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Industry has expressed concern that the electromagnetic emission limits of MIL-STD-461 are incompatible with the AC voltage waveform distortion limits of MIL-STD-704. Previous industry studies have attempted to establish a correlation between MIL-STD-704 and MIL-STD-461 limits, but lacked the comprehensive analyses/data required for a meaningful document comparison. This paper presents the Navy's on-going effort to investigate equipment compatibility with MIL-STD-461 and MIL-STD-704 limits and to establish a correlation between the limits of MIL-STD-461 and MIL-STD-704. A preliminary investigation was conducted to review the requirements, test methods, and measurement relationships of specifications MIL-STD-461, MIL-STD-462, MIL-STD-704, and MIL-STD-1399.

The simplicity, reliability, and weight reduction potential promised by high voltage direct current (HVDC) electrical power systems has enticed aircraft developers to propose the use of such systems in modified form for advanced aircraft. However, HVDC systems have not been flown on any military or commercial aircraft and little has been done to independently validate the tradeoffs made and to analyze the impact a HVDC system will have on Naval aviation and its support. To rectify this, the Naval Air Systems Command established a working group consisting of Defense Department activities concerned with aircraft electrical power research and development, testing, avionics development, logistics, and safety. The working group was free to examine all aspects of the development, implementation, and use of HVDC aircraft power systems.