Apr 24, 2014
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Natural Gas Generator Set provides power independent of grid.

August 11, 2008 - Driven by electronically controlled, reciprocating Cat engine, G3516C can operate on pipeline natural gas. Electrical efficiency is up to 40.4% at 50 Hz and system operates at 1,500 rpm with continuous rating of 1,944 kVA, with standard NOx emissions rating of 500 mg/NM3 at 50 Hz. Open combustion chamber design can operate down to 1.5 psi and gas engine control module regulates ignition, engine governing, and air-to-fuel ratio.

(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
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Caterpillar Now Offers G3516C 50 Hz Natural Gas Generator Set for Island Mode Operation

Caterpillar, Inc., Engine Div.
P.O. Box 610
Mossville, IL, 61552 0610, USA

PEORIA, IL - Caterpillar Inc. today announces the introduction of a new G3516C 50 Hz
high-efficiency natural gas generator set available now with optional air and fuel system controls specifically designed for island mode applications.

The G3516C 50 Hz generator set equipped with the island mode control system generates
power independently from the power grid with a high-efficiency, natural gas-fueled engine for commercial and institutional customers who require exceptionally reliable, high-quality electric power.

Earlier this year, Caterpillar launched G3520C generator sets capable of island mode
operation rated at 50 Hz and 60 Hz. This new G3516C 50 Hz generator set helps to meet market demand by expanding the range of unit ratings available to customers, allowing them to select the most economical system configuration for their on-site power profiles.

"An increasing number of customers - especially those in critical manufacturing or
remote locations - have evaluated their overall energy needs and determined that island mode operation should be an essential element of their on-site power generation capabilities," said John A. Fisher, Electric Power Sales Development Manager at Caterpillar. "On-site generator sets must be able to withstand load fluctuations with relatively small frequency and voltage deviations, and the new G3516C 50 Hz gas generator set with enhanced air and fuel system controls provides superior island mode operation capability."

Cat® natural gas generator sets with the island mode feature tackle the major barriers for distributed generation in stand-alone applications where a utility grid connection is unavailable or the utility grid is not stable. The improved transient capability also supports the use of low-emission gas generator sets in standby power applications, providing customers with more clean energy options for their electric power supply solutions.

Driven by an electronically controlled, lean-burn gaseous-fueled reciprocating Cat engine, the G3516C generator set was designed to offer a high power density and excellent fuel efficiency while maintaining tight NOx control. It provides the flexibility to operate on pipeline natural gas with the same Methane Number range as Caterpillar's current natural gas packages and delivers an ISO electrical efficiency of up to 40.4 percent at 50 Hz - even with the use of two engine-driven water pumps.

The Cat G3516C generator set operates at 50 Hz/1,500 rpm with a continuous rating of
1,944 kVA (1,555 ekW). It has a standard NOx emissions rating of 500mg/NM3 at 50 Hz, with performance of 250mg/NM3 at 50 Hz available through a 54° C separate circuit aftercooler (SCAC) system that can be used with a conventional cooling system arrangement in almost all geographic locations. The G3516C is built on a heavy-duty, diesel-based, bottom-end platform for superior durability with a unique top-end design for gas application optimization. It also features an open combustion chamber design capable of operating at pressures as low as 1.5 psi (10.3 kPa).

Standard on the G3516C generator set is a digital microprocessor Gas Engine Control
Module, which automatically and precisely regulates ignition, engine governing and air-to-fuel ratio for optimum fuel economy. Its technologically advanced air-to-fuel ratio control monitors charge air density and maintains stringent NOx control under a variety of ambient and load conditions. The G3516C features an individual-cylinder detonation sensing and timing control, with a prechamber-type spark plug design for extended service life without adjustment.

The Cat® G3516C generator set is easily tailored to specific applications with a wide
selection of Cat SR4B generators and generator set attachments, including oversized generators. Additional features include exhaust options, circuit breakers, alarm and remote annunciator modules, and battery chargers.

Caterpillar is helping to lead the power generation marketplace with power systems
engineered to deliver unmatched flexibility, expandability, reliability and cost-effectiveness. The company offers worldwide product support, with parts and service available globally through the Caterpillar® service and dealer network. In addition, dealer service technicians are trained to service every aspect of Cat equipment.

For more than 80 years, Caterpillar Inc. has been making progress possible and driving
positive and sustainable change on every continent. With 2007 sales and revenues of $44.958 billion, Caterpillar is the world's leading manufacturer of construction and mining equipment, diesel and natural gas engines and industrial gas turbines. The company also is a leading services provider through Caterpillar Financial Services, Caterpillar Remanufacturing Services, Caterpillar Logistics Services and Progress Rail Services. More information is available at http://www.cat.com/.

For more information on Cat generator sets and continuous power systems, or to find the
local Cat dealer nearest you, please visit us on the web at www.cat-electricpower.com or e-mail cat_power cat.com. For a specification sheet on the Cat G3516C 50 Hz natural gas generator set with island mode or for a Cat dealer to contact you, visit http://go.cateps.com/pr.

CAT, CATERPILLAR, their respective logos, "Caterpillar Yellow" and the POWER EDGE trade dress, as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.

© 2008 Caterpillar Inc.

All rights reserved.

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