POWER QUALITY ANALYSER

Introduction:

The Sonel PQM-711 is a versatile, Class A power quality analyzer designed for comprehensive measurement, analysis, and recording of 50/60 Hz power network parameters. It is suitable for a wide range of electrical networks with rated voltages from 110 V to 1000 V, either through direct connection or indirectly via voltage transformers. Based on advanced measurement technology, the PQM-711 provides comprehensive power quality assessment in accordance with the EN 50160 standard and supports a broad range of applications in power generation, transmission, distribution, industrial facilities, renewable energy installations, and electrical infrastructure. The analyser combines advanced power quality measurement with 4G LTE/GSM, Wi-Fi, and GPS communication, enabling remote supervision, data transfer, time synchronization, and anti-theft protection.

Key Features:

• Class A power quality measurement for professional power network analysis.
• Remote control and data transfer through the built-in 4G LTE/GSM modem.
• Wi-Fi communication for convenient local wireless access and data transfer.
• GPS receiver for accurate real-time clock synchronization.
• Anti-theft protection with SMS notification when a change in the analyser's position is detected.
• Remote operation using Sonel Analysis software for Windows via Wi-Fi or GSM.
• Remote operation using Sonel Analysis Mobile for Android via Wi-Fi.
• Measurement and recording of voltage and current events with waveform and RMS1/2 analysis.
• Transient recording with a sampling frequency of up to 10 MHz and a voltage range of up to ±8000 V.
• Compatibility with a wide range of current and voltage transducers.
• Comprehensive four-quadrant power and energy analysis.

Measured Parameters:

Transients

The PQM-711 provides high-speed transient detection and recording:

• Transient voltage measurement up to ±8000 V.
• Maximum sampling frequency of 10 MHz.
• Minimum detectable transient duration of 650 ns.
• Transient recording capability available specifically on the PQM-711.

Voltage

Five voltage measurement inputs are provided for L1, L2, L3, N, and PE.

The analyser measures:

• Average voltage.
• Minimum voltage.
• Maximum voltage.
• Instantaneous voltage.
• Voltage within a range of up to 1000 V.
• Compatibility with voltage transducers.

Current

Four current measurement inputs are provided for L1, L2, L3, and N.

The analyser measures:

• Average current.
• Minimum current.
• Maximum current.
• Instantaneous current.
• Current measurements up to 6 kA, depending on the current clamp used.
• Compatibility with current transducers.

Current clamps are optional accessories and must be purchased separately, except for the PQM-711 Pro and PQM-710 Pro versions, which are supplied with four F-3A flexible current clamps.

Additional Electrical Parameters

The PQM-711 measures and calculates:

• Control signals up to 3000 Hz.
• Voltage crest factor (CFU).
• Current crest factor (CFI).
• Frequency from 40 Hz to 70 Hz.
• Active power (P).
• Reactive power (Q).
• Distortion power (D).
• Apparent power (S).
• Nature of reactive power: capacitive or inductive.
• Active energy (EP).
• Reactive energy (EQ).
• Apparent energy (ES).
• Power factor.
• cosφ.
• tanφ.
• K-factor for assessing transformer overload caused by harmonics.

Reactive power can be calculated using both the Budeanu method and the IEEE 1459 method.

Harmonics & Power Quality

The PQM-711 provides comprehensive harmonic and power quality analysis, including:

• Voltage harmonics up to the 50th harmonic.
• Current harmonics up to the 50th harmonic.
• Inter-harmonics measured as groups.
• Total Harmonic Distortion (THD) for voltage and current.
• Short-term flicker (PST) according to IEC 61000-4-15 Class A.
• Long-term flicker (PLT) according to IEC 61000-4-15 Class A.
• Voltage unbalance according to IEC 61000-4-30 Class A.
• Current unbalance.

Event Recording

The analyser provides advanced event detection and recording capabilities for both voltage and current. Features include:

• Current event detection with waveform recording.
• Voltage event recording with waveform analysis.
• Current event recording with waveform analysis.
• Waveform recording of events for up to 1 second.
• RMS1/2 graphs with a maximum recording time of 30 seconds.
• Recording of voltage and current waveforms after each averaging period.

These functions allow users to investigate disturbances, identify the causes of power quality problems, and evaluate the condition of electrical equipment and networks.

Wide Range of Mains System

The PQM-711 supports 50 Hz and 60 Hz systems and a wide range of rated voltages:

• 64/110 V
• 110/190 V
• 115/200 V
• 120/208 V
• 127/220 V
• 133/230 V
• 220/380 V
• 230/400 V
• 240/415 V
• 254/440 V
• 265/460 V
• 277/480 V
• 290/500 V
• 400/690 V
• 480/830 V

The analyser can also be used with DC systems and supports a wide range of network configurations:

• Single-phase systems.
• Split-phase systems with common N conductor.
• Three-phase WYE systems with or without N conductor.
• Three-phase Delta systems.
• Three-phase, two-element WYE systems without N conductor (Aron/Blondel).
• Three-phase, two-element Delta systems (Aron/Blondel).
• Systems using current and voltage transducers.

