Attachment4.2025-07-11_FSR_Creech_AFB_Bldg_1005_UPS_Redacted.pdf

This is a UPS (Uninterruptible Power Supply) maintenance and inspection report documenting preventative maintenance (PM) service performed on a Schneider Electric Galaxy VX UPS system (Model GVX-40D600-480-1-1D450, Serial Number U22022002392) located at Creech Air Force Base, Building 1005, Nevada 89169.

The report details comprehensive testing and inspection results completed on December 30, 2025. The UPS system is rated at 750 KVA/750 KW with 480V AC input and output specifications. The battery system consists of four strings of 40 C & D Technologies UPS12-600MR batteries (147 Ah capacity, 3.45 mOhms internal resistance) manufactured in December 2019, making them six years old at the time of service. All input/output voltage checks passed specification, including AC input (477.7-479.5 VAC), battery voltage float (544.2 VDC with 0.01 VAC ripple), and AC output (480.5 VAC at 59.99 Hertz). Load testing confirmed 64 KW total output capacity across three phases. Air filters passed inspection, fans passed operational testing, and the external bypass was present with load on maintenance bypass marked as "No." Detailed battery string resistance and voltage diagnostic tables and diagrams for Battery Strings #1 and #4 confirm all 40 batteries per string passed individual testing with mOhm resistance values ranging from 1.72 to 2.41 mOhms and VDC readings between 13.16 and 13.87 volts. The service is marked complete and on-line status confirmed, with parts required including 160 replacement batteries (12HX540-FR) and 26 battery jumpers.