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GENERATOR PRODUCTS

GE Energy

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The Power of Technology, Experience and Innovation

The world demands a reliable supply of clean, dependable power. GE offers a wide array of technological

options to meet the most challenging energy requirements. Using an integrated approach that includes

parts, service, repair and project management, we deliver results that contribute to our customers’

success. And our reputation for excellence can be seen in everything we do.


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GE ENERGYGENERATOR PRODUCTS

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Generator Technology

Air-Cooled Generators

Hydrogen-Cooled Generators

Water-Cooled Generators

Control and Excitation Systems

Generator Reliability

Reference Guide — Product Overview


World-Class Technology for the Widest Range of Applications

With more than 14,000 generators shipped and over 100 years of experience, GE Energy is a world leader

in generator technology. Whether the application calls for powering a city on the Pacific Rim, a water

desalination plant in the Middle East or an industrial cogeneration facility in Europe, GE can deliver. Power

generation professionals around the globe have come to rely on GE generators for their high efficiency and

exceptional reliability—as well as quick, simple installation and minimal maintenance costs—to ultimately

provide a lower cost of producing electricity.

GE generators may be driven by steam, heavy-duty gas, or aeroderivative gas turbines and are matched

to the turbine to create an optimum system. World-class generator engineers and scientists from GE Energy,

GE Global Research and GE Transportation combine their extensive experience with state-of-the-art

analytical tools, Six Sigma methodology and advanced material development to deliver evolutionary and

revolutionary designs.

Our extensive customer experience is a key element in shaping the technology, products and services

that we deliver. Our customers count on us to provide generators that contribute to their profitability and

success. GE takes a customer-centric approach, working with customers to identify the factors that impact

their operating results. We incorporate these inputs into all aspects of the generator product life cycle

including design, installation, operation, aftermarket services and product upgrades. We are committed

to our customers’ success.

Generator Technology

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KOWEPCO’s Seoinchon

and KOSPO’s Shininchon

combined cycle power

plants in Korea produce

a total of 4,000 MW of

electricity.

Six GE 7FH2 generators

with a total capacity of

1200 MW are readied for

customer shipment.

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GE engineers combine

advanced analytical tools with

Six Sigma process quality

during generator design.

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Simplicity and Flexibility

GE’s air-cooled generators are an ideal choice for power

system applications that demand simplicity and flexibility

of operation.

Air-cooled generators operate with either an open-loop or

a closed-loop cooling system. Under the open-loop system,

the generator draws air from the atmosphere to cool its

active components, then it exhausts the air back into the

atmosphere. Under the closed-loop system, cooling air is

recirculated continuously through the generator while

air-to-water heat exchangers remove heat from the air.

Air-Cooled Generators

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Typical Product Characteristics

5A4

6A6

6A8

7A6

9A4

5A4

6A6

6A8

7A6

9A4

Series Output (MVA) Excitation

50 H

z

35

50

60

105

190

35

50

65

115

145

Voltage (kV)

11.5

11.5

11.5

11.5

11.5-15.75

13.8

13.8

13.8

13.8

13.8

Brushless Static Static Start

60 H

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A GE air-cooled generator driven by a GE

frame 6B gas turbine produces reliable power

at Electroandina’s plant in Tocopilla, Chile.

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During operation, an air-cooled generator can be load cycled freely, and it is well suited to peaking duty.

Because of the absence of a pressurized atmosphere within the generator, its structural components are

simple and easy to handle, which facilitates routine maintenance.

The potential for severe corona discharge damage is a challenge to the design of air-cooled generators.

GE uses well-proven systems of insulating and voltage-grading materials to ensure freedom from damaging

corona activity.

GE air-cooled generators are fully assembled before they are shipped,

limiting on-site assembly to placement on the foundation,

alignment with the turbine and connection to balance of

plant equipment. The resulting reduction in construction

time represents a direct cost saving to the customer.

