Chapter N

Characteristics of particular sources and loads


Typical electrical characteristics of LV/LV 50 Hz transformers

From Electrical Installation Guide
HomeCharacteristics of particular sources and loadsProtection of LV/LV transformersTypical electrical characteristics of LV/LV 50 Hz transformers
3-phase (≤ 80A)
kVA rating 5 6.3 8 10 12.5 16 20 25 31.5 40 50 63 80
No-load losses (W) 100 110 130 150 160 170 270 310 350 350 410 460 520
Full-load losses (W) 250 320 390 500 600 840 800 1180 1240 1530 1650 2150 2540
Short-circuit voltage (%) 4.5 4.5 4.5 5.5 5.5 5.5 5.5 5.5 5 5 4.5 5 5


3-phase (≥ 100A)
kVA rating 100 125 160 200 250 315 400 500 630 800
No-load losses (W) 570 680 680 790 950 1160 1240 1485 1855 2160
Full-load losses (W) 3700 3700 5900 5900 6500 7400 9300 9400 11400 13400
Short-circuit voltage (%) 5.5 4.5 5.5 5 5 4.5 6 6 5.5 5.5


1-phase
kVA rating 8 10 12.5 16 20 25 31.5 40 50 63 80 100 125 160
No-load losses (W) 105 115 120 140 150 175 200 215 265 305 450 450 525 635
Full-load losses (W) 400 530 635 730 865 1065 1200 1400 1900 2000 2450 3950 3950 4335
Short-circuit voltage (%) 5 5 5 4.5 4.5 4.5 4 4 5 5 4.5 5.5 5 5
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