MEWOI6000-Power Quality Analyzer

  • Name:
    MEWOI6000-Power Quality Analyzer
  • Model No.:
    MEWOI6000
  • Main Features:
Electricity Testing Instruments manufacturer, Support OEM/ODM, your testing specialist
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 Ⅰ.Introduction

Click to download:  MEWOI6000 Color Page

Click to download:  Selection Map

 MEWOI6000 power quality analyzer is a product carefully developed by our company and specially designed for field test of three phases, multi-functional and intelligent, man-machine operation and concise and comprehensive test instrument. It is easy to use, large LCD screen display, high resolution, interface in both Chinese and English, shock-proof shell structure and so on. Can simultaneously measure the 4-channel current (ABC three phase and neutral wire current), 4-channel voltage (ABC three-phase voltage and neutral line voltage to ground), the peak value of current voltage, maximum/minimum value over a period, three-phase imbalance factor, short-time voltage flicker, transformer K factor, active power, reactive power, apparent power, power factor and displacement power factor, active power, reactive power, apparent power, total harmonic distortion and harmonic, etc; Display real-time waveform, harmonic ratio bar charts of current voltage; Dynamically capture instantaneous change of voltage current, monitoring starting current, monitoring the power parameters and generate the alarm list, generate the trend chart for a long time record test data.

MEWOI6000 power quality analyzer adopt DSP + ARM double processor architecture, DSP is use for data collection and the processing of algorithm, the ARM is use for the communication protocol and the man-machine interface processing; Analog signal acquisition is by 2 pieces AD7655 of ADI company. Resolution for AD7655 is 16 bit and it is 4 channel synchronous sampling. The highest sampling rate can reach 1 MSPS, to ensure the accuracy of the channel and the information integrity, and wouldn’t miss any transient changes in the grid, can more accurate to detect the transient waveform rising and dropping drastically, and waveform instantaneous interrupt; DSP working frequency is over 200 MHZ, to be able to timely monitoring of the power grid and dynamically adjust the sampling frequency to realize synchronization of power frequency and sampling frequency; Using a 5.6 -inch LCD color screen display, a resolution of 640 dots x 480 dots, with different display color difference between the parameters of phase, waveform, vector diagram, harmonic ratio, the user can be more efficient and more intuitive understand the state of power grid parameters. Built-in flash memory can store 60 group of screenshots at the same time, 150 groups of capture transient voltage/current waveform figure, and 12800 groups of alarm list. Starting current detection model can continuously capture starting current waveform for 100 s. Built-in 2G memory card to store the trend curve record, store all the parameters (including 50 harmonics with 123 power parameters), collect data for once every five seconds, trend curve records can be stored for 300 days.


Ⅱ.Function Specification

Function

Function specification

 

 

 

 

 

 

 

Test Function

4 channel voltage and the 4 channel current waveform real-time display
True RMS of voltage and current
DC component of Voltage
Peak value of current and voltage
Minimum/maximum values over a period of time of Current and voltage
Phasor diagram display
Measurement of harmonic of each phase, up to 50 harmonics
Display harmonics ratio of current and voltage of each phase
The calculation of total harmonic distortion(THD)
Active/reactive/apparent power value and gross of each phase
Active/reactive/apparent electric energy value and gross of each phase
Calculation of transformer K factor
Calculation of COSΦ displacement power factor(DPF) and power factor(PF)
Calculation of flicker
Calculation of three phase unbalance

Function of capture and monitoring

Can monitoring instantaneous change of power grid voltage current parameters, including the voltage fluctuation and flicker, voltage surge, sag and short supply interruption, temporary overvoltage and harmonics. Instruments and can store 150 groups of transient waveform

Function of starting current monitoring

Can monitor the startup current when electrical equipment is starting, help to correctly design capacity. It can display the trend curve of effective value of starting current, the starting current envelope curve, current voltage waveform of the all eight channel. Monitoring for 100 s, can store each cycle of all waveform curve points within 100 s .

Function of storage

Can totally record 123 parameters such as the testing parameter of base testing function(Urms、Uthd、Ucf、Uunb、Hz、Vrms、Vthd、Vcf、Vunb、PST、Arms、Athd、Acf、Aunb、KF、W、VAR、VA、PF、Cos φ、Tan φ),50 harmonics of voltage, 50 harmonic of current. Generate trend curve, the interval time of recording is able to set, collect once for 5s and can stored 75days.

