The CT Series 400 Hz GPU (Ground Power Unit) features a brushless revolving field generator, rubber torsion axle-mounted of rugged galvanized steel construction with fifth wheel steering and powder-coated sheet metal panels chassis (or mounted on truck chassis). The unit is able to provide 400Hz, 115/200 Volt AC, 3 phase, and 28.5V DC for option. It can be used for both military and civilian aircrafts with the latest emission standards. The models are CT-GPU90/120/140/180-PT/PQ (PT model refers to trailer-mounted GPU and PQ model refers to truck-mounted GPU).