This specification describes the MAK GPU Model 90 KVA AC Towable trailer mounted, designed to service 400 Hz AC Electrical systems on civil or military aircraft.
Mechanically coupled engine and alternator are mounted on the base frame. The base frame with engine and alternator coupled is mounted on the frame through Anti Vibration Mounts, designed to take care of the weight and vibrations. Accessories like silencer, hot air duct etc. are installed at convenient locations on the base frame. Power module and control panels are suitably positioned and mounted on the frame itself. The engine, its accessories, alternator and control panels are protected by metal sheet canopy with suitable doors for accessibility. By virtue of its design, the arrangement also provides stowage space for output cables.
90 KVA, 115/200 V, 3 phase, 400 Hz, 0.8 PF.
3. ELECTRICAL PERFORMANCE
The design and the electrical characteristics of the unit comply with BS 2G 219/ISO 6858.
4. OPERATING ENVIRONMENT
The GPU rating is continuous, and the full output is available at ambient temperatures up to 50°C and elevations up to 1000 m above sea level.
Engine used will be Cummins / Equivalent with suitable capacity to deliver 90 KVA at 0.8 PF. The engine comes complete with all necessary accessories, including the following.
Engine starting system
Heavy duty dry paper element air filter
Exhaust system and silencer
Electronic speed governor