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Power Quality Analyzer

Author:Sifang Sanyi    Date:2013-12-24 18:52

Portable Power Quality Analyzer

Main Features

SF DZ-4 Ⅲ Power Quality Analyzer

1、Adopt IEC/61000-4-7, IEC61000-4-30 to measure harmonic and inter-harmonics. Minimum resolution of frequency is 5Hz. 

Sampling period is 10 cycle. It can carry out 0.5 times (25HZ)inter-harmonics group and 0.1 times (5HZ)inter-harmonic 

calculation. 

2、High-speed fault analysis and recording strictly according to transient data exchange mode.

3、5- inch LED full color screen, graphical data display.

4、Provide full support to PQDIF data files.

SF DZ-4II Power Quality Analyzer     

1、5-inch full color LCD display, human 

operation interface.

2、Support keyboard and mouse operation. Support U disk data export.

3、Class Windows human-machine interface, which is humanistic and friendly.

4、Data analysis and report generation                             

5、More compact structure, more powerful function, more convenient display.

SF DZ-4I Power Quality Analyzer         

Combine notebook computer with sampling system of high speed and accuracy to ensure accuracy of sampling signals.

1、Construct powerful power quality analysis system using plentiful software. The system consists of hardware sampling system and analysis software.

2、Adopt a serial port between sampling system and notebook. 

Instrument function

1、Signal channel: measure 1×3 phase voltage signal and 1×3 current signal.

2、Measuring content: (power quality indexes made by national standard) 1-50 harmonic voltage, current distortion, valid value, phase angle, active power, inactive power, power factor, sequence component, voltage flicker, voltage fluctuate, signal waveform, spectrum, voltage deviation and frequency. 

3、Measuring mode: There are 2 kinds of measuring modes. The first kind is sampling one cycle from signal each time and then do analysis. This method applies to measuring rapid changeable signal source. The second is to carry out 6 times equal interval sampling in 3 seconds. Analyze the measurement result of this 6 times sampling using FFS and then carry out RMS processing to distinguish transient phenomenon and harmonic.

Background Software Function

1、Power Quality Real-time Display: Real-time monitor、record at regular time、print out various power quality indexes.

2、Data Analysis: draw variation curve、harmonic distribution graph、statistical analysis、qualification rate calculation.

3、Power Quality Report Form: generate power quality report form at any time.

Measuring Connection

1、The front panel has voltage measurement socket “U”If measure phase voltage(Y-connection), please use plug marked “Y”If measure line voltage(△-connection), please use plug marked “△” 

2、When measuring current signal, please plug clamp meter into the socket of the front  

Panel, and then carry out measuring.

Technical Indexes

Voltage measuring range

AC voltage 10 - 400V

Current measuring range


AC current 0.05 - 6A

Frequency measuring range

47.552.5Hz

Harmonic analysis range

00 – 50 times harmonic,   “00”indicates voltage total distortion and total harmonic current  valid value


Harmonic voltage ratio

Uh≥1%UN     σ≤±5%Uh

Uh1%UN     σ≤±0.05%UN


Harmonic current ratio

Ih≥±3%IN      σ≤±5%Ih

Ih±3%IN     σ≤±0.15%IN

 Accuracy of basic indexes

Voltage derivation error≤±0.5%;voltage fluctuation error≤±5%;flicker error≤±5voltage dissymmetry factor absolute error< 0.2%current dissymmetry factor absolute error< 1%frequency measurement error< 0.01Hz

Voltage side input DC resistance

> 100KΩ

Current side input DC resistance

< 0.1Ω

Working power supply

Voltage: AC220V±20%   Frequency: 4555Hz

Voltage measuring range

AC voltage 10 - 400V

Current measuring range

AC current 0.05 - 6A

Frequency measuring range

47.5~52.5Hz

Harmonic analysis range

00 – 50 times harmonic,   “00”indicates voltage total distortion and total harmonic current  valid value

Harmonic voltage ratio

Uh≥1%UN     σ≤±5%Uh

Uh<1%UN     σ≤±0.05%UN

Harmonic current ratio

Ih≥±3%IN      σ≤±5%Ih

Ih<±3%IN     σ≤±0.15%IN

 Accuracy of basic indexes

Voltage derivation error≤±0.5%;voltage fluctuation error≤±5%;flicker error≤±5voltage dissymmetry factor absolute error< 0.2%current dissymmetry factor absolute error< 1%frequency measurement error< 0.01Hz

Voltage side input DC resistance

> 100KΩ

Current side input DC resistance

< 0.1Ω

Working power supply

Voltage:AC220V±20%       Frequency:45-55Hz


Standard No.


Standard name


Note

GB/T 15945—2008

Power quality  power system frequency deviation


GB/T 12325—2008

Power quality  supply voltage deviation


GB/T 15543—2008

Power quality  3-phase voltage unbalance factor


GB/T 12326—2008

Power quality  voltage fluctuation and flicker


GB/T 14549—1993

Power quality  utility grid harmonic


GB/T 19862—2005

Power quality monitoring equipment general requirement



Executive Standard


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