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Gaseous Fuel Generator Set

Model GFEB
KW(KVA) @ 0.8 P.F.
Compression 60 HZ-1800 RPM 50 HZ-1500 RPM
Ratio Standby Prime Standby Prime
10.1 (note 1) 350(437) 320(400) 290(362) 260(325)
8.5:1 (note 2) 330(412) 300(375) 260(325) 230(288)

Notes:
(1) 21°C (90° F) or lower water temperature to the aftercooler or use of air to air aftercooler
w/100°F or lower air temperature to the radiator.
(2) 54°C (130° F) or lower water temperature to the aftercooler or use of air to air aftercooler
w/130°F or lower air temperature to the radiator

Fuel Application Guide

Compression Ratio 8.5:1 10:1

Dry Processed Natural Gas Yes Yes

Propane (HD-5) Yes NA

All gases such as field gas, digester and sewage gas will require
an analysis of the specified gas and pre-approval from CNGE.
Consult your Cummins Distributor for details.

Description Features
The Cummins NPower GF-series commercial generator set is a Cummins Heavy-Duty Engine - Rugged 4-cycle
fully integrated power generation system providing optimum industrial spark ignited engine delivers reliable power,
performance, reliability, and versatility for stationary standby or low emissions, and fast response to load changes.
prime power applications. Alternator - Several alternator sizes offer selectable
A primary feature of the GF GenSet is strong motor-starting motor-starting capability with low reactance 2/3 pitch
capability and fast recovery from transient load changes. The windings, low waveform distortion with non-linear loads,
torque-matched system includes a heavy-duty Cummins 4-cycle fault-clearing short-circuit capability, and class H
spark ignited engine, an AC alternator with high motor-starting insulation. The alternator electrical insulation system is
kVA capacity, and an electronic voltage regulator with three phase UL1446 Recognized.
sensing for precise regulation under steady-state or transient Control Systems - The PowerCommand electronic
loads. The GF GenSet accepts 100% of the nameplate standby control is standard equipment and provides total genset
rating in one step. * system integration, including automatic remote
The standard PowerCommand® digital electronic control is an starting/stopping, precise voltage regulation, alarm and
integrated system that combines engine and alternator controls status message display, AmpSentryTM protection, output
for high reliability and optimum GenSet performance. metering, auto-shutdown at fault detection, and NFPA
Optional weather-protective housings and coolant heaters shield 110 compliance. PowerCommand control is Listed to
the generator set from extreme operating conditions. UL508.
Environmental concerns are addressed by low exhaust emission Cooling System - Standard cooling package provides
engines, sound-attenuated housings, exhaust silencers, and dual- reliable running at the rated power level, at up to 40oC
wall fuel tanks. A wide range of options, accessories, and ambient temperature.
services are available, allowing configuration to your specific Housings - Optional weather-protective housings are
power generation needs. available.
Every production unit is factory tested at rated load and power Certifications - Generators are designed, manufactured,
factor. This testing includes demonstration of rated power and tested, and certified to relevant UL, NFPA, ISO, IEC, and
single-step rated load pickup. Cummins NPower manufacturing CSA standards.
facilities include quality standards, emphasizing our commitment
to high quality in the design, manufacture, and support of our Warranty and Service - Backed by a comprehensive
products. The generator is CSA certified. The PowerCommand warranty and worldwide distributor service network.
control is UL508 Listed.
All Cummins NPower generator sets are backed by a *Adequate fuel pressure and volume must be provided. Engines
comprehensive warranty program and supported by a worldwide must be equipped with a functioning jacket water heater.
network of 170 distributors and service branches to assist with
warranty, service, parts, and planned maintenance support.

© 2004 Cummins NPower Specifications subject to change without notice CNP – 1350 (7-04)
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Generator Set
The general specifications provide representative configuration details. Consult the outline drawing for installation design.

