current with THD, eliminating these inconveniences and allowing for more accurate and rapid measurements of an instrument’s characteristics and fluctuations.

Ballast

lamp

Flourescent

High Accuracy Measurements of Transformers

•High Accuracy Even at Low Power Factors

The WT3000 represents great improvement over previous models in terms of power factor error (it is approximately three times more accurate). With improved measurement accuracy in the lower power factors—such as with transformers, active power values can be measured with higher precision.

•Simultaneous Measurement of RMS and MEAN of Voltage

Voltage RMS (the true RMS value) and voltage MEAN (rectified mean value calibrated to the rms value) can be measured at the same time, allowing for measurement of corrected power (Pc).

• Phase Voltage Confirmation

The delta computation function (/DT option) allows both star-delta and delta-star conversion.

Measuring Conversion Efficiency of Power Conditioner

• Conversion Efficiency Measurement

Renewable energy source of photovoltaic power generation and wind power is converted dc to ac using power conditioner. The WT3000 Precision Power Analyzer provides measurement with world-class DC and AC signal accuracies.

Secondary current Cathode current

* THD stands for total harmonic distortion. In other words, the distortion factor. *Please be aware that during lighting testing, the measured values and efficiencies may not be

stable since the power conversion efficiency fluctuates over time due to the emission of heat.

 Lamp Current Measurement

Since lamp current flows inside of fluorescent tubes, normally it cannot be measured directly. However, lamp current can be displayed by measuring secondary current and cathode current and finding the difference in their instantaneous values using the delta computation function (/DT option).

• Related applications

Evaluation of power quality in equipment designed to be connected in a system, such as UPSs and power conditioners

Solar cell module

Measurement of Power Consumption in Mobile Phones

You can measure power consumption in mobile phones, batteries, and other equipment powered by dry cells. You can perform a variety of operation tests for reducing power consumption by using the current or power integration function. This offers a powerful means of evaluating instruments, such as for checking control modes for lengthening battery life.

Major Features

• 5mA range for very low current measurements

• Checking power consumption integration of mobile phones when switching modes (using integration functions)

• Visually observing trends in power consumption using trend display functions that allow checking of temporal fluctuations

• Checking the waveform of the consumed current

• Null function can be used to subtract the DC offset

Use the 2A input element for small current consumption.

booster

converter

Example of Overview of a Photovoltaic Power Conditioner

Measure the DC voltage, DC current, and power conversion efficiency

DC/AC

converter

Since images can be saved, they can be pasted as-is into reports as evaluation and test data.

Reference equipment for power calibration

• Basic power accuracy of ±0.02% of reading

The WT3000 can be used as a reference instrument for periodic in-house calibration of general-purpose power measurement instruments, such as the WT300 series.

Temperature- and humidity-controlled calibration room

Load

Power Link

Example of integration graph display Current consumption in mobile phones

Precision Power Analyzer WT3000

SOFTWARE

Utility Software

WTViewer 760122 WTFileReader (Combined into the WTViewer)

WTViewer is an application software tool that reads numeric, waveform, and harmonic data measured with the WT3000 Precision Power Analyzer. Communications:GP-IB, Serial (RS-232, /C2), USB(/C12), or Ethernet (/C7)

• Numeric Data

WTViewer can simultaneously display voltage, current, power and various other measured parameters for one to four elements individually, and for ∑A and ∑B calculations.

•Measuring Harmonics*

WTViewer can numerically or graphically display the results of measured harmonics up to the 100th order for such parameters as voltage, current, power and phase angle.

* requires / G6 option

WT3000 File Reader (off-line)

WTFileReader software can load and display data measured by the WT3000 Precision Power Analyzer that has been saved to a memory medium. That data can also be saved in CSV format.

•Waveform

Voltage and current waveforms can be monitored on the PC screen. You can confirm the voltage-current phase difference, waveform distortion, and other phenomena.

• Viewing Trends

You can capture and view various data, measured with the WT3000 on your PC in a graphical trend format. This feature lets you monitor power supply voltage fluctuations, changes in current consumption and other time-based variations.

LabVIEW driver (Free)

You can download this software program from our web site

* LabVIEW is a registered trademark of National Instruments Corporation.

Harmonic Measurement / Voltage Fluctuation and Flicker Measurement Software (761922)

•

Harmonic Measurement (/G6 option)

The Harmonic Analysis Software (Model 761922) loads data measured by the WT3000 and performs harmonic analysis that complies with IEC61000-3-2 A2 of the edition 3.0. You can use the model 761922 harmonic measurement software to perform harmonic measurement tests conforming to IEC 61000-4-7 edition 2 (window width is 10 cycles of 50 Hz and 12 cycles of 60 Hz) with WT3000. Communications: GP-IB, Ethernet (/C7)

Harmonic Current Measurement Value List and Bar Graph

Enables PASS/FAIL evaluations of harmonic measurement results in line with standard class divisions (A, B, C, D). Displays lists of measurement values, as well as bar graphs that let you compare the measured value and standard limit value for each harmonic component.

Low distortion power supply

Tested product

Measurement Mode

Three modes are available for harmonic measurement.

• Harmonic observation: Lets you view current, voltage, and phase angle for each order in a bar graph.

• Waveform observation: Lets you view measured signals to confirm the suitability of the range and other factors.

• Harmonic measurement (standards testing): For conducting standards tests and making the associated judgments. Efficiency is gained by performing tests after checking the waveform in Observation mode.

•

Flicker Measurement (/FL option)

This function enables voltage fluctuation and flicker measurements in compliance with IEC61600-3-3 Ed2.0 (2008).

* The flicker test can also be performed with the WT3000 alone. Using the model 761922 harmonic/flicker measurement software (sold separately), you can display trend graphs, CPF graphs, or reports of the dc, dmax, and IFS (instantaneous flicker sensation) values in addition to the WT3000 judgment results.

Harmonic bar graph display in harmonic observation mode

Note) This software cannot communicate with the WT using a serial (RS-232) interface (/C2)

or USB port (PC) (/C12).

The flicker measurement of three phase equipment, it requires adding frequency

measurement option (/FQ).

REAR PANEL

䉴 Rear Panel





















Standard features

 Voltage input terminals  Current external sensor input terminals  Current direct input terminals  GP-IB port  BNC connector for two-system

synchronized measurement

Optional features

 Serial (RS-232) port (option/C2)

or USB port (PC) (option/C12)

 Ethernet port(100BASE-TX/10BASE-T)

(option/C7)

 VGA port (option/V1)  D/A output (option/DA)  Torque and speed input terminals

(motor version)

CHARACTERISTICS

䉴 Example of basic characteristics showing the WT3000’s high

precision and excellent stability

Example of frequency versus power accuracy characteristic

0.0

–5

Error (% of reading)

–10

–15

–20

100 V/5A range

10 100 1,000 10,000 100,000 1,000,000

Frequency (Hz)

1.000%

0.100%

0.010%

Total Error (% of range)

0.001%

0.01

Total power error with rated range input

for an arbitrary power factor (50/60Hz, 30A input element)

WT2000WT2000

WT3000WT3000

0.01 0.1 1

Power factor

-5

Error (% of range)

-10

-15 10 100 1,000 10,000 100,000 1,000,000

Example of frequency characteristic

100 V/5A range

Frequency (Hz)

Error (% of range)

–2

Effect of common mode voltage on reading value

15 V range 500 mA range

1 10,000 100,000

Frequency (Hz)

Precision Power Analyzer WT3000

ACCESSORIES

䉴 Related products

Current Sensor Unit Current Transducer Clamp on Probe

758917

758921

751521,751523

Current Sensor Unit

Current

Output

DC to 100 kHz/600 Apk

•Wide dynamic range:

-600 A to 0 A to +600 A (DC)/600 A peak (AC)

•Wide measurement frequency range: DC to 100 kHz (-3 dB)

•High-precision fundamental accuracy: ±(0.05% of rdg + 40 µA)

• Superior noise withstanding ability and CMRR characteristic due to optimized casing design

*751521/751523 do not conform to CE Marking

For detailed information, see Power Meter Accessory Catalog Bulletin 7515-52E.

Adapters and Cables

758917

Measurement leads

Two leads in a set. Use 758917 in combination with 758922 or

758929. Total length: 75 cm Rating: 1000 V, 32 A

701959

Safety mini-clip set (hook Type)

2 pieces (red and black) in one set. Rating 1000V

758922

Small alligator adapters

For connection to measurement leads (758917). Two in a set. Rating: 300 V

758924

Conversion adapter

For conversion between male BNC and female banana plug

CT60/CT200/CT1000

Current Sensors

• DC~800 kHz/60 Apk, DC~500 kHz/200 Apk, DC~300 kHz/1000 Apk

•Wide dynamic range: ±0-1000 A(DC) /1000 A peak (AC)

•Wide measurement frequency range: DC and up to 800 kHz

•High-precision fundamental accuracy: ±(0.05% of reading + 30 µA)

• ±15 V DC power supply, connector, and load resistor required.

For detailed information, see Current Sensors & Accessories Catalog Bulletin CT1000-00E.

758929

Large alligator adapters

For connection to measurement leads (758917). Two in a set. Rating: 1000 V

366924/25

BNC cable

(BNC-BNC 1m/2m) For connection to simultaneously measurement with 2 units, or for input external trigger signal.

758923

Safety terminal adapter set

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

B9284LK

External Sensor Cable

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

Current

Output

751552

Current Clamp on Probe

Current

Output

AC 1000 Arms (1400 Apeak)

• Measurement frequency range: 30 Hz to 5 kHz

•Basic accuracy: ±0.3% of reading

• Maximum allowed input: AC 1000 Arms, max 1400 Apk (AC)

• Current output type: 1 mA/A

A separately sold fork terminal adapter set (758921), measurement leads (758917), etc. are required for connection to WT3000. For detailed information, see Power Meter Accessory Catalog Bulletin 7515-52E.

*751521/751523 and CT series do not conform to CE Marking.

758931

Safety terminal adapter set

Screw-fastened adapters. Two adapters in a set. 1.5 mm Allen wrench included for tightening.

Due to the nature of this product, it is possible to touch its metal parts. Therefore, there is a risk of electric shock, so the product must be used with caution.

