Caterpillar Generator Data
Page 1 of 9
GENERATOR DATA
FEBRUARY 16, 2016
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Selected Model
Engine: C18
Generator Frame: LC7024F
Genset Rating (kW): 550.0 Line Voltage: 480
Fuel: Diesel
Generator Arrangement: 4183919 Genset Rating (kVA): 687.5 Phase Voltage: 277
Frequency: 60
Excitation Type: AREP
Pwr. Factor: 0.8
Rated Current: 826.9
Duty: STANDBY Connection: SERIES STAR
Application: EPG
Status: Current
Version: 41764 /42186 /41431 /16700
Spec Information
Generator Specification
Generator Efficiency
Frame: LC7024F Type: LC
No. of Bearings: 1
Per Unit Load
kW
Efficiency %
Winding Type: RANDOM WOUND Flywheel: 14.0
0.25
137.5
91.0
Connection: SERIES STAR
Housing: 1
0.5
275.0
93.6
Phases: 3
No. of Leads: 12
0.75
412.5
94.0
Poles: 4
Wires per Lead: 2
1.0
550.0
93.8
Sync Speed: 1800
Generator Pitch: 0.6667
Reactances
Per Unit
Ohms
SUBTRANSIENT - DIRECT AXIS X''d
0.1307
0.0438
SUBTRANSIENT - QUADRATURE AXIS X''q
0.1552
0.0520
TRANSIENT - SATURATED X'd
0.1647
0.0552
SYNCHRONOUS - DIRECT AXIS Xd
3.1689
1.0620
SYNCHRONOUS - QUADRATURE AXIS Xq
1.9014
0.6372
NEGATIVE SEQUENCE X2
0.1432
0.0480
ZERO SEQUENCE X0
0.0095
0.0032
Time Constants
OPEN CIRCUIT TRANSIENT - DIRECT AXIS T'd0
1.9290
SHORT CIRCUIT TRANSIENT - DIRECT AXIS T'd
0.1000
OPEN CIRCUIT SUBSTRANSIENT - DIRECT AXIS T''d0
0.0130
SHORT CIRCUIT SUBSTRANSIENT - DIRECT AXIS T''d
0.0100
OPEN CIRCUIT SUBSTRANSIENT - QUADRATURE AXIS T''q0
0.1220
SHORT CIRCUIT SUBSTRANSIENT - QUADRATURE AXIS T''q
0.0100
EXCITER TIME CONSTANT Te
0.0300
ARMATURE SHORT CIRCUIT Ta
0.0150
Short Circuit Ratio: 0.39
Voltage Regulation
Stator Resistance = 0.0102 Ohms
Seconds
Field Resistance = 0.325 Ohms
Generator Excitation
Voltage level adustment: +/5.0%
0.5%
Voltage regulation, steady state: +/Voltage regulation with 3% speed change: +/0.5% Excitation voltage:
Waveform deviation line - line, no load: less than 2.0% Excitation current
Telephone influence factor: less than
50
No Load
10.8 Volts
0.9 Amps
Full Load, (rated) pf
Series
Parallel
48.37 Volts
Volts
3.32 Amps
Amps
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Caterpillar Generator Data
Page 2 of 9
Selected Model
Engine: C18
Generator Frame: LC7024F
Genset Rating (kW): 550.0 Line Voltage: 480
Fuel: Diesel
Generator Arrangement: 4183919 Genset Rating (kVA): 687.5 Phase Voltage: 277
Frequency: 60
Excitation Type: AREP
Pwr. Factor: 0.8
Rated Current: 826.9
Duty: STANDBY Connection: SERIES STAR
Application: EPG
Status: Current
Version: 41764 /42186 /41431 /16700
Generator Mechanical Information
Center of Gravity
Dimension X -630.0 mm -24.8 IN.
z
z
z
Dimension Y 0.0 mm
0.0 IN.
Dimension Z 0.0 mm
0.0 IN.
"X" is measured from driven end of generator and parallel to rotor. Towards
engine fan is positive. See General Information for details
"Y" is measured vertically from rotor center line. Up is positive.
"Z" is measured to left and right of rotor center line. To the right is positive.
