ELECTRIC POWERRATINGS GUIDEGenerator Sets
11
CONTENTSRRAATTIINNGGSS GGUUIIDDEE
Caterpillar® Diesel Ratings 4
Caterpillar Diesel Rental Ratings 9
Caterpillar Diesel Ratings Definitions 10
Caterpillar Gas Ratings 14
Caterpillar Gas Ratings Definitions 19
Conversion Tables 22
Note Pages 33
CAT® GENERATOR SETSDDIIEESSEELL
55
DIESELCCOONNTTIINNUUEEDD
CAT 50 Hz DIESEL RATINGS (CONT.)
Prime
–––
2425325048506500
1963––
2600–
39255200
––
–––
––––––
Continuous
1368182520252200293844005875
177522252875236332383550472569889313
345646565238
65507638872598251309417463
Configuration––––––––––––––––––
–––
––––––
Generator SetModel
6CM208CM209CM20
3606360836123616
36066CM258CM25
36089CM25
36123616
12CM3216CM32
6CM328CM329CM32
6CM437CM438CM439CM4312CM4316CM43
1000 rpmStandby
–––
2688357553757150
2163––
2863–
43255725
––
–––
––––––
kVA
750 rpm
600 rpm
500 rpm
DIESELRRAATTIINNGGSS
44
CAT® 50 Hz DIESEL RATINGS
Prime
275320365365
410
455
500
500545550591
635680725810910
1000100011501275136015001600170018252000227527252825*
Continuous
––––
–
–
–
––––
––––
830906910
100012061320
–1500
–16001750200025002600*
Configuration
Low BSFCLow BSFCLow BSFC
EU Stage II, Low BSFC,Low Emissions
EU Stage II, Low BSFC,Low Emissions
EU Stage II, Low BSFC,Low Emissions
EU Stage II, Low BSFC,Low Emissions
Low BSFC, Low EmissionsLow BSFC, Low Emissions
EU Stage IIEU Stage II, Low BSFC,
Low EmissionsLow BSFCLow BSFCLow BSFCLow BSFC
Low BSFC, Low EmissionsLow BSFC, Low EmissionsLow BSFC, Low Emissions
Low BSFCLow BSFC
Low BSFC, Low EmissionsLow BSFC, Low EmissionsLow BSFC, Low EmissionsLow BSFC, Low Emissions
Low BSFCLow BSFC, Low EmissionsLow BSFC, Low Emissions
Low BSFCLow BSFC
Generator SetModel
3406C3406C3406C
C15 ACERTTM
C15 ACERT
C15 ACERT
C15 ACERT
C18 ACERTC18 ACERTC18 ACERTC18 ACERT
C18 ACERT3412C3412C3412C
C32 ACERT3508B
C32 ACERT35123512
3512B3512B
3512B-HD3512B-HD
35163516B
3516B-HDC175-16C175-16
1500 rpmStandby
300350400400
450
500
550
550600605650
700750800900
1000–
110012501400150016001750187520002250250030003100*
kVA
*Rating does not include package mounted radiator
77
DIESELCCOONNTTIINNUUEEDD
CAT 60 Hz DIESEL RATINGS (CONT.)
