Cat Generator Sets Ratings Guide
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ELECTRIC POWER RATINGS GUIDE For additional information or to find Generator Sets your nearest dealer go to: www.catelectricpowerinfo.com/rg © 2009 Caterpillar All Rights Reserved Printed in USA CAT, CATERPILLAR, their respective logos, ACERT, ADEM, “Caterpillar Yellow” the “Power Edge” trade dress, as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission. LEXE7582-02 December 2009

1 CONTENTS ratings guide Cat® Diesel Generator Sets 50 Hz Ratings 4 60 Hz Ratings 6 Rental Power Ratings 9 Definition of Diesel Ratings 10 Cat® Gas Generator Sets 50 Hz Ratings 14 60 Hz Ratings 16 Definition of Gas Ratings 19 Conversion Tables 22 Product Support Definitions 33 Product Support - Customer Support Agreements 34 Note Pages 36

CAT® GENERATOR SETS diesel

7 DIESEL 60 Hz CAT 60 Hz DIESEL RATINGS, 275 ekW - 3100 ekW Prime 275 275 320 320 365 365 410 455 – 500 545 591 635 680 725 910 1000 1135 1275 1360 1360 1600 1825 1825 – 2250 2725 2825* Continuous – – – – – – – – – – – – – – – 830 890 1010 1230 1230 1230 1450 1640 1650 – 2050 2500 2600* Configuration EPA Tier 3 Low BSFC Low BSFC EPA Tier 3, Low BSFC Low BSFC EPA Tier 3, Low BSFC EPA Tier 3, 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 BSFC EPA Tier 2, Low BSFC EPA Tier 2, Low BSFC EPA Tier 2, Low BSFC EPA Tier 2, Low BSFC Low...

11 DIESEL ratings definitions Prime Power Output available with varying load for an unlimited time. Average power output is 70% of the prime power rating. Typical peak demand of 100% of prime-rated ekW with 10% of overload capability for emergency use for a maximum of 1 hour in 12. Overload operation cannot exceed 25 hours per year. Prime power in accordance with ISO8528. Fuel stop power in accordance with ISO3046. Continuous Power Output available without varying load for an unlimited time. Average power output is 70 - 100% of the continuous power rating. Typical peak demand is 100% of...

19 GAS ratings definitions CAT GAS RATING DEFINITIONS Standby Power These ratings are applicable for supplying continuous electrical power (at variable load) in the event of a utility power failure. No overload is permitted on these ratings. Natural gas ratings have been established on natural gas with net calorific Low Heat Value (LHV) of approximately 35.6 MJ/m3 (905 Btu/ft3) and 80 methane number (MN). Continuous Power Output available without varying load for an unlimited time. Continuous power in accordance with ISO8528, AS2789, and BS5514. Natural gas ratings have been established on...

CONVERSIONS ratings guide

23 CONVERSIONS ELECTRICAL TABLES Single-Phase V x I x P.F. 1000 V x I 1000 kW .746 x EFF. (Gen) HP x .746 EFF. (Mot.) HP x .746 V x P.F. x EFF. kW x 1000 V x P.F. kVA x 1000 V Poles x RPM 120 V x I x 1-(P.F.)2 1000 100 (VNL-VFL) VFL Three-Phase 1.732 x V x I x P.F. 1000 1.732 x V x I 1000 kW .746 x EFF. (Gen) HP x .746 EFF. (Mot.) HP x .746 1.732 x V x EFF. x P.F. kW x 1000 1.732 x V x P.F. kVA x 1000 1.732 x V Poles x RPM 120 1.732 x V x I x 1-(P.F.)2 1000 100 (VNL-VFL) VFL To Obtain kW kVA Horsepower required when kW known (Generator) kW input when HP known (Motor) Ampheres when HP known...

25 CONVERSIONS REDUCED VOLTAGE STARTERS Type of Starter Full Voltage Starter Auto Transformer • 80% Tap • 65% Tap • 50% Tap Resistor Starter Single Step (adjusted for motor voltage to be 80% of line voltage) Reactor • 50% Tap • 45% Tap • 37.5% Tap Part Winding (lowspeed motors only) • 75% Winding • 80% Winding Motor Voltage (% Line Voltage) 100 80 65 50 80 50 45 37.5 100 100 Line Current (% Full Voltage) Starting Current 100 68 46 30 80 50 45 37.5 75 50 Starting Torque (% of Full Voltage) Starting Torque 100 64 42 25 64 25 20 14 75 50 CONVERSIONS 24 THREE-PHASE CONNECTION SYSTEMS

27 CONVERSIONS 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 Air 0.070 x 0.24 x T V (m3/min) = H + Engine Combustion Air 1.099 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). CONVERSIONS 26 COMPARISON OF REDUCED VOLTAGE STARTING METHODS *Resistor starting adds...

33CONVERSIONS PRODUCT SUPPORT 32 CONVERSION FACTORS PRODUCT SUPPORT DEFINITIONS Note: Code letters apply to motors up to 200 HP. Temperature Conversion °F = (1.8 x °C) + 32 °C = 0.5555 (°F - 32) Angle 1 quadrant = 90 degrees 1 quadrant = 1.57 radians 1 radian = 57.3 degrees 1 degree = 60 minutes 1 minute = 2.9 x 10 radians NEMA Code Letter ABCDEFGHJKLMNPRSTUV Starting skVA/hp 0.00 - 3.14 3.15 - 3.54 3.55 - 3.99 4.00 - 4.49 4.50 - 4.99 5.00 - 5.59 5.60 - 6.29 6.30 - 7.09 7.10 - 7.99 8.00 - 8.99 9.00 - 9.99 10.00 - 11.19 11.20 - 12.49 12.50 - 13.99 14.00 - 15.99 16.00 - 17.99 18.00 - 19.99...

34 35• A Customer Support Agreement (CSA) is an arrangement between the end user and the Cat Dealer that helps lower the cost per unit of production. • Agreements are tailored to fit your business needs and can range from simple Preventive Maintenance Kits to sophisticated Total Cost Performance Guarantees. • Trained dealer technicians assist you by maintaining your equipment and driving down operating costs. Perhaps the most important feature of any CSA is flexibility. • A Preventive Maintenance (PM) agreement covers specified maintenance at a fixed cost. You maintain reliability and...

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