Alarm function

Users can set up 40 groups alarm monitoring project, each group can set different judgments parameters (including 50 harmonics a total of 123 different parameters), can be set different alarm threshold, how long it will take to produce the alarm when over the critical value is can be set, etc. Can store up to a maximum of 12800 set alarm record.

Screenshots function

In any test page screenshots can store the current screen, automatically records the time and test mode at the same time. Such as save the current voltage wave, harmonic bar charts and phasor diagram, etc. Screenshots can be saved up to 60 groups.

Communication function

Communicate with computer by USB interface, monitoring software can display waveform of power quality analysis, able to read those has been detected and captured like transient waveform, trend curve record, alarm list, test screenshots, etc.

 

Setting function

The user can set the time and date, set the display contrast ratio and brightness, set each corresponding color of each phase line in the instrument

The connection mode of instruments and the grid type can be set

Can select different current clamp and different voltage test strain ratio
Can be selected menu in Chinese or English menu

Chinese/English help menu

Each phase of the operation may at any time by pressing "help" key for related information

Technical Specification

1. General specification

Power supply

Rechargeable lithium-ion battery pack 9.6V, 4500mAH , backup charger

Battery indicator

Battery symbol       shows dump energy, When the voltage is too low, automatic shutdown after the 1 minute

Power consumption

Current consumption of normal test 490mA, continuous working for 8 hours
Close the LCD low-power monitoring mode170mA, battery continuous working for 20hours

Display mode

LCD color screen,640dots×480dots ,5.6 inches, display demo:116mm×88mm

Instrument dimensions

LxWxT:240mm×170mm×68 mm

Size of clamp

008B current clamp:7.5mm×13mm; 040B current clamp:35mm×40mm; 068B current clamp: 68mm×68mm

Number of channels

4U/4I

Line voltage

1.0V~2000V

Phase voltage

1.0V~1000V

Current

008B current clamp 10mA~10.0A; 040 current clamp 0.10A~100A; 068B current clamp 1.0A~1000A; Optional Current Clamp,input current 1mA ~ 500mA

Frequency

40Hz~70Hz

Parameters of electricity

W, VA, var, PF, DPF, cos φ, tan φ

power parameter

Wh, varh, Vah

Harmonic

0~50times

Total harmonic distortion0~50 times, each phase

Model

Waveform model, harmonic model, Power and power energy mode, Waveform capture mode, Trend chart pattern, alarm mode , Screen mode

Set number of Transient record

150sets

Recode

300 days(recode 20 sets parameter at the same time, recode one point in 5 seconds)

Min/Max records

Can be measured maximum minimum value over a period of time

Warning

40 different types of parameter selection,12800set warning record

Phasor diagram display

Automatically

Capacity of screenshots

60

Language of manual

Chinese and English

Communication

USB

Automatically shutdown

At alarm/trend chart records/transient capture mode (pending or ongoing), 5 minutes without keystrokes, monitoring instruments automatically into low power mode, press any key to activate.

In other test mode, 15 minutes without keystrokes, prompt automatic shutdown after 1 minute

Quality of the instrument

6Kg(with package)

length of test line

Current clamp cable:2M; Voltage Cable: 3M

Working temperature

-10℃~40℃; below 80%Rh

Working humidity

-10℃~60℃; below 80%Rh

Input impedance

Input impedance for the test voltage:1MΩ

Withstand voltage

Can withstand 3700V / 50Hz sinusoidal ac voltage for 1 minute between Instrument wiring and the shell

Insulation

Between instrument wiring and shell≥10MΩ

Structure

Double insulation, vibration-proof jacket with insulation

Safety rules

IEC 61010 1000V Cat III / 600V CAT IV,IEC61010-031,IEC61326,pollusion 2

Accessories

Host:1pcs; Case:1pcs; Current Clamp: 008B,040B,068B 4PCS(3*4=12PCS); Cable:5pcs(yellow, green, red, blue, black ); Alligator clip 5pcs; Pin 5pcs; Charger 1pcs; Soft ware 1pcs; 2Gmemory card(in host) 1pcs.

