Product Introduction

Harmonic pollution in the power grid directly affects the quality of power supply operation and the economic benefits of the power sector.
SF DZ-4Portable power quality analyzerWe have adopted our company's self-developed new generation instrument hardware and software universal platform. Conduct long-term or short-term online monitoring of grid voltage, current, and power; At the same time, it also has the functions of electrical parameter testing and vector analysis. Adhere to the six national standards for power quality; Evaluate the power quality of the power grid system, analyze various harmonic sources in the power grid, and select appropriate filtering and compensation devices. To develop a plan for purifying harmonic pollution in the power grid and provide reliable detection methods.
---------★ Main features ★---------
◆Adopting high-performance dual core CPU, embedded industrial control board and 32-bit floating point digital signal processor (DSP) as the core.

◆Modular structure, reasonable design, and reliable operation.

◆Adopting an 8-inch color LCD display with a fully Chinese interface and user-friendly design, it is easy to operate and convenient to use.

◆Equipped with high-performance solid-state drives to replace traditional mechanical hard drives, meeting the requirements for data storage.

◆The instrument has a USB interface, which can easily copy data directly to the backend management computer.

◆External large capacity, high-performance lithium-ion rechargeable battery, fully charged and continuously working for 6 hours.

◆Small in size, light in weight, and easy to carry, it can be used for on-site measurement or as a standard measuring equipment in the laboratory.

---------★major function★-----------
◆Steady state seamlessPower quality monitoringAnalysis: Harmonics (2-63 times) and interharmonics (0.5-62.5 times), phase angle, frequency, three-phase imbalance (negative sequence, positive sequence, zero sequence), voltage deviation, voltage fluctuation, and flicker.

◆Transient power quality monitoring analysis: voltage surge, voltage drop, and short-term voltage interruption.

◆Power analysis: active power, reactive power, apparent power, power factor, and electrical quantity recording.

◆Event triggered recording and playback: According to the event triggering conditions (manual or automatic), real-time data before and after event triggering is recorded and saved, and event logs are saved for query.

◆Real time display: equipped on the instrument panel8Inch color LCD screen,Real time display of data, waveform, spectrum, and vector maps for various indicators of power quality.

◆Record: The instrument is equipped with a large capacity solid-state drive, which can save basic and advanced monitoring indicators in real-time. The storage interval of 3-60 seconds can be set arbitrarily, and storing a set of data in 60 seconds can save 20 days of historical data without losing power.

◆Settings: Basic parameters of the instrument can be set, modified, and viewed.

◆Communication: The instrument provides multiple communication interface methods to achieve real-time transmission of monitoring data or timed extraction and storage records. It can communicate with the remote power quality management center through an industrial Ethernet interface, or directly copy the data to the backend management computer through a USB flash drive.
---------★Technical indicators★--------

◆Harmonic analysis range: 2-63 times
◆Voltage measurement range: 10~800V
◆Current measurement range: 0.05~6A
◆Frequency measurement range: 42~62Hz
◆Grid frequency error: ≤ 0.01Hz
◆Voltage deviation error: ≤ 0.2%
◆Voltage variation error: ≤ 0.2%
◆Flicker error: ≤ 5%
◆Three-phase voltage imbalance error: ≤ 0.2%
◆Harmonic measurement error: meets the requirements of national standard A-level instruments
◆Interharmonic error: meets the requirements of national standard A-level instruments

◆Phase angle measurement range: 0-359.99 °

◆Maximum working time of battery: ≤ 6 hours

◆Charging power supply: AC220V, frequency 45-55Hz

---------★Executive standards★---------
◆GB/T 19862-2005General requirements for power quality monitoring equipment
◆GB/T 14549-1993Power quality - Harmonics in public power grids
◆GB/T 12325-2008Permissible deviation of power supply voltage for power quality
◆GB 12326-2008Power quality - Voltage fluctuations and flickers
◆GB/T 15543-2008Power quality - Permissible imbalance of three-phase voltage
◆GB/T 15945-2008Power quality - Permissible deviation of power system frequency
◆GB/T 24377-2009Power quality - Harmonics between public power grids