Harmonic Analysis IEC 61000-3 series
Harmonic assessment under the IEC framework, which allocates emission limits to individual installations based on their agreed power relative to the supply capacity — a different philosophy from IEEE 519's system-level distortion cap, and the applicable one across most of Europe, the GCC and Asia.
What this study establishes.
Emission assessment against IEC 61000-3-2 or 3-12 for equipment-level limits, as applicable by current rating.
Installation-level emission allocation per IEC 61000-3-6 for MV and HV connections.
Comparison of measured emission against the allocated share of the global contribution.
Compatibility level check against IEC 61000-2-4 for the site's electromagnetic environment class.
Summation treatment across multiple distorting loads per the IEC summation exponents.
Mitigation recommendation sized against the allocated emission budget rather than a blanket target.
What the work covers.
Harmonic assessment under the IEC framework, which allocates emission limits to individual installations based on their agreed power relative to the supply capacity — a different philosophy from IEEE 519's system-level distortion cap, and the applicable one across most of Europe, the GCC and Asia.
IEEE 519 and IEC 61000-3-6 can give different verdicts on the same installation because they allocate responsibility differently. The applicable framework follows the connection agreement and the jurisdiction, and it should be confirmed before measurement rather than after.
What lands in your inbox.
Emission assessment against IEC 61000-3-2 or 3-12
Emission assessment against IEC 61000-3-2 or 3-12 for equipment-level limits, as applicable by current rating.
Installation-level emission allocation per IEC 61000-3-6 for
Installation-level emission allocation per IEC 61000-3-6 for MV and HV connections.
Comparison of measured emission against the allocated
Comparison of measured emission against the allocated share of the global contribution.
Compatibility level check against IEC 61000-2-4 for
Compatibility level check against IEC 61000-2-4 for the site's electromagnetic environment class.
Summation treatment across multiple distorting loads per
Summation treatment across multiple distorting loads per the IEC summation exponents.
Mitigation recommendation sized against the allocated emission
Mitigation recommendation sized against the allocated emission budget rather than a blanket target.
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: agreed supply capacity and the short-circuit power at the connection point; equipment rated currents for emission classification; measured spectra under representative operating conditions.
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 61000-3-2, IEC 61000-3-12, IEC 61000-3-6, 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: connection in a jurisdiction that applies the iec framework rather than ieee 519; equipment compliance evidence required for ce or local conformity; utility has allocated an emission budget that must be demonstrated. 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 agreed supply capacity and the short-circuit power at the connection point; equipment rated currents for emission classification; measured spectra under representative operating conditions. Where any of it is missing we can establish it on site, which changes the scope rather than blocking the work.
Primarily IEC 61000-3-2, IEC 61000-3-12, IEC 61000-3-6, IEC 61000-2-4. 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.