... the world have a long-term extension of Insert-type power transformers, its performance has not been fundamentally improved. ... caused by Artiicial lamination, stacked, split iron yoke plug,5-6 working procedure decreasing compared with stacked core ... transformer rated capacity (kVA) 8760,3400 -------- transformer no-load running in one year, load hours (h) 0.05 ----------------- reactive equivalent ...