Cummins C2000N6CB 480V Gas Generator Set 65dBA at 23ft Enclosure

We are pleased to provide a proposal for the supply of one (1) Cummins C2000N6CB lean-burn, spark

ignited engine generator set(s), each rated Continuous Duty at 2000 kWe at ISO8528 conditions, 480 volts,

3 phase, 4 wire, 60 hertz for operation on natural gas in accordance with S-1463 and D-5744 data sheets

attached. Suitable for standby (non-life safety), peak shaving, or continuous operation in island mode or

in parallel with the utility.

To include our standard accessories plus the following for each generator set:

- Cummins engine model QSV91G, 18 cylinder (Vee configuration) turbocharged and charge air cooled,

natural gas fueled, lean burn spark ignition engine to standard build specification

- Genset control featuring the PCC3300 microprocessor-based genset monitoring, metering,

AmpSentry generator protection, and control system as described in the attached spec sheet – S-1570

- Cummins Generator Technologies – Stamford model P80 – 480VAC VAC (ADS-335), 2 bearing, 4 pole

brushless, rotating field, self-exciting machine incorporating permanent magnet excitation with two

thirds pitch windings. Class H insulation with 105 °C temperature rise, with winding and bearing RTD’s

and anti-condensation heater

- Freestanding termination box (NEMA1) with a 3000A electrically operated, draw out circuit breaker

with SEL-751A protective relay – Bottom entry for customer load cable connections

- 1 Set of 4x 12 VDC lead-acid starting batteries, racks, cables

- Battery charger, 120/208 VAC Input, 30A / 24VDC output

- Natural gas fuel train including manual shut-off valve, filter with differential pressure gauges, pressure

regulator with output pressure gauge, dual solenoid valve with interstitial leak detection, and flexible

braid. Massachusetts code compliant. Requires 5-7psi supply pressure

- 24 VDC pre-lube system

- Automatic control valve to maintain engine lubrication oil at constant level is fitted to the engine

- 50-gal Oil make-up tank

- 6kW circulating oil heater

- Resistive element jacket water heater (6 kW), thermostatically controlled

- Spring type, vibration isolators – Non-seismic rated

- HT & LT Circuit Accessories – (1) bladder type expansion tank, (1) pressure switch, (1) pressure relief

valve, (2) air vent valves, and (2) air eliminator valves.

Heat dump radiator for HT & LT circuits rated for 104 °F ambient air temperature to fans and 1000 ft

asl. Horizontal cores for vertical air flow. Includes 480 VAC electric fan motors rated for low noise 65

dB(A) at 23 ft – Radiator shipped loose with 6.5 ft. (2 m.) legs. Assembly, installation, piping, and

wiring by others

- Roof-mounted SCR for emissions reduction to meet Massachusetts requirements – Shipped loose to

be re-installed by others

a. 300gal Urea tank

b. 5HP 20CFM air compressor with filter and dryer

c. After treatment emissions:

i. 0.05g/hp-hr NOx

ii. 0.17 g/hp-hr CO (93% reduction)

iii. 0.2 g/hp-hr NMHC (50% reduction)

- Exhaust silencer to reduce noise to 65 dBA at 23 ft – Shipped loose to be re-installed by others

- Stack-in-Stack exhaust stack – Shipped loose to be re-installed by others

- Standard factory test reports for genset only

- First fills of coolant (275 gal) and lube oil (55 gal) included

Sound Attenuated, Walk-In Enclosure

One (1) weather-protective, sound-attenuated, walk-in enclosure to house one (1) Cummins model

C2000N6CB spark ignited engine generator set with a free-standing terminal box with circuit breaker.

Enclosure to reduce generator noise in free field to 65 dB(A) at 23 feet from enclosure (based on free

field conditions @ 1.5m above grade).

Approximate Overall Dimensions (Including Hoods and Base):

652"L x 138” W x 164"H

Approximate weight: 115,000 lbs

Approximate Enclosure Dimensions:

480"L x 138"W x 150"H

Base Footprint:

480"L x 138"W

Access:

Four (4) access doors, with locking handles keyed alike, two-point latches, lever-type panic release

from inside enclosure.

Air Intake:

Exterior fixed louvers with sound absorbing baffle systems and bird screen for cooling and

combustion air. Interior galvanized motor operated dampers with actuators (spring-open/motorclose).

Air Discharge

Exterior sound-absorbing vertical plenum with sound-absorbing baffle system, bird screen, and gravity

dampers at cooling air discharge.

Miscellaneous:

- Thermal insulation for internal exhaust piping

- Installation and piping of urea tank inside enclosure

- External installation of silencer after-treatment SCR. Re-installed in the field by others

- HT/LT circuit insulated coolant piping extended to enclosure exterior wall

- Installation of gas fuel train and carbon steel piping to enclosure exterior

- Fall protection rings on each end of enclosure end

- Rain gutters above doors

- Crankcase, water drains to enclosure exterior

Electrical for Enclosure:

- 480Y/277V 3P 4W 150A Panelboard

- 5kW Space Heaters w/ thermostats and shut-off relays

- Direct-drive 480V VFD controllable ventilation fans, gravity dampers, and motor side ring guards

- 30kVA 480/208V 3P transformer

- 208Y/120V 3P 4W 100A Panel board

- Interior and exterior LED lights

- Light switches

- Interior GFCI receptacles

- Emergency break-glass stations on exterior

- Emergency dual-head lights

- Heat and gas detectors terminated to enclosure ventilation VFD controller

All electrical wiring will be in conduits to meet national electric code.

Enclosure requires separate 480V three-phase shore power supply to power all ancillary equipment.