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Carelabs

IEEE 1584 · Engineering

Harmonic Study & Analysis - Carelabs Turkey

Carelabs delivers harmonic study and analysis for industrial and commercial facilities across Turkey, measuring total harmonic distortion with a harmonics analyser and modelling system impedance versus frequency to identify resonance risk. Where levels exceed the limits set in TS EN 50160, we recommend mitigation — harmonic filters, relocated power-factor correction capacitance, or higher-pulse-number rectifiers — and verify compliance with TS HD 60364 and EPDK's grid-connection requirements.

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What your instruments are actually telling you

Measuring a distorted waveform with equipment that assumes a sine wave produces a confident, wrong number. Decisions then get made on it, including decisions about cable and device ratings.

What We Deliver

True RMS against average-responding

An average-responding instrument calibrated for a sine wave under-reads distorted current, sometimes substantially. Where cable and device loading has been assessed with one, the installation may be carrying more than the records show.

WHY IT MATTERS

Confident numbers, wrong conclusions

Loading assessments, capacity decisions and cable ratings are frequently based on readings from instruments that cannot measure a distorted waveform correctly. The error is invisible because the instrument gives no indication of it.

  • Reference measurement taken with true RMS instrumentation to a defined method, establishing what the real values are.
  • Installed instrumentation compared against that reference, which quantifies any error in the records the site has been relying on.
  • CT ratio, class and burden verified, since saturation corrupts every measurement and protection decision downstream of it.
  • Protective device measurement behaviour reviewed where nuisance operation has been reported and never explained.
  • Neutral current measured directly, because instruments and calculations that assume balanced load miss triplen summation entirely.
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DELIVERABLES

What you receive

Issued against TS HD 60364 and the İç Tesisler Yönetmeliği requirements, with the measurement method stated.

  1. 1Reference measurements with the full harmonic spectrum at each assessed point
  2. 2Comparison against installed instrumentation, with any reading error quantified
  3. 3CT verification results including ratio, class and burden findings
  4. 4An assessment of protective device measurement behaviour where nuisance operation is reported
  5. 5Corrected loading figures for use in capacity and cable rating decisions
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How the study runs

01

Establish what is relied on

We identify which instruments and records are used for loading and capacity decisions, since those are the numbers that matter if they are wrong.

02

Take reference measurements

True RMS instrumentation to a defined method records actual values and the full spectrum at each assessed point.

03

Compare against installed instruments

Panel meters and monitoring systems are read simultaneously, which quantifies the error rather than asserting that one exists.

04

Verify the CTs

Ratio, class and burden are checked, because a saturating CT corrupts every measurement and protection decision taken from it.

05

Review protection behaviour

Where nuisance operation has been reported, device measurement behaviour under the actual waveform is assessed.

06

Report with corrected figures

Loading values are restated where installed instrumentation was under-reading, so capacity decisions rest on real numbers.

Frequently asked questions

An average-responding instrument calibrated for a sine wave under-reads distorted current, and with heavy electronic load the error can be significant. It matters because loading assessments and cable rating decisions are often taken from exactly those readings, so the installation can be carrying more than any record shows.
It frequently is. Electronic trip units and residual current devices make decisions from a measured waveform, and distortion changes what they measure. The operation is recorded as a nuisance trip, maintenance finds nothing, and the underlying measurement issue is never identified because nothing appears faulty.
Not necessarily. What matters first is knowing the error, because once quantified, existing readings can be interpreted correctly. Replacement is worth considering where the instrument feeds a decision that must be accurate, such as capacity planning or protection, rather than across every panel on the site.
Revenue meters are generally specified to measure energy correctly under distorted conditions, so billing accuracy is usually not the concern. The problem sits with secondary instrumentation used for engineering decisions, which is often average-responding and was never intended to characterise a distorted waveform.

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