ProQ 100 is a true innovation that combines precision class revenue metering with leading edge power quality measurement. The product range covers HV, MV and LV4 configurations for applications at different hierarchy levels in generation, transmission and distribution grids. ProQ 100 provides a wide range of features and meets high accuracy standards while providing power quality measurements in line with the latest power quality standards. ProQ 100 is well suited for use by grid operators and industrial customers to:

  • Monitor and manage electricity grids and supply quality contracts
  • Monitor supply quality and ensure regulatory compliance
  • Analyze industrial plant supply networks for disturbances (origin) and impact on sensitive loads

Standard rack mounting provides the flexibility to retrofit/upgrade existing systems. ProQ 100 has multiple communications channels and standard protocol support, making it easy to integrate with multiple systems for simultaneous communications (e.g. power quality monitoring, SCADA and remote meter reading applications).



  • Power quality assessment in industrial applications

    Modern industrial plants include a wide variety of load types that can be a source of power quality disturbances while also being extremely sensitive to them, e.g. large power electronic converters, ASDs, fluctuating loads and so on. Power quality disturbances are often complicated in an interconnected grid, and disturbances caused by polluting industries go on to affect any other load connected at PCC. Degradation of power quality is typically caused by load switching, non-linear loads, intermittent loads, system faults. Such disturbances give rise to dips, harmonic distortions, interruptions, unbalance and flicker.

    Knowing the reason for these disturbances is the way to prevent power quality deterioration. There can be a variety of ways to provide the required level of power quality, and the simplest and most economical method needs to be selected. The starting point for any mitigation strategy for power quality problems is an assessment at different locations in the plant that may either be the cause of disturbances, or be sensitive to them. A power quality logging and monitoring system provides the information necessary to analyse the events, and provides data for planning a mitigation strategy. For example, harmonic analysis provides the necessary information to plan what type of filters to apply, and where to place them.

    ProQ 100, along with ProQ View, provides extensive monitoring of power quality events, enabling system performance to be characterised continuously. ProQ View logs a wide range of power quality events, along with direction, with analytics to identify the cause of power quality disturbances. The logging of accurate data helps in quickly and systematically determining root causes, and helps in determining the best solution.


    Power quality monitoring use cases – utilities

    Internal and external disturbances in electricity networks, such as switching, non-linear loads (e.g. SVCs, STATCOMS, FACTS equipment) combined with faults and lightning interference, can often lead to power quality (PQ) events. Harmonic currents drawn from upstream voltage sources by non-linear loads, through the impedance of cables and transformers, create harmonic voltage distortion. Consequently, power quality monitoring in utility networks has been growing in practice, and is at different maturity levels in different geographical markets.

    There is also pressure from customers and regulatory authorities to provide information on the actual power quality level. Developments in enabling technologies (monitoring equipment, communications, data storage and processing) have made it possible to monitor on a large scale, and to record virtually any parameter of interest. The change in the types of loads connected to the network, together with the proliferation of non-conventional, power electronic interface connected generators, puts additional pressure on system operators to monitor and document various aspects of system. The envisaged growth in use of non-conventional types of loads and storage (e.g., electric vehicles) can only exacerbate such problems.

    ProQ 100, along with power quality analysis software ProQ View, enables power quality compliance reports to EN 50160 and ITIC to be generated easily and accurately. It also classifies power quality problems for points of common coupling (PCC) and enables vulnerable points in the network to be identified. It also provides information on reliability indices, e.g. SAFI, SAIDI and CAIDI, which are the indicators of continuity of supply. ProQ View logs a wide range of power quality events, along with direction, with analytics to identify the source of the power quality problems, upstream or downstream.

  • Key points

    • Revenue meter as per IEC 62053-22 Class 0.2S
    • PQ measurements certified to IEC 61000-4-30 class A and instrument to IEC 62586-2
    • Compliance verification with voltage supply standards, e.g. EN 50160
    • Power quality events logging for sag, swell, interruption and rapid voltage change
    • Large intuitive colour graphical display for real time data viewing, vector diagram, wave forms, harmonic spectrum analysis and configuration settings.
    • Comprehensive power quality monitoring and analytics, using ProQ View® software (supplied)
    • Range covers HV3, HV4 and LV4 connections
    • Unbalance including positive, negative and zero sequence easurements
    • Harmonics and inter-harmonics up to 50th order
    • Distortion factors THD, TDD and waveform quality indices e.g. K factor and crest factor
    • Supply continuity indices (SAIFI, SAIDI, CAIDI)
    • Comprehensive logging of instantaneous, energy and power quality parameters (dual loggers)
    • Voltage and current recording for pre- and post- events
    • Built-in web server to access real-time values and powerful analytical capability through ProQ View
    • Error compensation for CT/VT (linear/non-linear) and power transformer
    • Specification
      • Accuracy class: 0.2S
      • Measurement voltage range:  3 x 57.7/100 V….240/415 V (3P4W) | 2 x 100….120 V (3P3W)
      • Auxiliary power supply:
        • Supply type                              Single phase (main APS + redundant APS optional)
        • Supply range                             48-230 V AC/DC, 50 Hz/60 Hz
        • Frequency                                 50/60 Hz ± 5%
      • Current range: 1 A-10 A (field configurable)
      • Mains frequency: 50/60 Hz ± 5%
      • Dimensions (W x H x D): 202 mm x 132 mm x 261 mm
      • Ingress protection: IP 54
      • Pulse input/outputs:
        • Fixed 4 outputs (24-230 V AC/DC @ 100 mA)
        • Configurable block of 4 I/Os (24-230 V AC/DC)
      • Time Synchronisation : Up to 25 seconds (options: SNTP)
      • Communications ports and protocol:
      • Common port for IEC1107 & ANSI
      • RS-232 (DLMS)
      • RS-485 (DLMS or Modbus)
      • Ethernet (DLMS and Modbus simultaneous)
      • One Ethernet over SFP bay (DLMS/Modbus simultaneously, and optional IEC61850)
      • Compliance
        • Power quality - IEC 61000-4-30 Class A Ed. 3, IEC62586-2 Ed. 2(Class-A), IEC 61000-4-7, IEC 61000-2-4, IEC 61000-3-8, IEC61000-4-15, EN50160, IEEE1159-3 (PQDIF)
        • Metering - IEC 62052-11 and IEC62053-22, IEC62053-24, IS14697, IS15959