*1 Maximum diameters of cables that can be connected to

the adapters 758923 core diameter: 2.5 mm or less; sheath diameter: 4.8 mm or less 758931 core diameter: 1.8 mm or less;

sheath diameter: 3.9 mm or less *2 Use with a low-voltage circuit (42V or less) *3 The coax cable is simply cut on the current sensor side.

Preparation by the user is required.

758921

Fork terminal adapter

Two adapters (red and black) to a set. Used when attaching banana plug to binding post.

Typical Voltage/Current Connections

Measurement using current sensor

Connection example

Unit whose current is to be measured

CT1000

* A burden resistor is required for the CT1000, CT200, CT60, and 751574.

Connector

(B8200JQ)

Four load resistors*

(B8200JR)

connected inparallel

DC power supply (±15 V, 1 A)

Power meter’s current input terminals

Measurement using clamp-on probe

758921

Power meter’s voltage input terminal

758921

Power meter’s current direct input terminal

Unit whose voltage is to be measured

751552

Current output type

758917

Current measurement using direct input terminal

Unit whose voltage is to be measured

758923

758931

Measurement using voltage input terminal

Unit whose current is to be measured

701959

758921

758922

758929

758917

758923

758931

Power meter’s voltage input terminal

SUPPORTS Crest Factor 6

The crest factor is the ratio of the waveform peak value and the RMS value.

Crest factor

(CF, peak factor)

waveform peak

RMS value

waveform peak

RMS value

When checking the measurable crest factor of our power measuring instruments, please refer to the following equation.

Crest factor (CF) =

* However, the peak value of the measured signal must be less than or equal to the continuous maximum allowed input

* The crest factor on a power meter is specified by how many times peak input value is allowed relative to rated input value. Even if some measured signals exist whose crest factors are larger than the specifications of the instrument (the crest factor standard at the rated input), you can measure signals having crest factors larger than the specifications by setting a

{measuring rangeCF setting (3 or 6)}

measured value (RMS)

measurement range that is large relative to the measured signal. For example, even if you set CF = 3, CF5 or higher measurements are possible as long as the measured value (RMS) is 60% or less than the measuring range. Also, for a setting of CF = 3, measurements of CF = 300 are possible with the minimum effective input (1% of measuring range).

Comparison of Specifications and Functions in WT3000, Other WT Series Models

Basic power accuracy (50/60 Hz) Measurement power bandwidth Input elements

Voltage range

Range

Current range

Guaranteed accuracy range for voltage and current ranges Main measurement parameters Peak hold (instantaneous maximum value hold) MAX hold Voltage RMS/MEAN simultaneous measurement RMS/MEAN/AC/DC simultaneous measurement Mean active power

Measurement

parameters

resolution

Measurement/

There are limitations on some specifications and functions. See the individual product catalogs for details.

Active power amount (WP) Apparent power amount (WS) Reactive power amount (WQ) Frequency Efficiency Phase angle between phases (fundamental wave) Motor evaluation FFT spectral analysis User-defined functions Voltage, current, power

Display

Power amount, current amount Frequency Display Display format

Display

Sampling frequency Harmonic measurement Dual Harmonic Measurement Harmonic measurement in normal measurement mode IEC standards-compliant harmonic measurement Flicker measurement Cycle by cycle measurement

functions

Compensation function Delta calculation function DA output Synchronized operation

Storage (internal memory for storing data)

Interfaces

Communication command compatibility

Other

Communication command standards

features

Data updating interval Removable storage Printer

Direct input

External sensor input

WT3000

0.02% of reading + 0.04% of range DC, 0.1 Hz to 1 MHz

15/30/60/100/150/300/600/1000[V] (when crest factor is 3)

7.5/15/30/50/75/150/300/500[V] (when crest factor is 6)

5m/10m/20m/50m/100m/200m/500m/1/2 [A] (when crest factor is 3)

Select from 0.25/0.5/1/2.5/5/10/15[A] or

2.5/5m/10m/25m/50m/100m/250m/500m/1 [A] (when crest factor is 6) 50m/100m/200m/500m/1/2/5/10[V] (when crest factor is 3)

25m/50m/100m/250m/500m/1/2.5/5[V] (when crest factor is 6)

Voltage, current, active power, reactive power, apparent power, power factor, phase angle, peak voltage, peak current, crest factor

2 channels (up to 8 channels with option /FQ)

Torque, rotating speed input (motor version)(opt.)

Numerical values, waveforms, trends, bar graphs, vectors

(/G6)(opt.)(10cycle/50Hz, 12cycle/60Hz)

VGA output (/V1)(opt.); Ethernet (/C7)(opt.)

1, 2, 3, 4

Select from 0.5/1/2/5/10/20/30[A] or

1% to 130%

✓

✓ (ASSP)

✓ (user-defined function)

✓

(/G6)(opt.)

✓ (20 functions)

600,000 999,999

99,999

8.4-inch TFT color LCD

Approximately 200 kS/s

(/G6)(opt.)

(/FL)(opt.)

(/CC)(opt.)

✓

(/DT)(opt.)

20 channels (/DA)(opt.)

✓

approximately 30MB

GP-IB; RS-232 (/C2)(opt.); USB (/C12)

Commands in IEEE488.2 standard

50m/100m/250m/500m/1/2/5/10/20[S]

PC card interface; USB (/C5)(opt.)

Built-in printer (front side) (/B5)(opt.)

None (communication commands vary from product to product)

1.5/3/6/10/15/30/60/100/150/300/600/1000[V] (when crest factor is 3) 750m/1.5/3/5/7/5/15/30/50/75/150/300/500[V] (when crest factor is 6)

Select from 10m/20m/50m/100m/200m/500m/1/2/5[A]

or 1/2/5/10/20/50[A] (when crest factor is 3) 5m/10m/25m/50m/100m/250m/500m/1/2.5[A] or 0.5/1/2.5/5/10/25[A] (when crest factor is 6)

50m/100m/250m/500m/1/2.5/5/10[V] (when crest factor is 3)

25m/50m/125m/250m/500m/1.25/2.5/5[V] (when crest factor is 6)

Numerical values, waveforms, trends, bar graphs, vectors

WT1800

0.1% of reading + 0.05% of range DC, 0.1 Hz ~ 1 MHz

1, 2, 3, 4, 5, 6

1% to 110%

✓

✓(user-defined function)

✓

3 ch (up to 12 channels with option /FQ)

Torque and rotational velocity input(opt.)

Commands in IEEE488.2 standard

50m/100m/250m/500m/1/2/5/10/20[S]

✓

✓ (20)

60,000

999,999

99,999

8.4-inch TFT color LCD (XGA)

Approximately 2 MS/s

(/G5)(opt.) (/G6)(opt.)

(/DT)(opt.)

20 channels (/DA)(opt.)

✓

Approximately 32MB

GPIB, USB, Ethernet,

RGBOutput(V1)

䊊 USB

Built-in printer (front side)(opt.)

(opt.):Optional

Precision Power Analyzer WT3000

WT3000 SPEC

WT3000 Specifications

Inputs

Item Specification Input terminal type Voltage

Input type Voltage

Measurement range Voltage (rated value) 15 V, 30 V, 60 V, 100 V, 150 V, 300 V, 600 V, 1000 V (for crest factor

Input impedance Voltage

Instantaneous maximumVoltage allowable input Peak value of 2500 V or RMS value of 1500 V, whichever is less. (1s or less) Current (2A input element)

Continuous maximum Voltage allowable input Peak value of 1600 V or RMS value of 1100 V, whichever is less.

Continuous maximum common mode voltage (50/60 Hz)

Rated voltage to ground Voltage input terminals, current input terminals

Influence from common mode voltage

Plug-in terminal (safety terminal) Current

• Direct input: Large binding post

• External sensor input: Insulated BNC connector

Floating input, resistive potential method Current Floating input, shunt input method

7.5 V, 15 V, 30 V, 50 V, 75 V, 150 V, 300 V, 500 V (for crest factor 6) Current (2A input element)

• Direct input: 5mA, 10mA, 20mA, 50mA, 100mA, 200mA, 500mA, 1A, 2A (for crest factor 3)

2.5mA, 5mA, 10mA, 25mA, 50mA, 100mA, 250mA, 500mA, 1A (for crest factor 6)

• External sensor input: 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, and 10 V (for crest factor 3) 25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1 V, 2.5 V, and 5 V (for crest factor 6) Current (30A input element)

• Direct input: 500 mA, 1 A, 2 A, 5 A, 10 A, 20 A, and 30 A (for crest factor 3) 250 mA, 500 mA,1 A, 2.5 A, 5 A, 10 A, and 15 A (for crest factor

• External sensor input: 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, and 10 V (for crest factor 3) 25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1 V, 2.5 V, and 5 V (for crest factor 6)

Input resistance: Approx. 10 MΩ, input capacitance: Approx. 5 pF Current (2A input element)

•Direct input: Approx. 500 mΩ + approx. 0.07 µ H

• External sensor input: Input resistance: Approx. 1 MΩ, input capacitance: Approx. 40 pF

Current (30A input element)

• Direct input: Approx. 5.5 mΩ + approx. 0.03 µ H

• External sensor input: Input resistance: Approx. 1 MΩ, input capacitance: Approx. 40 pF

•Direct input: Peak value of 9 A or RMS value of 3 A, whichever is less.

• External sensor input: Peak value less than or equal to 10 times the measurement range.

Current (30A input element)

• Direct input: Peak value of 150 A or RMS value of 50 A, whichever is less.

• External sensor input: Peak value less than or equal to 10 times the measurement range.

Current (2A input element)

•Direct input: Peak value of 6 A or RMS value of 2.2 A, whichever is less.

•External sensor input: Peak value less than or equal to 5 times the measurement range.

Current (30A input element)

• Direct input: Peak value of 90 A or RMS value of 33 A, whichever is less.

•External sensor input: Peak value less than or equal to 5 times the measurement range.

Voltage input terminals, current input terminals 1000 Vrms External current sensor input connector 600 Vrms

1000 V External current sensor input connector 600 V

Apply 1000 Vrms with the voltage input terminals shorted and the current input terminals open.

