Power Load Calculation Book

Complete LV design-load sheet: per-group P30/Q30/S30/I30, simultaneity, average loads, reactive compensation and transformer selection.

System line voltage U (kV) Simultaneity coefficient K∑

Workshop feeder K∑ = 0.9–1.0; LV busbar K∑ = 0.8–0.9.

Active load coeff. α

α ≈ 0.7–0.8 (average / design)

Reactive load coeff. β

β ≈ 0.75–0.85 (average / design)

Target power factor after compensation Annual maximum-load hours Tmax (h/a)

Industrial ≈ 4500–6000 h; residential ≈ 2500–3500 h.

Select transformer rating

Group	Pe (kW)	Kx	cosφ	tanφ	P30 (kW)	Q30 (kvar)	S30 (kVA)	I30 (A)

No load groups added.