HARMONIC ANALYSIS SOFTWARE FOR WT3000/WT2000/WT1600 (761922)

The measurement procedures and settings for harmonic/flicker standards testing have been precisely defined. Engineers must also stay current with the specialized knowledge and up-to-date information required to periodically review the contents of the standards and perform the standards conformance tests. The model 761922 Harmonic/Flicker Measurement Software enables engineers without specialized knowledge to perform a range of operations using the WT3000 Precision Power Analyzer including judging standards compliance and outputting test reports.


 
 
The measurement procedures and settings for harmonic/flicker standards testing have been precisely defined. Engineers must also stay current with the specialized knowledge and up-to-date information required to periodically review the contents of the standards and perform the standards conformance tests. The model 761922 Harmonic/Flicker Measurement Software enables engineers without specialized knowledge to perform a range of operations using the WT3000 Precision Power Analyzer including judging standards compliance and outputting test reports.

Note:
2-A input element is NOT supported.
Need /G6 option with WT3000 for harmonic standard testing.
Need /FL option with WT3000 for flicker standard testing.
Need /FQ and /FL options with WT3000 for 3-phase flicker standard testing.

Supported Standards 

· Harmonics
EN61000-3-2 / IEC61000-3-2 Update !
Limits for harmonic current emissions of the latest Edition
(Equipment i rated current of 16 A per phase or less)
EN61000-3-12 / IEC61000-3-12
Limits for harmonic current emissions
(Equipment rated current is of 75 A per phase or less, and more than 16 A per phase)
JIS C 61000-3-2
Limits for harmonic current emissions
(Equipment rated current of 20 A per phaseor less)

· Voltage fluctuation/flicker
EN61000-3-3 / IEC61000-3-3
Limitation of voltage fluctuations and flicker
(Equipment rated current of 16 A per phase or less, and not subject to conditional)
EN61000-3-11 / IEC61000-3-11
Limitation of voltage fluctuations and flicker supply systems
(Equipment rated current of 75 A or less, and subject to conditional)

Harmonic/Flicker Measurement Software
pic - Harmonic/Flicker Measurement Software

  • WT3000*: IEC61000-4-7 1991(window widths of 16 cycles), IEC61000-4-7 2002(Harmonic and interharmonic measurement supporting window widths of 50 Hz/60 Hz, 10/12 cycles).
  • WT2010/WT2030:
    Harmonics only, IEC61000-4-7 1991, not support interhamonic measurement.
  • WT1600:
    Harmonics only, not conformity to IEC standard

  • Use of WT3000/WT2000 enables measurements conforming to standard. 
  • Saves waveform/harmonic data in CSV format. 
  • System Construction for IEC testing.

Software Enabling Measurement Complying with Harmonics Standard


Harmonic Current Measurement Value List
Displays harmonic measurement data as a single list.		 761922 2

Viewing Trends
You can capture various types of data measured into your PC at 200ms fixed intervals. Thus, you can view trends graphically. This feature lets you monitor power supply voltage fluctuations, changes in current consumption and other time-based variations.

 761922 3

Harmonic Current Bar Graph
Evaluates whether harmonic data is within the standard limit value, and displays the result as a bar graph. The display of evaluation results is color-coded, in colors such as red and blue.2
 761922 4

Measurement Value Judgement Graph
Measures the harmonic current over the set observation time, and evaluates it in conformance with the standard. Evaluation results are displayed as PASS or FAIL.2
 761922 5

Waveform Observation
Lets you display voltage or current signal waveforms, and measure frequencies and peak values. Moving the cursor lets you display values for the displayed waveform.
 761922 6
2:Evaluations conforming to the IEC61000-3-2 Ed. 3.0 (2005) Amendment 1 (2008) are only supported by WT3000

Automatic Report Generation

You can print harmonic measurement results as value lists and graphs, and save image data. Titles and comments can be entered in reports, letting you enter information such as measurement dates/times, device names or control numbers.


