CA Instruments MX90 Power Source and Compliance Test System

MIL-STD-704 defines the requirements outlined by the Department of Defense for the characteristics of aircraft electric power generated at the input terminals of electric utilization equipment. MIL-STD-704 is intended to detail electric power quality requirements for DoD aircraft, but may also be used with commercial planes or other vehicle types. Standards like ISO 1540 and SAE-AS1212 also dictate aircraft electric power requirements, but are not generally relevant for military aircraft, as they do not address the areas of concern for military aircraft electric power quality and need wider limits compared to MIL-STD-704. MIL-STD-704 also takes into account legacy DoD equipment and aircraft electrical systems.   General Requirements 4.1 Aircraft Electric Power System Requirements   Aircraft electrical power systems should offer electric power with the characteristics specified in this standard at the utilization equipment terminals during all powerations of the power system. Airframe manufacturers or modifiers are responsible for offering the distribution and protection network to the terminals of the utilization equipment while maintaining power characteristics specified in MIL-STD-704; characteristics of the power measured at the output terminal of an unregulated power source or the POR of a regulated power source should be within the limits specified in the detail specification applicable to the power source. Protective devices should operate independently of control/regulation equipment. 4.2 Aircraft Utilization Equipment Requirements   Utilization equipment should be compatible with the power characteristics specified in MIL-STD-704. Aircraft should operate at the performance level specified in its detail specification in all of the following modes of operation: Normal Abnormal Transfer Emergency Starting Loss of power or the loss of one or more phases of AC should not result in

IEC 61000-3-12 deals with the limitation of harmonic currents injected into the public supply system. The limits given in this International Standard are applicable to electrical and electronic equipment with a rated input current exceeding 16 A and up to and including 75 A per phase, intended to be connected to public low-voltage a.c. distribution systems of the following types:   Nominal voltage up to 240 V, single-phase, two or three wires; Nominal voltage up to 690 V, three-phase, three or four wires; Nominal frequency 50 Hz or 60 Hz. Other distribution systems are excluded. The limits given in IEC 61000-3-12 apply to equipment when connected to 230/400 V, 50 Hz systems. IEC 61000-3-12 applies to equipment intended to be connected to low-voltage systems interfacing with the public supply at the low-voltage level. It does not apply to equipment intended to be connected only to private low-voltage systems interfacing with the public supply only at the medium- or high-voltage level. IEC 61000-3-12 defines: a) Requirements and emission limits for equipment; b) Methods for type tests and simulations. Tests according to this International Standard are type tests of complete pieces of equipment. Conformity with this standard can also be determined by validated simulations. This second edition cancels and replaces the first edition published in 2004 and constitutes a technical revision. The significant technical changes with respect to the previous edition are: The replacement of the reference fundamental current I1 by the reference current Iref for the calculation of emission limits; A newly added table of current emission limits; A newly added annex (Annex A) to define test conditions for some types of equipment; Deletion of the former Annexes B (Approximate interpolation formulas) and D (Information on the PWHD factor). Retrieved 3/12/14 from IEC Webstore Note: Advanced Test Equipment Rentals can perform ISO17025 accredited