electricpower ratingsguide - energy power systems · pdf fileelectricpower ratingsguide ......

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

DIESELRRAATTIINNGGSS

CAT 50 Hz DIESEL RATINGS (CONT.)

Prime

7381050110014001475

–––

2425325048506500

1963––

2600–

39255200

––

–––

––––––

Continuous

6389691013122512881368182520252200293844005875

177522252875236332383550472569889313

345646565238

65507638872598251309417463

Configuration–––––– ––––––––––––––––––––––––––––

Generator SetModel

3508B3512

3512B3516

3516B6CM208CM209CM203606360836123616

36066CM258CM253608

9CM2536123616

12CM3216CM32

6CM328CM329CM32

6CM437CM438CM439CM4312CM4316CM43

1000 rpmStandby

–––––– ––

2688357553757150

2163––

2863–

43255725

––

–––

––––––

kVA

750 rpm

600 rpm

500 rpm


44

CAT® 50 Hz DIESEL RATINGS

Prime

275320365365

410

455

500

500545550591

63568072581091010001000115012751360150016001700182520002275

––

Continuous

––––

–

–

–

––– –

––––

830906910100012061320

–1500

–160017502000

––

Configuration

Low BSFCLow BSFCLow BSFC

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-HDC175C175

1500 rpmStandby

300350400400

450

500

550

550600605650

7007508009001000

–110012501400150016001750187520002250250030003100

kVA

77



Prime

275275320320

365365

410

455

–

50054559163568072581091091010001135127513601360160018251825

–2250

––

Continuous

––––

––

–

–

–

– –––––

7408328308901010123012301230145016401650

–2050

––

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 EPA Tier 2, Low BSFC EPA Tier 2, Low BSFC EPA Tier 2, Low BSFC EPA Tier 2, Low BSFC EPA 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


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


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


88


Prime

6001015125012851450

–––

1820242036404840

1525–

2020––

30504040

––

–––

––––––

Continuous

520890110011451325

980130014701650220033004400

137517301830223025002750366055907450

276537254190

52406110698078601047513970

Configuration

–––––

–––––––

–––––––––

–––

––––––

Generator SetModel

3508B3512B3516

3516B3516B

6CM208CM209CM203606360836123616

36066CM253608

8CM259CM2536123616

12CM3216CM32

6CM328CM329CM32

6CM437CM438CM439CM4312CM4316CM43

1200 rpmStandby

–––––

–––

2000266040005320

1680–

2200––

33604440

––

–––

––––––

ekW

900 rpm

720 rpm

600 rpm

514 rpm

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 and ISO3046.

Continuous PowerOutput available without varying load for an unlimited time. Averagepower output is 70 - 100% of the continuous power rating. Typical peak demand is 100% of continuous rated ekW for 100% of operatinghours. Continuous power in accordance with ISO8528 and 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 ISO8528and 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. Standby power inaccordance with ISO8528 and ISO3046.

CAT GENERATOR SETSGGAASS

1155

GASRRAATTIINNGGSS

CAT 50 Hz CONTINUOUS GAS RATINGS (CONT.)

CAT 50 Hz CONTINUOUS CHPGAS RATINGS

kVA1500 rpm

–16151700

–19752000

––

24382458

–––––––

NaturalGas

G3606G3520 BG3520 BG3606

G3516 CG3516 CG3608G3608

G3520 CG3520 CIM

G3612G3612G3612G3612G3616G3616G3616

Low EnergyGas–––––––––

G3520 CCMM–––––––

Propane–––––––––––––––––

kVA1000 rpm

1606––

1712––

21432281

––

3212342535933625428145624825

kVA1500 rpm

1380145618251975200025002500

NaturalGas

G3516 BG3516 BG3520 BG3516 EG3516 EG3520 CG3520 E

Low EnergyGas–––––––

Propane–––––––

kVA1000 rpm

–––––––

GASRRAATTIINNGGSS

1144

CAT 50 Hz CONTINUOUSGAS RATINGS

kVA1500 rpm

8710613815615619420021322523725626328830031935045060061963163890693195696310941156121912191256125612881288135613881431

NaturalGas

G3306 NAG3306 NAG3306 TAG3306 TAG3406 NAG3408 NA1

G3406 TA––

G3408 TA1

G3408 TA1

G3408 TA1

G3408 TA1

G3408 LE1

G3408 LE1

G3412 TAG3412C LEG3508 LEG3508 LEG3508 LEG3508 LEG3512 LEG3512 LEG3512 LEG3512 LE

––

G3516 TAG3516 LEG3516 TAG3516 LEG3516 TAG3516 LEG3516 BG3516 BG3516 B

Low EnergyGas–––––––––––––––––––––––

G3512 LE––––––––

G3516 LE–––

Propane–––––

G3408 NA1

–G3408 TA1

G3408 TA1

G3408 TA1

G3408 TA1

––––––––––––––

G3516 LEG3516 LE

–––––––––

kVA1000 rpm

––––––––––––––––––––––––––––––––––––

Note1: A factory supplied generator by DTO or a customer supplied generator needed.

