Unitron UDC-420M 28V DC Aircraft Rectifier (GPU)

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Unitron GPU Distributor

The new and reliable way to power your aircraft is the Unitron UDC-420M. It is a 28V DC rectifier with 425 amps continuous and 1600 amps max for use in the hangar or ramp environment. This unit operates on 3 phase input voltage (50 hz or 60 hz).

Highlights and Benefits

  • Digital touchscreen display
  • Over voltage protection
  • Under voltage protection
  • Voltage regulation to 28.5V DC +/- 0.5 V at all times
  • Output amperage can be limited to as low as 150 amps - fully adjustable
  • Line drop compensation - accounts for voltage drop in supply cable
  • Only unit to meet 18" fire code regulations
  • Half the weight of competitors

Standard Features

  • P55
  • Certified to UL 1012
  • Indoor/Outdoor (Hangar/Ramp)
  • Use Automatic Input Line Monitoring
  • 8000 Event Log / Diagnostics
  • TCP/IP/Ethernet Interface (Modbus)
  • 10% Power Regulation
  • Internal Communication Ports - USB, RJ45 (Ethernet), RS485 (Modbus), & RS232
  • External Communication Ports - RJ45 (Ethernet) & USB
  • Emergency Power "OFF" Switch
  • 18-Inch Hazard Area Clearance
  • Voltage and Current Monitoring
  • Elapsed Time Meter Access
  • Front Panel Voltage Adjust
  • Front Panel Summary Fault Indicators
  • Input & Output Cable handle
  • Input High Voltage Transient Protection
  • Output Current Limit Adjust from 150 to full rated current
  • Multi Language (Romanization) Display - English, French, German, Italian, Portuguese, Russian and Spanish, Others - Specify

Input

  • Voltage: 208-240V and 380-480V, +/- 10%, 3 or 4 wire plus ground (Specify manual tap position at time of order)
  • Frequency: 50 - 60 Hz +/- 10%
  • Phase Rotation: Any
  • Protection: Over/undervoltage, loss of phase, overcurrent, short circuit. Voltage transient protection IAW IEEE C62.41.1, Location Cat. B/C
  • Inrush Current: No greater than 100% of full load current

Output

  • Full Rated Load: 425 amps continuous
  • Engine Start Capacity (10% duty cycle): Adjustable up to 1600 amps for 35 seconds or 2000 amps for 30 seconds
  • Overload (10% duty cycle): 600 amps for 1 hour 1000 amps for 1 minute
  • Voltage: 28 VDC, 2 wire, grounded negative
  • Voltage Regulation
    • 100% continuous rated load and +/-10% input voltage ; +/- 0.5%
    • No load to rated load with nominal input voltage; AW ISO 6858 and MIL-STD-704F
    • Overload with nominal input voltage; See start mode curves
  • Voltage Adjust: 28 VDC +/- 10%
  • Current Limit Adjust: 150A to full rated current
  • Protection: Overload, short circuit, over voltage and safety disconnect
  • Power Regulation: 10%

Environmental

  • Acoustical Noise: 65 dBA maximum at 5 feet (1.5m)
  • Temperature Range: -40 degrees C to +55 degrees C
  • EMI/RFI: Compatible with aircraft systems
  • Relative Humidity: 10 - 95%, Non-Condensing
  • Ingress of Water: Type 3RX, IP55

Mechanical Specs

  • Dimensions: See image on listing.
  • Weight: 340 lbs (154kg)
  • Enclosure: NEMA 3RX Corrosion Resistant
  • Cooling: Forced Convection

Standards

  • ISO 461-1/2 - Aircraft - Connectors for Ground Electrical Supplies
  • ISO 1540 - Characteristics of aircraft electrical system
  • ISO 6858 - Aircraft ground support electrical supplies
  • MIL-STD-704F - Aircraft electric power characteristics
  • MIL-STD-1472 - Human Engineering Design Criteria

Add-On Top Cable Rack Options Available for Longer Cable Lengths

  • CR 1-12 (12" cable rack) - 180' max (option) of combined cable
  • CR 1-9 (9" cable rack) - 120' max (option) of combined cable
  • Cable handle (standard in unit) 120' of combined cable
Alternate Models
400Alternative PN
600Alternative PN
General Information
Part #UDC-420M
ManufacturerUnitron
Warranty
Details3 Year Limited Warranty - View Details
Shipping Information
Freight NMFC62900
Schedule B8504409540
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