Northern Airborne Technology VR33-001 User Manual
SM47
VR33 Series
DC Power Converter
INSTALLATION AND OPERATION MANUAL
REV 4.00 Nov 16, 2005
Northern Airborne Technology Ltd.
1925 Kirschner Road
Kelowna BC, Canada
V1Y 4N7
Telephone (250) 763-2232
Facsimile (250) 762-3374
Copyright 2005 by Northern Airborne Technology
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM47 Rev. 4.00 VR33 Series DC Power Converter Manual
Periodically NAT will release manual amendments. In order to maintain the most
accurate and up to date manual these amendments should be carried out immediately
upon receipt and recorded on the following amendment record.
AMENDMENT RECORD
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Note: Revision 4.00 is the first public release of this document
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Insert any Amendment Instruction sheets after this page.
Nov 16, 2005 Page ii
ENG-FORM: 820-0109.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM47 Rev. 4.00 VR33 Series DC Power Converter Manual
Table of Contents
Section Title Page
1 Description
1.1 Introduction 1-1
1.2 General 1-1
1.3 Features 1-1
1.4 Specifications 1-1
1.4.1 Electrical Specifications 1-1
1.4.2 Physical Specifications 1-2
1.4.3 Environmental Specifications 1-2
1.5 Unit Nomenclature 1-2
2 Installation
2.1 Introduction 2-1
2.2 Unpacking and Inspection 2-1
2.3 Installation Procedures 2-1
2.3.1 Cabling and Wiring 2-1
2.3.2 Mechanical Installation 2-1
2.3.3 Post-Installation Checks 2-2
2.4 Continued Airworthiness 2-2
2.5 Installation Drawings 2-2
3 Operation
3.1 Introduction 3-1
3.2 General 3-1
Nov 16, 2005 Page iii
ENG-FORM: 820-0109.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM47 Rev. 4.00 VR33 Series DC Power Converter Manual
Section 1 Description
1.1 Introduction
This manual contains information on the VR33 Series DC Power Converters.
Descriptions and information will be given for the VR33-001 and the VR33-002 models.
Any differences between the two models will be noted. All derivative products will be
covered by manual supplements, which can be obtained from NAT as required.
Information in this section consists of purpose of equipment, features and specifications.
1.2 General
The VR33 is a power conversion device designed to increase the nominal 28 Vdc
aircraft voltage to 33 Vdc using high speed switching DC-DC conversion.
When used in conjunction with the NAT PA250/PA700 Series or high power PA
amplifiers, the additional available voltage provided by the VR33 significantly increases
the available power to the speakers and thus extends the audible range of the system.
1.3 Features
The VR33-001 is used with the PA250-xxx Audio Power Amplifier, and boosts the
output power from 250 to 400 Watts.
The VR33-002 provides two outputs, which makes it ideal for use with the PA700-xxx
Audio Power Amplifier. It boosts the PA700-xxx output power from 700 to 850 Watts.
1.4 Specifications
1.4.1 Electrical Specifications
Input
Input Power VR33-001 140 Watts
Input Power VR33-001 280 Watts
Input Voltage +28.0 Vdc nominal
+21.0 Vdc minimum
+32.0 Vdc maximum
Input Current VR33-001 5.0 Adc + PA250-xxx current (15-20 Adc full load)
VR33-002 10.0 Adc + PA700-xxx current (35 Adc full load)
Nov 16, 2005 Page 1-1
ENG-FORM: 800-0108.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
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