6 FY26.DWG.R400.2A9PS1.2210091-A (1).pdf

This document is a Source Control Drawing (technical specification) for a power supply component used in the WSR-88D (Weather Surveillance Radar - 1988 Doppler) system operated by the National Weather Service. The drawing pertains to CAGE Code 0WY55, Document Number 2210091, and replaces previous specification BS-2000-460-900.

The power supply unit (NOA301) is a critical component designed to provide single-phase, 60Hz, 120VAC input with triple output delivering +6.5VDC at 4.5A (30W), +15VDC at 5A (75W), and +48VDC at 12A (600W). The unit must meet stringent performance requirements including 70% efficiency at 50% load, 1.5-second startup time, short-circuit protection with automatic recovery, and output regulation specifications. The component operates across temperature ranges of -40°C to +49°C (operating) and -62°C to +60°C (non-operating), with operating humidity between 15-95%. The unit must achieve a minimum reliability rating of 166,000 hours MTBF without the fan tray and comply with FCC EMI Class A emissions standards and UL 60950 commercial safety requirements. Suggested source of supply is AEGIS Power Systems (Murphy, North Carolina, CAGE Code 06E58) with configurations available including fan tray assembly (-201), fan tray assembly only (-202), and fan upgrade kit (-203). All dimensions are specified in inches with tolerances of ±0.02 inches on two places and ±0.010 inches on three places. The unit dimensions are 6.75 inches maximum height, 12.5 inches maximum length, and 9.0 inches maximum width. Applicable referenced documents include MIL-STD-461, MIL-STD-810, and chemical conversion coating standards MIL-DTL-5541 and MIL-DTL-81706.