 


 

 

Jas1 Tm 761922 07

Entering Settings on the WT3000/WT2000/WT1600 from Your PC

You can enter settings on the WT3000/WT2000/WT1600 from your PC. The wiring method, filters, and scaling settings can be modified. Jas2 Tm 761922 08 Jas2 Tm 761922 09

Converting Data to CSV Format

Waveform data and harmonic current values can be saved on the PC. Measured data can be saved to .csv files for easy access by spreadsheet programs such as EXCEL. Jas2 Tm 761922 10

Voltage Fluctuation and Flicker Measurement

Voltage fluctuation and flicker measurement complying with IEC 61000-3-3 is executed. Calculates all the voltage fluctuation and flicker values of dc, dmax, d(t), Pst, and Plt, compares them to the preset limits, and indicates the total judgment.   


Measured Value and Judgment for Each Observation Period

Normal Voltage Fluctuation and Flicker Measurement

  • The final values of dc, dmax, and d(t) are compared with the respective limits, and the judgment (pass or fail) is displayed to the right of the final value. If a steady-state condition does not occur during the measurement period, it is considered to be a fluctuating condition. The measurement result of dc is displayed as Undef (undefined), and the judgment of dc is displayed as Error.
  • The short-term flicker value, Pst, is calculated, compared to the limit, and the judgment (pass or fail) is displayed.
 Jas3 Tm 961922 14



Displaying the Trend Graph
You can show Trend Graph View. You can select from the following measurement functions.		 Jas3 Tm 961922 15
dc: Relative steady-state voltage change
dmax: Maximum relative voltage change
d(t): Period during which relative voltage change exceeds the threshold level
idc: Instantaneous relative steady-state voltage change
idmax: Instantaneous maximum relative voltage change
id(t): Period during which instantaneous relative voltage change exceeds the threshold level
PF: Instantaneous flicker sensation (IFS)

Displaying the CPF Graph
You can select the element and color to be displayed on the CPF graph.
Up to four elements can be displayed simultaneously.
You can set a separate color for each element.		 Jas3 Tm 961922 16


Printing
You can create reports using the data measured with the software.		 Jas3 Tm 961922 17

System Construction

Wiring

Jas4 Tm 761922 18
Jas4 Tm 761922 19

Main Software Functions

Three Measurement Modes (during online operation)

1. Harmonic Measurement Mode
Can evaluate measurement data while harmonics are being measured by a WT3000/WT2000/WT1600.

    NOTE: Saved measurement data can also be read and displayed during offline operation.

2. Harmonics Observation Mode
     Lets you observe harmonic variations as bar graphs or lists of numerical values, while harmonics are being measured by a WT Series digital power meter. Use this mode to observe changes in harmonic data.

3.   Waveform Observation Mode Lets you observe measured waveforms. Use this mode to observe waveform states.

Evaluations by Class

Can evaluate * data by class (A, B, C or D). Can evaluate whether the current value is within the maximum permitted harmonic current limit value (or within the power ratio limit value).

Harmonic Current Continuous Measurement

Lets you measure the harmonic current over a set amount of time. Can evaluate whether the result is within the limit value.*

Repeatability of Measurement Data

Maximum values and average values in harmonic measurement data can be compared and measurement data differences can be displayed as bar graphs and numerical values for each harmonic order saved. This mode lets you evaluate* whether values are within the 5% range specified by the standard (repeatability).
*Evaluations conforming to the IEC61000-3-2 Ed.2.2 standard are only supported by WT2000. Evaluations conforming to the IEC61000-3-2 Ed. 3.0(2005), Amendment 1 (2008) are only supported by WT3000. Evaluations are also possible using WT1600, but there are some restrictions.

Support for Tests Complying with IEC61000-3-2 Ed2.2

Harmonic measurement system configurationTm 761922 13

*3: Many AC Power Sources are available to provide the low-distortion AC Voltage and frequency to power the device under test. In addition, for fullcompliance testing, the power source must be capable of supplying the full 16 A load current specified by the IEC standard. Contact your local Yokogawa representative for recommendations.*4: The model that full supports the standard is the WT3000 and WT2000. The WT1600 digital power meter also enables harmonic measurement with display of each harmonic order component and distortion rate, but there are some restrictions.

