▶ Reliable

The voltage input adopts a high-voltage isolation module, and the current input adopts a high-precision current transformer to isolate the input signal from the measurement system. Greatly improved the anti-interference ability of TZY-PQ2000A.

▶ Easy to use

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

▶ High precision

Meets the requirements of national standard B-level instruments. The benchmark algorithm is used for harmonic and three-phase imbalance, without approximate calculation. High precision A/D (16 bit) is used, and sampling is performed simultaneously at a rate of 12.8 kHz.

▶ Strong software functionality

The TZY-PQ2000A adopts DSP+ARM+CPLD core, with fast processing speed and rich software functions, making it suitable for complex testing and data processing work, greatly improving testing efficiency and level.

Communication interface (RS-232/485, network port)

The TZY-PQ2000A power quality online monitoring device usually uses RS232 to RS485 communication. If Ethernet communication is required, it needs to be separately stipulated in the contract.

Pin 2: Sending end of RS232

Pin 3: RS232 receiver

Pin 5: Grounding terminal of RS232

▶ Multiple testing parameters

System frequency, three-phase voltage imbalance, voltage deviation, frequency deviation, voltage fundamental effective value and true effective value, current fundamental effective value and true effective value, apparent power, active power, reactive power, 2-63rd harmonic, 50th harmonic, power factor and other parameters specified in the national standard for power quality.

▶ Large capacity storage

The online power quality monitoring device has a built-in 512M memory that stores data in 5-minute units. Each channel can continuously store historical data for 3 months.

▶ Measure and analyze the quality of AC power supplied by the public power grid to the user end, including voltage deviation, frequency deviation, three-phase voltage imbalance, grid harmonics, and interharmonics.

▶ Apply wavelet transform to measure and analyze the harmonics of non-stationary time-varying signals.

▶ Measure and analyze the impact of various electrical equipment on the power quality of the public grid under different operating conditions.

▶ Load fluctuation monitoring: Regularly record and store power parameters such as voltage, current, active power, reactive power, frequency, phase, etc.

▶ The characteristics of online, multi parameter, large capacity, high precision, and the application of modern signal analysis theory make TZY-PQ2000A widely applicable in fields such as power transmission and distribution, power electronics, and motor drive.

▶ Frequency measurement

Measurement range: 45-55Hz, center frequency 50Hz, measurement conditions: the fundamental component of the signal is not less than 80% F.S

Measurement error: ≤ 0.02Hz

▶ Input voltage range: 10-400V

▶ Input current range: 5A

▶ Fundamental voltage and current amplitude: The allowable error of fundamental voltage is ≤ 0.5% F.S; The allowable error of fundamental current is ≤ 1% F.S

▶ Measurement error of phase difference between fundamental voltage and current: ≤ 0.5 °

▶ Measurement error of harmonic voltage content: ≤ 0.1%

▶ Measurement error of harmonic current content: ≤ 0.2%

▶ Error of three-phase voltage imbalance: ≤ 0.2%

▶ Voltage deviation error: ≤ 0.2%

▶ Power deviation: ≤ 0.5%