Prime
275275320320
365365
410
455
–
50054559163568072581091091010001135127513601360160018251825
–225027252825*
Continuous
––––
––
–
–
–
––––––
7408328308901010123012301230145016401650
–205025002600*
Configuration
EPA Tier 3Low BSFCLow BSFC
EPA Tier 3, Low BSFC,Low Emissions
Low BSFCEPA Tier 3, Low BSFC,
Low EmissionsEPA Tier 3, Low BSFC,
Low EmissionsEPA Tier 2, Low BSFC,
Low EmissionsEPA Tier 2, Low BSFC,
Low EmissionsEPA Tier 2, Low BSFCEPA Tier 2, Low BSFCEPA Tier 2, Low BSFCEPA Tier 2, Low BSFCEPA Tier 2, Low BSFCEPA Tier 2, Low BSFCEPA Tier 2, Low BSFC
Low BSFC, Low EmissionsEPA Tier 2, Low BSFC
Low BSFCLow BSFC
Low BSFC, Low EmissionsLow BSFC, Low Emissions
EPA Tier 2Low BSFC
Low BSFC, Low EmissionsEPA Tier 2
EPA Tier 1, Low BSFCEPA Tier 2
Low BSFC, EPA Tier 2Low BSFC, EPA Tier 2
Generator SetModel
C9 ACERTTM
3406C3406C
C15 ACERT
3406CC15 ACERT
C15 ACERT
C15 ACERT
C15 ACERT
C18 ACERTC18 ACERTC27 ACERTC27 ACERTC27 ACERTC27 ACERTC32 ACERT
3508BC32 ACERT
35123512
3512B3512B3512C3516
3516B3516C3516B
3516C-HDC175-16C175-16
1800 rpmStandby
300300350350
400400
450
500
550(ESP)1
550600650700750800900–
1000110012501400150015001750200020002250250030003100*
ekW
Note1: (ESP) Emergency Standby Rating*Rating does not include package mounted radiator
DIESELCCOONNTTIINNUUEEDD
66
CAT 60 Hz DIESEL RATINGS
*All ratings at 1.0 pf **All ratings at 0.8 pf
Prime
12161822273645547290
12161822273645547290114136158
Generator SetModel
D13-4SD17-4SD20-6SD25-8SD30-8SD40-6SD50-6SD60-8SD80-6SD100-6S
D13-4D18-4D20-6D25-8D30-10D40-6D50-6D60-6D80-6D100-6D125-6D150-8D175-2
Engine
C1.5C2.2C2.2C2.2C2.2C4.4C4.4C4.4C4.4C4.4
C1.5C2.2C2.2C2.2C2.2C4.4C4.4C4.4C4.4C4.4C6.6C6.6C6.6
Configuration
EPA Tier 4EPA Tier 4EPA Tier 4EPA Tier 4EPA Tier 4EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 3
EPA Tier 4EPA Tier 4EPA Tier 4EPA Tier 4EPA Tier 4EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 3
Single Phase Output* 1800 rpmStandby
131720253040506080100
131820253040506080100125150175
eKW
3-Phase Output** 1800 rpm
Prime
210–225
Continuous
–––
Configuration
Low BSFCLow BSFCEPA Tier 3
Generator SetModel
3306B3306B
C9 ACERTTM
1800 rpmStandby
230250250
ekW
CAT 60 Hz DIESEL RATINGS (CONT.)
Available only for North America
99
DIESELRREENNTTAALL UUNNIITT RRAATTIINNGGSS
CAT 60 Hz RENTAL UNIT RATINGS
Prime
1827415470902102753655459101825
Continuous
––––––––––––
Configuration
EPA Tier 4EPA Tier 4EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 3EPA Tier 2EPA Tier 2EPA Tier 2
Rental GeneratorModel
XQ20XQ30XQ45XQ60XQ80XQ100XQ230XQ300XQ400XQ600XQ1000XQ2000
1800 rpmStandby
2030456080100230*300*400*6001000*2000
ekW
*Available at 50Hz
DIESELCCOONNTTIINNUUEEDD
88
CAT 60 Hz DIESEL RATINGS (CONT.)
Prime
–––
1820242036404840
1525–
2020––
30504040
––
–––
––––––
Continuous
980130014701650220033004400
137517301830223025002750366055907450
276537254190
5240611069807860
1047513970
Configuration
––––
–––––––
–––––––––
––––
Generator SetModel
6CM208CM209CM20
3606360836123616
36066CM25
36088CM259CM25
36123616
12CM3216CM32
6CM328CM329CM32
6CM437CM438CM439CM4312CM4316CM43
900 rpm
ekW
720 rpm
600 rpm
514 rpm
Standby
–––
2000266040005320
1680–
2200––
33604400
––
–––
––––––
1111
DIESELRRAATTIINNGGSS DDEEFFIINNIITTIIOONNSS
Prime PowerOutput available with varying load for an unlimited time. Averagepower output is 70% of the prime power rating. Typical peak demandof 100% of prime-rated ekW with 10% of overload capability foremergency use for a maximum of 1 hour in 12. Overload operationcannot exceed 25 hours per year. Prime power in accordance withISO8528. Fuel stop power in accordance with ISO3046.
