Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 447 DC TRANSFORMER RECTIFIER UNITS TRU 2400-2 Powervamp’s TRU 2400-2 transformer rectifier unit will start and power all known 28V DC aircraft. Silent, environmentally clean, and easy to use, the TRU-2 offers users significant operating benefits. Designed and built to the highest industry standards (MILSTD 704, ISO 6858), it produces the highest quality output signal with minimal AC ripple and is guaranteed to be accepted by all DC aircraft. The 12 pulse rectification technology used ensures a low input total harmonic distortion less than 13% at nominal load, adding to the efficiency of the system. The TRU 2400-2 produces a regulated 28V DC output and can deliver a constant current of 600A with engine starting peaks of up to 2400A. The current limiting feature enables the user to limit the output current to the aircraft and can be accessed and set via the digital display. The user can access the line drop compensation feature via the display menu to increase/decrease the output voltage at the plug within the limits of ISO 6858. The TRU 2400-2 is a compact solid state module built to IP55 protection, designed for internal/external fixed or mobile use. With its weather-resistant, hot-dipped galvanized frame with wheels, the unit can be easily moved by hand over uneven surfaces. Power consumption is reduced by the unique ‘wake/sleep’ feature which powers down the TRU 2400-2 after sensing that there has been no current draw for a pre-set time. The TRU 2400 is available with 50/60Hz or 400Hz input depending on model. Typical power plant:* PT6C-67, Makila, TFE 731, ALF 502, HTF7000, RR Tay, or power plants of a similar specification Features l Low total input harmonic distortion l Digital display l Unique energy-saving sleep mode controlled via the display l System data logger l Indoor/outdoor hangar use l Line drop compensation l External system control (option) l Emergency power off l Aircraft interlock/system interlock override l Input frequency and voltage monitoring l Output current limit feature l Braking system l Input and output cable storage Specifications Output power 16.8kW INPUT Voltage 400V or 208V (AC 3 wire +E) (depending on model) Frequency 50/60Hz or 400Hz (depending on model) Rectification 12 pulse Inrush current N/A Power factor > 0.86 @ nominal load Line current 32A/62A @ nominal load Input harmonics