Caroline County, Virginia Request for Proposals Project 25 Radio ...

UHF/700 MHz P25 Radio Communications SystemRequestion for ProposalsCaroline County, Virginia6.4 Generator and Automatic Transfer Switch (ATS)A. This section provides specifications and requirements for standby power systemsto supply electrical power in the event of failure of normal supply, consisting of aliquid cooled engine, an AC alternator and system controls with all necessaryaccessories for a complete operating system, including but not limited to theitems as specified.B. The SELECTED VENDOR shall provide an emergency generator system at eachnew radio communications site for backup power.C. The SELECTED VENDOR shall perform electrical loading analysis for shelterequipment, including HVAC subsystems, during preliminary design to verifygenerator size and fuel tank capacity. All electrical loading calculations shallinclude a 50% expansion factor, and all assumptions regarding powerconsumption and duty factor shall be thoroughly explained.1. For the purpose of the proposal, RESPONDENT shall assume thefollowing:a. 35 kWb. Single phasec. 60 Hzd. Propane fuele. Minimum 72 hour run time at full loadD. In the event of a commercial power outage, the emergency generator shallprovide power to the entire shelter without system outage.E. Quality Assurance – The system shall be supplied by a manufacturer who hasbeen regularly engaged in the production of engine-alternator sets, automatictransfer switches, and associated controls for a minimum of 10 years, therebyidentifying one source of supply and responsibility.F. The generator system and all accessories and ancillary equipment shall complywith the following standards:1. NFPA 37 Flammable and Combustible Liquids Code2. NFPA 55 Standard for the Storage and Handling of Compressed GasesMay 27, 2011 Page 57 of 134