Caterpillar Generator Data SR5

21/5/2021 Caterpillar Generator Data
G D M 21, 2021
(1GZ06823)-E (G2N00161)-G (YAY00610)-G For Help Desk Phone Numbers Click here
Selected Model
Engine: 3512 Generator Frame: 1622 Genset Rating (kW): 1360.0 Line Voltage: 480
Fuel: Diesel Generator Arrangement: 2523932 Genset Rating (kVA): 1511.0 Phase Voltage: 277
Frequency: 60 Excitation Type: Permanent Magnet Pwr. Factor: 0.9 Rated Current: 1817.5
Duty: PRIME Connection: SERIES STAR Application: EPG Status: Current
Version: 41205 /40304 /38531 /4246
Spec Information
Generator Specification Generator Efficiency
Frame: 1622 Type: SR5 No. of Bearings: 1 Per Unit Load kW Efficiency %
Winding Type: FORM WOUND Flywheel: 21.0 0.25 340.0 90.5
Connection: SERIES STAR Housing: 00 0.5 680.0 93.7
Phases: 3 No. of Leads: 6 0.75 1020.0 95.0
Poles: 4 Wires per Lead: 4 1.0 1360.0 95.4
Sync Speed: 1800 Generator Pitch: 0.6667 1.1 1496.0 95.4
Reactances Per Unit Ohms

SUBTRANSIENT - DIRECT AXIS X''d 0.0971 0.0148
SUBTRANSIENT - QUADRATURE AXIS X''q 0.1213 0.0185
TRANSIENT - SATURATED X'd 0.1600 0.0244
SYNCHRONOUS - DIRECT AXIS Xd 1.6370 0.2496
SYNCHRONOUS - QUADRATURE AXIS Xq 0.9825 0.1498
NEGATIVE SEQUENCE X2 0.1089 0.0166
ZERO SEQUENCE X0 0.0230 0.0035
Time Constants Seconds

OPEN CIRCUIT TRANSIENT - DIRECT AXIS T'd0 1.6600
SHORT CIRCUIT TRANSIENT - DIRECT AXIS T'd 0.1910
OPEN CIRCUIT SUBSTRANSIENT - DIRECT AXIS T''d0 0.0200
SHORT CIRCUIT SUBSTRANSIENT - DIRECT AXIS T''d 0.0120
OPEN CIRCUIT SUBSTRANSIENT - QUADRATURE AXIS T''q0 0.0760
SHORT CIRCUIT SUBSTRANSIENT - QUADRATURE AXIS T''q 0.0110
EXCITER TIME CONSTANT Te 0.0940
ARMATURE SHORT CIRCUIT Ta 0.0300
Short Circuit Ratio: 0.71 Stator Resistance = 0.0024 Ohms Field Resistance = 0.42 Ohms
Voltage Regulation Generator Excitation
Voltage level adjustment: +/- 5.0% No Load Full Load, (rated) pf
Voltage regulation, steady state: +/- 0.5% Series Parallel
Voltage regulation with 3% speed change: +/- 0.5% Excitation voltage: 16.0 Volts 42.53 Volts Volts
Waveform deviation line - line, no load: less than 2.0% Excitation current 1.6 Amps 3.5 Amps Amps
Telephone influence factor: less than 50
https://tmiwebclassic.cat.com/tmi/servlet/cat.edis.tmiweb.gui.TMIDirector?Action=buildtab&refkind=RNTMIRefNum&tab=GDGenDataDisplayNew&tabk… 1/7
Selected Model
Version: 41205 /40304 /38531 /4246
Generator Mechanical Information

Center of Gravity
Dimension X -736.0 mm -29.0 IN.
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 = 3545 kg * Rotor WT = 1404 kg * Stator WT = 1915 kg

7,815 LB 3,095 LB 4,222 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 Min Shaft Dia 1 J2 K2 Min Shaft Dia 2 J3
62.4 LB IN. s2 279.7 MLB IN./rad 8.9 IN. 284.1 LB IN. s2 135.4 MLB IN./rad 5.5 IN. 8.4 LB IN. s2
7.05 N m s2 31.6 MN m/rad 225.0 mm 32.1 N m s2 15.3 MN m/rad 140.0 mm 0.95 N m s2
Total J
354.9 LB IN. s2
40.1 N m s2
Selected Model
Version: 41205 /40304 /38531 /4246
Generator Cooling Requirements -

