The PQMII-T20 is a high-performance Power Quality Monitor, primarily used in industrial and commercial power systems to conduct real-time monitoring, analysis, and recording of power quality parameters. It helps users identify issues in power systems such as harmonics, voltage fluctuations, and flicker, ensuring the safe and stable operation of electrical equipment while optimizing power usage efficiency. Below is its detailed information:
- Monitored Parameters:
- Basic Electrical Parameters: Three-phase voltage, current, active power, reactive power, apparent power, power factor, frequency, etc.
- Power Quality Parameters: Total Harmonic Distortion (THD), individual harmonic components (typically supporting up to the 50th harmonic), voltage fluctuation and flicker, three-phase unbalance, voltage swell/sag/interruption, inrush current, etc.
- Measurement Accuracy: Complies with the IEC 61000-4-30 Class A standard (high-precision grade). The measurement accuracy of voltage and current is usually ±0.2%, and the power measurement accuracy is ±0.5%, ensuring data accuracy and reliability.
- Sampling Rate & Data Recording:
- High sampling rate (typically 256 points per cycle or higher), capable of capturing fast-changing power transient events.
- Supports long-term data recording with built-in large-capacity storage (or expandable via SD card). It can record trend data, event waveforms, and harmonic spectra, with flexibly configurable recording intervals (e.g., 1 minute, 5 minutes).
- Communication Interfaces:
- Standard Ethernet ports (EtherNet/IP, Modbus TCP/IP) for communication with SCADA systems, Energy Management Systems (EMS), or host computer software.
- Optional RS485 (Modbus RTU) and USB interfaces for local data export or connection to external devices (e.g., printers, sensors).
- Some models support wireless communication (e.g., 4G, Wi-Fi) for remote data transmission and monitoring.
- Power Requirement: Wide voltage input range (typically 85-265VAC) to adapt to power grids in different regions, with low power consumption (usually less than 10W).
- Operating Environment:
- Operating temperature: -20°C to 60°C
- Humidity: 5% to 95% RH (non-condensing)
- Protection rating: IP20 (panel-mounted) or IP65 (outdoor models), suitable for industrial sites or distribution room environments.
- Comprehensive Power Quality Analysis: Real-time monitors and analyzes various power quality issues, generating detailed harmonic spectra, trend curves, and event records. This helps engineers quickly locate the causes of power grid anomalies (e.g., equipment interference, transformer overload).
- Event Capture & Alarm: Presettable thresholds (e.g., voltage over-limit, excessive harmonics) trigger automatic alarms (audible-visual alarms, relay output) when abnormalities are detected. It also records waveform data before and after the event, providing a basis for fault analysis.
- Data Visualization & Reporting: Equipped with a color touchscreen (or via supporting software) to intuitively display real-time data, historical trends, and analysis results. It supports automatic generation of power quality reports (in formats compliant with IEC, IEEE, etc.), facilitating compliance audits and system evaluations.
- Flexible Installation & Configuration: Supports panel-mounted, DIN rail-mounted, or embedded installation to adapt to different distribution cabinet structures. Parameters such as monitored items, alarm thresholds, and communication protocols can be customized via software to meet personalized needs.
- Anti-Interference & Reliability: Adopts an industrial-grade design with strong electromagnetic interference (EMI) protection and built-in surge protection circuits, ensuring stable operation in complex power grid environments.
- Monitoring of power distribution systems in industrial plants (e.g., manufacturing facilities, automobile factories) to protect precision equipment from voltage fluctuations.
- Power quality monitoring in commercial buildings (office buildings, shopping malls) to optimize energy distribution and reduce equipment failure rates.
- Grid-connected power quality analysis in new energy fields (photovoltaic power plants, wind farms) to ensure compliance with grid connection standards.
- Power monitoring in scenarios with high reliability requirements (data centers, hospitals) to prevent equipment downtime caused by power quality issues.
- Monitoring of power distribution networks by power utilities to evaluate grid health and develop improvement plans.
- Comes with dedicated analysis software (e.g., PQMII Viewer) that supports data import, waveform analysis, report generation, and remote configuration.
- Compatible with mainstream industrial communication protocols, enabling seamless integration into Energy Management Systems (EMS), Building Automation Systems (BAS), or SCADA systems for centralized monitoring.
- Some versions support cloud platform access, allowing remote viewing of real-time data and alarm information via web pages or mobile apps, simplifying operation and maintenance management.
With its high-precision measurement capabilities and comprehensive analysis functions, the PQMII-T20 serves as a key tool for power system operation and maintenance and energy management, widely used in various scenarios requiring reliable power quality assurance.
