Transformer, power, 100/130/160-MVA,ONAN/ONAF/ONAF or ONAN/OFAF/OFAF, 3-phase, 230-kV/138-kV grounded-wye primary, 36-kV grounded-wye secondary/13.1/4.367-kV delta tertiary, with load tap changer/buried tertiary, with load tap changer, 55C rise, without oil, and various optional spare items.