Screening-level harmonic current emission & PCC voltage distortion — CSA C61000-3-6 / Hydro-Québec C.25-01
Dwg No.THD-001
ScaleNTS
MethodCSA C61000-3-6
Rev—
Screening-level assessment only.This tool performs a simplified, single-frequency-per-order emission and voltage-distortion estimate using the CSA C61000-3-6 harmonic summation law and a linear (X = hX₁) system impedance model. It is not a substitute for the network harmonic impedance data, background distortion measurements, and detailed frequency-scan study that Hydro-Québec requires for an actual compliance submission — and it does not replace the specific per-harmonic limit tables that HQ or the applicable CSA standard provides for your point of connection. Default limit values shown are commonly published representative figures and must be replaced with the actual values issued for your project before this is used for compliance purposes.
1
Project & Point of EvaluationTag, governing standard, PCC voltage, short-circuit capacity
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2
Harmonic Source DevicesNon-linear loads and their current spectra
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3
Operating ConditionGeneral vs. occasional, background distortion
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4
Capacitor Bank / Resonance Check (optional)Power-factor correction capacitors can shift the resonance point
Result — Emission & Distortion Summary
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THDI at PCC
THDI limit (this condition)
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Scc/Sr ratio
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THDU at PCC (estimated)
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THDU compatibility level
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Worst-case harmonic order
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Estimated resonance order
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Harmonic Spectrum vs. Limit
calculated Ih at PCC compared to the limit table
Calculation Ledger
clause-by-clause
Harmonic Current Limit Table (editable)
replace with the actual HQ / CSA table for this project