Compliance with Standard of WT3000 Digital Power Meter

ln the EN61000-3-2:2000 (IEC61000-3-2 edition 2.2:2004), requirements for measuring devices are set forth by EN61000-4-7 2000(IEC61000-4-7). The table below shows the items the WT3000 digital power Analyzer complies with, among the EN61000-3-2 2000(IEC61000-3-2 edition 2.2:2004) related items in IEC61000-4-7 2002 (IEC61000-4-7 edition 2:2002)

Item IEC61000-4-7:2002
Standard
IEC61000-4-7 edition
2:2002		 Pricision Power Analyzer
WT3000		 Compliance with
Standard
Current measurement
error		 5% of maximum
allowance value or
0.15% of rated current,
whichever is larger.		 Accuracy for 40th-order
frequency of 2.4 kHz
with 60 Hz fundamental
frequency (direct inpuit):
crest factor 3 (2.5% of reading+0.05% of range)
within 5% error (when
2% or larger of input />range)crest factor 6 (2.5% of reading+0.1% of range)
within 5% error (when 4% or larger of input
 range)		  Yes
Measuring instrument
loss in current input circuit		 Voltage drop: 0.15V
max.
 Measuring instrument
loss: 5.5Ω approx.
+ 0.03 µH approx.
 Complies through
27 Arms approx.
Crest factor in current
input circuit		 5Arms or less: 4 10Arms or less: 3.5
10Arms or over: 2.5
Overload display required		 3 or 6
Has overload display		 Yes
 Range Composition of
current input circuit;
excenssive input
resistance  		 Direct input ranges: 0.1,
0.2, 0.5, 1, 2, 5, 10, 20,
50, 100A are appropriate ranges.		  0.5, 1, 2, 5, 10, 20, 30
A ranges (for crest factor 3)
0.25, 0.5, 1, 2, 5, 10, 15A
range (for crest factor 6)		 Complies within ranges on left.
Precise measurements require attention to the range selection and the crest 
Range for external shunt: 0.1 to 1 V is appropriate.  0.5, 1, 2, 5, 10, 20, 30
A ranges (for crest factor
 3) 0.25, 0.5, 1, 2, 5, 10,
15A range (for crest
 factor 6)
Maximum input is 1.2 times the range (cintinuous), or 10 times the range (1 second).  Direct input:
peak current of 90 A
or RMS of 33 A, whichever
is lower (continuous).
peak current of 150 A or
RMS of 50 A, whichever
is lower (1 second).
 External sensor input:
 Peak value not to
 exceed 5 times the
range (continous)
 Peak value not to
 exceed 10 times the range (1 second)
Anti-aliasing
 -50 dB min.
 -50 dB min. for fundamental frequency of 50 / 60 Hz up to 40th-order harmonic
  Yes
Window function shape
 Rectangular
 Rectangular
  Yes
Window function width
 10 cycle (50Hz)/12 cycle (60Hz)
 10 cycle (50Hz)/12 cycle (60Hz)
 Yes
Relative deviation of
 sampling frequency and
 fundamental frequency
 Within ±0.03%
 Within ±0.03%
 Yes
Smoothing
 Time constant: 1.5 seconds
 Time constant: 1.5 seconds
 Yes
Window gap and overlap
 No gap, no overlap

 No gap, no overlap
 Yes
General specifications
 Effects of temperature,
humidity, power voltage,
common mode voltage,
static electricity, and
radiation field are
specified.
 See general
specifications items.
 Complies for general specifications.