Continuous PowerOutput available without varying load for an unlimited time. Averagepower output is 70 - 100% of the continuous power rating. Typicalpeak demand is 100% of continuous rated ekW for 100% of operatinghours. Continuous power in accordance with ISO8528. Fuel stoppower in accordance with ISO3046.
DIESELRRAATTIINNGGSS DDEEFFIINNIITTIIOONNSS
1100
CAT DIESEL RATING DEFINITIONS:
Emergency Standby Power (ESP)Output available with varying load for the duration of an emergencyoutage. Average power output is 70% of the standby power rating.Typical operation is 50 hours per year with maximum expected usageof 200 hours per year. Standby power in accordance with ISO8528.Fuel stop power in accordance with ISO3046.
Standby PowerOutput available with varying load for the duration of the interruptionof the normal source power. Average power output is 70% of thestandby power rating. Typical operation is 200 hours per year, withmaximum expected usage of 500 hours per year. Fuel stop power inaccordance with ISO3046.
CAT GENERATOR SETSGGAASS
1155
GASCCOONNTTIINNUUEEDD
CAT 50 Hz CONTINUOUSGAS RATINGS (CONT.)
CAT 50 Hz CONTINUOUS CHPGAS RATINGS
kVA1500 rpm
––
194419441986
––
24382458
–––––––
NaturalGas
G3606G3606
G3516C IM*G3516CG3516CG3608G3608
G3520CG3520C IM*
G3612G3612G3612G3612G3616G3616G3616
Low EnergyGas
––––––––
G3520C–
G3520C–––––
Propane––––––––––––––––
kVA1000 rpm
16061712
–––
21432281
––
3212342535933625428145624825
kVA1500 rpm
13801456200025002500
NaturalGas
G3516BG3516BG3516EG3520CG3520E
Low EnergyGas
–––––
Propane–––––
kVA1000 rpm
–––––
*IM Island Mode
GASRRAATTIINNGGSS
1144
CAT 50 Hz CONTINUOUSGAS RATINGS
kVA1500 rpm
8087
106129138156156200350450600619631638906931956963
10941156121912191256125612881288135613881431
NaturalGas
–G3306 NAG3306 NA
–G3306 TAG3306 TAG3406 NAG3406 TAG3412 TA
G3412C LEG3508 LEG3508 LEG3508 LEG3508 LEG3512 LEG3512 LEG3512 LEG3512 LE
––
G3516 TAG3516 LEG3516 TAG3516 LEG3516 TAG3516 LEG3516BG3516BG3516B
Low EnergyGas
G3306NA––
G3406NA––
–––––––––
G3512 LE––––––––
G3516 LE–––
Propane–––
–
––––––––––––
G3516 LEG3516 LE
–––––––––
kVA1000 rpm
––––––--––––––––––––––––––––––
Note1: A factory supplied generator by DTO or a customer supplied generator needed.
1177
GASCCOONNTTIINNUUEEDD
CAT 60 Hz CONTINUOUSGAS RATINGS (CONT.)
kW1800 rpm
150190350–––
375375––––––––––––––––––––
NaturalGas
G3406 NAG3406 TAG3412 TAG3508 LEG3508 LEG3508 TAG3412 TA
G3412C LEG3508 LEG3508 TAG3508 LEG3508 LEG3508 LEG3512 TAG3512 TAG3512 TAG3512 LEG3512 LEG3512 LE
––
G3516 TAG3516 TAG3516 TAG3516 LEG3516 LE
–G3516 LE
Low EnergyGas
––––––––––––––––––––––––––
G3516 LE–
Propane––
G3412 TA–
G3412 TA–
G3412 TA––––––––––––
G3516 LEG3516 LE
–––––––
kW1200 rpm
–––
360370370––
375380385390400555560570570585600695735750755770770795815820
Note1: A factory supplied generator by DTO or a customer supplied generator needed.
