Low PF means your electrical system carries current that does no real work.
PF < 0.5 – Poor (avoid).
PF 0.5–0.7 – Acceptable for residential.
PF > 0.9 – Required for commercial projects.
PF > 0.95 – Boyin standard for downlights >10W.
A supermarket with 1,000 downlights (15W each, PF 0.5 vs 0.95).
Apparent power difference: 30 kVA vs 15.8 kVA.
Transformer and cable costs reduced by ~40% with high PF.
Tip: Check PF at both full load and 20% load (dimmed).
Hot News2026-05-07
2026-04-30
2026-04-23
2026-04-16
2026-04-09
2026-04-02
EN