Specifications – General
See outline drawing 6084G for installation design specifications. (Drawing# 6513-01D – for enclosed units)
Unit Width, in (mm) 57” (1448)
Unit Height, in (mm) 79” (2007)
Unit Length, in (mm) 140” (3556)
Unit Dry Weight, lb (kg) 9332 (4233)
Rated Speed, rpm 1800
Voltage Regulation, No Load to Full Load ±1.0%
Random Voltage Variation ±1.0%
Frequency Regulation 5%
Random Frequency Variation ±0.5%
Radio Frequency Interference Optional PMG excitation operates in compliance with BS800 and
VDE level G and N. Addition of RFI protection kit allows operation
per MIL-STD-461 and VDE level K.

Rating Definitions
Standby Rating based on: Applicable for supplying emergency power for the duration of normal power interruption. No
sustained overload capability is available for this rating. (Equivalent to Fuel Stop Power in accordance with ISO3046, AS2789,
DIN6271 and BS5514). Nominally rated.
Prime (Unlimited Running Time) Rating based on: Applicable for supplying power in lieu of commercially purchased
power. Prime power is the maximum power available at a variable load for an unlimited number of hours. A 10% overload
capability is available for limited time. (Equivalent to Prime Power in accordance with ISO8528 and Overload Power in
accordance with ISO3046, AS2789, DIN6271, and BS5514). This rating is not applicable to all generator set models.
Base Load (Continuous) Rating based on: Applicable for supplying power continuously to a constant load up to the full
output rating for unlimited hours. No sustained overload capability is available for this rating. Consult authorized distributor for
rating. (Equivalent to Continuous Power in accordance with ISO8528, ISO3046, AS2789, DIN6271, and BS5514). This rating
is not applicable to all generator set models.

Site Derating Factors

Engine power available up to 3000’ (m) at ambient temperatures up to 104°F (40°C). Above 3000’ (m)derate at 4% per 1000
ft (305 m), and 1% per 10°F (2% per 11°C) above 104°F (40°C).

1) Data represents gross engine performance capabilities obtained and corrected in accordance with SAEJ1349 conditions of 29.61 in. Hg.(100KPa) barometric pressure
[300 ft. (91m) altitude], 77°F (25°C) inlet air temperature, and 0.30 in Hg.(100KPa) water vapor pressure using dry processed natural gas fuel with 905 BTU per standard
cubic foot (33.72 ki/l) lower heating value. Deration may be required due to altitude, temperature or type of fuel. Consult your local Cummins Distributor for details.

2) FUEL SYSTEMS

Standard Carburetor – IMPCO Make

Low Pressure Dry Processed Natural Gas – ( 905 BTU/ft.² L.H.V.)
Running Pressure to Carburetor (After Regulation) – in. H20 (mm H20) ……………………………………………………………………………………………. 5 ~ 7 (127~177)
Running Pressure to Engine Mounted Regulator ~ in. H20 (mm H20) …………………………………………………………………………………………...10 ~ 20 (254 ~ 508)
Minimum Gas Supply Pipe Size @ Engine – in. (mm)…………………………………………………………………………………………………………………………2.0 (50.8)
Gas Supply Filter Pressure Rating – PSI (kPa)……………………………………………………………………………………………………………………………..….100 (690)

The preceding pipe sizes are only suggestions and piping may vary with temperatures, distance from fuel supply and application of local codes. Gas must be available at
adequate volume and pressure for engine at the regulator.

© 2004 Cummins NPower Specifications subject to change without notice CNP – 1350 (7-04)
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Engine
Cummins heavy-duty spark ignited engines use advanced combustion technology for reliable and stable power, low
emissions, and fast response to sudden load changes.
Electronic governing is standard for applications requiring constant (isochronous) frequency regulation such as Uninterruptible
Power Supply (UPS) systems, non-linear loads, or sensitive electronic loads. Optional coolant heaters are recommended for
all emergency standby installations or for any application requiring fast load acceptance after start-up.