GASCCOONNTTIINNUUEEDD
1166
CAT 60 Hz STANDBYGAS RATINGS
CAT 60 Hz CONTINUOUSGAS RATINGS
kW1800 rpm
150240260275350375410435445450460470480495515
1040
NaturalGas
G3406 NAG3406 TAG3406 TAG3406 TAG3412 TA
G3412C LE–
G3412 TA–
G3412 TAG3412 TAG3412 TAG3412 TAG3412 TAG3412 TAG3516 LE
Low EnergyGas
––––––––––––––––
Propane––––––
G3412 TA–
G3412 TA–––––––
kW1000 rpm
––––––––––––––––
kW1800 rpm
7285
100132135140150
NaturalGas
–G3306 NAG3306 NA
–G3306 TAG3306 TAG3306 TA
Low EnergyGas
G3306NA––
G3406NA–––
Propane–––––––
kW1200 rpm
–––––––
1199
GASRRAATTIINNGGSS DDEEFFIINNIITTIIOONNSS
CAT GAS RATING DEFINITIONS:
Standby PowerThese ratings are applicable for supplying continuous electricalpower (at variable load) in the event of a utility power failure. Nooverload is permitted on these ratings. Natural gas ratings have beenestablished on natural gas with net calorific Low Heat Value (LHV) ofapproximately 35.6 MJ/m3 (905 Btu/ft3) and 80 methane number (MN).
Continuous PowerOutput available without varying load for an unlimited time.Continuous power in accordance with ISO8528, AS2789, and BS5514.Natural gas ratings have been established on natural gas with netcalorific Low Heat Value (LHV) of approximately 35.6 MJ/m3 (905Btu/ft3) and 80 methane number (MN).
ekW — Generator output at 0.8 pfkVA — Generator output
GASCCOONNTTIINNUUEEDD
1188
CAT 60 Hz CONTINUOUSGAS RATINGS (CONT.)
kW1200 rpm
–––––
1600––––––––––––––––
kW1800 rpm
––
13001400
––
1635–
1660190020552055
––––––––––
Low EnergyGas
–––––
G3520C––––––––––––––––
NaturalGas
G3606G3606
G3516BG3516BG3608
G3520CG3516CG3608
G3516CG3520CG3520C
G3520C IM*G3612G3612G3612G3612G3612G3612G3616G3616G3616G3616
kW900 rpm
11551235
––
1540––
1640––––
2310231523352465259526153080310532853480
*IM Island Mode
CONVERSIONSRRAATTIINNGGSS GGUUIIDDEE
2233
CONVERSIONSCCOONNTTIINNUUEEDD
ELECTRICAL TABLES
Single-Phase
V x I x P.F.1000
V x I1000
KW.746 x EFF. (Gen)
HP x .746EFF. (Mot.)
HP x .746V x P.F. x EFF.
KW x 1000V x P.F.
KVA x 1000V
Poles x RPM120
V x I x 1-(P.F.)21000
100 (VNL-VFL)VFL
Three-Phase
1.732 x V x I x P.F.1000
1.732 x V x I1000
KW.746 x EFF. (Gen)
HP x .746EFF. (Mot.)
HP x .7461.732 x V x EFF. x P.F.
KW x 10001.732 x V x P.F.
KVA x 10001.732 x V
Poles x RPM120
1.732 x V x I x 1-(P.F.)21000
100 (VNL-VFL)VFL
To Obtain
Kilowatts
KVA
Horsepowerrequired when KWknown (Generator)
KW input whenHP known (Motor)
Ampheres whenHP known
Ampheres whenKW known
Ampheres whenKVA known
Frequency(c.p.s)
ReactivekVA (KVAR)
% VoltageRegulation
Direct Current
V x I1000
KW.746 x EFF. (Gen)
HP x .746EFF. (Mot.)
