Foretec Electric India Private Limited

Power Quality & Harmonics Waveform Demonstrator

Interactive teaching scope — 50 Hz · IS / IEC / IEEE & EN 50160 referenced. Live waveforms, harmonics, sequence, notching, sags, swells and real‑world PQ events with a Janitza UMG Series style readout.

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LIVE SCOPE Pure 50 Hz · Va Vrms · THDv · f

0 ms10 ms20 ms30 ms40 ms

What you will explore

Four teaching modules, each cycling through classroom-ready scenes.

Module 1 — Harmonics & Sequence

Individual harmonics (3rd, 5th, 7th, 11th, 13th …) added live over the fundamental. THD, harmonic spectrum bars and positive / negative / zero sequence readouts update as you drag.

Module 2 — PQ Events @ 11 kV (MV)

Voltage sags, swells, short interruptions, rapid voltage changes and MV transients on the 11 kV bus — each event compared to EN 50160 style bands.

Module 3 — Sequence & Real-World Effects

Unbalance, phase loss, motor de-rating, neutral current build-up and their symmetrical-component signatures — live phasor rotation.

Module 4 — Converter & Even-Order Harmonics

VFD front-ends, notching, DC-offset, half-wave loads and even harmonics. See where each converter topology shows up in the waveform and spectrum.

Standards referenced in the demonstrator

Only the standards actually used inside the tool — PQ measurement, harmonic and event limits.

Voltage characteristics & PQ events

EN 50160 — Voltage characteristics of public LV / MV networks (sags, swells, interruptions, RVC, unbalance)
IS 17036 — Voltage characteristics of electricity supplied by public distribution networks (Indian equivalent)
IS / IEC 61000-4-30 — Class A power-quality measurement method and aggregation intervals (200 ms, 3 s, 10 min, 2 h)

Harmonics & flicker

IEEE 519 (current revision) — System-level (PCC) voltage & current distortion limits, TDD referenced to demand current
IEC 61000-4-7 — Harmonic and inter-harmonic measurement method
IEC 61000-4-15 — Flicker measurement (Pst, Plt)
IEC 61000-3-2 / 3-12 — Equipment harmonic emission limits (≤ 16 A / > 16 A per phase)