MIL-STD-704 Aircraft Electrical Power Characteristics is a United States Military Standard that defines a standardized power interface between a military aircraft and its equipment and carriage stores, covering such topics as voltage, frequency, phase, power factor, ripple, maximum current,

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and abnormal conditions (overvoltage and undervoltage), for both AC and DC systems. MIL-HDBK-704 is a handbook that provides guidance on test procedures for demonstration of utilization equipment to determine compliance with the aircraft electrical power characteristics of MIL-STD-704, revisions A through F. MIL-HDBK-704 is divided into 8 parts. Part 1 provides general guidance information on compliance tests, power groups, aircraft electrical operating conditions, and utilization equipment specifications. Parts 2 through Part 8 provide guidance on application of compliance tests for utilization equipment in specific power groups.

Electrical system

The standard defines the basic aircraft AC system at 115/200 volts, 400 Hz (the larger figure indicating

three-phase power Three-phase electric power (abbreviated 3φ) is a common type of alternating current used in electricity generation, transmission, and distribution. It is a type of polyphase system employing three wires (or four including an optional neutral r ...

). Variable frequency systems are allowed to switch between 360 and 800 Hz. Double voltage systems use the same frequency at 230/400 volts. Secondary power systems can be variable frequency or double voltage; they can also use 115 volts, 60 Hz to run

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products expecting mains electricity. The DC system runs at 28 volts or 270 volts.MIL-STD-704F, section 5.3.1

References

External links

MIL-STD-704F Standard - currently issue F (03-2004)MIL-STD-704 Standards

MIL-HDBK-704 (with notations)
Military of the United States standards {{standard-stub