• 50/60 Hz: ±0.01% of range or less

• Reference value up to 200 kHz

Voltage:

±3/range × f% of range or less. However, 3% or less. Current direct input and current sensor input: ± (max. range/range)× 0.001 × f% of range or less. However, 0.01% or more. The units of f are kHz. The max. range

Line filter Select OFF, 500 Hz, 5.5 kHz, or 50 kHz. Frequency filter Select OFF, or ON A/D converter Simultaneous voltage and current conversion and 16-bit resolution.

Range switching Can be set for each input element. Auto range functions Increasing range value

within equations is 30 A or 2 A or 10 V.

Conversion speed (sampling rate): Approximately 5 µs. See harmonic measurement items for harmonic display.

• When the measured values of U and I exceed 110% of the range rating

• When the peak value exceeds approximately 330% of the range rating (or approximately 660% for crest factor 6)

Decreasing range value

•When the measured values of U and I fall to 30% or less of the range rating, and Upk and Ipk are 300% or less of the lower range value (or 600% for crest factor 6)

Display

Display 8.4-inch color TFT LCD monitor Total number of pixels* 640 (horiz.) x 480 (vert.) dots Waveform display resolution

Same as the data update rate. Exceptions are listed below.

• The display update interval of numeric display (4, 8, and 16 items) is 250 ms when the data update rate is 50 ms or 100 ms.

• The display update interval of numeric display (ALL, Single List, and Dual List) is 500 ms when the data update rate is 50 ms to 250 ms.

• The display update rate of the trend display, bar graph display, and vector display is 1 s when the data update rate is 50 ms to 500 ms.

• The display update interval of the waveform display is approximately 1 s when the data update rate is 50 ms to 1 s. However, it may be longer depending on the trigger setting.

* Up to 0.02% of the pixels on the LCD may be defective.

501 (horiz.) x 432 (vert.) dots

Calculation Functions

Single-phase,

3 wire UΣ [V] IΣ [A] PΣ [W] SΣ [VA]

QΣ [var]

PcΣ [W] WPΣ [Wh] WP+Σ [Wh] WP–Σ [Wh] qΣ [Ah] q+Σ [Ah] q–Σ [Ah] WQΣ [varh]

WSΣ [VAh]

λΣ

ØΣ [˚]

Note1) The instrument’s apparent power (S), reactive power (Q), power factor (l), and phase

angle (Ø) are calculated using measured values of voltage, current, and active power. (However, reactive power is calculated directly from sampled data when TYPE3 is selected.) Therefore, when distorted waveforms are input, these values may be different from those of other measuring instruments based on different measuring principals.

Note 2) The value of Q in the QΣ calculation is calculated with a preceding minus sign (-) when

the current input leads the voltage input, and a plus sign when it lags the voltage input, so the value of QΣ may be negative.

η [%] User-defined functions

F1–F20

(U1+U2)/2

(I1+I2)/2

P1+P2

S1+S2

TYPE1, TYPE2 TYPE3

TYPE1

Q1+Q2

TYPE2

Q1+Q2

TYPE3

Pc1

WP1

WP–1

q–1

1 N

QΣ(

1 N

SΣ(

PΣ SΣ

cos

Set a efficiency calculation up to 4

Create equations combining measurement function symbols, and calculate up to twenty numerical data.

3 phase, 3 wire

(S1+S2)

PΣ

+QΣ

SΣ2–PΣ

Pc2

WP2

1+WP+2

WP–2

1+q+2

q-2

| QΣ(n) | ×Time

n=1

) is the nth reactive power Σ function , and N is the number of data updates.

SΣ(n)×Time

n=1

) is the nth apparent power Σ function, and N is the number of data updates.

PΣ

-1

( )

SΣ

Waveform Display (WAVE display)

Waveform display items

Voltage and current from elements 1 through 4 Motor version torque and waveform of revolution speed

3 phase, 3 wire

(3 voltage 3 current) (U1+U2+U3)/3 (I1+I2+I3)/3

(S1+S2+S3)

3 phase, 4 wire

P1+P2+P3 S1+S2+S3

Q1+Q2+Q3

Q1+Q2+Q3 Pc1

Pc2+Pc3

WP1

WP2+WP3 WP+1+WP+2+WP+3 WP-1+WP-2+WP-3 q1+q2+q3 q

1+q+2+q+3

q-2+q-3

q-1

Accuracy

[Conditions] *These conditions are all accuracy condition in this section. Temperature: 23±5°C, Humidity: 30 to 75%RH, Input waveform: Sine wave, Common mode voltage:0 V, Crest factor: 3, Line filter: OFF, λ (power factor): 1, After warm-up. After zero level, compensation or range value change while wired. f is frequency (kHz), 6month

30A input element, 2A input element (500mA, 1A, 2A range), Voltage input

0.1Hzf30Hz 30Hzf45Hz 45Hzf66Hz 66Hzf1kHz 1kHzf10kHz 10kHzf50kHz 50kHzf100kHz 100kHzf500kHz 500kHzf1MHz

U: Voltage, sensor: external sensor input, 2A: 500mA, 1A, 2A range of 2A direct current input, 30A: 30A direct current input

2A input element (5mA, 10mA, 20mA, 50mA, 100mA, 200mA range)

0.1Hzf30Hz 30Hzf45Hz 45Hzf66Hz 66Hzf1kHz 1kHzf10kHz 10kHzf50kHz 50kHzf100kHz 100kHzf500kHz 500kHzf1MHz

U: Voltage, sensor: external sensor input, direct: direct current input

* The units of f in the reading error equation are kHz. 30A input element/2A input element

•For temperature changes after zero level compensation or range change, add 0.2mA/°C to the DC accuracy of the 30A input element.

•For temperature changes after zero level compensation or range change, add 2uA/°C to the DC accuracy of the 2A input element.

•For temperature changes after zero-level compensation or range change on the external current sensor input, add 0.02 mV/°C to the DC accuracy of the external current sensor input.

• Accuracy of waveform display data, Upk and Ipk Add 3% of range to the accuracy above. However, add 3% of range +5mV for external input(reference value). Effective input range is within ±300% (within ±600% for crest factor 6)

• Influenced by changes in temperature after zero level correction or range value changes. Add 50ppm of range/°C to the voltage DC accuracy, 0.2 mA/°C to the 30A input current DC accuracy, 3µA/°C to the 2A current accuracy, 0.02 mV/°C to the external current DC accuracy, and influence of voltage times influence of current to the power DC accuracy.

30A input element

For self-generated heat caused by current input on an DC input signal, add 0.00002  I reading + 3  I generated heat continues until the temperature of the shunt resistor inside the WT3000 lowers even if the current input changes to a small value.

2A input element

For self-generated heat caused by current input on an DC input signal, add 0.004  I

reading + 6  I generated heat continues until the temperature of the shunt resistor inside the WT3000 lowers even if the current input changes to a small value.

• Additions to accuracy according to the data update rate Add 0.05% of reading when it is 100 ms, and 0.1% of reading when 50ms.

• Range of guaranteed accuracy by frequency, voltage, and current

All accuracies between 0.1 Hz and 10 Hz are reference values.

If the voltage exceeds 750 V at 30 kHz–100 kHz, or exceeds {2.2 x 10 MHz, the voltage and power values are reference values. If the current exceeds 20 A at DC, 10 Hz–45Hz, or 400 Hz–200 kHz; or if it exceeds 10 A at 200 kHz–500 kHz; or exceeds 5 A at 500 kHz–1 MHz, the current and power accuracies are reference values.

• Accuracy for crest factor 6: Range accuracy of crest factor 3 for two times range.

uA to the current accuracy. I is the current reading (A). The influence from self-

Voltage/current

0.05% of reading+0.05% of range (U, 30A, Sensor)

0.05% of reading+0.05% of range+2uA (2A)

0.1% of reading+0.2% of range

0.03% of reading+0.05% of range

0.01% of reading+0.03% of range

0.03% of reading+0.05% of range

0.1% of reading+0.05% of range

0.3% of reading+0.1% of range

0.012f% of reading+0.2% of range

0.009f% of reading+0.5% of range (0.022f–7)% of reading+1% of range

Current

0.05% of reading+0.05% of range (sensor)

0.05% of reading+0.05% of range+2uA (direct)

0.1% of reading+0.2% of range

0.03% of reading+0.05% of range

0.1% of reading+0.05% of range

0.3% of reading+0.1% of range

0.012f% of reading+0.2% of range

0.009f% of reading+0.5% of range (0.022f–7)% of reading+1% of range

0.05% of reading+0.1% of range

0.05% of reading+0.1% of range+2µAU reading (2A)

0.2% of reading+0.3% of range

0.05% of reading+0.05% of range

0.02% of reading+0.04% of range

0.05% of reading+0.05% of range

0.15% of reading+0.1% of range

0.3% of reading+0.2% of range

0.014f% of reading+0.3% of range

0.012f% of reading+1% of range (0.048f–19)% of reading+2% of range

0.05% of reading+0.1% of range (sensor)

0.05% of reading+0.1% of range+2uAV reading (direct)

0.2% of reading+0.3% of range

0.05% of reading+0.05% of range

0.15% of reading+0.1% of range

0.3% of reading+0.2% of range

0.014f% of reading+0.3% of range

0.012f% of reading+1% of range (0.048f–19)% of reading+2% of range

Power

% of

/ f(kHz)}V at 100 kHz–1

Voltage/current

Total power error with respect to the range for an arbitrary power factor λ (exclude λ = 1)

When cutoff frequency is 500 Hz "45 to 66Hz: Add 0.2% of reading Under 45 Hz: Add 0.5% of reading"

Influence of line filter

Lead/Lag Detection (d (LEAD)/G (LAG) of the phase angle and symbols for the reactive power Q∑ calculation) * The s symbol shows the lead/lag of each element, and "-" indicates leading.

Temperature coefficient

Effective input range

Max. display 140% of the voltage and current range rating

Min. display

Measurement lower limit frequency

Accuracy of apparent power S

Accuracy of reactive power Q

Accuracy of power factor

Accuracy of phase difference Ø

One-year accuracy Add the accuracy of reading error (Six-month) × 0.5 to the accuracy

When cutoff frequency is 5.5 kHz "66Hz or less: Add 0.2% of reading 66 to 500Hz: Add 0.5% of reading" When cutoff frequency is 50 kHz "500Hz or less: Add 0.2% of reading 500 to 5kHz: Add 0.5% of reading"

The phase lead and lag are detected correctly when the voltage and current signals are both sine waves, the lead/lag is 50% of the range rating (or 100% for crest factor

6), the frequency is between 20 Hz and 10 kHz, and the phase angle is ± (5˚ to 175˚) or more.

