Milton CAT G250LG4 250kW_313kVA Alternator Data - Manual

G250LG
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 89.34 90.7 Excitation System
60% Load 89.64 91
80% Load 89.73 91.1
100% Load 89.54 90.9
100% @ 0.8 PF 88.75 90.1 191
229
250
Subtransient Reactance p.u. 0.14
Transient Reactance 0.23
Synchronous Reactance 2.05 10% 15% 20% 25% 30% 35%
Negative Sequence Reactance 0.26 197 296 395 494 593 692
Zero Sequence Reactance 0.09 263 395 527 658 790 922
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 2
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
250
312.5
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
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Materials and specifications are subject to change without notice.
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Printed in U.S.A. LEHF0052-01 (10/09)