Crane Aerospace & Electronics Power Solutions 81-084 TRANSFORMER RECTIFIER UNIT TECHNICAL FEATURES • 115 VAC, 3 phase, 400 Hz input • 28 Vdc output • 250A output power • Fan cooled • Passively regulated • Very low current THD (<12%) • 12 pulse rectification • Output current sense (x2) • Overtemperature sensor • Fan underspeed detection • 120A continuous at loss of cooling PERFORMANCE DESCRIPTION Developed to meet RTCA/DO-160 This versatile Transformer Rectifier Unit (TRU) can deliver up to 250 amps of output power and be used on multiple aircraft platforms for many purposes. Application • Aircraft DC Bus power 12.49 inches MAX (317.2 mm) With standard 115 VAC, 3 phase, 400 Hz input, this fan cooled unit has an MTBF of 125,000 hours in a pressurized aircraft protected environment and is currently in use on business aircraft and helicopters. This TRU is one of many that Crane Aerospace & Electronics provides as the world’s leading supplier of TRUs and Auto Transformer Rectifier Units for commercial aircraft. We offer field proven, exceptionally reliable power solutions for both commercial aerospace and military applications. 11.46 inches MAX (286.0 mm) 8.71 inches MAX (221.234 mm) 1.25 ± .50 9.91 inches MAX (251.7 mm) (1.13) 1.05 ± .50 5.84 inches MAX (148.3 mm) 3.99 ± .50 721 ± .50 2.20 ± .50 2X 7.48 ± .50 Crane Aerospace & Electronics Power Solutions - ELDEC 16700 13th Avenue West, Lynnwood, WA 98037 +1.800.464.0261 • [email protected] www.craneae.com/power Page 1 of 2 81-084 TRU - Rev 3, 3/23/15 Crane Aerospace & Electronics Power Solutions 81-084 TRANSFORMER RECTIFIER UNIT PERFORMANCE DATA INPUT Input Voltage: 115 VAC, 3 phase ENVIRONMENTAL Loss of Cooling: 120A, +30°C, 15,000 ft, continuous Input Frequency: 400 Hz Overpressure: RTCA/DO-160D, Section 4, -15,000 ft Input Current: <28.5 Amps Power Factor: >0.95% Temperature Variation: RTCA/DO-160D, Section 5, Category B Efficiency:>87% Humidity: RTCA/DO-160D, Section 6, Category A Current THD: 12% maximum Operational Shock and Crash Safety: RTCA/DO-160D, Section 7, Category B OUTPUT Output Voltage: 28 Vdc (nominal) Output Current: 250 Amps Vibration: RTCA/DO-160C, Section 8, Category S, Curve B for one hour in each of the TRU’s three orthogonal axes Output Ripple: <1.5 Vp-p Overload Rating:* 150% (375 amps) for 5 minutes 200% (500 amps) for 5 seconds 2000 amps for 2 seconds Fungus Resistance: RTCA/DO-160D, Section 13, Category F Audio Frequency Conducted Susceptiblity - Power Inputs: RTCA/DO-160D, Section 18, Category A(CF) * Note on overload ratings: The TRU will meet overload requirements when preconditioned at 200 A at 30 °C sea level. Induced Signal Susceptibility: RTCA/DO-160D, Section 19, Category Z INTERFACE Dimensions: Length: Width: Height: 12.49 inches (317.2 mm) (including terminal block) 9.91 inches (251.7 mm) (including mounting feet) 5.84 inches (148.3 mm) Radio Frequency Susceptibility (HIRF): RTCA/DO-160D, Section 20, Category R Emission of Radio Frequency Energy: RTCA/DO-160D, Section 21, Category L Weight: ≤ 18.5 lbs (8.41 kg) Lightning Indirct Effects: RTCA/DO-160D, Section 22, Category A3G33 Cooling: Internal Fan Operating Temperature: -15°C to +40°C at 15,000 ft -15°C to +70°C at sea level Ground Temperature: -55°C to +85°C MTBF: 122,000 hours in a pressurized aircraft protected environment. Design Life: > 20 years Connections: Signal: D38999/20WC35PN Input: M53452L22-22P Power: Terminal Block: 3/8-24 unf-2A thread stud for positive 5/16-24 unf-2A thread stud for negative All information is believed to be accurate, but no responsibility is assumed for errors. We reserve the right to make changes in products or specifications without notice. Copyright © 2015 Crane Electronics, Inc. All rights reserved. Page 2 of 2