±0.02% of reading/˚C at 5–18˚ or 28–40 ˚C.

Udc and Idc are 0 to ±130% of the measurement range Urms and Irms are 1 to 130%* of the measurement range (or 2%–130% for crest factor 6) Umn and Imn are 10 to ±130% of the measurement range Urmn and Irmn are 10 to ±130%* of the measurement range Power is 0 to ±130%* for DC measurement, 1 to 130%* of the voltage and current range for AC measurement, and up to ±130%* of the power range. However, when the data update rate is 50 ms, 100 ms, 5 sec, 10 sec, or 20 sec, the synchronization source level falls below the input signal of frequency measurement. * 110% for maximum range of direct voltage and current inputs. The accuracy at 110 to 130% of the measurement range is the reading error ×1.5.

Urms and Irms are up to 0.3% relative to the measurement range (or up to 0.6% for a crest factor of 6). Umn, Urmn, Imn, and Irmn are up to 2% (or 4% for a crest factor of 6). Below that, zero suppress. Current integration value q also depends on the current value. Data update rate 50ms

Measurement lower limit frequency

Voltage accuracy + current accuracy

Accuracy of apparent power +( (1.0004–λ

± [(λ–λ/1.0002)+ |cosØ–cos{Ø+sin λ=0%/100)}|] ±1digit when voltage and current is at rated input of the measurement

range. Ø is the phase difference of voltage and current. ± [|Ø–cos

deg ±1digit when voltage and current is at rated input of the measurement range

six-month

—

100ms

45Hz

25Hz

) – (1–λ2) ) ×100% of range

-1

(λ/1.0002)| + sin–1 {(influence of power factor of power when λ=0%)/100}]

When λ=0 (500mA to 30A range) Apparent power reading×0.03% in the 45 to 66 Hz range All other frequencies are as follows (however, these are only reference values): Apparent power reading× (0.03+0.05×f(kHz))% When λ=0 (5mA to 200mA range) Apparent power reading×0.1% in the 45 to 66 Hz range All other frequencies are as follows (however, these are only reference values): Apparent power reading× (0.1+0.05×f(kHz))% 0 < λ < 1 (45 Hz to 66 Hz) (Power reading) × [(power reading error %) + (power range error %) × (power range /apparent power indication value) + [tanϕ × (influence when λ = 0) %}. ϕ is the phase angle between the voltage and current. Value of “influence % when λ=0” will be changed by frequency according to above expressions.

When cutoff frequency is 500 Hz "45 to 66Hz: Add 0.3% of reading Under 45 Hz: Add 1% of reading" When cutoff frequency is 5.5 kHz "66Hz or less: Add 0.3% of reading 66 to 500Hz: Add 1% of reading" When cutoff frequency is 50 kHz "500Hz or less: Add 0.3% of reading 500 to 5kHz: Add 1% of reading"

250ms

500ms

20Hz

10Hz1s5Hz2s2Hz5s0.5Hz

-1

(influence of power factor of power when

Power

10s

0.2Hz

20s

0.1Hz

Precision Power Analyzer WT3000

Functions

Measurement method Digital multiplication method Crest factor 3 or 6 (when inputting rated values of the measurement

Measurement period Interval for determining the measurement function and

Wiring You can select one of the following five wiring settings.

Compensation Functions • Efficiency Compensation

Scaling When inputting output from external current sensors, VT, or

Input filter Line filter or frequency filter settings can be entered. Averaging • The average calculations below are performed on the normal

Data update rate Select 50 ms, 100 ms, 250 ms, 500 ms, 1 s, 2 s, 5 s, 10 s, or

Response time At maximum, two times the data update rate (only during

Hold Holds the data display. Single Executes a single measurement during measurement hold. Zero level compensation/Null Compensates the zero level.

range), and 300 relative to the minimum valid input. However,

1.6 or 3.2 at the maximum range (when inputting rated values of the measurement range), and 160 relative to the minimum valid input.

performing calculations. Period used to determine and compute the measurement function.

• The measurement period is set by the zero crossing of the reference signal (synchronization source) when the data update interval is 50 ms, 100 ms, 5 s, 10 s, or 20 s (excluding watt hour WP as well as ampere hour q during DC mode).

• Measured through exponential averaging on the sampled data within the data update interval when the data update interval is 250 ms, 500 ms, 1 s, or 2 s.

• For harmonic measurement, the measurement period is from the beginning of the data update interval to 9000 points at the harmonic sampling frequency.

1P2W (single phase, two-wire), 1P3W (single phase, 3 wire), 3P3W (3 phase, 3 wire), 3P4W (3 phase, 4 wire), 3P3W(3V3A) (3 phase, 3 wire, 3 volt/3 amp measurement). However, the number of available wiring settings varies depending on the number of installed input elements. Up to four, or only one, two, or three wiring settings may be available.

Compensation of instrument loss during efficiency calculation

• Wiring Compensation Compensation of instrument loss due to wiring

• 2 Wattmeter Method Compensation (/DT option) Compensation for 2 wattmeter method

CT, set the current sensor conversion ratio, VT ratio, CT ratio, and power coefficient in the range from 0.0001 to 99999.9999.

measurement parameters of voltage U, current I, power P, apparent power S, reactive power Q. Power factor l and phase angle Ø are determined by calculating the average of P and S. Select exponential or moving aver aging.

• Exponential average Select an attenuation constant of 2, 4, 8, 16, 32, or 64.

• Moving average Select the number of averages from 8, 16, 32, 64, 128, or 256.

• The average calculations below are performed on the harmonic display items of voltage U, current I, power P, apparent power S, reactive power Q. Power factor l is determined by calculating the average of P and Q. Only exponential averaging is performed. Select an attenuation constant of 2, 4, 8, 16, 32 or 64

20 s.

numerical display)

Integration

Mode Select a mode of Manual, Standard, Continuous (repeat),

Timer Integration can be stopped automatically using the integration

Count over If the count over integration time reaches the maximum

Accuracy ± [power accuracy (or current accuracy) + time accuracy] Time accuracy ± 0.02% of reading Remote control EXT START, EXT STOP, EXT RESET, EXT HOLD, EXT

Real Time Control Standard, or Real Time Control Continuous (Repeat).

timer setting. 0000h00m00s~10000h00m00s

integration time (10000 hours), or if the integration value reaches max/min display integration value (±999999 M), the elapsed time and value is saved and the operation is stopped.

SINGLE and EXT PRINT (all input signal) / INTEG BUSY (output signal). Requires /DA option.

Display

• Numerical display function

Display resolution 600000 Number of display items Select 4, 8, 16, all, single list, or dual list.

• Waveform display items

No. of display rasters 501 Display format Peak-peak compressed data Time axis Range from 0.5 ms–2 s/div. However, it must be 1/10th of the

data update rate.

Triggers

Trigger T ype Edge type Trigger Mode Select Auto or Normal. Triggers are turned OFF automatically

Trigger Source Select voltage, current, or external clock for the input to each

Trigger Slope Select (Rising), (Falling), or (Rising/Falling). Trigger Level When the trigger source is the voltage or current input to the

Ver tical axis Zoom Voltage and current input to the waveform vertical axis zoom

ON/OFF ON/OFF can be set for each voltage and current input to the

Format You can select 1, 2, 3 or 4 splits for the waveform display. Interpolation Select dot or linear interpolation. Graticule Select graticule or cross-grid display. Other display ON/OFF Upper/lower limit (scale value), and waveform label ON/OFF. Cursor measurements When you place the cursor on the waveform, the value of that

Zoom function No time axis zoom function * Since the sampling frequency is approximately 200 kHz, waveforms that can be accurately

reproduced are those of about 10 kHz.

• Vector Display/Bar Graph Display

Vector display Vector display of the phase difference in the fundamental

Bar graph display Displays the size of each harmonic in a bar graph.

• Trend display

Number of measurement channels Up to 16 parameters

• Simultaneous display Two windows can be selected (from numerical display,

during integration.

input element.

input elements. Set in the range from the center of the screen to ±100% (top/bottom edge of the screen). Setting resolution:

0.1% When the trigger source is Ext Clk, TTL level.

input element can be zoomed along the vertical axis. Set in the range of 0.1 to 100 times.

input element.

point is measured.

waves of voltage and current.

Displays trends (transitions) in numerical data of the measurement functions in a sequential line graph.

waveform display, bar graph display, or trend display) and displayed in the upper and lower parts of the screen.

Saving and Loading Data

Settings, waveform display data, numerical data, and screen image data can be saved to media.* Saved settings can be loaded from a medium.

* PC card, USB memory (/C5 option)

Store function

Internal memory size Approximately 30 MB Store interval (waveform OFF) Maximum 50msec to 99 hour 59 minutes 59 seconds. Guideline for Storage Time (Waveform Display OFF, Integration Function OFF)

Number of

measurement

channels

2ch 2ch 4ch 4ch

Note: Depending on the user-defined math, integration, and other settings, the actual measurement time may be shorter than stated above. Store function can’t use in combination with auto print function.

Measured Items

(Per CH)

3 10 10 20

Storage Interval

50 ms

1 sec

50 ms

1 sec

Storable Amnt. of Data

Approx. 10 hr 20 m

Approx. 86 hr

Approx. 2 hr 30 m

Approx. 24 hr

Motor Evaluation Function (-MV, Motor Version)

Measurement Function Rotating speed

Tor que

SyncSp

Slip[%]

Motor output Pm

Method of Determination, Equation When the input signal from the revolution sensor is DC voltage (analog signal)

Input voltage from revolution sensor x scaling factor

Scaling factor: Number of revolutions per 1 V input voltage

When the input signal from the revolution sensor is number of pulses

Number of input pulses from revolution sensor per minute

When the type of input signal from the torque meter is DC voltage (analog signal)

When the type of input signal from the torque is number of pulses Enter N·m equivalent to upper- and lower-limit frequencies to determine an inclination from these two frequencies, and then multiply the number of pulses.

