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

5.3.7  Current waveform test ............................................................................................................................48

5.3.7.1  Apparatus.............................................................................................................................................48

5.3.7.2  Procedure.............................................................................................................................................48

5.3.8  Voltage and frequency modulation test ..................................................................................................49

5.3.8.1  Apparatus.............................................................................................................................................49

5.3.8.2  Procedure.............................................................................................................................................50

5.3.9  Simulated human body leakage current tests for personnel safety .........................................................50

5.3.9.1  Apparatus.............................................................................................................................................50

5.3.9.2  Procedure.............................................................................................................................................50

5.3.9.2.1  Method of test...................................................................................................................................51

5.3.10  Equipment insulation resistance test.....................................................................................................53

5.3.10.1  Insulation resistance test....................................................................................................................53

5.3.10.2  Active ground detector (AGD) test....................................................................................................53

6.  NOTES ...............................................................................................................................................................54

6.1  Intended use...............................................................................................................................................54

6.2  Acquisition requirements...........................................................................................................................54

6.3  Subject term (key word) listing .................................................................................................................54

6.4  International standardization agreement implementation..........................................................................54

6.5  Deviation requests .....................................................................................................................................54

6.6  Changes from previous issue.....................................................................................................................54

6.7  Automatic ground detection (AGD) legacy record....................................................................................54

FIGURES

1.  Typical interface of electric power system and user equipment....................................................................2

2.  Frequency modulation ...................................................................................................................................5

3.  Voltage amplitude modulation ......................................................................................................................6

4.  Voltage transient tolerance ............................................................................................................................7

5.  Voltage spike.................................................................................................................................................8

6.  Voltage spike impulse wave shape................................................................................................................8

7.  Voltage deviation factor variables...............................................................................................................10

8.  Voltage and frequency decay characteristics on loss of prime mover for typical steam turbine driven generator set, Type I, 60-Hz electric power system.....................................................................................16

9.  Type I worst case and frequency tolerance envelopes.................................................................................18

10.  Type II worst case and frequency tolerance envelopes .............................................................................19

11.  Type III worst case and frequency tolerance envelopes ............................................................................20

12.  Types I and II, 440 Vrms power - worst case and user voltage tolerance envelopes.................................22

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