IEEE 1584 · Engineering
Harmonic Study & Analysis - Carelabs Saudi Arabia
Carelabs delivers harmonic study and analysis for industrial and commercial facilities across Saudi Arabia, measuring total harmonic distortion with a harmonics analyser and modelling system impedance versus frequency to identify resonance risk. Where levels exceed applicable limits, we recommend mitigation — harmonic filters, relocated power-factor correction capacitance, or higher-pulse-number rectifiers — and verify compliance with SBC 401.
Free ConsultationHeavy process loads and a stiff supply
Rectifiers, electrolysis plant and large induction heating draw current in pulses at a scale that dominates everything else on the busbar. The assessment has to be built around them rather than around general distortion.
What We Deliver
The dominant load characterised
Where one process load produces most of the distortion, the study concentrates on characterising it precisely: its spectrum, its duty cycle and how its emission varies with process load rather than treating it as a constant.
WHY IT MATTERS
One load setting the terms for the site
Where a single process load produces most of the harmonic current, site-wide averages describe nothing useful. The assessment either characterises that load properly or it produces a number with no actionable content.
- Measurement synchronised with process operation, since emission from a rectifier load varies with its duty and a random window may miss the worst case.
- Current distortion referenced to demand at the connection point, because a strong supply can hide a large emission behind low voltage distortion.
- Ambient conditions considered for any mitigation equipment, as filters and reactors carry continuous current and generate heat in an already hot environment.
- Transformer thermal position assessed, since harmonic loading from a dominant process load consumes capacity across the whole installation.
- Resonance checked before any capacitive equipment is recommended, because adding capacitance near a large harmonic source is how amplification begins.
DELIVERABLES
What you receive
Issued against SBC 401 and SASO IEC 60364, with the applicable emission limits and measurement basis stated.
- 1Measured spectrum of the dominant process load across its operating duty
- 2Current distortion at the connection point referenced to demand
- 3Frequency scan identifying resonance and the margin to each point
- 4Comparison of design-side options including phase-shift arrangements against added filtering
- 5Filter duty specification based on measured current and duty cycle rather than nominal values
How the study runs
Understand the process
We establish how the dominant load operates: its duty cycle, how emission varies with process demand, and when the worst case occurs.
Measure in step with it
Recording is aligned with process operation so the measured spectrum reflects the real worst case rather than a convenient sample.
Establish the connection position
Current distortion is assessed against demand at the point of connection, which is where emission limits actually apply.
Model and scan
The network is built in ETAP and a frequency scan locates resonance, which determines what mitigation is safe near a large harmonic source.
Compare design and filtering
Phase-shifting arrangements and added filtering are compared on the measured spectrum, since design-side cancellation is often more robust.
Specify for the duty
Any recommended equipment is sized against measured current and duty cycle, with ambient conditions taken into account explicitly.
Frequently asked questions
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