MIL-PRF-21480B
CONTENTS
PARAGRAPH
PAGE
3.5.6
Simultaneous load and speed transients................................................................ 15
3.5.7
Protective functions (abnormal power and fault conditions) ................................ 15
3.5.7.1
False trips .............................................................................................................. 15
3.5.7.2
Overvoltage protection.......................................................................................... 15
3.5.7.3
Undervoltage protection........................................................................................ 15
3.5.7.4
Frequency protection ............................................................................................ 15
3.5.7.5
Overcurrent protection (short circuit AC current limit)........................................ 16
3.5.7.6
Feeder fault ........................................................................................................... 16
3.5.7.7
Anti-cycling .......................................................................................................... 16
3.5.7.8
Bus fault isolation ................................................................................................. 17
3.5.7.9
Waveform protection (extraneous AC distortion and DC content) ...................... 17
3.5.7.10
Arc fault power feeder protection ......................................................................... 17
3.5.8
Electromagnetic compatibility .............................................................................. 17
3.5.9
Paralleling ............................................................................................................. 17
3.5.10
Generator output characteristics ........................................................................... 17
3.6
Interchangeability ................................................................................................. 17
3.7
Mechanical connections, fasteners, inserts, and retaining hardware .................... 17
3.8
Seals, coatings and sealant compounds ................................................................ 17
3.9
Endurance (durability) .......................................................................................... 17
3.10
Reliability.............................................................................................................. 18
3.11
Maintainability ...................................................................................................... 18
3.12
Workmanship ........................................................................................................ 18
4.
VERIFICATION............................................................................................................... 18
4.1
Classification of inspections ................................................................................. 18
4.2
Qualification inspection ........................................................................................ 18
4.2.1
Qualification sample submittal ............................................................................. 18
4.2.2
Qualification inspections and tests........................................................................ 18
4.2.3
Qualification retention .......................................................................................... 19
4.2.4
Rejection, resubmittal, and retest .......................................................................... 19
4.3
Conformance inspection ....................................................................................... 19
4.4
Standard conditions............................................................................................... 20
4.4.1
Tolerances for controlled test environment .......................................................... 20
4.4.2
Test sample ........................................................................................................... 20
4.4.3
Loading of the AC power source .......................................................................... 20
4.4.4
Loading of the DC power source .......................................................................... 20
4.4.5
Voltage and frequency measurements .................................................................. 21
4.4.6
Power factor .......................................................................................................... 21
4.4.7
Component mounting............................................................................................ 21
4.4.8
Thermal ................................................................................................................. 21
4.4.8.1
Thermal isolation .................................................................................................. 21
4.4.8.2
Warm-up and temperature stabilization ................................................................ 21
iv
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business