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

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UHF/700 MHz P25 Radio Communications SystemRequestion for ProposalsCaroline County, Virginiae. Perform a simulation of power failure to test generator start up andATS to pick up building load correctly.f. Return to commercial power and test generator and ATS todemonstrate correct cycling to normal commercial power.g. Perform a load test of the generator, to ensure full load frequencyand voltage is within specification by using building load. This testshall be run for a minimum of one hour.h. Test and verify all remote indicators and controls.2. The SELECTED VENDOR shall provide complete report(s) of all testingperformed.6.4.1 Propane GeneratorA. The prime motor shall be a liquid cooled, propane gas fueled, naturally aspiratedengine of 4-cycle design.B. The engine shall have sufficient horse power rating to drive the generator to fulloutput power without a gear box between the engine and generator.C. The engine shall have a battery charging DC alternator with a solid state voltageregulator.D. The alternator shall be protected by internal thermal overload protection and anautomatic reset field circuit breaker.E. One step load acceptance shall be 100% of generator set nameplate rating andmeet the requirements of NFPA 110 paragraph 5-13.2.6.F. The electric plant shall be mounted with vibration isolators on a welded steelbase that shall permit suitable mounting to any level surface.G. A main line output circuit breaker carrying the UL mark shall be factory installed.H. An alternator strip heater shall be installed to prevent moisture condensationfrom forming on the alternator windings.I. Controls:1. All engine alternator controls and instrumentation shall be designed, built,wired, tested and shock mounted in a NEMA 1 enclosure mounted to theMay 27, 2011 Page 59 of 134
UHF/700 MHz P25 Radio Communications SystemRequestion for ProposalsCaroline County, Virginiagenerator set by the manufacturer. It shall contain panel lighting, a fusedDC circuit to protect the controls and a +/-5% voltage adjusting control.2. A programmable cyclic cranking limiter shall be provided to open thestarting circuit after four attempts if the engine has not started within thattime. Engine control modules must be solid state plug-in type for highreliability and easy service.3. The panel shall include:a. Analog and/or digital meters to monitor:1) AC voltage2) AC current3) AC frequencyb. A phase selector switchc. Emergency stop switchd. Audible alarme. Battery charger fusef. Programmable engine controlg. Monitoring module4. The programmable module shall include:a. Manual OFF / AUTO switchb. Four LED’s to indicate:1) Not In Auto2) Alarm Active3) Generator Running4) Generator Ready5. The module shall display all pertinent unit parameters including:a. Generator Status – ON / OFF / AUTOb. Instrumentation – Real-time readouts of the following engine andalternator analog values:May 27, 2011 Page 60 of 134
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Caroline County, Virginia Request for Proposals Project 25 Radio ...

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