Specifications – Engine
Base Engine Cummins Model GTA19G2
3
Displacement in (L) 1150 (19)
Overspeed Limit, rpm 2100
Regenerative Power, kW -
Cylinder Block Configuration Cast iron with replacable wet cylinder liners
Cranking Current 550 amps at ambient temperature of 32°F (0°C)
Battery Charging Alternator 37 amps
Starting Voltage 24-volt, negative ground
Lube Oil Filter Types Single spin-on canister-combination full flow with bypass
o o
Standard Cooling System 104 F (40 C) ambient radiator

Fuel STANDBY
Fuel Consumption Load 1/2 3/4 Full
(Approximate) kW 175 262 350
CFH 2519 3484 4200
Cooling
Heat Rejection to Coolant* 20059 Btu/Min (352) kw
Heat Rejection to Room 2265 Btu/Min (39) kw
Coolant Capacity (with radiator) 33 US/Gal (126) L
Coolant Flow Rate 189 Gal/Min (717) L/Min
Maximum Coolant Friction Head 5 psi (34) kPa
Maximum Coolant Static Head 60 ft (18) m
Radiator Fan Load 26 HP (19.4) kw
Air
Combustion Air 1290 cfm
Maximum Air Cleaner Restriction 15 in H20 (381) mm H20
Allternator Cooling Air 1770 cfm (50.1) cu m/min
Radiator Cooling Air 40000 cfm (18856) L/sec
Maximum Restriction at 0.50 in H20 (13) mm H20
Radiator Discharge (static)
Exhaust
Gas Flow (Full Load) 3489 cfm (1647) L/sec
Gas Temperature 1350°F (732) °C
Maximum Back
Pressure 2 in Hg (50) mm Hg
Engine
Gross Engine Power Output 531 bhp (396) kwm
BMEP 203 psi (1400) kPa
Piston Speed 1875ft/min (9.5) m/s
* Jacket water only. Contact factory for aftercooler heat rejections and coolant flows

© 2004 Cummins NPower Specifications subject to change without notice CNP – 1350 (7-04)
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Alternator
Several alternators are available for application flexibility based on the required motor-starting kVA and other requirements.
Larger alternator sizes have lower temperature rise for longer life of the alternator insulation system. In addition, larger
alternator sizes can provide a cost-effective use of engine power in across-the-line motor-starting applications and can be
used to minimize voltage waveform distortion caused by non-linear loads.
Single-bearing alternators couple directly to the engine flywheel with flexible discs for drivetrain reliability and durability. No
gear reducers or speed changers are used. Two-thirds pitch windings eliminate third-order harmonic content of the AC
voltage waveform and provide the standardization desired for paralleling of generator sets. The standard excitation system is
a self (shunt) excited system with the voltage regulator powered directly from the generator set output.

Alternator Application Notes

Separately Excited Permanent Magnet Generator (PMG) System - This option uses an integral PMG to supply power to
the voltage regulator. A PMG system generally has better motor-starting performance, lower voltage dip upon load
application, and better immunity from problems with harmonics in the main alternator output induced by non-linear loads. This
option is recommended for use in applications that have large transient loads, sensitive electronic loads (especially UPS
applications), harmonic content, or that require sustained short-circuit current (sustained 3-phase short circuit current at
approximately 3 times rated for 10 seconds).
Alternator Sizes - On any given model, various alternator sizes are available to meet individual application needs. Alternator
sizes are differentiated by maximum winding temperature rise, at the generator set standby or prime rating, when operated in
a 40oC ambient environment. Available temperature rises range from 80oC to 150oC. Not all temperature rise selections are
available on all models. Lower temperature rise is accomplished using larger alternators at lower current density. Lower
temperature rise alternators have higher motor-starting kVA, lower voltage dip upon load application, and they are generally
recommended to limit voltage distortion and heating due to harmonics induced by non-linear loads.
Alternator Space Heater - is recommended to inhibit condensation.

