Падение напряжения адресных LED 24В

Расчет кабеля и точек подачи питания для LED-фасада.

Электрическая модель

I=P/V; R=2ρL/A; ΔV=IR; cable loss=I²R. The calculation must include positive and return conductors [S2].

Расчетный пример

Example assumption: 10m × 19.2W/m at 24V = 192W and 8A. A 15m one-way 2.5mm² copper feeder gives 1.68V calculated drop. Two shorter 4A branches reduce the calculated drop to 0.56V each. Verify with approved products and full-load measurements.

Ограничения и безопасность

• No universal allowable percentage applies.
• Do not parallel different supplies without an approved design.
• Fuse and label every injection branch.
• Technical reviewer: 待确认.

Sources

1. LIKELIGHT product review
2. Infineon application note
3. MEAN WELL FAQ
4. MEAN WELL installation manual

Author: LikeLight Tom, Operations. Evidence reviewed August 21, 2026.