Product Introduction
The YDPQ200-A Online Power Quality Monitoring Device (hereinafter referred to as YDPQ200-A or the device) is a new-generation online power quality monitoring device independently developed by Guangdong Yada Electronics Co., Ltd. The device features high-precision measurement and metering functions, scheduled recording and time-of-use billing functions, as well as rich power quality monitoring functions. It complies with the latest seven national standards for power quality and the national standard for general requirements of power quality monitoring equipment, integrating harmonic analysis, waveform sampling, voltage swell/sag recording, flicker monitoring, voltage unbalance measurement, instantaneous waveform capture, event recording, measurement and control, etc. It meets the Class A standard for power quality monitoring and has accurate fault diagnosis and positioning functions. For local abnormalities or faults in the power supply and consumption system, it accurately records a large amount of waveform and event information, sensitively identifies and accurately judges potential, instantaneous or persistent local faults, ensuring the safe and reliable operation of the user’s power supply and consumption system.
The YDPQ200-A device samples 1024 points per cycle with high measurement accuracy and full electrical quantity measurement. It has ultra-large capacity data storage and recording, with recorded data storable for more than half a year. It is equipped with a 5.7-inch large-screen high-resolution TFT color LCD display and an aluminum alloy high-grade metal casing with an exquisite and beautiful appearance.
Key Features
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Class A High Precision
Voltage/current ±0.1%, energy 0.2S class, compliant with national Class A power quality standard.
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Full-Dimensional Monitoring
Covers steady-state, transient and instantaneous monitoring; 2–63rd harmonics, flicker, unbalance, voltage sag/swell/interruption.
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High-Speed Sampling & Capture
1024 points per cycle, 20μs transient capture, high-speed waveform recording for fault diagnosis.
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Ultra-Large Capacity Storage
16GB memory, supports over half-year statistical recording and long-term data storage.
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Standard Communication & Timing
Supports Modbus RTU/TCP, IEC 61850, GOOSE; multi-mode precise timing: SNTP, IRIG-B, PPS, GPS.
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Rich Interfaces & Easy Operation
5.7-inch color TFT LCD, dual Ethernet, dual RS485, GPS, USB; compact size, high cost-performance.
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Standard Data Formats
Supports PQDIF & COMTRADE for standard power quality data exchange.
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Wide Application
Ideal for chemical, steel, hospital, data center, new energy and other power-quality-sensitive fields.
Technical Specifications Description Technical Indicator Type Power Quality Analyzer (Online Power Quality Monitoring Device) Model YDPQ200-A Display 5.7 inch TFT LCD Accuracy Voltage ±0.1%, Current ±0.1%, Energy 0.2S Class Wiring Method Three-phase Four-wire or Three-phase Three-wire Rated Voltage 57.7V/100V or 220V/380V Rated Current 5A, 1A Frequency Range 42.5Hz – 57.5Hz Auxiliary Power Supply AC85V~AC265V, 50/60Hz or DC100V~DC330V,
Maximum Power Consumption ≤8WOperating Environment Operating Temperature: -25℃~+55℃,
Humidity: 5%~95%RH (non-condensing)Communication Port 2*RS485, 2*Ethernet port RJ45,1*USB port Communication Protocol ModBus-RTU, ModBus-TCP, IEC61850,GOOSE Standards IEC 61000-4-30
IEC 61000-4-15
GB/T 14549 Harmonics
GB/T 12325 Voltage Deviation
GB/T 15543 Three-Phase Voltage Unbalance
GB/T 15945 Frequency DeviationDimension (144±0.5)mm×(144±0.5)mm×(121±0.5)mm (including ternimals) Installation Panel mouted: (138±0.5)mm×(138±0.5)mm
YDPQQ200‑A Power Quality Analyzer VS Ordinary Power Meter
| Item | YDPQ200‑A Power Quality Analyzer | Ordinary Power Meter |
|---|---|---|
| Product Positioning | Class A professional on‑line power quality monitoring device | Basic electrical parameter measuring meter |
| Core Functions | Full‑dimension monitoring (steady‑state + transient + instantaneous)
Harmonics, flicker, unbalance, sag/swell/interruption, event waveform recording |
Only measures basic values: voltage, current, power, energy, etc. |
| Monitoring Accuracy | Voltage/Current: ±0.1%; Energy: Class 0.2S | Mostly ±0.5% or lower, no power quality metering capability |
| Sampling & Capture | 1024 points per cycle, 20μs transient capture | Low‑speed sampling, no transient/instantaneous capture |
| Data Storage | 16GB, supports up to half‑year statistical recording | No storage or very small capacity storage |
| Data Format | Standard exchange formats: PQDIF, COMTRADE | No standard format, local display only |
| Communication Protocols | Modbus RTU/TCP, IEC 61850, GOOSE | Basic Modbus/RS485 only |
| Time Synchronization | SNTP, IRIG‑B, PPS, GPS | No precise time synchronization |
| Hardware Interfaces | 2×RS485, 2×Ethernet, GPS, USB, 5.7-inch color LCD | Single RS485, small/no screen, minimal interfaces |
| Application Scenarios | Power quality‑sensitive fields: chemical, steel, hospital, data center, new energy | Ordinary buildings, conventional power distribution monitoring |
Wide Application
Related Application Solutions
Data Center Power Monitoring System
Energy Management System
Power Monitoring System
Power IOT Cloud Platform
Substation O&M Cloud Platform
Related Blogs for Reference
Ultimate Guide to Power Quality Analyzers
How to Optimize Power Quality in Large-Scale Data Centers
Best Power Quality Analyzer 2026
Request A Power Quality Analyzer Quote
Send the phase configuration, maximum load current, required accuracy class, communication protocol and whether the reading is used for billing. YADA’s engineering team confirms the model and CT ratio.