98-19781B001.pdf

This is a source control drawing for a 3 kilowatt permanent magnet alternator designed for use with a four-cycle diesel engine operating between 2,900 to 3,600 RPM. The drawing is an AutoCAD technical specification document with multiple sheets detailing mechanical and electrical configurations.

The alternator is specified for operation at 3,600 RPM with no load, producing 190 volts minimum DC output through a power converter (part numbers 98-19604 and 98-19770). Key performance requirements include 90% minimum PMA efficiency at 3.3 kW with 0.8 power factor at 3,450 RPM, stabilized operation at 150°F ambient temperature, 24-pound maximum weight, and permanent magnets utilizing samarium cobalt material. The unit must operate in harsh environments with temperatures ranging from minus 40°F to plus 160°F, withstand salt and fog exposure, and maintain 3-second short circuit recovery with no mechanical failure. Generator leads consist of 160A, 600-volt TFE insulated stranded wire with four wire terminations to withstand 8-pound pull test minimum. The insulation class is limited to 80°C maximum temperature rise per NEMA MG-1 standards. Approved suppliers include C.E. Niehoff Inc. (Evanston, IL 60202) and MDOC Inc. (Blacksburg, VA 24060-3127). The drawing indicates CAD maintenance with changes incorporated by the design activity, and includes detailed wiring layouts, mechanical assembly views, and component identification per MIL-STD-130 standards.