Number of pulses per rotation

Input voltage from torque meter x scaling factor

Scaling factor: Torque per 1 V input voltage

120 x freq. of the freq. meas. source

motor’s number of poles

SyncSp-Speed

2π×Speed×Tor que

SyncSp

×100

×scaling factor

×Scaling factor

Approx. 7.0 V

5.0V

Integration time

t0:Rated time of integrated D/A output for manual integration mode,

specified time of timer for normal integration and repetitive (continuous) integration modes

D/A output

Input that is 140% of the rating

Rated input

Revolution signal, torque signal

• When revolution and torque signals are DC voltage (analog input) Connector type Insulated BNC connector Input range 1 V ,2 V,5 V,10 V,20 V Effective input range 0%–±110% of measurement range Input resistance Approximately 1 MΩ Continuous maximum allowed input ±22 V Continuous maximum common mode voltage ±42 Vpeak or less Accuracy ±(0.1% of reading+0.1% of range) Temperature coefficient ±0.03% of range/°C

• When revolution and torque signals are pulse input Connector type Insulated BNC connector Frequency range 2 Hz–200 kHz Amplitude input range ± 12 Vpeak Effective amplitude 1 V (peak-to peak) or less Input waveform duty ratio 50%, square wave Input resistance Approximately 1 MΩ Continuous maximum common mode voltage ±42 Vpeak or less Accuracy ±(0.05% of reading+1mHz)

Integrated Value

Other Items

Displayed Value

Note that PF and deg are not output beyond the range of ±5.0 V. If an error occurs, approximately ±7.5 V are output. 0° to 360° are output at 0 to 5.0 V; LAG180° to LEAD180° are output at -5.0 V to 5.0 V.

140% 100%

–100% –140%

Approx. 7.0 V

Approx. –7.0 V

Output

5.0 V

–5.0 V

D/A output

Approx. 7.5 V Approx. 7.0 V

0 V

–140

–100

5.0 V

100

140

–5.0 V

Approx. –7.0 V Approx. –7.5 V

Displayed value [%]

Added Frequency Measurement (/FQ Optional)

Device under measurement Select up to two frequencies of the voltage or current input to

Measurement method Reciprocal method Measurement range Data Update Rate Measuring Range

Accuracy ±0.05% of reading

Delta Calculation Function (/DT Optional)

Voltage(V)

Current (A)

D/A Output (/DA Optional)

D/A conversion resolution 16 bits Output voltage ±5 V FS (max. approximately ±7.5 V) for each rated value Update rate Same as the data update rate on the main unit. Number of outputs 20 channels (each channel can be set separately) Accuracy ± (accuracy of a given measurement function + 0.1% of FS)

D/A zoom Setting maximum and minimum values. Continuous maximum common mode voltage ±42Vpeak or less Minimum load 100 kΩ Temperature coefficient ±0.05% of FS/°C Remote control EXT START, EXT STOP, EXT RESET, EXT HOLD, EXT

Frequency (Simplified Figure Below)

Item difference 3P3W→3V3A

DELTA→STAR

STAR→DELTA

difference 3P3W→3V3A DELTA→STAR STAR→DELTA

the input elements for measurement. If the frequency option (/ FQ) is installed, the frequencies of the voltages and currents being input to all input elements can be measured.

50ms 45Hzf1MHz 100ms 25Hzf1MHz 250ms 10Hzf500kHz 500ms 5Hzf200kHz 1s 2.5Hzf100kHz 2s 1.5Hzf50kHz 5s 0.5Hzf20kHz 10s 0.25Hzf10kHz 20s 0.15Hzf5kHz

When the input signal levels are greater than or equal to 25 mV (current external sensor input), 1.5mA (current direct input of 2A input element) and 150 mA (current direct input of 30A input element) respectively, and the signal is greater than or equal to 30% (0.1 Hz–440 Hz, frequency filter ON), 10% (440 Hz–500 kHz), or 30% (500 kHz–1 MHz) of the measurement range. However, when the measuring frequency is smaller or equal to 2 times of above lower frequency, the input signal is greater than or equal to 50%. Add 0.05% of reading when current external input is smaller than or equal to 50 mV input signal level for each is double for crest factor 6.

Specifications

U1: Differential voltage determined by computation u1 and u2 U1: Line voltage that are not measured but can be computed for a three-

phase, three-wire system U1, U2, U3: Line voltage that can be computed for a three phase, three-wire (3V3A) system U1, U2, U3: Neutral line voltage that can be computed for a threephase, four-wire system I1: Differential current determined by computation Phase current that are not measured but can be computed Neutral line current Neutral line current

FS = 5V

SINGLE and EXT PRINT (all input signal) / INTEG BUSY (output signal) Requires /DA option

D/A output

Approx. 7.5 V

5.0V

2.5V

0.5V

0.5Hz 1Hz 10Hz 100Hz 10kHz

1kHz

100kHz

1MHz

Displayed value

Built-in Printer (/B5 Optional)

Printing method Thermal line-dot Dot density 8 dots/mm Paper width 112 mm Effective recording width 104 mm Recorded information Screenshots, list of measured values, harmonic bar graph

Auto print function Measured values are printed out automatically.

printouts, settings

However, auto print function can’t use in combination with store function.

RGB Video Signal (VGA) Output Section (/V1 Optional)

Connector type 15-pin D-Sub (receptacle) Output format VGA compatible

Advanced Calculation (/G6 optional)

• Wide Bandwidth Harmonic Measurement

Item Specifications Measured source All installed elements Format PLL synchronization method (when the PLL source is not set to

Frequency range • PLL synchronization method

PLL source • Select the voltage or current of each input element (external

FFT data length 9000 FFT processing word 32 bits length Window function Rectangular Anti-aliasing filter Set using a line filter (OFF, 500 Hz, 5.5 kHz, or 50 kHz).

Sample rate (sampling frequency), window width, and upper limit of measured order

PLL source synchronization method

Fundamental

Frequency of the

PLL Source

(Hz) 10 to 20 20 to 40 40 to 55 55 to 75

75 to 150

150 to 440

440 to 1100

1100 to 2600

External sampling clock method

Fundamental

Frequency of the

PLL Source

(Hz)

0.1 to 66

Smp Clk) or external sampling clock method (when the PLL source is set to Smp Clk)

Fundamental frequency of the PLL source is in the range of 10 Hz to 2.6 kHz.

• External sampling clock method Input a sampling clock signal having a frequency that is 3000 times the fundamental frequency between 0.1 Hz and 66 Hz of the waveform on which to perform harmonic measurement. The input level is TTL. The input waveform is a rectangular wave with a duty ratio of 50%.

current sensor range is greater than or equal to 500 mV) or the external clock (Ext Clk or Smp Clk).

• Input level Greater than or equal to 50% of the measurement range rating when the crest factor is 3 Greater than or equal to 100% of the measurement range rating when the crest factor is 6

•Turn the frequency filter ON when the fundamental frequency is less than or equal to 440 Hz.

Sample Rate

(S/s)

Window Width against

the FFT Data Length

Upper Limit of the

Measured Order

(Frequency of the

Fundamental Wave) f × 3000 f × 1500

f × 900 f × 750 f × 450 f × 360 f × 150

f × 60

Sample Rate

(S/s)

6 10 12 20 25 60

150

Window Width against

the FFT Data Length

100 100 100 100

62 62 62 20

Upper Limit of the

Measured Order

(Frequency of the

Fundamental Wave)

f × 3000

100

Precision Power Analyzer WT3000

Accuracy

• When the line filter (500 Hz) is ON Frequency

0.1 Hz  f  10 Hz 10 Hz  f  30 Hz 30 Hz  f  66 Hz

• When the line filter (5.5 kHz) is ON Frequency

0.1 Hz  f  10 Hz 10 Hz  f  30 Hz 30 Hz  f  66 Hz 66 Hz  f  440 Hz 440 Hz  f  1 kHz 1 kHz  f  2.5 kHz

2.5 kHz  f  3.5 kHz

If the fundamental frequency is between 1 kHz and 2.6 kHz

Add 0.5% of reading to the voltage and current accuracy for frequencies greater than 1 kHz. Add 1% of reading to the power accuracy for frequencies greater than 1 kHz.

• When the line filter (50 kHz) is ON Frequency

0.1 Hz  f  10 Hz 10 Hz  f  30 Hz

30 Hz  f  440 Hz 440 Hz  f  1 kHz

1 kHz  f  5 kHz

5 kHz  f  10 kHz

If the fundamental frequency is between 1 kHz and 2.6 kHz

Add 0.5% of reading to the voltage and current accuracy for frequencies greater than 1 kHz. Add 1% of reading to the power accuracy for frequencies greater than 1 kHz.

• When the line filter is OFF Frequency

0.1 Hz  f  10 Hz 10 Hz  f  30 Hz 30 Hz  f  1 kHz 1 kHz  f  10 kHz 10 kHz  f  55 kHz

• If the fundamental frequency is between 400 Hz and 1 kHz

Add 1.5% of reading to the voltage and current accuracy for frequencies greater than 10 kHz. Add 3% of reading to the power accuracy for frequencies greater than 10 kHz.

•If the fundamental frequency is between 1 kHz and 2.6 kHz

Add 0.5% of reading to the voltage and current accuracy for frequencies greater than 1 kHz and less than or equal to 10 kHz. Add 7% of reading to the voltage and current accuracy for frequencies greater than 10 kHz. Add 1% of reading to the power accuracy for frequencies greater than 1 kHz and less than equal to 10 kHz. Add 14% of reading to the power accuracy for frequencies greater than 10 kHz.

However, all the items below apply to all tables.

• When the crest factor is set to 3

• When λ (power factor) = 1

•Power figures that exceed 440 Hz are reference values.

•For external current sensor range, add 0.2 mV to the current accuracy and add (0.2 mV/

external current sensor range rating)×100% of range to the power accuracy.

•For 30A direct current input range, add 0.2 mA to the current accuracy and add (0.2 mA/

direct current input range rating)×100% of range to the power accuracy.

•For 2A direct current input range, add 2 µA to the current accuracy and add (2 µA/direct

current input range rating) × 100% of range to the power accuracy.

•For n

order component input, add {n/(m+1)}/50% of (the nth order reading) to the n+m order and n-mth order of the voltage and current, and add {n/(m+1)}/25% of (the nth order reading) to the n+mth order and n-mth order of the power.

• Add (n/500)% of reading to the nth component of the voltage and current, and add (n/

250)% of reading to the nth component of the power.

