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Orange County Emergency Services -Generator <br />PDC Project 24030 Engine Generators 26 32 13 - 6 <br />F.Engine Cooling System: <br />1.System Type: Closed-loop,liquid-cooled,with unit-mounted radiator/fan and engine-driven <br />coolant pump;suitable for providing adequate cooling while operating at full load under worst <br />case ambient temperature. <br />2.Fan Guard: Provide suitable guard to protect personnel from accidental contact with fan. <br />G.Engine Air Intake and Exhaust System: <br />1.Air Intake Filtration: Provide engine-mounted,replaceable,dry element filter. <br />2.Engine Exhaust Connection: Provide suitable,approved flexible connector for coupling <br />engine to exhaust system. <br />3.Exhaust Silencer: Provide critical grade or better exhaust silencer with sound attenuation not <br />less than basis of design;select according to manufacturer's recommendations to meet <br />sound performance requirements,where specified. <br />2.04 ALTERNATOR (GENERATOR) <br />A.Alternator: 4-pole,1800 rpm (60 Hz output)revolving field,synchronous generator complying with <br />NEMA MG 1;connected to engine with flexible coupling;voltage output configuration as indicated, <br />with reconnectable leads for 3 phase alternators. <br />B.Exciter: <br />1.Exciter Type: Brushless;provide permanent magnet generator (PMG)excitation system; <br />self-excited (shunt)systems are not permitted. <br />2.PMG Excitation Short-Circuit Current Support: Capable of sustaining 300 percent of rated <br />output current for 10 seconds. <br />3.Voltage Regulation (with PMG excitation): Plus/minus 0.5 percent for any constant load from <br />no load to full load. <br />C.Temperature Rise: ​​maximum 130 degrees Farenheit​​. <br />D.Insulation System: NEMA MG 1,Class H;suitable for alternator temperature rise. <br />E.Enclosure: NEMA MG 1,drip-proof. <br />F.Total Harmonic Distortion: Not greater than five percent. <br />2.05 GENERATOR SET CONTROL SYSTEM <br />A.Provide microprocessor-based control system for automatic control,monitoring,and protection of <br />generator set.Include sensors,wiring,and connections necessary for functions/indications <br />specified. <br />B.Control Panel: <br />1.Control Panel Mounting: Unit-mounted unless otherwise indicated;vibration isolated. <br />2.Generator Set Control Functions: <br />a.Automatic Mode: Initiates generator set start/shutdown upon receiving corresponding <br />signal from remote device (e.g.automatic transfer switch). <br />b.Manual Mode: Initiates generator set start/shutdown upon direction from operator. <br />c.Reset Mode: Clears all faults,allowing generator set restart after a shutdown. <br />d.Emergency Stop: Immediately shuts down generator set (without time delay)and <br />prevents automatic restarting until manually reset. <br />e.Cycle Cranking: Programmable crank time,rest time,and number of cycles. <br />f.Time Delay: Programmable for shutdown (engine cooldown)and start (engine warmup). <br />g.Voltage Adjustment: Adjustable through range of plus/minus 5 percent. <br />3.Generator Set Status Indications: <br />a.Voltage (Volts AC): Line-to-line,line-to-neutral for each phase. <br />b.Current (Amps): For each phase. <br />c.Frequency (Hz). <br />d.Real power (W/kW). <br />e.Reactive power (VAR/kVAR). <br />f.Apparent power (VA/kVA). <br />Docusign Envelope ID: DEDB83DA-7916-8AE5-81B0-AA1EA4D56AE9