ABB’s scope of supply for the orders received includes a 700 megavolt-ampere (MVA), 345 kilovolt (kV) power transformer, two 100 MVA, 141 kV power transformers and three 500 kV single phase units. The ...

Fig. 1 shows a transformer in a Wye configuration. A three-phase Delta is a 240 VAC feed with one phase center-tapped as shown in Fig. 2 to provide two 120 VAC feeds and neutral for single-phase loads ...

I shut down and locked out the transformer, and then opened the case. Sure enough, I was reading 460V on the primary side. However, it was tapped for 480V. I changed the three taps to the 460V lugs, ...