MRC - 81-084-01_March_2015 - Crane Aerospace & Electronics

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
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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.
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