Available Output Voltages

Three Phase Reconnectable Single Phase Non-Reconnectable Three Phase Non-Reconnectable
[ ] 120/208 [ ] 120/240 [ ] 220/380
[ ] 127/220 [ ] 347/600
[ ] 139/240
[ ] 120/240
[ ] 240/416
[ ] 254/440
[ ] 277/480

© 2004 Cummins NPower Specifications subject to change without notice CNP – 1350 (7-04)
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Specifications – Alternator

Design Brushless, 4-pole, drip-proof revolving field

Stator 2/3 pitch
Rotor Direct-coupled by flexible disc
Insulation System Class H per NEMA MG1-1.65
o
Standard Temperature Rise 125 C standby
Exciter Type PMG
Phase Rotation A (U), B (V), C (W)
Alternator Cooling Direct-drive centrifugal blower
AC Waveform Total Harmonic Distortion <5% total no load to full linear load
<3% for any single harmonic
Telephone Influence Factor (TIF) <50 per NEMA MG1-22.43.
Telephone Harmonic Factor (THF) <3

80°C Alternator 105°C Alternator 125°C Alternator

Voltage Ranges 110/190 347/600 110/190 347/600 110/190 120/208 277/480 347/600
The broad range thru thru Thru Thru
alternator can supply 139/240 139/240 139/240 139/240
single phase output up 220/380 220/380 220/380 240/416
to 2/3 of the set rated 3- Thru Thru Thru Thru
phase KW at 1.0 power 277/480 277/480 277/480 277/480
factor 120/240* 120/240 120/240* 120/240*

Motor Starting Broad Range 600 V Broad Range 600V Broad Range 480V 600V
Maximum kVA 1749 1372 1372 1210 1210 1210 1210
(90% Sustained
Voltage)
Alternator Data
Sheet Numbers 305 304 304 303 303 303 303
Full Load
Current 120/208 127/220 139/240 220/380 240/416 254/440 277/480 347/600
(Amps @ Standby
Rating) 1214 1148 1052 664 607 574 526 420

Notes:
1. The broad range alternators can supply single phase output up to 2/3 set rated 3-phase kW at 1.0 power factor.
2. The extended stack (full single phase output) and 4 lead alternators can supply single phase output up to full set rated 3-phase
kW at 1.0 power factor.

© 2004 Cummins NPower Specifications subject to change without notice CNP – 1350 (7-04)
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Control System
PowerCommand Control with AmpSentryTM Protection
• The PowerCommand Control is an integrated generator set control system providing governing,
voltage regulation, engine protection, and operator interface functions.
• PowerCommand Controls include integral AmpSentry protection. AmpSentry provides a full
range of alternator protection functions that are matched to the alternator provided.
• Controls provided include Battery monitoring and testing features, and Smart-Starting control
system.
• InPower PC-based service tool available for detailed diagnostics.
•
TM
Available with Echelon LonWorks network interface.
• NEMA 3R enclosure.
• Suitable for operation in ambient temperatures from -40C to +70C, and altitudes to 13,000 feet
(5000 meters).
• Prototype tested; UL, CSA, and CE compliant.
AmpSentry AC Protection Engine Protection Operator Interface
• Overcurrent and short circuit shutdown • Overspeed shutdown • OFF/MANUAL/AUTO mode switch
• Overcurrent warning • Low oil pressure warning and shutdown • MANUAL RUN/STOP switch
• Single & 3-phase fault regulation • High coolant temperature warning and • Panel lamp test switch
• Over and under voltage shutdown shutdown • Emergency Stop switch
• Over and under frequency shutdown • High oil temperature warning (optional) • Alpha-numeric display with pushbutton
• Overload warning with alarm contact • Low coolant level warning or shutdown access, for viewing engine and alternator
• Reverse power and reverse Var • Low coolant temperature warning data and providing setup, controls, and
shutdown • High and low battery voltage warning adjustments
• Excitation fault • Weak battery warning • LED lamps indicating genset running, not
• Dead battery shutdown in auto, common warning, common
• Fail to start (overcrank) shutdown shutdown
• Fail to crank shutdown • (5) configurable LED lamps
• Redundant start disconnect • LED Bargraph AC data display (optional)
• Cranking lockout
• Sensor failure indication
Alternator Data Engine Data Other Data
• Line-to-line and line-to-neutral AC volts • DC voltage • Genset model data
• 3-phase AC current • Lube oil pressure • Start attempts, starts, running hours
• Frequency • Coolant temperature • KW hours (total and since reset)
• Total and individual phase kW and • Lube oil temperature (optional) • Fault history
kVA • Load profile (hours less than 30% and
hours more than 90% load)
• System data display (optional with
network and other PowerCommand
gensets or transfer switches
Voltage Regulation Control Functions
• Integrated digital electronic voltage • Data logging on faults
regulator • Fault simulation (requires InPower)
• 3-phase line to neutral sensing • Time delay start and cooldown
• PMG (Optional) • Cycle cranking
• Single and three phase fault regulation • (4) Configurable customer inputs
• Configurable torque matching • (4) Configurable customer outputs
• (8) Configurable network inputs and (16)
outputs (with optional network)
Options
[] Power Transfer Control [] Key-type mode switch [] Echelon LonWorks interface
[] Analog AC Meter Display [] Ground fault module [] Digital input and output module(s) (loose)
[] Thermostatically Controlled Space [] Engine oil temperature [] Remote annunciator (loose)
Heater [] Auxiliary Relays (3)

