conform toAWhat are the functional characteristics of the online monitoring device for power quality in class standards

1、 Functional Features

1、 safe and reliable

Voltage input adopts high voltage isolation moduleThe current input adopts a high-precision current transformer to safely isolate the input signal from the measurement system. Greatly improved the anti-interference ability of the instrument.

2、 Easy to use

Adopting a Chinese interface and simple button operation, it is convenient for users to use.

3、 high precision

comply with national standardsALevel instrument requirements. Reference algorithms are used for harmonics, three-phase unbalance, flicker, and fluctuations without approximation

Calculation, using high precisionA/D（16 Bit), simultaneous sampling, acquisition rate12.8 kHz.

4、 Strong software functionality

adoptDSP+ARM+CPLDKernel, fast processing speed, and rich software functions make the instrument suitable for complex testing tasks

The work and data processing have greatly improved the efficiency and level of testing.

5、 communication interface(485, Ethernet port)

6、 Multiple testing parameters

System frequency, grid harmonics, three-phase voltage imbalance, voltage fluctuations and flicker, voltage deviation, effective fundamental voltage

Value and true effective value, fundamental effective value and true effective value of current, fundamental active power, active power, fundamental apparent power2-63

The parameters specified in the five national standards for power quality, including subharmonics and true power factor.

7、 High-capacity storage

The device is built-in512MMemory, to5Store data in minutes and store one year's historical data in a single channel,

8Multiple relay contacts can be provided;

9Using benchmark algorithms for approximate calculations of harmonics, three-phase unbalance, flicker, and fluctuations, with high precisionA/D（16 Bit), simultaneous sampling, acquisition rate12.8 kHz, in compliance with national standardsALevel instrument requirements.

10Backend monitoring and analysis systemsupport：Real time data, waveforms, and spectra are displayed on any line of any monitored substation; Output various functional curves and enable scaling, translation, and comparison of curves; Generate power quality；Automatically output power quality statistical reports, maximum statistical values95% probability value, minimum value, average value.

IItechnical indicators

1、 frequency measurement

Measurement range:45～65Hz, center frequency50HzMeasurement condition: The fundamental component of the signal is not less than80％F.S.

Measure Wu difference:≤0.02Hz

2、 Input voltage range:AC10～120VorAC10～400V

3、 Input current range:5A/1A

4、 Fundamental voltage and current amplitude: Fundamental voltage is allowedwupoor≤0.5％F.S.Allowable error of fundamental current≤1％F.S.

5、 Measurement of phase difference between fundamental voltage and currentwuPoor:≤0.5°

6、 Measurement of harmonic voltage contentwuPoor:≤0.1％

7、 Measurement of harmonic current contentwuPoor:≤0.2％

8、 Three phase voltage imbalancewuPoor:≤0.2％

9、Unbalance degree of three-phase current:≤1%；

10、voltage deviationwuPoor:≤0.2％

11、Voltage variationwuPoor:≤0.2％

12、powerwuPoor:≤0.5％

13、FlickerwuPoor:≤5％