The performance of silicon and amorphous steel core, distribution transformers at ambient and cryogenic temperatures
Four, single phase, 50 Hz, l1/0.23kV pole mount distribution transformers were purchased from a manufacturer. The transformers were fitted with either silicon or amorphous steel cores. The transformer tanks were filled with either standard transformer oil or liquid nitrogen. Each transformer was subjected to a capacitance and dissipation factor test to determine the integrity of the insulation systems. Open circuit and short circuit tests were then undertaken to show the reduction of core losses due to the use of amorphous steel over silicon steel, and the effect of immersion of the entire unit in liquid nitrogen.