Engine Generators
P1 batch 4: hazardous-location installations, document confidentiality and AI use, generator paralleling switchgear, interrupter switchgear, medium-voltage drives and metal-enclosed bus now owned; bare-text mentions re-pointed to the new standards
Showing changes from Rev 9
to Rev 10
in Engine Generators.
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title: Engine Generators
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When to use: Packaged stationary engine-generator sets rated 1000 V and below, listed to UL 2200, furnished as the alternate source for emergency, legally required standby, optional standby, and critical operations loads, and sets the project applies as a prime or continuous source. Covers the engine and its fuel requirements by fuel type, the alternator and its excitation, the governor and voltage regulator, the set-mounted controller and the remote annunciator, the main line circuit breaker and the neutral bonding at the set, the cooling system, the fuel system on the skid including the sub-base tank, the exhaust silencer and aftertreatment, the enclosure and its sound attenuation, the starting batteries and charger, vibration isolation and seismic certification, factory and field testing, installation, warranty, and spare parts.
− Not intended for: The system-level design of the emergency and standby power system, including load classification, the NFPA 110 level, type, and class, the alternate source capacity, the transfer scheme, and selective coordination ([[sync/emergency-and-standby-power]]); the automatic transfer switch and its time delays, exerciser, and neutral treatment ([[sync/automatic-transfer-switches]]); bulk fuel storage tanks as vessels ([[sync/fuel-dispensing-and-storage-tanks]]) and the fuel-oil transfer, polishing, day-tank control, and piping system beyond the skid ([[sync/fuel-oil-systems]]); the fuel gas piping to the engine connection ([[sync/fuel-gas-piping]]); paralleling switchgear and the load sharing of more than one set on a common bus; alternators rated above 1000 V; distributed generation operated in parallel with the utility for economic dispatch under IEEE 1547; portable and towable generators; combustion turbines; fuel cells; and stored-energy sources ([[sync/uninterruptible-power-supply-systems]], [[sync/dc-battery-systems]]).
+ Not intended for: The system-level design of the emergency and standby power system, including load classification, the NFPA 110 level, type, and class, the alternate source capacity, the transfer scheme, and selective coordination ([[sync/emergency-and-standby-power]]); the automatic transfer switch and its time delays, exerciser, and neutral treatment ([[sync/automatic-transfer-switches]]); bulk fuel storage tanks as vessels ([[sync/fuel-dispensing-and-storage-tanks]]) and the fuel-oil transfer, polishing, day-tank control, and piping system beyond the skid ([[sync/fuel-oil-systems]]); the fuel gas piping to the engine connection ([[sync/fuel-gas-piping]]); paralleling switchgear and the load sharing of more than one set on a common bus ([[sync/generator-paralleling-switchgear]]); alternators rated above 1000 V; distributed generation operated in parallel with the utility for economic dispatch under IEEE 1547; portable and towable generators; combustion turbines; fuel cells; and stored-energy sources ([[sync/uninterruptible-power-supply-systems]], [[sync/dc-battery-systems]]).
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- the short-circuit, coordination, and arc-flash studies that establish the breaker settings and the labels ([[sync/short-circuit-study]], [[sync/protective-coordination-study]], [[sync/arc-flash-study]])
- the concrete pad as a structure ([[sync/concrete-pads]]) and the room an indoor set occupies ([[sync/electrical-rooms]])
−- paralleling switchgear, medium-voltage alternators, utility-interactive operation, portable sets, turbines, fuel cells, and stored-energy sources
+- paralleling switchgear and utility-interactive operation ([[sync/generator-paralleling-switchgear]]), medium-voltage alternators, portable sets, turbines, fuel cells, and stored-energy sources
## The location of the set shall be as indicated on [[drawing: the electrical plans]].
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### The voltage regulator shall include an underfrequency roll-off that reduces the voltage in proportion to frequency below an adjustable knee, an overvoltage limit, an overexcitation limit, and a voltage adjustment of not less than ±5 percent at the controller.
−### Where the set is furnished with a governor that supports droop for paralleling, the voltage regulator shall include reactive droop compensation and a paralleling provision, and the paralleling itself shall be furnished under a separate standard.
+### Where the set is furnished with a governor that supports droop for paralleling, the voltage regulator shall include reactive droop compensation and a paralleling provision, and the paralleling itself shall be furnished under [[sync/generator-paralleling-switchgear]].
## Alternator Sizing for Motor Starting {toc}
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## Training shall be delivered by the manufacturer's authorized service representative at the site with the set in service, and a sign-in record of the topics covered and the personnel attending shall be delivered with the closeout submittals.