PQM4000 Power Quality Analyser – Class A

$7,726.00$9,135.00 excl. GST

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  • Continuous monitoring of power quality data including:
    • Harmonics and interharmonics
    • Flicker
    • Power parameters
    • Unbalance
    • Mains signaling components
  • IEC/EN 61000-4-30:2015 Ed.3, Class A certified for measurements of voltage characteristics.
  • Acts as an event or fault recorder, able to store a large number of voltage events and disturbances, variation of frequency and inrush current, etc.
  • High-resolution capacitive touch screen.
  • Embedded webserver (complete device management for PQM4000).
  • RTC (real-time clock) synchronisation for accurate time information.
  • Data recording for statistical analysis according to EN 50160, with data recorded in standard PQDIF and CSV file formats.
  • Integrated backup rechargeable battery.
  • Two Ethernet ports (front and rear), one RS485 port, and a USB port for communication and data transfer.

Product Description

The Algodue PQM4000 Class A power quality analyser is a high-end power monitoring device that is able to measure and report power quality parameters in compliance with EN 50160. The PQM4000 provides advanced and highly accurate (+/- 0.2% accuracy) measurements of voltage, current, power, power quality, events, and faults. Monitoring is provided according to the IEC/EN 61000-4-30 Class A specification and standards.

In addition to standard three-phase power monitoring, the PQM4000 acts as an event/fault recorder, capable of storing a high number of voltage events and disturbances, frequency variations, inrush currents, etc. Additional power quality data can also be recorded, such as Flicker, Imbalance, Harmonics, Interharmonics, and Mains Signalling. Furthermore, additional voltage and current measurement channels provide the option to monitor Neutral Potential and Earth Leakage current.

With a built-in high-resolution capacitive touch screen and integrated webserver, the unit can easily be read locally and remotely, for quick analysis of recent power recordings, events or faults.

The device includes a range of communication ports for access to realtime and stored data. The Ethernet ports on the front and rear panels allow for flexible accessibility to local networks, also allowing for real-time monitoring, device setup, stored data transfer, maintenance operations via the integrated Webserver. An RS485 port allows for the connection of the device with other monitoring systems, such as a PLC or BMS.

An integrated GPS receiver provides accurate time information regardless of the location the meter is installed to ensure data and event reporting is provided along with accurate time data.

This advanced power monitoring device is best suited for HV, MV, and LV applications typically in large commercial and industrial facilities, or where monitoring power quality is important for the protection of sensitive electronic equipment.

Technical Features



  • Three-phase voltage: ±0.1% Un over 10 – 150% Un range
  • 4th voltage: ±0.2% measurement
  • Current: ±0.2% measurement (device)
  • Power: ±0.2% measurement
  • Frequency: ±10 MHz
  • Harmonics: Class 1 (IEC/EN 61000-4-7)
  • Internal clock (RTC):
    • ‹1 s for 24h period without synchronisation
    • ‹5 ms with GPS synchronisation
    • ‹500 ms with NTP synchronisation
  • Active energy (FS = 5 A): Class 0.2S, compliant to IEC/EN 62053-22
  • Reactive energy: Class 1, compliant to IEC/EN 62053-23

Voltage & Frequency

  • Voltage inputs for direct connection: Phase-neutral (L-N): max 580 V RMS CAT III
  • Phase-phase (L-L): max 1000 V RMS CAT III
  • Voltage input crest factor: 2
  • Input impedance (for direct voltage inputs): ›6 MΩ
  • Frequency range: 42.5-57.5 Hz / 51-69 Hz
  • Frequency reference channel: Phase 1/Line 12 voltage
  • Sampling: Simultaneous, 51.2 kHz @50 Hz


  • CT inputs: max 7 A RMS for FS = 5 A, max 1.2 A RMS for FS = 1 A
  • CT burden: 0.04 VA
  • Current input crest factor: 3

Power Supply

  • Auxiliary power voltage: 100-240 V AC 50/60 Hz/65-250 V DC
    • 19-60 V DC on request
  • Auxiliary power consumption: 15 W
  • Fuse (according to the power supply):
    • 250 V AC/500 mA T type delayed (35 A breaking capacity) with 100-240 V AC 50/60 Hz 15W/65-250 V DC power supply
    • 250 V AC/3 A T type delayed with 19-60 V DC power supply
  • Backup battery: Li-Ion, 2500 mAh (>15 min autonomy)


I/O Channels

  • Digital inputs: 4 optoisolated 24 V DC
  • Digital input delay time (1-4): max 10 ms
  • Digital input consumption (1-4): max 7 mA DC
  • Analog outputs: 4 optoisolated 4-20 mA DC/max load 500 Ω
  • Analog output reaction time: max 200 ms
  • Digital outputs: 4 passive optoisolated 24 V DC/max 50 mA
  • Digital output reaction time (DO in Alarm mode): max 1 s
  • Digital output pulse length (DO in Pulse mode): 50 ±2 ms ON time

High-Level Interface

  • Ethernet ports: 2 Auto MDIX RJ45 10/100 Base Ethernet
  • RS485 port: 1 optoisolated, 4800-115200 bps
  • GPS port: 1 SMA female connector
  • WIFI port: 1 SMA male connector
  • Protocols: HTTP, HTTPS, FTP, SFTP, NTP, NMEA, Modbus RTU/TCP

RTC Synchronisation

  • Synchronisation system: NTP and/or GPS

Internal Memory

  • System memory: 128 MB Flash, 256 MB RAM
  • Recording memory: 16 GB

Mechanical Characteristics

  • Mounting: Panel mount 192×144 DIN size
  • Size: Front (LxH): 191×143 mm, Rear (LxHxD): 183x135x190 mm
  • Weight: 1,400 g

Environmental Ratings

  • Installation and use code: PQI-A-FI1-H
  • Operating temperature (limit range): -25 – +55°C (FI1, 3K6)
  • Storage temperature: -25 – +75°C (2K3)
  • Relative humidity: 95% max without condensing
  • Altitude: max 2000 m AMSL
  • Installation & use: Internal

Directive & Standard Compliance

  • Directive: 2014/53/EU
  • Product compliance: IEC/EN 62586-1, IEC/EN 62586-2
  • Safety: EN 61010-1
  • Pollution degree: 2 (EN 61010-1)
  • Protection degree: IP40 front panel, IP20 rear
  • Protection against mechanical impacts: IK06



User Manual

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