Power Quality Assessment (site measurement)
Continuous measurement of supply quality over a representative window — typically seven days or longer — capturing voltage sags and swells, interruptions, transients, flicker, unbalance and distortion. Measurement comes before diagnosis: power quality problems are intermittent by nature and a snapshot reading will
What this study establishes.
Class A instrument deployment at the points of common coupling and at affected boards.
Statistical summary against EN 50160 or the applicable supply contract, with 95th-percentile reporting.
Event log of sags, swells, interruptions and transients, each time-stamped and characterised by depth and duration.
ITIC/CBEMA plotting of events against equipment ride-through capability.
Correlation of recorded events against reported equipment trips and production stoppages.
Diagnosis separating utility-side from site-side origin, and a prioritised mitigation route.
What the work covers.
Continuous measurement of supply quality over a representative window — typically seven days or longer — capturing voltage sags and swells, interruptions, transients, flicker, unbalance and distortion. Measurement comes before diagnosis: power quality problems are intermittent by nature and a snapshot reading will miss the event that matters.
Class A instrumentation matters when the result may be contested. Class S is adequate for internal troubleshooting, but a utility or a supplier will challenge non-Class-A data, and the measurement then has to be repeated.
What lands in your inbox.
Class A instrument deployment at the points
Class A instrument deployment at the points of common coupling and at affected boards.
Statistical summary against EN 50160 or the
Statistical summary against EN 50160 or the applicable supply contract, with 95th-percentile reporting.
Event log of sags, swells, interruptions and
Event log of sags, swells, interruptions and transients, each time-stamped and characterised by depth and duration.
ITIC/CBEMA plotting of events against equipment ride-through
ITIC/CBEMA plotting of events against equipment ride-through capability.
Correlation of recorded events against reported equipment
Correlation of recorded events against reported equipment trips and production stoppages.
Diagnosis separating utility-side from site-side origin, and
Diagnosis separating utility-side from site-side origin, and a prioritised mitigation route.
How we run it.
Scope & data capture
We confirm the question the study must answer, agree the measurement or modelling points, and collect what the work depends on: single line diagram identifying candidate measurement points; log of symptoms with dates and times, however informal; safe access for instrument installation at live boards, with ct clamp positions.
Measurement & modelling
Engineers carry out the measurement and modelling on site and in software, under operating conditions representative of the problem rather than a single convenient snapshot.
Analysis against standard
Results are assessed against IEC 61000-4-30, EN 50160, IEEE 1159, with the assessment basis and any measurement uncertainty stated rather than implied.
Report & recommendations
You receive a signed engineering report with findings ranked by consequence, the reasoning behind each conclusion, and mitigation options costed so they can be acted on or deferred deliberately.
Assessed against the published limits.
Common questions.
Typically in one of these situations: unexplained equipment trips, resets or failures with no fault found; disputes with the utility over supply quality that need evidence; before and after any mitigation investment, to prove the change worked. If none of these apply, the study is unlikely to be the right next step and we will say so.
To scope and run the work we need single line diagram identifying candidate measurement points; log of symptoms with dates and times, however informal; safe access for instrument installation at live boards, with ct clamp positions agreed. Where any of it is missing we can establish it on site, which changes the scope rather than blocking the work.
Primarily IEC 61000-4-30, EN 50160, IEEE 1159, IEC 61000-4-7. The applicable framework depends on your connection agreement and jurisdiction, so we confirm which applies before measurement rather than after.
Ready to start the engagement?
Tell us about your site and the problem you are seeing. We come back with a fixed scope, a fixed fee, and a named lead engineer.