Generac Power Systems MD300 User manual

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Industrial Diesel Generator Set
EPA Certified Stationary Emergency
300 kW Diesel
Standby Power Rating
375kVA 300kW 60Hz
Prime Power Rating*
338kVA 270KW 60Hz
features benefits
primary codes and standards
Generator Set
=PROTOTYPE & TORSIONALLY TESTED 4PROVIDES A PROVEN UNIT
=UL2200 TESTED 4ENSURES A QUALITY PRODUCT
=RHINOCOAT PAINT SYSTEM 4IMPROVES RESISTANCE TO ELEMENTS
=WIDE RANGE OF ENCLOSURES AND TANKS 4PROVIDES A SINGLE SOURCE SOLUTION
Engine
=EPA COMPLIANT 4ENVIRONMENTALLY FRIENDLY
=INDUSTRIAL TESTED, GENERAC APPROVED 4ENSURES INDUSTRIAL STANDARDS
=POWER-MATCHED OUTPUT 4ENGINEERED FOR PERFORMANCE
=INDUSTRIAL GRADE 4IMPROVES LONGEVITY AND RELIABILITY
Alternator
=TWO-THIRDS PITCH 4ELIMINATES HARMFUL 3RD HARMONIC
=LAYER WOUND ROTOR & STATOR 4IMPROVES COOLING
=CLASS H MATERIALS 4HEAT TOLERANT DESIGN
=DIGITAL 3-PHASE VOLTAGE CONTROL 4FAST AND ACCURATE RESPONSE
Controls
=ENCAPSULATED BOARD W/ SEALED HARNESS 4EASY, AFFORDABLE REPLACEMENT
=4-20mA VOLTAGE-TO-CURRENT SENSORS 4NOISE RESISTANT 24/7 MONITORING
=SURFACE-MOUNT TECHNOLOGY 4PROVIDES VIBRATION RESISTANCE
=ADVANCED DIAGNOSTICS & COMMUNICATIONS 4HARDENED RELIABILITY
*EPA Certified Prime ratings are not available in the U.S. or its Territories for engine model year 2011 and beyond
Generator image used for illustration purposes only
MD300
PARALLELING UNIT

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

Deration – Operational characteristics consider maximum ambient conditions. Derate factors may apply under atypical site conditions. Please consult a Generac Power Systems Industrial
Dealer for additional details. All performance ratings in accordance with ISO3046, BS5514, ISO8528 and DIN6271 standards.
POWER RATINGS (kW)
STARTING CAPABILITIES (sKVA)
FUEL
COOLING
COMBUSTION AIR REQUIREMENTS
ENGINE EXHAUST
STANDBY PRIME
Three-Phase 120/208VAC @0.8pf 288 kW Amps: 1000 270 kW Amps: 937
Three-Phase 277/480VAC @0.8pf 300 kW Amps: 451 270 kW Amps: 406
Three-Phase 346/600VAC @0.8pf 300 kW Amps: 361 270 kW Amps: 325
sKVA vs. Voltage Dip
480VAC 208/240VAC
Alternator kW 10% 15% 20% 25% 30% 35% 10% 15% 20% 25% 30% 35%
Standard 300 303 454 605 757 908 1059 227 341 454 568 681 794
Upsize 1 400 387 581 775 968 1162 1356 345 570 835 1100 1450 1710
Upsize 2 500 457 686 914 1143 1371 1600 - - - - - -
Fuel Consumption Rates*
STANDBY PRIME
Fuel Pump Lift - in (mm) Percent Load gph lph Percent Load gph lph
36 (900) 25% 7.6 28.7 25% 6.9 26.1
50% 12.6 47.7 50% 11.6 43.9
Total Fuel Pump Flow (Combustion + Return) 75% 17.4 65.9 75% 15.8 59.8
31 gph 100% 22.1 83.7 100% 19.9 75.3
* Refer to "Emissions Data Sheet" for maximum fuel flow for EPA and SCAQMD permitting purposes.
STANDBY PRIME
Coolant Flow per Minute gpm (lpm) 95 (360) 95 (360)
Heat Rejection to Coolant BTU/hr 814,783 733,673
Inlet Air cfm (m3/min) 14,505 (411) 14,505 (411)
Max. Operating Radiator Air Temp Fº (Cº) 122 (50) 122 (50)
Max. Operating Ambient Temperature Fº (Cº) 104 (40) 104 (40)
Coolant System Capacity gal (L) 16.6 (63) 16.6 (63)
Maximum Radiator Backpressure in H2O 1.5 1.5
STANDBY PRIME
Flow at Rated Power cfm (m3/min) 850 (24.07) 765 (21.67)
STANDBY PRIME
Rated Engine Speed rpm 1800 1800
Horsepower at Rated kW** hp 480 432
Piston Speed ft/min 1654 1654
BMEP psi 336 302
** Refer to “Emissions Data Sheet” for maximum bHP for EPA and SCAQMD permitting purposes.
STANDBY PRIME
Exhaust Flow (Rated Output) cfm (m3/min) 2240 (63.4) 2016 (57.1)
Max. Backpressure (Post Silencer) inHg (Kpa) 1.5 (5.1) 1.5 (5.1)
Exhaust Temp (Rated Output) ºF (ºC) 1020 (549) 918 (492)
Exhaust Outlet Size (Open Set) NPT (male) 101.6 (4) 101.6 (4)
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MD300 operating data (60Hz)
300 kW Diesel

