MIL-STD-1399-300 Electric Power, Alternating CurrentThis military standard section establishes electrical interface characteristics for shipboard equipment utilizing AC electric power to ensure compatibility between user equipment and the electric power system. Characteristics of the electric power system are defined and tolerances are established, as well as requirements and test methods for ensuring compatibility of shipboard user equipment with the power system. The policies and procedures established by MIL-STD-1399 are mandatory. This section and the basic standard are to be viewed as an integral single document for use in the design and testing of electric power systems and user equipment.

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MIL-STD-1399-3008

CONTENTS

PARAGRAPH                                                                                                                                                         PAGE

5.2.7  Pulsed 1oad.............................................................................................................................................28

5.2.8  Ramp load...............................................................................................................................................29

5.2.9  Input current waveform ..........................................................................................................................29

5.2.9.1  60 Hz user equipment greater than or equal to 1 kVA.........................................................................29

5.2.9.2  60 Hz user equipment less than 1 kVA................................................................................................30

5.2.9.3  400 Hz user equipment greater than or equal to 0.2 kVA....................................................................31

5.2.9.4  400 Hz user equipment less than 0.2 kVA...........................................................................................32

5.2.9.5  User equipment in the unacceptable range ..........................................................................................32

5.2.10  Surge/inrush current .............................................................................................................................33

5.2.11  Insulation resistance .............................................................................................................................34

5.2.12  Active ground detection........................................................................................................................35

5.2.13  Passive ground detection ......................................................................................................................35

5.3  Test requirements ......................................................................................................................................35

5.3.1  Voltage and frequency tolerance test......................................................................................................35

5.3.1.1  Apparatus.............................................................................................................................................36

5.3.1.2  Procedure.............................................................................................................................................36

5.3.2  Voltage and frequency transient tolerance and recovery test .................................................................36

5.3.2.1  Apparatus.............................................................................................................................................36

5.3.2.2  Procedure.............................................................................................................................................37

5.3.3  Voltage spike test ...................................................................................................................................37

5.3.3.1  Apparatus.............................................................................................................................................37

5.3.3.2  Procedure.............................................................................................................................................38

5.3.4  Emergency condition test .......................................................................................................................45

5.3.4.1  Apparatus.............................................................................................................................................45

5.3.4.2  Procedure.............................................................................................................................................45

5.3.4.2.1  70 msec power interruption test........................................................................................................45

5.3.4.2.2  2-Minute power interruption test......................................................................................................45

5.3.4.2.3  Power source decay test....................................................................................................................46

5.3.4.2.4  Positive excursion test ......................................................................................................................46

5.3.5  Grounding test ........................................................................................................................................46

5.3.5.1  Apparatus.............................................................................................................................................46

5.3.5.2  Procedure.............................................................................................................................................47

5.3.6  User equipment power profile test..........................................................................................................47

5.3.6.1  Apparatus.............................................................................................................................................47

5.3.6.2  Procedure.............................................................................................................................................48

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