Power Quality Testing Solutions

Detect and diagnose voltage disturbances, harmonics, transients, and instability before they disrupt operations.

Modern electrical networks are more sensitive — and more vulnerable — than ever. From process plants and hospitals to data centres and utilities, poor power quality can trigger equipment trips, overheating, premature asset failure, and costly downtime. Megger’s power quality analysers capture the disturbances that cause these issues: voltage dips and swells, harmonics from non-linear loads, transient events, rapid voltage changes (RVC), flicker, unbalance, and phase-angle anomalies.

Built to IEC61000-4-30 Class A, our analysers deliver trusted, standards-compliant data for troubleshooting, audits, energy studies, and long-term monitoring. With onboard analysis, automated CT recognition, and intelligent configuration checks, Megger gives engineers clear, repeatable evidence to maintain stability and protect critical infrastructure.

Get a quote

Capture the disturbances that actually cause failures

Power issues rarely appear as a simple “voltage problem.” They emerge as short dips when motors start, harmonic distortions from drives, fast transients from switching, unbalance due to uneven loading, or flicker from arc furnaces. Megger analysers measure all major PQ phenomena defined by IEC and IEEE, identifying the root cause — not just the symptom.

IEC61000-4-30 Class A accuracy for audits and compliance

Power quality decisions affect safety, operational continuity, and regulatory reporting. Class A compliance ensures measurements are repeatable between instruments, independent of manufacturer, and legally defensible. Megger analysers follow the exact measurement methods defined in the standard, including RMS calculation windows, aggregation rules, detection thresholds, and event classifications (voltage dips, swells, interruptions, RVC, flicker). No guesswork — just trusted, standards-aligned insight.

Smart configuration that prevents setup errors

Incorrect CT orientation, wiring mistakes, or wrong input selections can invalidate PQ data. Megger eliminates these risks with automated CT recognition, wiring verification, and system-configuration checks. This ensures correct phase rotation, expected line voltage, proper scaling, and error-free event detection — even for non-expert users. Ideal for high-pressure environments like industrial shutdowns and utility investigations.

Onboard analysis for immediate decision-making

Not every job allows time for PC downloads. Megger analysers offer full onboard review of waveforms, trends, phase angles, RMS profiles, and event logs — making it possible to diagnose issues on site. Engineers can validate flicker severity, identify harmonic orders, review transient captures, or assess unbalance without leaving the field, accelerating root-cause analysis and reducing repeat visits.

Frequently asked questions

What types of power issues can Megger analysers detect?

Megger analysers detect voltage sags and swells, interruptions, rapid voltage changes (RVC), harmonics, interharmonics, flicker, transients (low-frequency and high-speed), unbalance, phase-angle anomalies, and frequency variations — giving a full picture of network stability.

Are the analysers suitable for both temporary and permanent monitoring?

Yes. Megger instruments can be deployed for portable troubleshooting, short-term energy studies, or long-term Class A monitoring. They install quickly for field work and can also be permanently mounted for ongoing compliance, utility investigations, or facility-wide PQ programmes.

Can I analyse data directly on the device?

Yes. Onboard analysis allows you to review waveforms, trends, event lists, and harmonics without a PC. This supports faster diagnostics and real-time decision-making when you need immediate insight.

Find the right power quality analyser

Power disturbances can remain hidden until they cause real damage. Evaluate your network with Megger’s Class A power quality analysers and capture the evidence needed for safe, stable, and efficient operation.