HP x .746V x EFF.
KW x 1000V
100 (VNL-VFL)VFL
Alternating Current
ELECTRICAL TABLE ABBREVIATIONS:
V - voltage in voltsI - current in ampheresKW - power in kilowatts (actual power)KVA - kilovolt-ampheres (apparent power)HP - horsepowerRPM - revolutions per minute
KVAR - reactive kilovolt-ampheresEFF. - efficiency as a decimal factorNL - no loadFL - full loadP.F. - power factorNote: DC KW = DC KVA
CONVERSIONSRRAATTIINNGGSS GGUUIIDDEE
2222
FUEL SYSTEM - DIESEL
Day Tank Sizing
Tank Size (gal) = Rated BSFC (lb/hp•hr) x Rated HP x Load Factor7.076 (lb/gal)
x Hours Between Refilling+ Reserve Requirement
ORRule of Thumb for tank size with 25% reserve0.056 x Ave. BHP demand x Hours between refills x 1.25 = gal.0.27 x Ave. BKW demand x Hours between refills x 1.25 = liters.
Note: Additional tank capacity required for cooling of recirculated fuel in unit-injectedengines. Tank should be located below level of injectors or nozzles.
On-Site Power RequirementsBased on 100,000 sq ft. of office bldg., etc and 40°N. Latitudes
• Electric Requirements600 kW continuous load(Air conditioning is absorption)Use three - 300kW units(2 prime and 1 standby)
Refrigeration• One ton refrigeration = 200 Btu/min = 12,000 Btu/h• One Boiler hp = 33,475 Btu/h• One ton compressor rating = One engine hp• Auxiliary air conditioning equipment requires 1/4 hp/ton of compressor rating
Ice Plant• Complete power requires 4-5 hp per daily ton capacity
Air Compressor• hp = 1/4 x cu ft m/min at 100 psi
Increase bhp 10% for 125 psiDecrease bhp 10% for 80 psi
• Air Conditioning and Compressor400 tons prime loadUse two - 200 hp engines(No Standby)
2255
CONVERSIONSCCOONNTTIINNUUEEDD
REDUCED VOLTAGE STARTERS
Type of Starter
Full Voltage Starter
Auto Transformer• 80% Tap• 65% Tap• 50% Tap
Resistor StarterSingle Step
(adjusted for motorvoltage to be 80%of line voltage)
Reactor• 50% Tap• 45% Tap• 37.5% Tap
Part Winding (low-speed motors only)
• 75% Winding• 80% Winding
Motor Voltage(% Line Voltage)
100
806550
80
504537.5
100100
Line Current(% Full Voltage)Starting Current
100
684630
80
504537.5
7550
Starting Torque(% of Full Voltage)Starting Torque
100
644225
64
252014
7550
CONVERSIONSCCOONNTTIINNUUEEDD
2244
THREE-PHASE CONNECTION SYSTEMS
2277
CONVERSIONSCCOONNTTIINNUUEEDD
ENGINE ROOM VENTILATION
Engine room ventilation can be estimated by the following formulas,assuming 100°F (38°C) ambient air temperature:
V (cfm) = H + Engine Combustion Air0.070 x 0.24 x T
V (m3/min) = H + Engine Combustion Air1.099 x 0.017 x T
V = Ventilation air (cfm) (m3/min).H = Heat radiation (Btu/min) (kW).T = Permissible temperature rise in engine room (°F) (°C).
Density of air at 100°F = 0.070 lb/cu ft (1.099 kg/m3).Specific heat of air = 0.24 Btu/°F (0.017 kW/°C).
