MIL-STD-704F
w/CHANGE 1
iv
CONTENTS
PARAGRAPH PAGE
3.31 Voltage modulation ................................................................................................ 6
3.32 Voltage phase difference ........................................................................................ 6
3.33 Voltage unbalance .................................................................................................. 6
4. GENERAL REQUIREMENTS ......................................................................................... 6
4.1 Aircraft electric power system requirements ......................................................... 6
4.1.1 Aircraft electric power system performance .......................................................... 6
4.1.2 Electric power source characteristics ..................................................................... 6
4.1.3 Protective devices .................................................................................................. 7
4.2 Aircraft utilization equipment requirements .......................................................... 7
4.2.1 Power compatibility ............................................................................................... 7
4.2.2 Operation ................................................................................................................ 7
4.2.2.1 Normal operation ................................................................................................... 7
4.2.2.2 Abnormal operation ............................................................................................... 7
4.2.2.3 Transfer operation .................................................................................................. 7
4.2.2.4 Emergency operation ............................................................................................. 7
4.2.2.5 Starting operation ................................................................................................... 7
4.2.3 Power failure .......................................................................................................... 8
4.2.4 AC power utilization .............................................................................................. 8
4.3 External power source requirement ....................................................................... 8
4.4 Test requirements ................................................................................................... 8
5. DETAILED REQUIREMENTS ........................................................................................ 8
5.1 Transfer operation characteristics .......................................................................... 8
5.2 AC power characteristics ....................................................................................... 8
5.2.1 Type system ........................................................................................................... 8
5.2.2 Phase sequence ....................................................................................................... 9
5.2.3 Normal operation ................................................................................................... 9
5.2.4 Abnormal operation ............................................................................................... 9
5.2.5 Emergency operation ............................................................................................. 9
5.3 DC power characteristics ....................................................................................... 9
5.3.1 Type system ........................................................................................................... 9
5.3.2 28 volts DC system ................................................................................................ 9
5.3.2.1 Normal operation ................................................................................................... 9
5.3.2.2 Abnormal operation ............................................................................................. 10
5.3.2.3 Emergency operation ........................................................................................... 10
5.3.2.4 Electric starting .................................................................................................... 10
5.3.3 270 volts DC system ............................................................................................ 10
5.3.3.1 Normal operation ................................................................................................. 10
5.3.3.2 Abnormal operation ............................................................................................. 10
5.3.3.3 Emergency operation ........................................................................................... 10
5.4 Load characteristics ............................................................................................. 10
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