Milton CAT G25LTA 25 kW Performance Data: Alternator Data G25LTA - Manual

G25LTA
Alternator Data
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Discretion is recommended when distributing.
Materials and specifications are subject to change without notice.
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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 87.07 88.4 Insulation System
40% Load 87.96 89.3 Excitation System
60% Load 88.55 89.9
80% Load 88.45 89.8
100% Load 88.35 89.7
100% @ 0.8 PF 88.85 90.2 19
23
25
Subtransient Reactance p.u. 0.16
Transient Reactance 0.27
Synchronous Reactance 2.85 10% 15% 20% 25% 30% 35%
Negative Sequence Reactance 0.28 12 19 25 31 37 43
Zero Sequence Reactance 0.10 16 25 33 41 49 57
Short Circuit Ratio 0.33
Excitation Voltage 190
Excitation Current @ Rated kW 4.5A
Lamination Type 390
Machine Parameters Continued
25
31.25
Brushless
4 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 1
Alternator Ratings (Series Wye Testing)
Machine Parameters @ Max kW Ratings
kW Rating
120 º
80 º
105 º
Temp Rise º C
Class H
ALTERNATOR DECREMENT CURVE
10
100
1000
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
LEHF0073-00 (07/09)