United States Laboratory Element Electrical Power System Verification Approach

The International Space Station Product Group 3 Program Master Integration and Verie cation Plan (PMIVP), Appendix C— United States Laboratory (USL) Unique Verie cation Planning Document, provides overall guidelines for the verie cation of the laboratory element. Verie cation of the laboratory element electrical power system (EPS) focuses e rst on the risk mitigation activities for hardware and software integration. During this phase of the USL testing, critical predetermined electrical interfaces will be disconnected, and in a building block approach, each interface will be checked for the appropriate voltage, polarity, and the correct pin-to-pin assignment. Secondly, EPS verie cation objectives developed for compliance with the USL Prime Item Development Specie cation will be verie ed. This paper discusses the USL EPS architecture, key power quality requirements, and the verie cation approach developed to assure system stability under all operating conditions.