•Accuracy when the crest factor is 6: The same as when the range is doubled for crest factor 3.

• The accuracy guaranteed range by frequency and voltage/current is the same as the guaranteed range of normal measurement.

Voltage and Current

±(reading error +

measurement range error)

0.7% of reading + 0.3% of range

0.7% of reading + 0.05% of range

Voltage and Current

±(reading error + measurement

range error)

0.25% of reading + 0.3% of range

0.3% of reading + 0.05% of range

0.6% of reading + 0.05% of range 1% of reading + 0.05% of range

2.5% of reading + 0.05% of range 8% of reading + 0.05% of range

Voltage and Current

±(reading error + measurement

range error)

0.25% of reading + 0.3% of range

0.3% of reading + 0.05% of range

0.7% of reading + 0.05% of range

3.0% of reading + 0.05% of range

Voltage and Current

±(reading error + measurement

range error)

0.15% of reading + 0.3% of range

0.1% of reading + 0.05% of range

0.3% of reading + 0.05% of range 1% of reading + 0.2% of range

±(reading error + measurement

1.4% of reading + 0.4% of range

1.4% of reading + 0.1% of range

±(reading error + measurement

0.5% of reading + 0.4% of range

0.45% of reading + 0.1% of range

1.2% of reading + 0.1% of range 2% of reading + 0.1% of range 5% of reading + 0.15% of range 16% of reading + 0.15% of range

±(reading error + measurement

0.45% of reading + 0.4% of range

0.45% of reading + 0.1% of range

1.4% of reading + 0.1% of range

1.4% of reading + 0.15% of range 6% of reading + 0.15% of range

0.25% of reading + 0.4% of range

0.2% of reading + 0.1% of range

0.6% of reading + 0.15% of range 2% of reading + 0.4% of range

Power

range error)

Power

range error)

Power

range error)

Power

±(reading error + measurement

range error)

Frequency • PLL synchronization method: 2.5 Hz  f  100 kHz Measurement range • External sampling clock method: 0.15 Hz  f  5 kHz Display update Depends on the PLL source

PPL Timeout value Depends on the PLL source

• PLL synchronization method: 1 s or more

• External sampling clock method: 20 s or more

• PLL synchronization method: 5 s or more

• External sampling clock method: 40 s or more

• IEC Harmonic Measurement

Item Specifications Measured source Select an input element or an Σ wiring unit Format PLL synchronization method Frequency range Fundamental frequency of the PLL source is in the range of 45 Hz

PLL source • Select the voltage or current of each input element (external

FFT data length 9000 FFT processing word 32 bits length Window function Rectangular Anti-aliasing filter Set using a line filter (5.5 kHz). Interharmonic Select OFF, Type1, or Type2. measurement

Sample rate (sampling frequency), window width, and upper limit of measured order

Fundamental

Frequency of the

PLL Source

(Hz) 45 to 55 55 to 66

Accuracy

• When the line filter (5.5 kHz) is ON Frequency

45 Hz  f  66 Hz 66 Hz  f  440 Hz 440 Hz  f  1 kHz 1 kHz  f  2.5 kHz

2.5 kHz  f  3.3 kHz

However, all the items below apply.

• When the crest factor is set to 3

• When λ (power factor) = 1

•Power figures that exceed 440 Hz are reference values.

•For external current sensor range, add 0.03 mV to the current accuracy and add (0.03 mV/

external current sensor range rating)×100% of range to the power accuracy.

•For 30A direct current input range, add (0.1 mA/direct current input range rating)× 100% of

range to the power accuracy.

•For 2A direct current input range, add (1 µA/direct current input range rating) × 100% of

range to the power accuracy.

•For nth order component input, add {n/(m+1)}/50% of (the nth order reading) to the n+m

order and n-mth order of the voltage and current, and add {n/(m+1)}/25% of (the nth order reading) to the n+mth order and n-mth order of the power (only when applying a single frequency).

•Accuracy when the crest factor is 6: The same as when the range is doubled for crest

factor 3.

• The accuracy guaranteed range by frequency and voltage/current is the same as the

guaranteed range of normal measurement.

Frequency 45 Hz  f  1 MHz Measurement range Display update Depends on the PLL source

• Waveform Computation Function

Item Specifications Computed source Voltage, current, and active power of each input element; torque

Equation Two equations (MATH1 and MATH2) Operator +, –, *, /, ABS (absolute value), SQR (square), SQRT (square root),

Sampling clock Fixed to 200 kHz Display update Data update interval + computing time

to 66 Hz.

current sensor range is greater than or equal to 500 mV) or the external clock (fundamental frequency).

•Input level Greater than or equal to 50% of the measurement range rating when the crest factor is 3 Greater than or equal to 100% of the measurement range rating when the crest factor is 6

• Be sure to turn the frequency filter ON.

Sample Rate

(S/s)

f × 900 f × 750

±(reading error + measurement

0.2% of reading + 0.04% of range

0.5% of reading + 0.05% of range 1% of reading + 0.05% of range

2.5% of reading + 0.05% of range 8% of reading + 0.05% of range

(Approximately 200 ms when the frequency of the PLL source is 45 Hz to 66 Hz.)

(analog input) and speed (analog input) of motor input; and motor output

LOG (natural logarithm), LOG10 (common logarithm), EXP (exponent), NEG (negation), AVG2, AVG4, AVG8, AVG16, AVG32, AVG64 (exponential average).

Window Width against

the FFT Data Length

(Frequency of the

Fundamental Wave)

10 12

Voltage and Current

range error)

Upper Limit of the

Measured Order

50 50

Power

±(reading error + measurement

range error)

0.4% of reading + 0.05% of range

1.2% of reading + 0.1% of range 2% of reading + 0.1% of range 5% of reading + 0.15% of range 16% of reading + 0.15% of range

• FFT Function Specifications

Item Specifications Computed source Voltage, current, active power, and reactive power of each input

Number of computationsTwo computations (FFT1 and FFT2) Maximum frequency of 100 kHz analysis Number of points 20,000 points or 200,000 points Measurement period for 100 ms or 1 s the computation Frequency resolution 10 Hz or 1 Hz Window function Rectangular, Hanning, or Flattop Anti-aliasing filter Set using a line filter (OFF, 500 Hz, 5.5 kHz, or 50 kHz). Sampling clock Fixed to 200 kHz Display update Data update rate or (measurement period of the FFT + FFT

* The measurement period is 1 s when the number of FFT points is 200 k (when the frequency

resolution is 1 Hz). The measurement period is 100 ms when the number of FFT points is 20 k (when the frequency resolution is 10 Hz).

element. Active power and reactive power of an Σ wiring unit. Torque and speed signals (analog input) of motor input (option). Type PS (power spectrum)

computing time), whichever is longer

• Harmonic Measurement in Normal Measurement

Item Specifications Measured source All installed elements Format PLL synchronization method Frequency range Range in which the fundamental frequency of the PLL source is 10

PLL source • Select the voltage or current of each input element (external

FFT data length 9000 FFT processing word 32 bits length Window function Rectangular Anti-aliasing filter Set using a line filter (5.5 kHz or 50 kHz).

Note) To measure and display harmonic data requires a data update rate of 500 ms or

Sample rate (sampling frequency), window width, and upper limit of measured order during PLL synchronization

On models with the advanced computation (/G6) option

Fundamental

the PLL Source

(Hz)

10 to 20 20 to 40 40 to 55 55 to 75 75 to 150 150 to 440 440 to 1100 1100 to 2600

Hz to 2600 Hz

current sensor range is greater than or equal to 500 mV) or the external clock (Ext Clk).

•Input level Greater than or equal to 50% of the measurement range rating when the crest factor is 3 Greater than or equal to 100% of the measurement range rating when the crest factor is 6

•Turn the frequency filter ON when the fundamental frequency is less than or equal to 440 Hz.

Sample Rate

(S/s)

f × 3000 f × 1500 f × 900 f × 750 f × 450 f × 360 f × 150 f × 60

Window Width against

the FFT Data Length

(Frequency of the

Fundamental Wave)

3 6 10 12 20 25 60 150

Upper Limit of the

Measured Order

100 100 100 100 50 15 7 3

• When the line filter (50 kHz) is ON Frequency

10 Hz  f  30 Hz 30 Hz  f  440 Hz 440 Hz  f  2.5 kHz

2.5 kHz  f  5 kHz 5 kHz  f  7.8 kHz

If the fundamental frequency is between 1 kHz and 2.6 kHz, add 0.5% of reading to the voltage and current accuracy and 1% of reading to the power accuracy when the frequency exceeds 1 kHz.

• When the line filter is OFF Frequency

10 Hz  f  30 Hz 30 Hz  f  440 Hz 440 Hz  f  2.5 kHz

2.5 kHz  f  5 kHz 5 kHz  f  7.8 kHz

If the fundamental frequency is between 1 kHz and 2.6 kHz, add 0.5% of reading to the voltage and current accuracy and 1% of reading to the power accuracy when the frequency exceeds 1 kHz.

However, all the items below apply to all tables.

•When averaging is ON, the averaging type is EXP, and the attenuation constant is greater than or equal to 8.

• When the crest factor is set to 3

• When λ (power factor) = 1

•Power exceeding 440 Hz are reference value.

•For external current sensor range, add 0.2 mV to the current accuracy and add (0.2 mV/ external current sensor range rating)×100% of range to the power accuracy.

•For 30A direct current input range, add 0.2 mA to the current accuracy and add (0.2 mA/ direct current input range rating)×100% of range to the power accuracy.

•For 2A direct current input range, add 2 µA to the current accuracy and add (2 µA/direct current input range rating) × 100% of range to the power accuracy.

•For nth order component input, add {n/(m+1)}/50% of (the nth order reading) to the n+m order and n-mth order of the voltage and current, and add {n/(m+1)}/25% of (the nth order reading) to the n+mth order and n-mth order of the power.

• Add (n/500)% of reading to the nth component of the voltage and current, and add (n/

250)% of reading to the nth component of the power.

•Accuracy when the crest factor is 6: The same as when the range is doubled for crest factor 3.

• The accuracy guaranteed range by frequency and voltage/current is the same as the guaranteed range of normal measurement.

