NEACORP 90KVA Ground Power Units for Aircraft are ruggedly built for military and aviation demand. The system configuration is user friendly and reliable. The Perkins Diesel Turbocharged engine delivers high performance. With a standard output of 115/200 Volt, 3 Ph, 400 Hz, 173 amp @2000 RPM, brushless alternators. For technical support on any of our ground power units contact us http://www.neacorp.com/groundpowerunitsenginepowered/90kvagroundpowerunit2.html