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Milton CAT G300LG 300kW_375kVA Alternator Data User Manual

G300lg, Alternator data, Alternator decrement curve

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G300LG

Alternator Data

kW
kVA

Telephone Influence Factor

Type

Synchronous Speed

Connections

Maximum Overspeed

Efficiency @ 1.0 Power Factor

208/240

480/600

Number of Bearings

20% Load

88.55 89.9

Insulation System

40% Load

88.75 90.1

Excitation System

60% Load

88.95 90.3

80% Load

89.24 90.6

100% Load

89.44 90.8

100% @ 0.8 PF

88.75 90.1

229
275
300

Subtransient Reactance p.u.

0.16

Transient Reactance

0.21

Synchronous Reactance

2.05

10% 15% 20% 25% 30% 35%

Negative Sequence Reactance

0.26

227

341

454

568

681

794

Zero Sequence Reactance

0.1

303

454

605

757

908 1059

Short Circuit Ratio

0.28

Excitation Voltage

190

Excitation Current @ Rated kW

5.0A

Lamination Type

520

Design and specifications are subject to change without notice.

Date 06-2009

Rev 0

Alternator Ratings

(Series Wye Testing)

Machine Parameters @ Max kW Ratings

kW Rating

120 º

80 º

105 º

Temp Rise º C

Class H

1 Sealed Ball

Class H

Alternator Heater

<5%

Waveform Distortion

<50

1800 rpm

Temperature

Rise is based

40º C Ambient

Temperature Rise vs Output (0.8 pf)

Options - - - - - - - - - - - -

Voltage

Instantaneous Voltage Dip

208, 240

480

3300 rpm

Machine Parameters Continued

300
375

Brushless/PMG

12 Lead

600

Antifungal Coating

ALTERNATOR DECREMENT CURVE

10

100

1000

10000

0.01

0.1

1

10

100

Seconds

A

m

pe

re

s

Alt Damage

3-Ø Short Circuit Current

All data at 480 volt

PMG

Cutoff

Information contained in this publication may be considered confidential. Discretion is recommended when distributing.

Materials and specifications are subject to change without notice.

CAT, CATERPILLAR, their respective logos, OLYMPIAN, “Caterpillar Yellow,” 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.

www.CAT-ElectricPower.com

© 2009 Caterpillar

All rights reserved.

Printed in U.S.A.

LEHF0053-01 (10/09)