SYSTEM DESCRIPTION AND INSTALLATION MANUAL
HS--600 High Speed Data System
23--20--31
30 May 2002
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Page 3--1
SECTION 3
ELECTRICAL INSTALLATION
1. Overview
A. General
(1) This section gives electrical installation procedures, power distribution, and
interconnect information for the HSU, combiner, and splitter.
(2) Procedures for proper shield, power, and signal grounding are also provided in this
section. In addition, procedures for the various buses are included.
B. Equipment and Materials
(1) See leading particulars table for a list of mating connectors required to do the
electrical installation.
2. Electrical Installation Procedure
A. General
(1) The information necessary to provide the electrical interconnects is contained in the
following paragraphs.
B. Power Requirements
(1) AC Power -- The aircraft ac power inverters must supply single phase 115 V ac
(min 97, max 134 V ac) 400
±
80 Hz sine wave with a maximum total harmonic
distortion of 5%. Under all load conditions, amplitude modulation of the power supply
will not exceed 2% at any frequency. (Percent modulation is defined as one--half of
the peak--to--peak modulation envelope divided by the carrier amplitude and
multiplied by 100.)
(2) DC Power -- The aircraft dc power supply must be 28 V dc (nominal). The normal
minimum and maximum voltages permitted are 20.5 and 32.2 V dc respectively.
(3) Power supply to the HSU -- The voltage level of the power supplied to the HSU is
important in this installation. The potential is the difference between the power pins
and power ground pins at the line replaceable unit (LRU). Excessive voltage drops in
the power wire(s) and power ground wire(s) cause one or more of the following
conditions:
•
The LRU draws additional current from the aircraft supply system.
•
Since the LRU is drawing more current, it produces more heat and more heat
causes a lower LRU MTBF.
(4) The recommended maximum total combined voltage drop (voltage drop of the power
wire[s] plus voltage drop of the power ground wire[s]) is 1.0 V. Voltage drop is a
function of current and resistance (resistance in this case is a function of wire gauge
and wire length). See Figure 3-1 for determining proper wire gauge for LRU power
and power ground wires.
Содержание HS-600
Страница 15: ...CONTENTS ...
Страница 22: ...INTRODUCTION ...
Страница 27: ...SYSTEMS DESCRIPTION AND OPERATION ...
Страница 42: ...MECHANICAL INSTALLATION ...
Страница 52: ...ELECTRICAL INSTALLATION ...
Страница 64: ...INSTALLATION CHECK ...
Страница 69: ...ADJUSTMENT TEST ...
Страница 78: ...FAULT ISOLATION ...
Страница 81: ...MAINTENANCE PRACTICES ...
Страница 86: ...APPENDIX A ...
Страница 97: ...APPENDIX B ...