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Here, Micapal™ insulation is being applied

to an indirect cooled armature bar.

Stator for a GE 7A6

air-cooled generator.

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Hydrogen-Cooled Generators

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Highly Efficient and Reliable

Hydrogen’s three outstanding properties, low density, high specific heat, and thermal conductivity, make it

a superior coolant for rotating electrical machines. Hydrogen lends itself to a compact, highly efficient,

reliable design. Hydrogen gas is circulated in a closed loop within the generator to remove heat from its

active parts, then it is cooled by gas-to-water heat exchangers that are part of the stator frame. The frame

is tightly sealed to prevent gas leakage, and oil seals are installed on the shaft at each end of the stator to

prevent leakage as the shaft emerges from the stator frame.

The hydrogen-cooled generator’s interior is completely sealed

from the atmosphere, so dust, humidity, salt or chemicals have

no effect on the machine. The absence of oxygen in its cooling

gas means the generator’s high-voltage insulation system will

not be damaged by any corona activity in the generator’s stator

windings. This is a significant factor in the machine’s reliability.

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GE offers generator designs suitable for base

mount or pedestal mount applications.

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Series Voltage (kV) Output (MVA) Static StartStatic Excitation

50 H

z60

Hz

✓

✓

✓ ✓

✓

✓ ✓

✓ ✓

7FH2 15 240

324 15.75 360

330H 17 410

390H 19 470

450H 19 530

✓

✓ ✓

✓

✓ ✓

7FH2 18 270

324 18 420

390H 22 480

GE’s advances in analytical

physics-based modeling,

including computational fluid

dynamics (CFD) and extensive

finite element analysis,

lead to robust designs and

effective use of materials.

By combining design analysis

with comprehensive machine

testing programs, we prove

machine performance and

provide physical validation of

the high-fidelity engineering

tools used in contemporary

generator design.

Velocity vectorscolored by magnitude.

The Sarlux Integrated Gasification Combined

Cycle (IGCC) Plant in Sarroch, Sardinia utilizes

GE hydrogen-cooled generators in STAG™

109E single shaft configuration.

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Water-Cooled Generators

GE water-cooled generators are exceptionally well suited to central station applications where output

requirements exceed the cooling capabilities of air-cooled or hydrogen-cooled designs.

Cool, deionized water, supplied by a closed-loop auxiliary system, flows through hollow copper strands

located in the stator winding, then the warm water is discharged at the turbine end of the generator.

The GE water-cooled generator’s performance is heightened by optimization of its bar strand configuration,

including hollow-to-solid-strand ratio. Enhancements in stator bar insulation construction and chemistry

provide further improvements in the design of new and refurbished liquid-cooled stator windings.

Because high-output machines are so important to the overall stability of the grid, reliability is a primary

requirement for water-cooled generators. GE continues to improve their performance while maintaining

their high reliability. Stator frames are designed for low vibration using advanced finite element analysis.

Fan efficiency is improved to reduce losses and increase output. Thermal fluid-flow techniques are used

to improve the overall performance of the field winding.

GE continues to develop the technology to meet our customers’ demand for reliable, efficient,

cost-effective machines.

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Number of Poles Voltage Range (kV) Output Range (MVA) Static StartStatic Excitation

50 H

z60

Hz

2 20 - 23 400 - 1050

4 20 - 27 500 - 1540

2 20 - 28 400 - 1120

4 20 - 26 450 - 1600

The generator design process

incorporates the use of

smart 3D parametric model

assemblies that embed all

of the applicable engineering

design rules. A common

model can be used to perform

multidisciplinary analyses

ranging from structural to

ventilation to heat transfer.

Upon completion of the

analyses, manufacturing

drawings are automatically

created, resulting in improved

design cycle and higher

overall product quality.

A GE water-cooled generator is driven by a GE G-Series steam

turbine at the Dezhou Phase III Plant in China.