1177

GASRRAATTIINNGGSS

CAT 60 Hz CONTINUOUSGAS RATINGS (CONT.)

kW1800 rpm

150175190230250255280350–––

375375––––––––––––––––––––

NaturalGas

G3406 NA–

G3406 TAG3408 TAG3408 TA1

G3408 TA1

G3408 TA1

G3412 TAG3508 LEG3508 LEG3508 TAG3412 TAG3412C 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–

G3408 NA1

–G3408 TA1

G3408 TA1

––

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.

GASRRAATTIINNGGSS

1166

CAT 60 Hz STANDBYGAS RATINGS

CAT 60 Hz CONTINUOUSGAS RATINGS

kW1800 rpm

1502402602702752903003103253403503754104354454504604704804955151040

NaturalGas

G3406 NAG3406 TAG3406 TA

–G3406 TA

–G3408 TA1

G3408 TA1

G3408 TA1

G3408 TA1

G3412 TAG3412C LE

–G3412 TA

–G3412 TAG3412 TAG3412 TAG3412 TAG3412 TAG3412 TAG3516 LE

Low EnergyGas––––––––––––––––––––––

Propane–––

G3408 TA1

–G3408 TA1

––––––

G3412 TA–

G3412 TA–––––––

kW1000 rpm

––––––––––––––––––––––

kW1800 rpm

85100135140150

NaturalGas

G3306 NAG3306 NAG3306 TAG3306 TAG3306 TA

Low EnergyGas–––––

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

GASRRAATTIINNGGSS

1188

CAT 60 Hz CONTINUOUSGAS RATINGS (CONT.)

kW1200 rpm

––––––

1600––––––––––––––––

kW1800 rpm

––

125013001400

––

1635–

1660190020552055

––––––––––

Low EnergyGas––––––

G3520C––––––––––––––––

NaturalGas

G3606G3606

G3516BPMG3516BG3516BG3608G3520CG3516CG3608G3516CG3520CG3520C

G3520CIMG3612G3612G3612G3612G3612G3612G3616G3616G3616G3616

kW900 rpm

11551235

–––

1540––

1640––––

2310231523352465259526153080310532853480

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



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

Horsepower required when KWknown (Generator)

KW input when HP known (Motor)

Ampheres when HP known

Ampheres when KW known

Ampheres when KVA known

Frequency(c.p.s)

ReactivekVA (KVAR)

% VoltageRegulation

Direct Current

V x I1000



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


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

5045

37.5

100100

Line Current (% Full Voltage)Starting Current

100

684630

80

5045

37.5

7550

Starting Torque(% of Full Voltage)Starting Torque

100

644225

64

252014

7550


2244

THREE-PHASE CONNECTION SYSTEMS

2277


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).


2266

COMPARISON OF REDUCED VOLTAGE STARTING METHODS

Characteristic

Starting Line Currentat Same Motor

Terminal Voltage

Starting PowerFactor

Power Draw fromLine During Starting

Ease of Control

Maintenance

Line Disturbance

Autotransformer

Least

Increases slightlywith speed

Motor momentarilydisconnected from

line from start to run

Same

Same

Reactor

Same

Same

Two-Step Part Winding

Increases slightlywith speed

Smooth

No provision for 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 power required 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 made with 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


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

UnitBTUCalorie

Foot-PoundJoule

KilocalorieTherm

BTU1

0.003970.0012850.0009483.96825100,000

Cal2521

0.3237650.238951000

396.8254

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


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 843208.845280

yd.0010940.027 780.333 33

11.093 611093.611760

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 Pound1 Short Ton1 Long Ton1 Metric Ton

OuncesAvoirdupois

35.27116

32,00035,84035,300

PoundsAvoirdupois

2.2050.0625

12,0002,2402,205

Short–––1

1.121.102

Long–––

0.89291

0.9842

Metric–––

0.90721.016

1

3311


CONVERSION FACTORS


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/minHorsepowerJoules/minMetric hpKilowattWatt

Btu/min1

0.0012842.4560.0009541.827

590.05687

ft-lb/min778.2

1330000.7405325504425044.25

hp0.023580.00003

10.00002230.986321.341020.00134

Unitin3

ft3

yd3

mm3

m3

U.S.gallmp galliteracre-ft

in3

1172846656

6.1 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 Capacitym3

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

0.016668735.4981000

1

Power

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

Pressure and Head

3333

NOTESRRAATTIINNGGSS GGUUIIDDEE


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 radians

1 radian = 57.31 degree = 60 minutes

1 minute = 2.9 x 10 radians

NNOOTTEESSNNOOTTEESS

NNOOTTEESS

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.

LEXE7582-00June 2008

electricpower ratingsguide - energy power systems · pdf fileelectricpower ratingsguide ......

Documents