ENGINE SPECIFICATIONS
General Cooling System
Make Generac Cooling System Type Closed Recovery
EPA Emissions Compliance Stationary Emergency Water Pump Flow Pre-Lubed, Self Sealing
EPA Emissions Reference See Emissions Data Sheet Fan Type Pusher
Cylinder # 6 Fan Speed (rpm) 2250 rpm
Type In-Line Fan Diameter mm (in.) 762 (30.0)
Displacement - L 10.3 Coolant Heater Standard Wattage 2000
Bore - mm (in.) 125 (4.92) Coolant Heater Standard Voltage 240VAC
Stroke - mm (in.) 140 (5.51)
Compression Ratio 16.5:1 Fuel System
Intake Air Method Turbocharged/Aftercooled Fuel Type Ultra Low Sulfur Diesel Fuel
Cylinder Head Type 4-Valve Fuel Specifications ASTM
Piston Type Aluminum Fuel Filtering (microns) 5
Crankshaft Type Dropped Forged Steel Fuel Inject Pump Make Electronic
Fuel Pump Type Engine Driven Gear
Engine Governing Injector Type Common Rail
Governor Electronic Isochronous Engine Type Direct Injection
Frequency Regulation (Steady State) ± 0.25% Fuel Supply Line - mm (in.) 12.7(½")
Fuel Return Line - mm (in.) 12.7(½")
Lubrication System
Oil Pump Type Gear Engine Electrical System
Oil Filter Type Full-Flow System Voltage 24VDC
Crankcase Capacity - L (qts) 30 (31.68) Battery Charging Alternator Std
Battery Size (at 0ºC) 1155 CCA
Battery Group 8D
Battery Voltage (2) - 12VDC
Ground Polarity Negative
ALTERNATOR SPECIFICATIONS
Standard Model 520 mm Generac Voltage Regulator Type Digital
Poles 4 Number of Sensed Phases All
Field Type Revolving Regulation Accuracy (Steady State) ± 0.25%
Insulation Class - Rotor H
Insulation Class - Stator H
Total Harmonic Distortion < 5%
Telephone Interference Factor (TIF) < 50
Standard Excitation Permanent Magnent
Bearings Single Sealed Cartridge
Coupling Direct, Flexible Disc
Load Capacity - Standby 100%
Prototype Short Circuit Test Yes
CODES AND STANDARDS COMPLIANCE (WHERE APPLICABLE) PARALLELING CONTROLS
NFPA 99 BS5514 AUTO-SYNCHRONIZATION PROCESS
NFPA 110 SAE J1349 ISOCHRONOUS LOAD SHARING
ISO 8528-5 DIN6271 REVERSE POWER PROTECTION
ISO 1708A.5 IEEE C62.41 TESTING MAXIMUM POWER PROTECTION
ISO 3046 NEMA ICS 1 ELECTRICALLY OPERATED, MECHANICALLY HELD PARALLELING SWITCH
UL2200 SYNC CHECK SYSTEM
INDEPENDENT ON-BOARD PARALLELING
OPTIONAL PROGRAMMABLE LOGIC FULL AUTO BACK-UP CONTROL (PLS)
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Rating Definitions:
Standby – Applicable for a varying emergency load for the duration of a utility power outage with no overload capability. (Max. load factor = 70%)
Prime – Applicable for supplying power to a varying load in lieu of utility for an unlimited amount of running time. (Max. load factor = 80%) A 10% overload capacity is available for 1 out of
every 12 hours.
MD300 application and engineering data
300 kW Diesel
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