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MQ579 Multifunctional Three-Phase Power Quality Analyzer
Three-phase analyzer for electrical measurement and power quality analysis with support for Rogowski coils or voltage-output current transformers. It combines data logging, 32 GB memory, and Ethernet plus RS485 communications.
The MQ579 is a multifunctional three-phase power quality analyzer designed for measurement, diagnostics, and maintenance work on electrical distribution systems. When connected to an external Rogowski coil or a voltage-output current transformer, it enables non-disconnect testing, helping reduce downtime and installation costs.
The instrument supports both single-phase and three-phase networks and brings together current, voltage, power, power factor, and energy measurement in one device. It also evaluates power quality parameters such as harmonics, unbalance, inrush, voltage sag, and extreme values, making it suitable for energy audits, commissioning, and switchboard inspection tasks.
Beyond real-time measurement, it provides programmable interval logging and waveform recording. The built-in 32 GB memory supports local data storage, while RJ45 Ethernet and RS485 interfaces allow integration with monitoring platforms through Modbus-TCP and Modbus-RTU.
| Reference | MQ579 |
| Type | Three-phase power quality analyzer |
| Application | Power analysis, electrical measurement, and power quality monitoring |
| Wiring systems | 3P4W_4CT, 3P4W_3CT, 3P3W_3CT, 3P3W_2CT, 1P3W, 1P2W |
| Compatible sensors | MQ579N, MQ579C, Rogowski coil, voltage-output CT, current-output CT |
| Voltage access | Direct connection or through a voltage transformer |
| Storage | Integrated 32 GB TF card |
| Data export | USB export with FAT32 file system |
| Communications | RJ45 Ethernet and RS485 |
| Protocols | Modbus-TCP and Modbus-RTU |
| Power supply | 95~265 VAC / 110~370 VDC; 5~36 VDC; 90~528 VAC depending on version |
| Maximum consumption | 5 VA |
| Display | 3.5 inch IPS, 480 x 800 |
| Dimensions | 96 x 96 x 94 mm |
| Weight | 850 g |
| Operating temperature | -20 C to +55 C, humidity below 90% RH |
| Storage temperature | -40 C to +70 C, humidity below 95% RH non-condensing |
| Altitude | Up to 2 km |
| Measurement category | CAT III 600 V |
| Protection | IP30 |
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