Compliance with Standard of WT2000 Digital Power Meter

ln the IEC61000-3-2 Ed. 2.2 standard, requirements for measuring devices are set forth by IEC61000-4-7. The table below shows the items the WT2000 digital power meter complies with, among the IEC61000-3-2 related items in IEC61000-4-7 (1991 version)

Item IEC61000-4-7 standard:
1991		  WT2000 digital power
meter + 761922
harmonic measurement
 software		  Compliance with
standard
Current Measurement
error
 lm ≥ 3% ln: 5% lm
lm < 3% ln: 0.15% ln
lm: Measurement value;
in: Measuring instrument
range		 Accuracy for 40th-order
frequency of 2.4 kHz
with 60 Hz fundamental
frequency:
2% of reading + 0.05%
of range, and
within 3.67% of lm
(when lm ≥ 3% of ln) or
within 0.11% of ln
(when lm < 3% of ln)		  Yes
Measuring instrument
loss in current input
circuit
 Voltage drop: 0.15 V
max.		 Measuring instrument loss: 6 m? approx.
+ 0.07 µH approx.		 Complies through 24 Apk approx.
Range Composition of
current input circuit;
excenssive input
resistance
  Direct input ranges: 0.1, 0.2, 0.5, 1, 2, 5, 16 A (10 A added if needed) are appropriate ranges.  1, 2, 5, 10, 20, 30 A ranges  Complies within ranges on left.
Precise measurements require attention to the range selection.  
 Range for external shunt: 0.1 to 1 V is appropriate.  50 mV / 100 mV / 200 mV ranges
 Maximum input is 1.2 times the range (cintinuous), or 10 times the range (1 second). Maxlmum input: 35 A (continuous), 50 A (1 second)
 Anti-aliasing  -50 dB min.    Yes
Window function shape
 Rectangular Hanning  Rectangular  Yes
Window function width
 Fluctuating harmonics:
16 waves (Rectangular)
20 to 25 waves (Hanning)		  16 waves  Yes
Relative deviation of
sampling frequency and
fundamental frequency
 Within ±0.03% for rectangular  Error of within ±0.03% relative to fundamental frequency. using rectangular window and PLL ciucuit  Yes
Smoothing
 Time constant: 1.5 seconds  Uses constant specified in IEC61000-4-7;
2002, corresponding to tlme constant of 1.5 seconds.		  Yes
Window gap and overlap
Rectangular: No gap, no overlap
Hanning: No gap, 50% overlap		  No gap, no overlap  Yes
General Specifications
 Effects of temperature,
humidity, power voltage,
common mode voltage,
static electricity, and
radiation field are
specified.		  See general specifications items. Complies for general specifications

Standard Support when using WT1600 Digital Power Meter

When the software (model 761922) is used with the WT1600 digital power meter, measurement based on the analysis method specified by the IEC61000-3-2 Ed. 2.2 standard is possible. However, measurement in complete compliance with the standard is not possible due to some restrictions on measurement precision. Therefore the WT1600 can be used for pre-compliance testing. For example, the standard item below is not satisfied.

 Requirement for current measurement error: 5% of lm (when lm (3% of ln) or 0.15% of ln (when lm < 3% of ln) (lm: measurement value; ln: measuring instrument range)

The accurancy of a harmonic measurement of 2.4 kHz using the WT1600 digital power meter (with 5.5 kHz filter) is [2% of reading + 0.1% of range]. The measurement error is within 5% of the reading when the measurement value is 3.34% of the range or more, so doesn't meet the 3% requirement.
In general, for harmonic current measurement, the higher the harmonic order of the current component, the smaller the error in proportioin to the range. To measure harmonic currents precisely the high-order components (such as for a 40th-order harmonic of 2.4 kHz for a fundamental frequency of 60 Hz) must be small. To male measurements in compliance with the standard, use the WT2000 digital power meter, which has a smaller range error.
Name Description File Type  
Bulletin 7619-22E Harmonic/Flicker Measurement Software pdf icon
761 KB		 Download
Name Description  
761922 Harmonic Analysis Software for WT3000/WT2000/WT1600 (trial version) The measurement procedures and settings for harmonic/flicker standards testing have been precisely defined. y-Link
761922 Harmonic Analysis Software for WT3000/WT2000/WT1600 (Upgrade Version) The measurement procedures and settings for harmonic/flicker standards testing have been precisely defined. y-Link
 
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