If the amplitude of the high frequency component is large, influence of approximately 1% may appear in certain orders. The influence depends on the size of the frequency component. Therefore, if the frequency component is small with respect to the range rating, this does not cause a problem.

Voltage and Current

±(reading error + measurement

range error)

0.25% of reading + 0.3% of range

0.2% of reading + 0.15% of range 1% of reading + 0.15% of range 2% of reading + 0.15% of range

3.5% of reading + 0.15% of range

Voltage and Current

±(reading error + measurement

range error)

0.15% of reading + 0.3% of range

0.1% of reading + 0.15% of range

0.6% of reading + 0.15% of range

1.6% of reading + 0.15% of range

2.5% of reading + 0.15% of range

0.45% of reading + 0.4% of range

0.4% of reading + 0.15% of range 2% of reading + 0.2% of range 4% of reading + 0.2% of range 6% of reading + 0.2% of range

0.25% of reading + 0.4% of range

0.2% of reading + 0.15% of range

1.2% of reading + 0.2% of range

3.2% of reading + 0.2% of range 5% of reading + 0.2% of range

Power

±(reading error + measurement

range error)

Power

±(reading error + measurement

range error)

• Waveform Sampling Data Saving Function

Parameters Voltage waveform, current waveform, analog input waveform of

Data type CSV format, WVF format Storage PCMCIA, USB memory (/C5 option)

torque and speed waveform calculation, FFT performing data

* Waveform calculation function (MATH) cannot be used with FFT

calculation at the same time.

Accuracy

• When the line filter (5.5 kHz) is ON Frequency

10 Hz  f  30 Hz 30 Hz  f  66 Hz 66 Hz  f  440 Hz 440 Hz  f  1 kHz 1 kHz  f  2.5 kHz

2.5 kHz  f  3.5 kHz

If the fundamental frequency is between 1 kHz and 2.6 kHz, add 0.5% of reading to the voltage and current accuracy and 1% of reading to the power accuracy when the frequency exceeds 1 kHz.

Voltage and Current

±(reading error + measurement

range error)

0.25% of reading + 0.3% of range

0.2% of reading + 0.15% of range

0.5% of reading + 0.15% of range

1.2% of reading + 0.15% of range

2.5% of reading + 0.15% of range 8% of reading + 0.15% of range

0.5% of reading + 0.4% of range

0.4% of reading + 0.15% of range

1.2% of reading + 0.15% of range 2% of reading + 0.15% of range 6% of reading + 0.2% of range 16% of reading + 0.3% of range

Power

±(reading error + measurement

range error)

Precision Power Analyzer WT3000

Voltage Fluctuation/Flicker Measurement (/FL optional)

• Normal Flicker Measurement Mode

Item Specifications Measurement Items dc Relative steady-state voltage change (Measurement Functions)

One observation period 30 min to 15 s Observation period count

dmax Maximum relative voltage change d(t) The time during which the relative voltage change during a

voltage fluctuation period exceeds the threshold level The maximum value within a observation period is displayed for the items above. Pst Short-term flicker value Plt Long-term flicker value

1 to 99

• Measurement of dmax Caused by Manual Switching Mode

Item Specifications Measurement dmax Maximum relative voltage change (Measurement Functions) One observation period 1 minute Observation period count Averaging Average of 22 measured dmax values excluding the maximum and

minimum values among 24 values

• Items Common to Measurement Modes

Item Specifications Target voltage/frequency Measured item All installed elements Measured source input Voltage (current measurement function not available) Flicker scale 0.01 to 6400P.U. (20%) divided logarithmically into 1024 levels. Display update 2 s (dc, dmax, and d(t))

Communication output dc. dmax, d(t), Pst, Plt, instantaneous flicker sensation (IFS), and

Printer output Screen image External storage output Screen image Accuracy dc, dmax: 4% (at dmax = 4%)

230 V/ 50 Hz or 120 V/60 Hz

For every completion of a observation period (Pst)

cumulative probability function (CPF)

Pst: ±5% (at Pst = 1) Conditions for the accuracy above

• Ambient temperature: 23 ± 1°C

• Line filter: OFF

• Input voltage range 220V to 250V at the 300V measuring range (50Hz) 110V to 130V at the 150V measuring range (60Hz)

Cycle-by-cycle measurement (/CC optional)

Synch source Select an external source of U1, I1, U2, I2, U3, I3,

Number of measurements 10-3000 Timeout time 0, 1-3600 seconds (set in units of seconds), 0(approximately

Synch source frequency range

Accuracy U, I, P: Add [(0.3+2*f) % of reading+ ((0.05+0.05*f)

U4, or I4. (the above parameters are measured continuously for each cycle of the one sync source signal)

24 hours) 1 Hz to 1000 Hz (for U and I)

0.1 Hz to 1000Hz (for external sync source)

% of range] to the accuracy for normal measurement. For external sensor input, Add (100+100*f) uV to the accuracy.

Freq Add [(0.3+2*f)% of reading to the accuracy

for normal measurement.

*f is kHz

GP-IB Interface

Use one of the following by NATIONAL INSTRUMENTS:

• AT-GPIB

• PCI-GPIB and PCI-GPIB+

• PCMCIA-GPIB and PCMCIA-GPIB+ Use driver NI-488.2M version 1.60 or later. Conforms electrically and mechanically to IEEE St’d 488-1978 (JIS C 1901-1987). Functional specification SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT1, and C0.

Encoding ISO (ASCII) Mode Addressable mode Address 0–30 Clear remote mode Remote mode can be cleared using the LOCAL key (except

Conforms to protocol IEEE St’d 488.2-1987.

during Local Lockout).

Ethernet Communications (/C7 Optional)

Number of communication ports Connector type RJ-45 connector Electrical and mechanical specifications Conforms to IEEE 802.3. Transmission system Ethernet 100BASE—TX/10BASE-T Transmission rate 10 Mbps/100Mbps Protocol TCP/IP Supported Services FTP server,FTP client (network drive),LPR client (network

Connector T ype RJ-45connector

printer), SMTP client (mail transmission), Web server, DHCP, DNS, Remote control

Serial (RS-232) Interface (/C2 Optional) * Select USBport (PC) or RS-232

Connector type 9-pin D-Sub (plug) Electrical specifications Conforms with EIA-574 (EIA-232 (RS-232) standard for 9-pin) Connection type Point-to-point Communication mode Full duplex Synchronization method Start-stop synchronization Baud rate Select from the following.

1200,2400,4800,9600,19200 bps

USB port(PC) (/C12 Optional) * Select USBport (PC) or RS-232

Connector Type B connector (receptacle) Electrical and Mechanical Specifications Conforms to USB Rev.1.1 Speed Max. 12 Mbps Number of Ports 1 Supported service Remote control Supported Systems Models with standard USB ports that run Windows 2000 or

Windows XP with USB port as a standard. (A separate device driver is required for connecting to a PC.)

USB port(Peripheral) (/C5 Optional)

Connector Type A connector (receptacle) Electrical and Mechanical Specifications Conforms to USB Rev.1.1 Speed Max. 12 Mbps Number of Ports 2 Supported keyboards 104 keyboard (US) and 109 keyboard (Japanese) conforming

Supported USB memory devices USB (USB memory) flash memory Power supply 5 V, 500 mA (per port)

to USB HID Class Ver.1.1devices

However, device whose maximum current consumption exceeds 100 mA cannot be connected simultaneously to the two ports.

External I/O

I/O Section for Master/Slave Synchronization Signals

Connector type BNC connector: Both slave and master

External Clock Input Section

Connector type BNC connector Input level TTL Inputting the synchronization source as the Ext Clk of normal measurement. Frequency range Same as the measurement range for frequency measurement. Input waveform 50% duty ratio square wave Inputting the PLL source as the Ext Clk of harmonic measurement. Frequency range 10 Hz to 2.5 kHz Input waveform 50% duty ratio square wave Inputting the external sampling clock (Smp Clk) of wide bandwidth harmonic measurement. Frequency range 3000 times the frequency of 0.1 Hz to 66 Hz Input waveform 50% duty ratio square wave

For Triggers

Minimum pulse width 1 µs Trigger delay time Within (1 µs + 1 sample rate)

PC Card Interface TYPE II (Flash ATA card)

General Specifications

Warm-up time Approximately thirty minutes. Operating temperature: 5–40°C Operating humidity: 20–80% (when printer not used), 35 to 80% RH (when printer

Operating altitude 2000 m or less Storage environment: -25–60°C (no condensation may be present) Storage humidity: 20 to 80% RH (no condensation) Rated supply voltage 100–240 VAC Allowed supply voltage fluctuation range 90–264 VAC Rated supply frequency 50/60 Hz Allowed supply frequency fluctuation 48 to 63 Hz Maximum power consumption Weight Approximately 15 kg (including main unit, 4 input elements,

Battery backup Setup information and internal clock are backed up with the

*Warning for Class A instruments This is a Class A instrument based on Emission standards EN61326-1 and EN55011, and is designed for an industrial environment. Operation of this equipment in a residential area may cause radio interference, in which case users will be responsible for any interference which they cause.

is used) (No condensation may be present)

150 VA (when using built-in printer)

and options)

lithium battery

DESCRIPTION

Automatically select the appropriate calculation for each data updating period

AC signals have waveforms that fluctuate repeatedly when viewed instantaneously. Therefore, measuring the power values of AC signals requires averaging for each period in a repeated interval, or averaging the data of several periods using a filtering process. The WT3000 automatically selects the appropriate calculation method (one of the above two methods) based on the data updating period. This approach ensures fast response and high stability as suitable for the particular measurement objective.

 When the data updating period is 50ms, 100ms, 5s, 10s, or 20s

Measurement values are determined by applying an Average for the Synchronous Source Period (ASSP) calculation to the sample data within the data updating period. (Note that this excludes power integrated values WP, as well as current integrated value q in DC mode). With ASSP, a frequency measurement circuit is used to detect the input signal period set as the synchronous source. Sample data corresponding to an interval which is an integer multiple of the input period are used to perform the calculation. Based on its fundamental principles, the ASSP method allows measurement values to be obtained simply by averaging an interval corresponding to a single period, so it is useful in cases where the

Selecting formulas for calculating apparent power and reactive power

There are several types of power––active power, reactive power, and apparent power. Generally, the following equations are satisfied: Active power P = UIcosØ (1) Reactive power Q = UIsinØ (2) Apparent power S = UI (3) In addition, these power values are related to each other as follows: (Apparent power S)

U: Voltage RMS I: Current RMS Ø: Phase between current and voltage

Three-phase power is the sum of the power values in the individual phases.

