Milton CAT G275LG 275kW_344kVA Alternator Data - Manual

G275LG
Alternator Data
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, OLYMPIAN, their respective logos and ''Caterpillar Yellow'', 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.
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 88.45 89.8 Insulation System
40% Load 88.65 90.0 Excitation System
60% Load 88.85 90.2
80% Load 89.14 90.5
100% Load 89.34 90.7
100% @ 0.8 PF 88.65 90.0 230
250
275
Subtransient Reactance p.u. 0.15
Transient Reactance 0.21
Synchronous Reactance 2.05 10% 15% 20% 25% 30% 35%
Negative Sequence Reactance 0.24 227 341 454 568 681 794
Zero Sequence Reactance 0.09 303 454 605 757 908 1059
Short Circuit Ratio 0.28
Excitation Voltage 175
Excitation Current @ Rated kW 4.5A
Lamination Type 520
Machine Parameters Continued
275
343.75
Brushless/PMG
12 Lead
600
Antifungal Coating
Temperature
Rise is based
40º C Ambient
Temperature Rise vs Output (0.8 pf)
Options - - - - - - - - - - - -
Voltage
Instantaneous Voltage Dip
208, 240
480
3300 rpm
1 Sealed Ball
Class H
Alternator Heater
<5% Waveform Distortion
<50
1800 rpm
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
106
80 º
90 º
Temp Rise º C
Class H
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
LEHF0091-00 (11/09)
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