Generator WT = 1405 kg * Rotor WT = 520 kg * Stator WT = 885 kg
3,097 LB
1,146 LB
1,951 LB
Rotor Balance = 0.0508 mm deflection PTP
Overspeed Capacity = 125% of synchronous speed
Generator Torsional Data
J1 = Coupling
J2 = Rotor
J3 = Exciter
and Fan
TOTAL J = J1 + J2 + J3
End
K1 = Shaft Stiffness between
K2 = Shaft Stiffness between
J1 + J2 (Diameter 1)
J2 + J3 (Diameter 2)
J1
K1
2
7.6 LB IN. s 77.8 MLB IN./rad
0.86 N m s2
8.79 MN m/rad
Min Shaft Dia 1
5.7 IN.
145.0 mm
J2
K2
2
60.9 LB IN. s 75.6 MLB IN./rad
6.88 N m s2
Total J
8.54 MN m/rad
Min Shaft Dia 2
J3
5.5 IN.
3.3 LB IN. s2
140.0 mm
0.37 N m s2
71.8 LB IN. s2
8.11 N m s2
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Caterpillar Generator Data
Page 3 of 9
Selected Model
Engine: C18
Generator Frame: LC7024F
Genset Rating (kW): 550.0 Line Voltage: 480
Fuel: Diesel
Generator Arrangement: 4183919 Genset Rating (kVA): 687.5 Phase Voltage: 277
Frequency: 60
Excitation Type: AREP
Pwr. Factor: 0.8
Rated Current: 826.9
Duty: STANDBY Connection: SERIES STAR
Application: EPG
Status: Current
Version: 41764 /42186 /41431 /16700
Generator Cooling Requirements Temperature - Insulation Data
Temperature Data: (Ambient 40 0C)
Heat Dissipated: 36.4 kW
Stator Rise:
130.0 0C
Air Flow:
Rotor Rise:
72.0 m3/min
130.0 0C
Insulation Class: H
Insulation Reg. as shipped: 100.0 MΩ minimum at 40 0C
Cooling Requirements:
Thermal Limits of Generator
Frequency:
60 Hz
Line to Line Voltage: 480 Volts
B BR 80/40
596.0 kVA
F BR -105/40
677.95 kVA
H BR - 125/40
745.0 kVA
F PR - 130/40
745.0 kVA
H PR - 150/40
789.7 kVA
H PR27 - 163/27
819.5 kVA
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Caterpillar Generator Data
Page 4 of 9
Selected Model
Engine: C18
Generator Frame: LC7024F
Genset Rating (kW): 550.0 Line Voltage: 480
Fuel: Diesel
Generator Arrangement: 4183919 Genset Rating (kVA): 687.5 Phase Voltage: 277
Frequency: 60
Excitation Type: AREP
Pwr. Factor: 0.8
Rated Current: 826.9
Duty: STANDBY Connection: SERIES STAR
Application: EPG
Status: Current
Version: 41764 /42186 /41431 /16700
Starting Capability & Current Decrement
Motor Starting Capability (0.6 pf)
SKVA
Percent
Volt Dip
98
2.5
201
5.0
309
7.5
423
10.0
544
12.5
672
15.0
808
17.5
953
20.0
1,106
22.5
1,270
25.0
1,445
27.5
1,633
30.0
1,835
32.5
2,052
35.0
2,286
37.5
2,541
40.0
Current Decrement Data
E Time
Cycle
AMP
0.0
6,298
1.0
4,546
2.0
3,735
3.0
3,181
4.0
2,736
5.0
2,365
7.5
2,169
10.0
2,528
12.5
2,780
15.0
2,951
20.0
2,913
25.0
2,753
30.0
2,673
35.0
2,651
40.0
2,653
45.0
2,662
Instantaneous 3 Phase Fault Current: 6298 Amps
Instantaneous Line - Line Fault Current: 5205 Amps
Instantaneous Line - Neutral Fault Current: 8707 Amps
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Caterpillar Generator Data
Page 5 of 9
Selected Model
Engine: C18
Generator Frame: LC7024F
Genset Rating (kW): 550.0 Line Voltage: 480
Fuel: Diesel
Generator Arrangement: 4183919 Genset Rating (kVA): 687.5 Phase Voltage: 277
Frequency: 60
Excitation Type: AREP
Pwr. Factor: 0.8
Rated Current: 826.9
Duty: STANDBY Connection: SERIES STAR
Application: EPG
Status: Current
Version: 41764 /42186 /41431 /16700
Generator Output Characteristic Curves
Open Circuit Curve
Field
Current
Line Line Volt
0.0
0
17.9
288
21.2
336
25.0
384
29.8
432
37.4
480
51.5
528
81.3
576
149.2
624
309.3
672
Short Circuit Curve
Field
Current
Armature
Current
0.0
0
56.4
496
65.9
579
75.3
662
84.7
744
94.1
827
103.5
910
112.9
992
122.3
1,075
131.7
1,158
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Caterpillar Generator Data
Page 6 of 9
Selected Model
Engine: C18
Generator Frame: LC7024F
Genset Rating (kW): 550.0 Line Voltage: 480
Fuel: Diesel
Generator Arrangement: 4183919 Genset Rating (kVA): 687.5 Phase Voltage: 277
