MIL-STD-704B Aircraft Electric Power Characteristics Standard Manual PDF (EN)

Downloaded from https://www.everyspec.com MIL-STD-704B 17 November 1975 . SUPERSESSION DATA (SEE 6.6) MILITARY STANDARD AIRCRAFT ELECTRIC POWER CHARACTERISTICS IFS.C MISC I

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Downloaded from https://www.everyspec.com DEPARTMENT OF DEFENBE WuhlDgf.oD, DC 20301 AmCBAFT ELECTRIC POWER CHARACTERISTICS 1. This MDltary staDdard is approved. for use by all Departments and Agencies of 1he Department of Defense. 2. Recommended correCUoD8, addltloua, or deletlona should be addressed. to the Commanding Officer, Naval Air EDgIneerlDg Center, ESSD (Code 93), Lak8hlD'st, N.J. 08733. . II

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Downloaded from https://www.everyspec.com JIIL-STD-7MB CONTENTS Paragraph . . . . . . . · ..... · . . ... · . . . 1 1.1 1.2 2 3 3.2 3.3 3.3.1 3.4 3.5 3.5.1 3.6 3.6.1 3.6.2 3.7 3.8 3.9 3.10 3.10.1 3.11 3.11.1 3.11.2 3.11.2.1 3.11.3 3.11.4 3.12 3.13 3. ]4 3.15 3.15.1 3.16 3.17 3.18 3.19 3.20 3.21 GENERAL Scope . . . Purpose . . . . . . . . . . REFERENCED OOCUMENTS ... DEFINITIONS AC power characteristics AC voltage .. . ..... . . ... 1 1 1 1 2 · .. 2 Nominal AC voltage Crest factor • • . • . . . . . . . . . . . . , · .. 2 2 · . . 2 2 2 3 3 3 · ... 3 3 · . 3 · .. 3 · .. 3 · .. 4 Frequency drift . . . . . . . 4 Frequency drift rate Frequency modulation Frequency transient · .

Overvoltage and undervoltage · .... Ripple amplltude · ... steady state. · . UtUlzation equipment · .. 2 DC power characteristics . . . . Nomtnal dc voltage Distortion • • • • • . . ..... Distortion factor • . . . . . . . . ...... Distortion spectrum. .. . .. Electrical power characteristics ... Electric power system · .... Electromagnetic compatibUlty . . . .. Emergency mode • • • • • • · ... Emergency power characteristics · . . Frequency Nominal frequency • · ... 4 · . . . · . . " " · .. " . . . . . " .. " 6 UtUtzatlon equipment termlnal. .' ..... 6 Voltage phase difference · . . 6 Voltage surge 6 · . Voltage spike 6 Voltage unbalance 6 · .". Reference ground . . . · ..

6 Power sensltl vlty · . . . . . . . 6 In

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Downloaded from https://www.everyspec.com MIL-STD-704B CONTENTS Paragraph Page 4 GENERAL REQUIREMENTS 6 4.1 System equipment compatlbUlty • • • . • • • • • • • • • • • 6 4.2 Power Interruption 6 4.3 Conforma.nce tests 6 5 DETAIL REQUIREMENTS 6 5.1 AC power characterlstics 6 5.1.1 steady state • . . . . . . . . . . . . . . • . . . . . . • • . . • . 6 5.1.1.1 AC voltage magnitude 6 ., 5.1.1.2 .' • . . . . . . • • ., 5.1.1.3 Voltage phase difference. • • • • . . • • • • • • • . . • • • • ., 5.1.1.4 Puse sequence. . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.1.5 AC waveform distortion 7 ., 5.1.1.6 Amplitude modulation. • • • • • • . • • • . • • • • • • • .

• • ., 5.1.1.7 Sy'stem free) uency ., 5.1.1.8 Frequency modulation ., 5.1.1.9 Frequency drlft. . . . . . . . . . . . . . . . • . . . . . . . . . 5.1.2 Transient ..•.•......................... 7 5.1.2.1 Voltage surge . . . . . . ... ". . . . . . . . . . . . . . . . .•. 7 5.1.2.2 Voltage spike • • . • . • • • • . • • • • • • • . • • • • . . . . • 8 5.1.3 Frequency transient limits (frequency surge) • • • ... 8 5.1.4 Overvoltage and undervoltage 8 5.1.5 Out-of-tolerance free)uency (over- and under- frequency) . . . . . . . . . . • . . . . • • • . . . . • . . . . . 8 5.2 00 power cbaracterlstlcs 8 5.2.1 steady state • • • . • . • . . . • • . . . • . • • . . . . . . . • .

8 5.2.1.1 J>C voltage magnitude 8 5.2.1.2 DC distortion . . . . . . . . . . . . . . . . . . . . . . . . . . • 9 5.2.2 Transient .......•.......•.•......... _ ..• 9 5.2.2.1 Voltage surge .. . . . . • . . . . . . . . . • . • . • . . • . 9 5.2.2.2 Voltage spike • • • . . . . . . . . . . . . . • '9 5.2.3 Overvoltage and undervoltage 9 5.3 Ground support power cbaracterlstlcs. 9 5.3.1 AC voltage .•.•.........•.....••••...... 9 5.3.1.1 AC voltage magnitude 9 5.4 System operation of utlllzation equipment 9 5.4.1 Power types . . . . . . . ... . . . . . . . . . • . • • • . . . . • 10 Iv

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