2. Accuracy of instruction (under the base condition)

Measurement specification

Range

Display resolution

The maximum error in the range of the reference

Frequency40Hz~70Hz0.01Hz

±(0.03)Hz

True RMS phase voltage1.0V~1000VMin resolution0.1V

±(0.5%+5dgt)

True RMS line voltage1.0V~2000VMin resolution0.1V±(0.5%+5dgt)
DC Voltage1.0V~1000VMin resolution0.1V

±(1.0%+5dgt)

True RMS current10.0mA~1000AMin resolution0.1mA

±(0.5%+5dgt)

Phase voltage peak1.0V~1414VMin resolution0.1V

±(1.0%+5dgt)

Line voltage peak1.0V~2828VMin resolution0.1V

±(1.0%+5dgt)

Current peak0.0mA~1414AMin resolution0.1mA

±(1.0%+5dgt)

Peak factor1.00~3.990.01

±(1%+2dgt)

4.00~9.990.01

±(5%+2dgt)

Active power0.000W~9999.9KWMin resolution 0.001W

±(1%+3dgt);Cosφ≥0.8

±(1.5%+10dgt);0.2≤Cosφ<0.8

Reactive power

Inductive & Capacitive

0.000VAR~9999.9KVARMin resolution 0.001VAR

±(1%+3dgt);Sinφ≥0.5

±(1.5%+10dgt);0.2≤Sinφ<0.5

Apparent power0.000VA~9999.9KVAMin resolution 0.001VA

±(1+3dgt %)

Power factor-1.000~1.0000.001

±(1.5%+3dgt);Cosφ≥0.5

±(1.5%+10dgt);0.2≤Cosφ<0.5

Active energy0.000Wh~9999.9MWhMin resolution 0.001Wh

±(1%+3dgt);Cosφ≥0.8

±(1.5%+10dgt);0.2≤Cosφ<0.8

Reactive energy

Inductive & Capacitive

0.000VARh~9999.9MVARhMin resolution 0.001VARh

±(1%+3dgt);Sinφ≥0.5

±(1.5%+10dgt);0.2≤Sinφ<0.5

Apparent power0.000VA~9999.9MVAhMin resolution 0.001VAh

±(1%+3dgt)

Phase angle-179°~180°

±(2°)

Tan φ(VA≥50VA)-32.76~32.76Min resolution 0.001

φ:±(1°)

The displacement power factor (DPF)-1.000~1.0000.001

±(1%+5dgt)

Harmonicratio(Vrms>50V)0.0 %~99.9 %0.1 %

±(1%+5dgt)

Harmonic Angle(Vrms>50V)-179°~180°

±(3°)harmonic1~25

±(10°)harmonic26~50

Rate of total harmonic

(DF or THD-F)≤50

0.0 %~99.9 %0.1 %

±(1%+5dgt)

Distortion factor

(DF or THD-R)≤50

0.0 %~99.9 %0.1 %

±(1%+10dgt)

Transformer K factor1.00~99.990.01

± (5 %)

Three-phase imbalance0.0%~100 %0.1 %± (1 %)

3. Feature of current clamp

Model

True RMS current

Max error True RMS current

Max error of Phase Angle Φ

MEWOI 108C

Ф8mm

10mA~99mA

±(1 % + 3dgt)

±(1.5°),Arms≥20mA

100mA~10.0A

±(1 % + 3dgt)

±(1°)

MEWOI 140C

Ф40mm

0.10A~0.99A

±(1 % + 3dgt)

±(1.5°)

1.00A~100A

±(1 % + 3dgt)

±(1°)

MEWOI 168C

Ф68mm

1.0A~9.9A

±(2 % + 3dgt)

±(3°)

10.0A~1000A

±(2 % + 3dgt)

±(2°)

Host:1pcs; Case:1pcs; Current Clamp: 008B,040B,068B 4PCS(3*4=12PCS); Cable:5pcs(yellow, green, red, blue, black ); Alligator clip 5pcs; Pin 5pcs; Charger 1pcs; Soft ware 1pcs; 2Gmemory card(in host) 1pcs.