Frequency: 60
Excitation Type: AREP
Pwr. Factor: 0.8
Rated Current: 826.9
Duty: STANDBY Connection: SERIES STAR
Application: EPG
Status: Current
Version: 41764 /42186 /41431 /16700
Generator Output Characteristic Curves
Zero Power Factor Curve
Field
Current
Line Line Volt
94.1
0
112.4
240
115.8
288
119.7
336
124.9
384
133.3
432
149.5
480
184.4
528
264.7
576
454.5
624
Air Gap Curve
Field
Current
Line Line Volt
0.0
0
17.7
288
20.7
336
23.6
384
26.6
432
29.5
480
32.5
528
35.4
576
38.4
624
41.3
672
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Caterpillar Generator Data
Page 7 of 9
Selected Model
Engine: C18
Generator Frame: LC7024F
Genset Rating (kW): 550.0 Line Voltage: 480
Fuel: Diesel
Generator Arrangement: 4183919 Genset Rating (kVA): 687.5 Phase Voltage: 277
Frequency: 60
Excitation Type: AREP
Pwr. Factor: 0.8
Rated Current: 826.9
Duty: STANDBY Connection: SERIES STAR
Application: EPG
Status: Current
Version: 41764 /42186 /41431 /16700
Reactive Capability Curve
Click to view Chart
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Caterpillar Generator Data
Page 8 of 9
Selected Model
Engine: C18
Generator Frame: LC7024F
Genset Rating (kW): 550.0 Line Voltage: 480
Fuel: Diesel
Generator Arrangement: 4183919 Genset Rating (kVA): 687.5 Phase Voltage: 277
Frequency: 60
Excitation Type: AREP
Pwr. Factor: 0.8
Rated Current: 826.9
Duty: STANDBY Connection: SERIES STAR
Application: EPG
Status: Current
Version: 41764 /42186 /41431 /16700
General Information
GENERATOR INFORMATION (DM7809)
------------------------------------------------------------Coastal Insulation Protection - System 4
1.Motor Starting
Motor starting curves are obtained in accordance with IEC60034, and
are displayed at 0.6 power factor.
2.Voltage Dip
Prediction of the generator synchronous voltage dip can be made by
consulting the plot for the voltage dip value that corresponds to the
desired motor starting kVA value.
3.Definitions
A)Generator Keys
Frame: abbreviation of generator frame size
Freq: frequency in hertz.
PP/SB: prime/standby duty respectively
Volts: line - line terminal voltage
kW: rating in electrical kilo watts
Model: engine sales model
B)Generator Temperature Rise
The indicated temperature rises are the IEC/NEMA limits for standby or
prime power applications. The quoted rise figures are maximum limits
only and are not necessarily indicative of the actual temperature rise
of a given machine winding.
C)Centre of Gravity
The specified centre of gravity is for the generator only. For single
bearing, and two bearing close coupled generators, the center of gravi
ty is measured from the generator/engine flywheel-housing interface an
d from the centreline of the rotor shaft.
For two bearing, standalone generators, the center of gravity is measu
red from the end of the rotor shaft and from the centerline of the rot
or shaft.
D)Generator Current Decrement Curves
The generator current decrement curve indicates the generator armature
current arising from a symmetrical three-phase fault at the generator
terminals. Generators equipped with AREP or PMG excitation systems wi
ll sustain 300% of rated armature current for 10 seconds.
E)Generator Efficiency Curves
The efficiency curve is displayed for the generator only under the giv
en conditions of rating, voltage, frequency and power factor. This is
not the overall generating set efficiency curve.
Caterpillar Confidential: Green
Content Owner: Commercial Processes Division
Web Master(s): PSG Web Based Systems Support
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Caterpillar Generator Data
Page 9 of 9
Current Date: Tuesday, February 16, 2016 10:44:22 AM
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