Milton CAT G50LG User Manual

50kW

kW
kVA Telephone Influence Factor
Type Excitation Synchronous Speed
Connections Maximum Overspeed
Efficiency @ 1.0 Power Factor

208/240 480 Number of Bearings

20% Load

87.76 89.1 Insulation System

40% Load 88.26 89.6 Excitation System
60% Load

88.75 90.1

80% Load 88.65 90.0
100% Load 88.45 89.8
100% @ 0.8 PF 88.06 89.4

Subtransient Reactance p.u. 0.17 0.15
Transient Reactance 0.028 0.25
Synchronous Reactance 4.69 4.65 10% 15% 20% 25% 30% 35%
Negative Sequence Reactance

0.41 0.33 26 39 52 65 77 90

Zero Sequence Reactance 0.2 0.18 34 52 69 86 103 120
Short Circuit Ratio

0.38 0.38

Excitation Voltage 170 190
Excitation Current @ 50 kW 4.2 4.8
Lamination Type 390 390

Design and specifications are subject to change without notice.

Date 01/2010
Rev 1

Alternator Ratings (Series Wye Testing)

Machine Parameters @ Max kW Ratings

120 º

80 º

105 º

Temp Rise º C

Class H

<5%

Waveform Distortion

<50

1800 rpm

480

3300 rpm

1 Sealed Ball

Class H

50

kW Rating

Termperature
Rise is based
40º C Ambient

Temperature Rise vs Output (0.8 pf)

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

Voltage

Instantaneous Voltage Dip

208, 240

37
42

Machine Parameters Continued

50

62.5

Dir/Brusls

12 Lead

208/480v

ALTERNATOR DECREMENT CURVE

100

1000

0.010.1110100

Seconds

Amperes

Alt Damage
Internal Control shutdown
3-Ø Short Circuit Current
All data at 480 Volt Direct Exc

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.

© 2010 Caterpillar
All rights reserved.

Printed in U.S.A.