For sale is a Johnson Electric Coil Co. 12 KVA Electrical Transformer, Serial No. 10969439. Part No.J11839. Made in USA. 12 KVA. 190 to 575 V AC Primary (selectable via multiple input taps). 380 V AC Secondary. 3-Phase. 50 / 60 Hz. operation. 24-1/4 (W) X 16-3/8" (D) X 24-7/8" (H) Overall size.