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39 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 240 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 241 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 242 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 243 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 244 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 245 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 246 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 247 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 248 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 249 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 250 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 251 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 252 253 APPENDIX E GLOSSARY E-1 ACRONYMS. AC Alternating Current AIAG Aut
hour(h)) λ = Tf/Tp λy, Failure Rate (failures/year(y)) λy = Tf/(Tp / 8760) MDT, Mean Down Time (h) MDT = (Rdt + Rlt + Mdt) / Tde MTBF, Mean Time Between Failures (h) MTBF = Tp / Tf MTBM, Mean Time Between Maintenance (h) MTBM = Tp / Tde MTTM, Mean Time To Maintain (h) MTTM = Mdt / Tma MTTR, Mean Time To Repair (h) MTTR = Rdt / Tf R(t), Reliability (for time interval t) R(t) = e−λt Hrdt/Year, Hours Downtime per Year Hrdt/Year = (1 - Ao) × 8760 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 236 Table D-2 USACE-PREP Equipment Reliability Database UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 237 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 238 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 239 UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 240 UFC 3-520-02 27 July
UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 UNIFIED FACILITIES CRITERIA (UFC) APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED FACILITY ENERGY SYSTEM RESILIENCE AND RELIABILITY UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 This Page Intentionally Left Blank UFC 3-520-02 27 July 2023 Change 1, 29 January 2025 UNIFIED FACILITIES CRITERIA (UFC) FACILITY ENERGY SYSTEM RESILIENCE AND RELIABILITY Any copyrighted material included in this UFC is identified at its point of use. Use of the copyrighted material apart from this UFC must have the permission of the copyright holder. U.S. ARMY CORPS OF ENGINEERS (Preparing Activity) NAVAL FACILITIES ENGINEERING SYSTEMS COMMAND AIR FORCE CIVIL ENGINEER CENTER Record of Changes (changes are indicated by \1\ ... /1/) Change No. Date Locati
itary Assets UFC 3-401-01, Mechanical Engineering UFC 4-141-03 09 December 2024 112 UFC 3-410-01, Heating, Ventilating, and Air Conditioning Systems UFC 3-410-02, Direct Digital Control for HVAC and Other Building Control Systems UFC 3-460-01, Design: Petroleum Fuel Facilities UFC 3-460-03, Petroleum Fuel Systems Maintenance UFC 3-501-01, Electrical Engineering UFC 3-510-01, Foreign Voltages and Frequencies Guide UFC 3-520-01, Interior Electrical Systems UFC 3-520-02, Facility Energy System Resilience and Reliability UFC 3-520-05, Stationary and Mission Batteries UFC 3-530-01, Interior and Exterior Lighting Systems and Controls UFC 3-540-01, Engine-Driven Generator Systems for Prime and Standby Power Applications UFC 3-560-01, Operation and Maintenance: Electrical Safety UFC 3-580-01, Tele
ications MIL-STD-188-125-1A, High-Altitude Electromagnetic Pulse (HEMP) Protection for Ground-Based C41 Facilities Performing Critical, Time-Urgent Missions, Part 1 Fixed Facilities NSTISSI 7000, TEMPEST Countermeasures for Facilities UNIFIED FACILITIES CRITERIA https://www.wbdg.org/dod/ufc UFC 1-200-01, DoD Building Code UFC 1-200-02, High Performance and Sustainable Building Requirements FC 1-300-09N, Navy and Marine Corps Design Procedures UFC 3-440-01, Facility-Scale Renewable Energy Systems UFC 3-510-01, Foreign Voltages and Frequencies Guide UFC 3-520-01, Interior Electrical Systems UFC 3-520-02, Facility Energy System Resilience and Reliability UFC 3-520-05, Stationary and Mission Batteries UFC 3-530-01, Interior and Exterior Lighting Systems UFC 3-535-01, Visual Air Navigation Faci
ates. (T-2) 15.8.9.1. Electrical power system design will be IAW AFMAN 32-1062, Electric Systems, Power Plants and Generators, AFMAN 32-1065. Reference UFC 3-501-01, Electrical Engineering, UFC 3-520-01, Interior Electrical Systems, UFC 3-530-01, and UFC 3-550- 01, Exterior Electrical Power Distribution, UFC 3-600-01, Fire Protection Engineering for Facilities, and Engineering Technical Letter 02-15, Fire Protection Engineering Criteria - New Aircraft Facilities. 15.8.10. The cost of running power (such as, lighting, and electrical) from prime or temporary power sources to the sunshades will be included in the cost estimate and will be borne by the owning unit. (T-2) 15.8.11. In no case will the loss of parking spots resulting from the purchase or installation of aircraft sunshades be a pr
eld and Heliport Planning and Design UFC 3-301-01, Structural Engineering UFC 3-400-02, Design: Engineering Weather Data UFC 3-410-01, Heating, Ventilating, and Air Conditioning Systems UFC 3-420-01, Plumbing Systems UFC 3-450-01, Noise and Vibration Control UFC 3-490-06, Elevators UFC 3-501-01, Electrical Engineering UFC 3-520-01, Interior Electrical Systems UFC 3-520-05, Stationary and Mission Batteries UFC 3-530-01, Interior and Exterior Lighting Systems and Controls UFC 3-535-01, Visual Air Navigation Facilities UFC 3-535-02, Design Drawings for Visual Air Navigation Facilities UFC 3-540-01, Engine Driven Generator Systems for Backup Power Applications UFC 3-575-01, Lightning and Static Electricity Protection Systems UFC 3-580-01, Telecommunications Interior Infrastructure Planning and
FC 3-340-02, Structures to Resist the Effects of Accidental Explosions, https://www.wbdg.org/ffc/dod/unified-facilities-criteria-ufc UFC 3-400-02, Design: Engineering Weather Data, https://www.wbdg.org/ffc/dod/unified-facilities-criteria-ufc UFC 3-401-01, Mechanical Engineering, https://www.wbdg.org/ffc/dod/unified-facilities- criteria-ufc UFC 3-410-01, Heating, Ventilation, and Air Conditioning Systems, https://www.wbdg.org/ffc/dod/unified-facilities-criteria-ufc UFC 3-501-01, Electrical Engineering, https://www.wbdg.org/ffc/dod/unified-facilities- criteria-ufc UFC 3-520-01, Interior Electrical Systems, https://www.wbdg.org/ffc/dod/unified- facilities-criteria-ufc FC 4-420-07F 24 April 2018 131 UFC 3-520-05, Stationary Battery Areas, https://www.wbdg.org/ffc/dod/unified-facilities- criter
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