High-precision power analyzers are sometimes called broadband power analyzers or variable-frequency power analyzers according to their characteristics. High-precision power analyzer is a new type of measuring equipment used for voltage, current, power, harmonics and other power testing and measurement of various frequency conversion speed control systems. Basic instruments are also an indispensable tool for energy efficiency evaluation of inverter equipment.
High-precision power analyzers are mainly used in product inspection and testing, energy efficiency evaluation and power quality analysis in the fields of electric propulsion, motors, fans, pumps, wind power generation, rail transit, electric vehicles, frequency converters, special transformers, fluorescent lamps, LED lighting, etc. .
High-precision power analyzer functions and requirements
(1) The instrument is equipped with voltage and current probes to meet the functional test requirements of the inverter, and is equipped with a star-angle converter to meet the efficiency test requirements of the inverter without isolation.
(2) The instrument can test the inverter's efficiency, harmonics, grid-connected power, power factor, resonance frequency, fundamental frequency current and other parameters.
(3) Instruments with analysis software can easily obtain measurement results.
(4) The equipment meets the technical requirements of Q/GDW 480_2010 Distributed Generation Access Network Technical Regulations CGC/GF004: 2011 Grid-connected photovoltaic power generation dedicated inverter.
(5) Bandwidth: DC-3MHz.
(6) The basic voltage accuracy is not less than: 0.05% (reading error) + 0.05% (range error)
(7) The basic current accuracy is not less than: 0.05% (reading error) + 0.05% (range error).
(8) DC current input range: 30mA-10Arms. DC voltage input range: 300mVrms-1000Vrms. The maximum allowable instantaneous input voltage is 2kVpek.
(9) The common mode rejection ratio of current and voltage input is not less than 120 dB 100 @ kHz.
(10) The precision of A/D conversion is not less than 24 bits.
(11) The display screen is not less than 5.7 inches, and the display update rate of the value can be adjusted, ranging from 15ms to 3600s.
(12) The precision and stability period of the instrument is not less than 2 years, and the calibration period of the instrument is not less than 2 years.
(13) The sampling rate shall not be lower than 341KHz.
(14) The harmonic analysis of the instrument must meet the latest IEC61000-4-7:2002 standard.
(15) User-selectable data analysis integration time can be adjusted from 15 ms to 3600 s.
(16) All inputs to the instrument must be galvanically isolated to avoid short circuits in various applications.
(17) It must include PC software that can be used to set up, download, analyze and write reports.
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