Temperature - Insulation Data
Cooling Requirements: Temperature Data: (Ambient 40 0C)
Heat Dissipated: 65.6 kW Stator Rise: 80.0 0C
Air Flow: 168.0 m3/min Rotor Rise: 80.0 0C
Insulation Class: H
Insulation Reg. as shipped: 100.0 MΩ minimum at 40 0C
Thermal Limits of Generator

Frequency: 60 Hz
Line to Line Voltage: 480 Volts
B BR 80/40 1750.0 kVA
F BR -105/40 1991.0 kVA
H BR - 125/40 2188.0 kVA
F PR - 130/40 2188.0 kVA
H PR - 150/40 2319.0 kVA
H PR27 - 163/27 2406.8 kVA
Selected Model
Version: 41205 /40304 /38531 /4246
Starting Capability & Current Decrement

Motor Starting Capability (0.4 pf)
Percent
SKVA
Volt Dip
313 2.5
643 5.0
991 7.5
1,358 10.0
1,746 12.5
2,157 15.0
2,593 17.5
3,056 20.0
3,549 22.5
4,075 25.0
4,637 27.5
5,239 30.0
5,886 32.5
6,583 35.0
7,335 37.5
8,150 40.0
Current Decrement Data
E Time
AMP
Cycle
0.0 18,665
1.0 12,379
2.0 10,221
3.0 9,168
4.0 8,433
5.0 7,817
7.5 6,532
10.0 5,504
12.5 4,828
15.0 4,806
20.0 5,276
25.0 5,939
30.0 6,669
35.0 7,073
40.0 7,252
45.0 7,352
Instantaneous 3 Phase Fault Current: 18665 Amps Instantaneous Line - Line Fault Current: 15235 Amps
Instantaneous Line - Neutral Fault Current: 23750 Amps
Selected Model
Version: 41205 /40304 /38531 /4246
Generator Output Characteristic Curves

Open Circuit Curve
Field Line -
Current Line Volt
0.0 0
30.5 288
35.9 336
41.9 384
49.0 432
58.7 480
74.3 528
103.0 576
160.8 624
284.2 672
Short Circuit Curve
Field Armature
Current Current
0.0 0
49.1 1,091
57.3 1,272
65.4 1,454
73.6 1,636
81.8 1,818
90.0 1,999
98.2 2,181
106.3 2,363
114.5 2,545
Selected Model
Version: 41205 /40304 /38531 /4246
Generator Output Characteristic Curves

Zero Power Factor Curve
Field Line -
Current Line Volt
81.8 0
113.4 240
119.0 288
125.2 336
133.0 384
144.0 432
162.3 480
197.2 528
269.1 576
423.7 624
Air Gap Curve
Field Line -
Current Line Volt
0.0 0
30.1 288
35.1 336
40.2 384
45.2 432
50.2 480
55.2 528
60.2 576
65.3 624
70.3 672
Selected Model
Version: 41205 /40304 /38531 /4246
Reactive Capability Curve
Selected Model
Version: 41205 /40304 /38531 /4246
General Information
DM7825 Caterpillar SR5 Generators (50 Hz, 60 Hz)
Data for 1400, 1600, 1700, 1800 and 1900 frames Caterpillar SR5
generators built by Leroy Somer - USA and Leroy Somer France.
Refer to DM7821 for explanation of all generator data in Technical

Marketing Information (TMI) except generator efficiency for which the
explanation is given below.
GENERATOR EFFICIENCY
Generator efficiency is the percentage of engine flywheel (or other
prime mover) power that is converted into electrical output. The
generator efficiency shown is calculated by the summation of all
losses method, and is determined in accordance with the IEC Standard
60034. The efficiency considers only the generator. There is no
consideration of engine or parasitic losses here.
Refer to DM7829 for low and medium voltage protective setting values a
nd limits.
Caterpillar Confidential: Green

Content Owner: Commercial Processes Division
Web Master(s): PSG Web Based Systems Support
Current Date: 21/5/2021 10:03:53
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21/5/2021 Caterpillar Generator Data

Reactances Per Unit Ohms

Time Constants Seconds

Generator Mechanical Information

Generator WT = 3545 kg * Rotor WT = 1404 kg * Stator WT = 1915 kg

Rotor Balance = 0.0508 mm deflection PTP

Generator Torsional Data

J1 = Coupling J2 = Rotor J3 = Exciter

Generator Cooling Requirements -

Thermal Limits of Generator

Starting Capability & Current Decrement

Generator Output Characteristic Curves

Generator Output Characteristic Curves

Reactive Capability Curve

Refer to DM7821 for explanation of all generator data in Technical

Caterpillar Confidential: Green

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