CONVERSIONSCCOONNTTIINNUUEEDD
2266
COMPARISON OF REDUCED VOLTAGE STARTING METHODS
Characteristic
Starting Line Currentat Same MotorTerminal Voltage
Starting PowerFactor
Power Draw fromLine During Starting
Ease of Control
Maintenance
Line Disturbance
Autotransformer
Least
Increases slightlywith speed
Motor momentarilydisconnected fromline from start to run
Same
Same
Reactor
Same
Same
Two-StepPart Winding
Increases slightlywith speed
Smooth
No provisionfor adjustment ofstarting current
Less than others
More than others
––– More than autotransformer type –––
––– Varies with conditions and type of load –––
*Resistor starting adds considerable kW load to generator set. Total powerrequired includes the motor kW and the kW which is lost as heat in the resistor.The series resistors account for a higher than normal starting power factor.
––– More than autotransformer type –––
Increases rapidly with speed
Smooth. Transfer madewith little change in
motor terminal voltage
Primary Resistor
Lower in small size-otherwise equal
Same
Same
Relative Cost
Smoothnessof Acceleration
Torque
Average Average Less than others
Low High* Low Low
Low
2299
CONVERSIONSCCOONNTTIINNUUEEDD
CONVERSION FACTORS
U.S.gal/min
1694.5448.84.40315.85
million U.S.gal/day
0.001 4401
0.06460.006 340.0228
ft3/s0.002 23
1.5471
0.009 810.0353
m3/h0.2270157.73101.9
13.60
L/s0.063143.828.320.2778
1
Flow
UnitU.S. gpm
1 million gal/dayft3/sm3/hL/s
1 Therm = 1,000,000 BtuBtu/ft2/min = 0.1220 Watts/in2
Btu/ft3 = 8.899 kg-cal/m3
Btu/lb = .5556 kg-cal/kg
Energy
MCFD = 1000 ft3/day MMCFD = 1,000,000 ft3/day lb/bhp-hr x 607.73 = g/kW-hr
UnitBTU
CalorieFoot-Pound
JouleKilocalorieTherm
BTU1
0.003970.0012850.0009483.96825100,000
Cal2521
0.3237650.23895
1000396.8254
ft-lb778
3.088661
0.737453089
128.5347
J1055.056
4.1871.356
14185
94.78169
Kcal0.2520.001
0.0030890.000239
10.39682
Therm0.00001
–––
2.5191
CONVERSIONSCCOONNTTIINNUUEEDD
2288
CONVERSION FACTORS
Unitmm2
in2
m2
ft2
mm2
1645.16
10 0000092903
in2
0.001551
1550144
m2
–0.000 645 16
10.0929
ft2
–0.006 944
10.7641
Area
mm1
25.4304.8914.41000
100 0000160 9340
in.03937
11236
39.370139 370.163 360
ft.0032810.083 33
13
3.280 843208.84
5280
yd.0010940.027 780.333 33
11.093 611093.61
1760
m.001
0.02540.30480.9144
11000
1609.34
km.0000 010.000 030.000 300.000 91
0.0011
1.609 34
mi––––
0.000 620.621 37
1
1 sq mile = 640 acres1 acre = 4840 yd2
1 cir mil = 7.854 x 10-7in2
1 cir mil = .7854 x mils21 cir mil = 5.067 x 10-6cm2
LengthUnitmminftydmkmmi
1 grain = 0.064799 gram
––– Tons –––
Weight
Kilograms1
0.028350.4536907.21,0161,000
Unit1 Kilogram1 Ounce1 Pound
1 Short Ton1 Long Ton1 Metric Ton
OuncesAvoirdupois
35.271
1632,00035,84035,300
PoundsAvoirdupois
2.2050.0625
12,0002,2402,205
Short–––1
1.121.102
Long–––
0.89291
0.9842
Metric–––
0.90721.016
1
3311
CONVERSIONSCCOONNTTIINNUUEEDD
CONVERSION FACTORS