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A power system requires a control system that integrates component functions to maximize overall perform-

ance and availability. GE’s latest generation of fully integrated control systems provide our customers with the

ability to operate a power plant on a single platform, which leads to complete system ownership.

GE’s continually evolutionary designs create the flexibility to meet all our customers’ engineering and

maintenance needs. Our control systems extend increased productivity to our customers by furnishing a

common operator interface, tools that improve efficiency and require fewer operators, peer-

to-peer communication link controllers for coordinated plant operation, simplified plant

data acquisition and performance evaluation, less spare parts, reduced training costs and

minimized forced outages.

GE’s turbine control products cover steam, gas and aeroderivative applications to give

our customers the control, efficiency and availability they’ve come to expect from a

GE product.

Control and Excitation Systems

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Generator Reliability

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A Full Scope of Services to Meet Your Operational Needs

The changing demands of the highly competitive power generation business present a constant challenge

to generator operators. GE, a leader in generator technology, has the knowledge, resources and experience

to help our customers keep their generators in top condition to meet today’s—and tomorrow’s—challenges.

GE’s Generator Reliability Program offers proactive fleet monitoring and diagnostics to help prevent problems,

which, in turn, will minimize total cost of ownership. The program will help improve fleet reliability and availability,

cut future maintenance and repair costs, and extend inspection intervals. Incorporating an entire generator fleet

into the program allows a full scope of services to meet operational needs. Under the program, a team of

specialists will evaluate a generator fleet and assess its requirements. They will develop a customized, fleetwide

maintenance plan designed to reduce operating costs and increase fleet availability. GE’s Generator Reliability

Program presents a full scope of services to meet our customers’ operational needs.


Reference Guide — Product Overview

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• Full range of generators available for steam turbine drive.

9FB GT 50 330H

9FA GT 50 324

7FB GT 60 7FH2

7FA GT 60 7FH2

9E GT 50 9A4

7EA GT 60 7A6

6FA GT 50/60 7A6

LM6000 GT 50/60 6A8

6C GT 50/60 6A8

6B GT 50/60 6A6

GT Model

Generator Applications for Gas Turbine Drive

Frequency (Hz) Generator Series

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S109FA 50 390H

S107FA 60 324

S106FA 50/60 9A4

S109FB 50 450H

S107FB 60 324

STAG™ Configuration

Generator Applications for Single Shaft Combined Cycle Systems


S209FA 50 324

S209FB 50 330H

S207FA 60 7FH2H/324

S207FB 50 7FH2

S109FB 50 9A4

S109FA 50 9A4

S107FA 60 7A6/9A4

S106FA 50/60 6A6

S206FA 50/60 7A6

S107FB 60 9A4

S109E 50 7A6

S209E 50 9A4

S107EA 60 6A8

S207EA 60 7A6

S206B 50/60 6A6

S406B 50/60 9A4

S206C 50/60 6A8

STAG™

Configuration

Generator Applications for Combined Cycle Steam Turbines


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Generator Output Range for Various Cooling Media

Generator Output Range (MVA)

Hydrogen-Cooled

Air-Cooled

Water-Cooled

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GE Value

GE is a leading global supplier of power generation technology, energy services and management

systems, with an installed base of power generation equipment in more than 120 countries.

GE Energy provides innovative, technology-based products and service solutions across the full

spectrum of the energy industry.

Our people, products and services provide enhanced performance, competitive life cycle costs

and continuous technological innovation with unmatched experience. Our Customer-Centric

approach, combined with Six Sigma quality methodology, assures that customer needs

are defined up front and that performance against customer expectations is measured and

managed every step of the way.

Industries Served:■ Commercial and industrial

power generation

■ Distributed power

■ Energy management

■ Oil & Gas

■ Petrochemical

■ Gas compression

■ Commercial marine power

■ Energy rentals

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GE Energy

4200 Wildwood ParkwayAtlanta, GA 30339P: 678.844.6000

gepower.com

GEA 13489A (05/05)


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