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

5.3.9.2.1  Method of test.

WARNING: This test may be hazardous due to the ungrounded condition of the UUT during the test.  Do not touch exposed metal surfaces.

a.    Determine the applicable configuration from Figures 28, 29, or 30 for the UUT.

b.    The power source shall be de-energized.  Connect the UUT as in the applicable figure utilizing the low or high frequency metering circuit as required.  Leave the power source unconnected.

c.    Place the UUT ON-OFF switch in the OFF position.

d.    Place the SAFETY GROUND switch in the CLOSED or GROUND position. e.    Connect and energize the power source.

f.        Observe the WARNING.  Place the SAFETY GROUND switch in the OPEN or UNGROUNDED position. g.        Place the UUT ON-OFF switch in the ON position.

h.    Record the voltmeter reading.

i.     Place the UUT ON-OFF switch in the OFF position.

J.     Place the SAFETY GROUND switch in the CLOSED or GROUND position. k.    Repeat steps f through J for each and every mode of operation.

NOTES:

1.  The safety ground conductor shall not carry load current.

2.  Tests for delta loads shall use a wye power source providing balanced line-to-line open circuit voltages.

FIGURE 28.  Single-phase simulated human body leakage current test setup if user equipment is connected to one single-phase source.

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