Advance Communication & Remote Operation

The Sonel PQM-711 incorporates a GPS receiver, 4G LTE/GSM modem, and Wi-Fi communication module, providing flexible options for remote monitoring and data management.

4G LTE/GSM

The built-in 4G LTE/GSM modem enables:

• Remote control of the analyzer.
• Remote access to measurement data.
• Remote monitoring of selected network parameters.
• Data transfer over cellular networks.
• Remote diagnostics without requiring physical access to the analyzer.

GPS

The integrated GPS receiver provides:

• Accurate real-time clock synchronization.
• Precise time stamping of measurement data.
• Anti-theft functionality through position monitoring.
• SMS notification when a change in the analyzer's position is detected.

WI-FI

The integrated Wi-Fi module provides convenient local wireless communication without the limitations of wired connections.

Benefits include:

• No restrictions associated with physical cable connections.
• No additional data-transfer costs when using a local wireless network.
• Convenient transfer of recorded measurement files.
• Remote supervision from a laptop, tablet, or smartphone.
• Flexible installation in locations where electromagnetic interference may make direct user access inconvenient.

Data Display & Supervision

The PQM-711 can be operated and monitored using a touch-screen computing device running Sonel Analysis for Windows or Sonel Analysis Mobile for Android.

The analyzer can function as a remote measurement device, display interface, and intermediate data-storage unit. It can also operate as a communication router, allowing users to connect wirelessly and transfer recorded measurement data to a desktop computer.

This enables technicians to supervise measurements and perform diagnostics from a convenient location without needing to remain next to the analyzer.

Sonel Analysis Software

Sonel Analysis is the software supplied for use with PQM-series power quality analyzers. It provides comprehensive tools for analyzer configuration, measurement supervision, data management, analysis, reporting, and firmware updates.

Depending on the analyzer model and communication method, the software enables:

• Analyzer configuration.
• Reading data from the analyzer's memory.
• Real-time monitoring of network parameters.
• Remote data reading via 4G LTE/GSM.
• Deletion of stored measurement data.
• Data presentation in tables.
• Data presentation in charts and graphs.
• Power quality analysis.
• Generation of reports according to EN 50160.
• Analysis using user-defined reference conditions.
• Support for PV micro-installations up to 50 kW.
• Analysis of active power states P > 0, P < 0, and P = 0.
• Analysis using Q1 = f(U1/Un) and cosφ = f(P/Pn) graphs.
• Independent support for multiple analyzers.
• Analyzer firmware updates.

Real Time Visualization

Sonel Analysis enables selected parameters to be displayed and visualized in real time, independently of the measurement registration stored in the analyzer.

The user can view:

• Voltage and current waveforms using an oscilloscope view.
• Voltage and current trends over time.
• Phasor diagrams.
• Multiple electrical parameters simultaneously.
• Harmonics and harmonic powers.
• Harmonic direction estimation.
• Inter-harmonics.

Applications

The Sonel PQM-711 is designed for professional power quality investigations across a wide range of applications.

Typical applications include:

• Power generation and distribution networks.
• Industrial electrical installations.
• Renewable energy systems.
• Photovoltaic installations.
• Wind farms.
• Electrical infrastructure development.
• Transformer and network load-capacity assessment.
• Power quality troubleshooting.
• Preventive maintenance and failure prediction.
• Verification of electrical installation performance.
• Investigation of voltage and current disturbances.
• Assessment of harmonics, flicker, unbalance, and other power quality problems.
• Monitoring of the operating condition of networks and transformers.
• Collection of technical data for power infrastructure planning.
• Verification of the quality and correctness of electrical installations.

With its four-quadrant power analysis capability, the PQM-711 is suitable for both energy consumers and energy producers, including renewable energy installations.

The analyzer provides valuable information for identifying potential network problems, forecasting failures, assessing infrastructure requirements, and verifying the quality of completed electrical installations. The Sonel PQM-711 combines Class A power quality measurement, high-speed transient recording, advanced harmonic analysis, event recording, four-quadrant power measurement, GPS synchronization, and remote communication in a single professional instrument. Its combination of 10 MHz transient sampling, ±8000 V transient measurement, 4G LTE/GSM connectivity, Wi-Fi communication, GPS synchronization, and comprehensive EN 50160 power quality analysis makes it a powerful solution for diagnosing electrical networks, monitoring renewable energy systems, assessing transformers and distribution networks, and supporting long-term power infrastructure planning.

Available Models: PQM-700, PQM-707, PQM-710, PQM-710 Pro, PQM-711, PQM-711 Pro, PQM-750

Product Link: https://sonel.pl/en/product/power-quality-analyzer-sonel-pqm-711-pro