m3
0.000 020.028 320.76455
–1
0.003 780.004 55
0.0011233.48
U.S. gal0.004 327.480 52201.974
2.6 x 10-7
264.1921
1.200 950.264 17325 851
lmp gal0.003 615.228 83168.178
2.2 x 10-7
219.969–1
0.219 97271 335
liter0.0163928.3169764.555
1.0 x 10-6
10003.785 414.546 09
1–
J/min1055.0001.350444791
14412759997
59.9968
Metric hp0.023910.000031.014
0.00002261
1.359620.00136
kW0.01758430.00002260.74570
0.00001660.73549
10.001
W17.58430.0226745.7
0.016668735.498
10001
lb/in2
0.019 340.491 150.036 130.433 52
114.225714.504
0.145 038
kg/cm2
0.001 360.034 530.002 540.030 4790.070 31
11.019 72
0.010 1972
bar0.001 330.033 860.002 490.029 890.068 950.980 67
10.010 000
Atmospheres101.4Pa (14.7 psi)
0.001 3150.033 420.002 460.029 500.068 050.967 840.98692
0.009 869 20
kPa––
0.2492.9896.89598.067101.325
1
CONVERSIONSCCOONNTTIINNUUEEDD
3300
CONVERSION FACTORS
Unitmm/Hgin./Hgin. H20ft. H20lb/in2
kg/cm2
barkPa
mm/Hg(0°C)
125.4
1.868 2722.419251.7149735.559750.0627.500 62
in./Hg(0°C)
0.039 371
0.07 3550.882 652.036 0228.95929.530
0.295 30
in. H20(60°F)0.535713.61
112
27.70395
401.84.01835
ft. H20(60°F)
0.044641.134
0.083 331
2.30932.8433.49
0.33486
1 board-foot = 144 in3 1 bushel = 1.244 ft3 1 bushel = 4 pecks
Volume and Capacity
UnitBtu/minft-lb/min
HorsepowerJoules/minMetric hpKilowattWatt
Btu/min1
0.0012842.4560.0009541.827
590.05687
ft-lb/min778.2
1330000.7405325504425044.25
hp0.023580.00003
10.0000223
0.986321.341020.00134
Unitin3
ft3
yd3
mm3
m3
U.S.gallmp galliter
acre-ft
in3
11728
466566.1 x 10-5
61 023.7231
277.41961.023 7
–
ft3
0.000 58127
4.0 x 10-8
35.31470.133 680.160 540.035 3143 560
yd3
0.000 020.037 04
1–
1.307 950.004 950.005 950.001 311613.33
mm3
16387.128 320 000764 554 858
11,000,000,000
378542045400901000 000
–
Volume and Capacity
Power
Pressure and Head
3333
NOTESRRAATTIINNGGSS GGUUIIDDEE
CONVERSIONSCCOONNTTIINNUUEEDD
3322
CONVERSION FACTORS
NEMA Code Letter
ABCDEFGHJKLMNPRSTUV
Starting skVA/hp
0.00 - 3.143.15 - 3.543.55 - 3.994.00 - 4.494.50 - 4.995.00 - 5.595.60 - 6.296.30 - 7.097.10 - 7.998.00 - 8.999.00 - 9.99
10.00 - 11.1911.20 - 12.4912.50 - 13.9914.00 - 15.9916.00 - 17.9918.00 - 19.9920.00 - 22.39
22.40
Identifying Code Letters on AC Motors
Note: Code letters apply to motors up to 200 HP.
Temperature Conversion°F = (1.8 x °C) + 32
°C = 0.5555 (°F - 32)
Angle1 quadrant = 90 degrees1 quadrant = 1.57 radians1 radian = 57.3 degrees1 degree = 60 minutes
1 minute = 2.9 x 10 radians
NNOOTTEESSNNOOTTEESS
NNOOTTEESSNNOOTTEESS
To find your nearest dealer go to:www.cat-electricpower.com
© 2008 Caterpillar All Rights Reserved Printed in USA CAT,CATERPILLAR, their respective logos, ACERT, ADEM, "CaterpillarYellow" and the POWER EDGE trade dress, as well as corporateand product identity used herein, are trademarks of Caterpillarand may not be used without permission.
LEXE7582-01November 2008