Another mugshot of the Kanpur WAG-7 # 27650. The “STC fitted” notice on the buffer beam refers the replacement of the troublesome and mechanically intricate Arno converter with an even more intricate IGBT based Static (but with no moving parts) Inverter. This device converts the single phase AC supply derived from the OHE to three phase fixed frequency supply that can drive the equipment motors like air compressors, traction motor blowers etc. Nagpur Jn., 2004-05-06. By Apurva (iti@vsnl.com).