© 2004 Cummins NPower Specifications subject to change without notice CNP – 1350 (7-04)
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Generator Set Options

Engine Exhaust System Generator Set
[ ] 120/240 V, W coolant heaters [ ] GenSet mounted muffler [ ] AC entrance box
[ ] 120/240 V, W lube oil heater [ ] Heavy duty exhaust elbow [ ] Batteries
[ ] Electronic governor [ ] Slip on exhaust connection [ ] Battery charger
[ ] Export box packaging
Cooling System [ ] Main line circuit breaker
[ ] Heat exchanger cooling [ ] PowerCommand Network
[ ] Remote radiator cooling Communication Module (NCM)
[ ] Stage 1 housing w/silencer
Fuel System [ ] Stage II housing w/silencer
[ ] Flexible fuel connector [ ] Remote annunciator panel
[ ] Fuel strainer [ ] Spring isolators
[ ] Dual fuel systems [ ] Weather protective enclosure with
Alternator silencer
[ ] 105oC rise alternator [ ] 2 year standby warranty
[ ] 125oC rise alternator [ ] 5 year basic power warranty
[ ] 120/240 V, 100 W anti-condensation
heater
[ ] Single phase

Available Products and Services

A wide range of products and services is available to match your power generation system requirements. Cummins Power
Generation products and services include:
• Diesel and Spark-Ignited Generator Sets
• Transfer Switches
• Bypass Switches
• Parallel Load Transfer Equipment
• Digital Paralleling Switchgear
• PowerCommand Network and Software
• Distributor Application Support
• Planned Maintenance Agreements

© 2004 Cummins NPower Specifications subject to change without notice CNP – 1350 (7-04)
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Warranty
All components and subsystems are covered by an express limited one-year warranty. Other optional and extended factory
warranties and local distributor maintenance agreements are available. Contact your distributor/dealer for more information.

Certifications

CSA - This generator is CSA certified to product class 4215-01.

PTS - The Prototype Test Support (PTS) program verifies the performance integrity of the generator set
design. Products bearing the PTS symbol have been subjected to demanding tests in accordance to
NFPA 110 to verify the design integrity and performance under both normal and abnormal operating
conditions including short circuit, endurance, temperature rise, torsional vibration, and transient
response, including full load pickup.

See your distributor for more information

Cummins NPower LLC

875 Lawrence Drive
DePere, WI 54115
920.337.9750
Fax: 920.337.9746
www.npower.cummins.com

Cummins and PowerCommand are registered trademarks of Cummins Inc.

AmpSentry is a trademark of Cummins Inc.
LonWorks is a registered trademark of Echelon

Important: Backfeed to a utility system can cause electrocution and/or property damage. Do not connect generator sets to any
building electrical system except through an approved device or after building main switch is open.

© 2004 Cummins NPower Specifications subject to change without notice CNP – 1350 (7-04)