Apollo-era AC Control Box and AC Sensor Assembly, approximately 14 x 8 x 5, consisting of a “Box Assy-A C Power Control Unit,” S/N 063b2AAJ0431, a “Sensor, AC Over/Undervoltage,” by Autonetics, complete with manufacturer’s label, S/N 101740469BHA. The assembly sat on the output side of the three AC inverters to select the individual AC output from each of the 3 onboard inverters for application on the spacecraft's electrical bus, and to report (via alarms on the Apollo Main Display console) either an undervoltage or overvoltage condition generated as a result of an inverter not converting DC to AC voltage properly or because the DC input (supplied by the fuel cells), or improper/lost timing to the inverters and complete with the sensor’s relays. The assembly has three North American Rockwell tags tied to one end, dating from 1967-1975, for the control unit. In very good condition. RRAuction COA.
Terms and abbreviations used in our descriptions.