1 Overview
With the rapid development of our national economy, power load a sharp increase, especially the growing impact and nonlinear loads, the power waveform distortion, voltage fluctuation and flicker and three phase imbalance of power quality problems. YX-DZ3000 power quality measurement instrument company (hereinafter referred to as YX-DZ3000) is a high performance multi function power quality test and analysis instrument. The kernel of DSP+ARM+CPLD is used, the 5.7 "large screen liquid crystal display (320 x 240 dot matrix), to make the structure more compact, more powerful.
The 2 main purposes
2.1 measurement and analysis the utility grid for to the user end of the AC power quality, the measurement and analysis: frequency deviation, voltage deviation, voltage fluctuation and flicker, three-phase voltage unbalance, harmonic allowed.
2.2 the application of wavelet transform to measure harmonic analysis of non-stationary signal.
2.3 measurement analysis of various power quality to the public power grid in different operation state of electric equipment.
2.4 load fluctuation monitoring: timing recording and storing the voltage, current, active power, reactive power, apparent power without, frequency, phase and power parameters change trend.
2.5 electric power equipment of dynamic adjustment and operation process monitoring, appear to help users solve the process of power equipment adjustment and commissioning in question.
The 2.6 test in the analysis of power system circuit breaker, transformer overheating, motor burned, automatic device malfunction faults such as.
2.7 test analysis of non power compensation and filtering device in power system dynamic parameters and make quantitative evaluation on its function and technique index.
2.8 portable, multi parameter, large capacity, high precision and modern signal analysis theory and application characteristics, so that YX-DZ3000 can be widely used in power transmission and distribution, power electronics, motor etc..
3 main functions and features
3.1 safe and reliable
Voltage input high voltage isolation module, input current with high precision current transformer to the input signal and the measurement system safety isolation. Greatly improve the anti-jamming ability of YX-DZ3000.
3.2 easy to use
The Chinese interface, key operation simple, user-friendly.
3.3 high accuracy
To meet the requirements of national standard A class instrument. The harmonic, three-phase unbalance, flicker and fluctuation are the benchmark algorithm, without approximation calculation, high precision of A/D (16), at the same time sampling, sampling rate of 12.8 kHz.
3.4 software function
The DSP+ARM+CPLD kernel, fast processing speed, feature rich software, make the YX-DZ3000 suitable for complicated test and data processing, greatly improving the testing efficiency and level.
The 3.5 communication interface (RS-232/485)
The sending end pin 2:RS232
The receiving end of the needle 3:RS232
Ground pin 5:RS232
6:RS485 A end of the needle
9:RS485 B end of the needle
3.6 test parameters
System frequency, harmonic, three-phase voltage unbalance, voltage fluctuation and flicker, voltage deviation, voltage effective value and true effective value, fundamental current effective value and true effective value, fundamental active power, active power, fundamental vision parameters specified quality five GB, 2-50 harmonic in power, real power all the power factor.
3.7 large capacity storage
The built-in 512M memory, to 5 minutes for the unit to store data, each channel can store historical data for 4 months.
The 4 technical indicators
The 4.1 frequency measurement
Measuring range: 45 ~ 55Hz, the center frequency 50Hz, measuring conditions: signal fundamental frequency component is not less than 80%F.S.
Error: ≤ 0.02Hz
The 4.2 input voltage range: 10-120V
The 4.3 input current range: 5A
4.4 fundamental voltage and current amplitude: fundamental voltage permissible error ≤ 0.5%F.S.; fundamental current allows error less than 1%F.S.
Error of measuring the phase difference between 4.5 fundamental voltage and current: ≤ 0.5 °
The 4.6 harmonic voltage ratio measurement error: ≤ 0.1%
4.7 harmonic current content measurement error: ≤ 0.2%
4.8 three-phase voltage unbalance error: ≤ 0.2%
The 4.9 voltage deviation error: ≤ 0.2%
4.10 voltage variation error: ≤ 0.2%
4.11 power deviation: ≤ 5%
4.12 flicker error: ≤ 5%