These defining equations are only valid for sinewaves. In recent years, there has been an increase in measurements of distorted waveforms, and users are measuring sinewave signals less frequently. Distorted waveform measurements provide different measurement values for apparent power and reactive power depending on which of the above defining equations is selected. In addition, because there is no defining equation for power in a distorted wave, it is not necessarily clear which equation is correct. Therefore, three different formulas for calculating apparent power and reactive power for three-phase four-wire connection are provided with the WT3000.

= (Active power P)2 + (Reactive power Q)2 (4)

 TYPE1 (method used in normal mode with older WT Series models)

With this method, the apparent power for each phase is calculated from equation (3), and reactive power for each phase is calculated from equation (4). Next, the results are added to calculate the power. Active power: Apparent power: Reactive power:

*S1, S2, and S3 are calculated with a positive sign for the leading phase and a negative sign for the lagging phase.

 TYPE2

The apparent power for each phase is calculated from equation (3), and the results are added together to calculate the three-phase apparent power (same as in TYPE1). Three-phase reactive power is calculated from three-phase apparent power and three-phase active power using equation (4). Active power: Apparent power: Reactive power:

 TYPE3 (method used in harmonic measurement mode with WT1600 and PZ4000)

This is the only method in which the reactive power for each phase is directly calculated using equation (2). Three-phase apparent power is calculated from equation (4). Active power: Apparent power: Reactive power:

data updating period is short or when measuring the efficiency of low-frequency signals. This method will not provide correct measurement values unless the period of the set synchronous source signal is accurately sensed. Therefore, it is necessary to check whether the frequency of the synchronous source signal has been accurately measured and displayed. See the user’s manual for notes on the synchronous source signal and frequency filter settings.

 When the data updating period is 250ms, 500ms, 1s, or 2s

Measurement values are determined by applying an Exponential Average for Measuring Period (EAMP) calculation to the sample data within the data updating period. With EAMP, the sample data are averaged by applying a digital filtering process. This method does not require accurate detection of the input period. EAMP provides excellent measurement value stability.

* See page 12 of the specifications for information on the relationship between the data updating

period and the lowest measurement frequency.

PΣ=P1+P2+P3 SΣ=S1+S2+S3(=U1×I1+U2×I2+U3× I3) QΣ=Q1+Q2+Q3

PΣ=P1+P2+P3 SΣ=S1+S2+S3(=U1×I1+U2×I2+U3×I3)

QΣ=SΣ2-PΣ

PΣ=P1+P2+P3

SΣ=PΣ2+QΣ

QΣ=Q1+Q2+Q3

(= (U1×I1)2-P12+ (U2×I2)2-P22+ (U3×I3)2-P3

Accessories

Instrument Carts.

* These mount do not conform to CE marking.

701960

Compact Instrument Cart

500 × 560 × 705 mm (WDH) /A: Keyboard and mouse mount

Top shelf

Equipment not exceeding 450 (W) × 450 (D) × 300 (H) mm

Middle shelf

Equipment not exceeding 450 (W) × 450 (D) × 300 (H) mm

Bottom shelf

Equipment not exceeding 450 (W) × 450 (D) × 240 (H) mm

* W: Width D: Depth H: Height Maximum load: 20 kg on each shelf

701962

All-purpose Instrument Cart

467 × 693 × 713 mm (WDH)

Top shelf

Equipment not exceeding 457 (W) × 683 (D) mm

Drawer

Equipment not exceeding 610 (W) × 380 (D) mm

Slide table

Equipment not exceeding 380 (W) × 440 (D) mm

* W: Width D: Depth Maximum load: 50 kg on each shelf

701961

Deluxe Instrument Cart

570 × 580 × 839 mm (WDH) /A: Keyboard and mouse mount

Top shelf

Equipment not exceeding 450 (W) × 450 (D) × 400 (H) mm

Bottom shelf

Equipment not exceeding 450 (W) x 450 (D) × 400 (H) mm

* W: Width D: Depth H: Height Maximum load: 50 kg on each shelf *The photo shows the mount holding a DL7400.

 External dimensions of Yokogawa power meters

WT3000/WT1800 WT1600 WT210/WT310 WT230/WT330 PZ4000

Width (mm) Height (mm) Depth (mm)

426 426 213 213 426

177 177

88 132 177

*1 The back-side inputs protrude beyond the back shelves of the mounts.

450 400 379 379 450

Compact mount

701960

✓

(excluding protrusions)

Deluxe mount

701961

✓

General-purpose

mount 701962

✓

Model and Suffix Codes

Precision Power Analyzer WT3000

Model

760301 WT3000 1 input element model 760302 760303 760304 Element number

Version

Power cord

Options

* requires 761922 software Note:Adding input modules after initial product delivery will require rework at the factory.

Please choose your models and configurations carefully, and inquire with your sales

representative if you have any questions.

Standard accessories

Power cord, Spare power fuse, Rubber feet, current input protective cover, User’s manual, expanded user’s manual, communication interface user’s manual, printer roll paper(provided only with /B5), connector (provided only with /DA) Safety terminal adapter 758931(provided two adapters in a set times input element number)

*Cable B9284LK (light blue) for external current sensor input is

sold separately. Safety terminal adapter 758931 is included with the WT3000. Other cables and adapters must be purchased by the user.

Suffix Codes Description

WT3000 2 input elements model WT3000 3 input elements model

-01

-02

-03

-04

-40

-SV

-MV

-D

/G6

/B5

/DT

/FQ

/DA

WT3000 4 input elements model

30A input element

2A input element

Standard Version Motor Version UL/CSA standard VDE standard-F AS standard-R BS standard-Q GB standard-H NBR standard-N Advanced Computation (IEC standard testing*, harmonic, FFT, Waveform computation) Built-in Printer Delta Calculation Add-on Frequency Measurement 20ch D/A output VGA Output

/V1

Serial (RS-232) Interface

/C2

Select

USB port (PC)

/C12

one

USB port (Peripheral)

/C5

Ethernet function

/C7

Cycle by Cycle

/CC

Voltage Fluctuation, Flicker

/FL

Safety terminal adapter 758931

for 760301 model for 760302 model for 760303 model for 760304 model for 760301 model-10 for 760302 model-20 for 760303 model-30 for 760304 model

Application Software

Model Product

760122 WTViewer Software Data acquisition software 1 761922

Harmonic/Voltage fluctuation/Flicker Measurement Software

Standard-compliant measurement 1

Description

Order Q’ty

Rack Mount

Model Product Description

751535-E4 Rack mounting kit For EIA 751535-J4 Rack mounting kit For JIS

Accessory (sold separately)

Model/parts number

758917 758922 758929 758923 758931

758921 701959 758924 366924 * 366925 * B9284LK B9316FX

Due to the nature of this product, it is possible to touch its metal parts. Therefore, there is a risk of electric shock, so the product must be used with caution.

* Use these products with low-voltage circuits (42V or less).

Test read set Small alligator-clip Large alligator-clip Safety terminal adapter Safety terminal adapter

Fork terminal adapter Safety mini-clip Conversion adapter BNC-BNC cable BNC-BNC cable External sensor cable Printer roll pager

Product

A set of 0.8m long, red and black test leads Rated at 300V and used in a pair 1 Rated at 1000V and used in a pair 1 (spring-hold type) Two adapters to a set. 1 (screw-fastened type) Two adapters to a set. 1.5 mm hex Wrench is attached Banana-fork adapter. Two adapters to a set Hook type. Two in a set BNC-banana-jack(female) adapter 1 1m 1 2m 1 Current sensor input connector. Length 0.5m Thermal paper, 10 meters (1 roll) 10

Description

Order Q’ty

1 1

Mounts

Model

701960 Compact mount 500*560*705mm(W, D, H)

701961 Deluxe mount 570*580*839mm(W, D, H)

701962

Suffix and codes

/A Key board and mouse table

Description Description

General-purpose mount 467*693*713mm(W, H, D)

Current Sensor Unit

Model

Suffix code

751521 751523

Supply voltage

Power cord

* 751523-10 is designed for WT3000 and WT1800. 751523-20 is designed for the WT200 Series. * 751521/751523 do not conform to CE Marking.

Description

Single-phase

-10 Three-phase U, V Three-phase U, W

-20 Three-phase U, V, W

-30 100 V AC (50/60 Hz)

-1 115 V AC(50/60 Hz)

-3 230 V AC(50/60 Hz)

-7 UL/CSA standard

-D VDE standard

-F AS standard

-R BS standard

-J GB standard

-H

DC to 100 kHz (-3 dB). -600 A to 0 A to +600 A (DC) Basic accuracy:(0.05% of rdg* + 40 mA) Superior noise withstanding ability and CMRR characteristic due to optimized casing design

AC/DC Current sensor /Clamp on Probe

Model Product Name Description

CT1000 AC/DC Current sensor DC~300 kHz, ±(0.05% of reading +30uA), 1000 Apk CT200 AC/DC Current sensor DC~500 kHz, ±(0.05% of reading +30uA), 200 Apk CT60 AC/DC Current sensor DC~800 kHz, ±(0.05% of reading +30uA), 60 Apk 751552 Clamp-on probe 30 Hz~5 kHz, 1400 Apeak(1000 Arms)

* CT series do not conform CE Marking. * For detailed information, see Power Meter Accessory Catalog Bulletin CT1000-00E

Exterior

YOKOGAWA METERS & INSTRUMENTS CORPORATION

Global Sales Dept.

E-mail: tm@cs.jp.yokogawa.com

YOKOGAWA CORPORATION OF AMERICA Phone: (1)-770-253-7000, Fax: (1)-770-254-0928 YOKOGAWA EUROPE B.V. Phone: (31)-88-4641000, Fax: (31)-88-4641111 YOKOGAWA ENGINEERING ASIA PTE. LTD. Phone: (65)-62419933, Fax: (65)-62412606

Phone: +81-42-534-1413 Facsimile: +81-42-534-1426

426 13

unit : mm

20 177

Subject to change without notice.

427

Printed in Japan, 309(KP)

Atec WT3000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual