Online monitoring device for power quality

Category:AC Power Quality Monitor
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Release date:March 23, 2022
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Detailed introduction

Online monitoring of power quality

Product Overview
SF DZ-3Online monitoring device for power qualityAdopting a high-speed and high-performance dual core processor, it integrates functions such as harmonic analysis, flicker measurement, power measurement, imbalance measurement and fault recording, event recording, etc., recording steady-state and transient data, and deeply exploring the causes of each event. Quickly collect and accurately analyze various power parameters, monitor and evaluate various indicators of power quality.

Product Features
◆ 32-bit high-performance ARM+DSP dual core processor, equipped with large capacity RAM, ensuring fast and reliable digital signal processing and logic processing capabilities;
16 bit high-speed A/D converter with synchronous sampling, 512 sampling points per cycle, high measurement accuracy and fast speed;
Comply with IEC 61000-4-30 Class A standard;
◆ Real time multitasking operating system, modular programming; Good real-time performance and high reliability;
Equipped with network interface and dual RS-485 communication interface, supporting IEC61850;
◆ Support for multilingual operation interfaces;
◆ Built in massive memory, supporting steady-state and transient recording;
◆ Over limit alarm function, with configurable upper and lower limit parameters;
◆ Support PQDIF and COMTRADE file formats;
◆ With multiple monitoring channels, it can simultaneously monitor 20 lines, and any set of analog quantities can be configured as voltage or current at the factory according to user needs;
◆ Adopting a plug-in structure, modular design, good interchangeability, flexible insertion and removal, and convenient maintenance;
◆ Easy to install and operate, using a standard 4U height chassis that can be individually assembled or embedded into existing screens on site;

Product Features

Basic monitoring quantity	Effective values of frequency, voltage, current, total active and reactive power, power factor
Basic monitoring indicators	Grid frequency, effective value of voltage/current, total active/reactive power/power factor Effective value of three-phase fundamental voltage/current, fundamental voltage/current phase, fundamental power/power factor, voltage deviation, frequency deviation, three-phase voltage imbalance, three-phase current imbalance, negative sequence quantity, harmonics (2-50 times), including total harmonic distortion rate of voltage and current, harmonic content, amplitude, harmonic active power, harmonic reactive power, inter harmonics, etc
Advanced monitoring indicators	Voltage fluctuation, flicker, overvoltage, undervoltage, voltage surge, voltage drop, short-term interruption
Other functions	Parameter setting function Record storage function Online statistical function GPS time synchronization function, using GPS B code time synchronization method; System timing. Power loss alarm function

Technical indicators

technical specifications	Parameter indicators
Manufacturer	Baoding Fangchang Electric Power Technology Co., Ltd
Equipment model	SF DZ-3
Number of sampling paths	The number of instrument circuits can be flexibly configured, and a single set of instruments can provide monitoring of up to 20 circuits (3 phases per circuit), which are universal circuits for voltage or current.
Voltage measurement range	AC10～400V
Current measurement range	zero point zero five～6A
Frequency measurement range	forty-five～55Hz
Grid frequency error	≤0.002 Hz
Voltage deviation error	≤ 0.2%
Voltage fluctuation error	≤ 0.2%
Flicker error	≤ 5%
Error in three-phase voltage imbalance	≤ 0.2%
Harmonic measurement error	Meet the requirements of national standard A-level instruments
Interharmonic measurement error	Meet the requirements of national standard A-level instruments
Power error	≤ 0.5%
Display screen	5.6 inch TFT color LCD screen
Working power supply	AC220V± 20% frequency 45Hz~55Hz DC110V/220V±20%
Communication interface; Communication protocol	Supports RS232/RS485/Ethernet port Supports IEC61850, ModBus RTU, IEC60870-05-103 communication protocolsIEC60870-05-104 communication protocol
power dissipation	<20W
Working temperature/humidity	Working temperature -20 ℃~+60 ℃, humidity 5%~95% (non condensing)
size	Standard 4U "19" inch chassis
weight	About 5kg
Installation method	Embedded