Power Quality Measurement Systems — pqExcel Solutions LLP

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Power Quality Measurement Systems

High-accuracy Class A measurement to identify electrical disturbances, ensure compliance, and support engineering decisions — from field to dashboard.

Understanding the difference

Energy Monitoring System vs Power Quality Monitoring System — what's the difference?

Energy Management Systems and Power Quality Measurement Systems are often confused — but they serve fundamentally different purposes. An EMS uses multifunction meters to track energy consumption and utility usage. A PQMS uses high-accuracy Class A analysers to capture electrical disturbances, harmonic content, and power quality events at a deeper level of detail.

If your objective is energy monitoring and consumption tracking, an EMS is the right solution. If your objective is identifying power quality disturbances, diagnosing electrical system problems, or verifying compliance with IEEE 519 and EN50160, a PQMS is required.

Not sure which you need? Many facilities benefit from both — an EMS for energy management and a PQMS for power quality monitoring and compliance. pqExcel can assess your requirements and recommend the right combination.

EMS vs PQMS comparison — measurement type, harmonic analysis, event recording, compliance, application, and data insight
What we deliver

Complete power quality visibility — from measurement to insight

pqExcel designs and implements Power Quality Measurement Systems that provide complete visibility into your electrical network's performance. Our solutions use high-accuracy, Class A measurement devices combined with structured data acquisition and analysis software — capturing the full picture of your electrical system behavior.

We handle end-to-end implementation: device selection and placement, communication network design, software setup, and post-installation reporting — ensuring your PQMS delivers accurate, actionable data from day one.

Voltage parameters

RMS voltage, voltage unbalance, sags, swells, and transients

Current parameters

RMS current, current unbalance, neutral current, and peak demand

Power & energy

Active, reactive, apparent power, power factor, and energy consumption

Harmonic analysis

THD, individual harmonics up to 63rd order, harmonic spectrum analysis

Power quality events

Voltage events, waveform capture, disturbance recording and logging

Frequency

System frequency monitoring and deviation recording

System architecture

End-to-end PQMS implementation

pqExcel implements PQMS across four layers — from field-level measurement devices to software dashboards — ensuring accurate, reliable data flow throughout the system.

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Field device layer

  • Class A power quality analysers
  • Current transformers (CTs) and voltage transformers (VTs)
  • Installed at incomer, feeder, and critical load points
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Network layer

  • Industrial Ethernet switches
  • Modbus TCP/IP communication
  • Data acquisition gateways for protocol conversion
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Data management

  • Central data server with historical database
  • Power quality analysis software
  • Aggregated data storage and event logging
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Visualisation & reporting

  • Real-time power quality dashboards
  • Harmonic spectrum and waveform analysis
  • Automated compliance and analysis reports
Modern Power Quality Measurement System architecture — Measurement, Communication, Analysis, Visualisation flow
Measurement capability

What our PQMS measures

Our systems capture a comprehensive set of power quality and electrical parameters — providing the depth of data needed for accurate engineering analysis and compliance verification.

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Harmonics

THD voltage and current, TDD, individual harmonics up to 63rd order, harmonic spectrum analysis

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Voltage quality

Sags, swells, interruptions, voltage unbalance, and transient events

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Power factor

True power factor, displacement power factor, and reactive power analysis

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Waveform capture

Real-time waveform recording and event-triggered disturbance capture

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Flicker & unbalance

Voltage flicker measurement, three-phase unbalance, and neutral current analysis

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Compliance parameters

Parameters aligned with IEEE 519, EN50160, and IEC 61000 standards

Compliance verification

Our PQMS solutions are configured to capture and report parameters aligned with international power quality standards — providing the data needed for compliance verification and regulatory reporting.

We generate structured compliance reports with measured data, analysis, and recommendations — suitable for regulatory submission, internal audit, and engineering decision-making.

IEEE 519 EN50160 IEC 61000 IS 13234
Applications

Where PQMS delivers value

Power quality measurement systems serve a wide range of engineering, compliance, and operational objectives across industrial and commercial facilities.

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Compliance verification

Verify compliance with IEEE 519 harmonic limits and EN50160 voltage quality standards — providing documented evidence for utility, regulatory, or internal audit requirements.

IEEE 519 / EN50160
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Power quality baseline study

Establish a power quality baseline for your facility — capturing existing harmonic levels, voltage events, and disturbances before system changes or equipment additions.

Baseline & benchmarking
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Harmonic distortion analysis

Identify harmonic sources, quantify distortion levels, and evaluate the impact on electrical system performance — forming the basis for AHF or passive filter design.

Harmonic studies
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Equipment protection & diagnostics

Identify voltage sags, transients, and harmonic-related stresses that cause premature equipment failure — enabling targeted corrective action and improved equipment reliability.

Equipment reliability
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Pre and post mitigation measurement

Measure power quality parameters before and after installation of AHF, SVG, or APFC systems — validating the performance of mitigation solutions against design targets.

Mitigation validation
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Energy audit support

Provide power quality data as part of a broader energy audit — identifying power factor issues, harmonic losses, and reactive power charges that contribute to energy inefficiency.

Energy audit
What you gain

Business outcomes from PQMS implementation

Accurate measurement is the foundation for every engineering decision — and every compliance commitment.

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Complete electrical visibility

Detailed, accurate measurement of all power quality parameters — giving engineers the data needed for informed decisions and accurate root cause analysis.

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Compliance confidence

Documented measurement data aligned with IEEE 519, EN50160, and IEC 61000 — ready for regulatory submission, utility requirements, and internal audit.

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Accurate harmonic assessment

Precise harmonic spectrum data — identifying sources, quantifying distortion, and providing the engineering basis for mitigation system design.

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Improved equipment reliability

Early identification of voltage events and harmonic stresses that cause equipment damage — enabling targeted intervention before failures occur.

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Data-driven engineering decisions

Measurement-validated recommendations — ensuring every mitigation or system improvement is based on actual site data rather than assumptions.

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Structured reporting

Clear, professional reports with measurement data, analysis, compliance assessment, and engineering recommendations — suitable for management and technical review.

Want to know the true state of your power quality?

Talk to our engineers — we'll assess your facility and recommend the right measurement approach.

Discuss PQMS requirements Schedule a power quality audit