MIL-PRF-21480B
CONTENTS
PARAGRAPH
PAGE
6.6.3.1
Vibration test fixture ............................................................................................. 39
6.6.3.2
Vibration spectrum exposure level and duration .................................................. 39
6.6.4
Shock..................................................................................................................... 40
6.7
Packaging .............................................................................................................. 40
6.8
Definitions............................................................................................................. 40
6.8.1
Constant speed operation ...................................................................................... 40
6.8.2
Control switch ....................................................................................................... 40
6.8.3
Crest factor ............................................................................................................ 41
6.8.4
Current transformer............................................................................................... 41
6.8.5
Efficiency .............................................................................................................. 41
6.8.6
Faults..................................................................................................................... 41
6.8.7
Generator speed range........................................................................................... 42
6.8.8
Generator system (channel) .................................................................................. 42
6.8.9
Generator system component................................................................................ 42
6.8.10
Generator voltage rating ....................................................................................... 42
6.8.11
Integral control power ........................................................................................... 42
6.8.12
Phase current ......................................................................................................... 42
6.8.13
Phase load unbalance ............................................................................................ 42
6.8.14
Phase voltage ........................................................................................................ 42
6.8.15
Phase voltage unbalance ....................................................................................... 42
6.8.16
Point of regulation (POR) ..................................................................................... 42
6.8.17
Slash rating............................................................................................................ 43
6.8.18
Voltage modulation............................................................................................... 43
6.8.19
Waveform distortion ............................................................................................. 43
6.9
Subject term (key word) listing............................................................................. 43
6.10
Changes from previous issue ................................................................................ 43
6.11
Specification sheet requirements .......................................................................... 43
TABLE
I.
Inspection schedules (qualification and conformance) ..................................................... 44
II.
Electrical performance test conditions (see 4.5.3.1b) ....................................................... 46
III.
Phase unbalance test conditions (see 4.5.3.1. and 4.5.8) .................................................. 47
IV.
Test schedule for generator package attitude/duration (see 4.5.15.a) ............................... 48
V.
Jet aircraft vibration exposure(see 4.5.23.2.2.a and 4.5.23.2.2.c)..................................... 49
VI.
Helicopter vibration exposure (see 4.5.23.2.2.c) .............................................................. 50
VII.
Endurance schedule for air cooled generator systems (see .4.5.14.a and 4.5.28.1) .......... 52
VIII.
Endurance schedule for liquid cooled generator systems (see 4.5.28.2) .......................... 53
IX
Specification sheet requirements (see 6.11)...................................................................... 54
vii
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business