GENERATOR SET
Genset Vibration Isolation Std
IBC Seismic Certified/Seismic Rated Vibration Isolators Opt
Extended warranty Opt
Gen-Link Communications Software Opt
Steel Enclosure Opt
Aluminum Enclosure Opt
Enclosure Lighting Kits Opt
ENGINE SYSTEM
General
Oil Drain Extension Std
Oil Make-Up System Opt
Oil Heater Opt
Air cleaner Std
Fan guard Std
Radiator duct adapter Std
Industrial Exhaust Silencer Std
Critical Exhaust Silencer Opt
Fuel System
Fuel lockoff solenoid Std
Secondary fuel filter Std
Stainless steel flexible exhaust connection Std
Flexible fuel lines Opt
Primary fuel filter Opt
Single Wall Tank (Export Only) -
UL 142 Fuel Tank Opt
Cooling System
120VAC Coolant Heater Opt
208VAC Coolant Heater Opt
240VAC Coolant Heater Std
Other Coolant Heater -
Closed Coolant Recovery System Std
UV/Ozone resistant hoses Std
Factory-Installed Radiator Std
Radiator Drain Extension Std
Engine Electrical System
Battery charging alternator Std
Battery cables Std
Battery tray Std
Battery box Opt
Battery heater Opt
Solenoid activated starter motor Std
10A UL float/equalize battery charger Opt
Rubber-booted engine electrical connections Std
ALTERNATOR SYSTEM
UL2200 GENprotect™ Std
Main Line Circuit Breaker (Output connections on paralleling switch) Std
Alternator Upsizing Opt
Anti-Condensation Heater Opt
Tropical coating Opt
Permanent Magnet Generator Std
CONTROL SYSTEM
Control Panel
Digital H Control Panel - Dual 4x20 Display na
Digital G-100 Control Panel - Touchscreen na
Digital G-200 Paralleling Control Panel - Touchscreen Std
Programmable Crank Limiter Std
21-Light Remote Annunciator Opt
Remote Relay Panel (8 or 16) Opt
7-Day Programmable Exerciser Std
Special Applications Programmable PLC Std
RS-232 Std
RS-485 Std
All-Phase Sensing DVR Std
Full System Status Std
Utility Monitoring (Req. H-Transfer Switch) Std
2-Wire Start Compatible Std
Power Output (kW) Std
Power Factor Std
Reactive Power Std
All phase AC Voltage Std
All phase Currents Std
Oil Pressure Std
Coolant Temperature Std
Coolant Level Std
Oil Temperature Opt
Fuel Pressure Std
Engine Speed Std
Battery Voltage Std
Frequency Std
Date/Time Fault History (Event Log) Std
Low-Speed Exercise -
Isochronous Governor Control Std
-40deg C - 70deg C Operation Std
Waterproof Plug-In Connectors Std
Audible Alarms and Shutdowns Std
Not in Auto (Flashing Light) Std
Auto/Off/Manual Switch Std
E-Stop (Red Mushroom-Type) Std
Remote E-Stop (Break Glass-Type, Surface Mount) Opt
Remote E-Stop (Red Mushroom-Type, Surface Mount) Opt
Remote E-Stop (Red Mushroom-Type, Flush Mount) Opt
NFPA 110 Level I and II (Programmable) Std
Remote Communication - RS232 Std
Remote Communication - Modem Opt
Remote Communication - Ethernet Opt
PLS Full Auto Back-Up for PM-SC Opt
Alarms (Programmable Tolerances, Pre-Alarms and Shutdowns)
Low Fuel Opt
Oil Pressure (Pre-programmed Low Pressure Shutdown) Std
Coolant Temperature (Pre-programmed High Temp Shutdown) Std
Coolant Level (Pre-programmed Low Level Shutdown) Std
Oil Temperature Std
Engine Speed (Pre-programmed Overspeed Shutdown) Std
Voltage (Pre-programmed Overvoltage Shutdown) Std
Battery Voltage Std
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MD300 standard features and options
300 kW Diesel

LW
H
LW
H
LW
H
LW
H
OPEN SET
RUN TIME HOURS USABLE CAPACITY (GAL) L W H WT dBA*
NO TANK - 136 58 68 6088
89
8 183 136 58 81 7036
20 438 136 58 93 7348
31 693 136 58 105 7651
43 946 208 58 108 9295
60 1325 278 58 108 10128
STANDARD ENCLOSURE
RUN TIME HOURS USABLE CAPACITY (GAL) L W H WT dBA*
NO TANK - 175 58 78 8106
84
8 183 175 58 91 9054
20 438 175 58 103 9366
31 693 175 58 115 9669
43 946 208 58 118 11313
60 1325 278 58 118 12146
LEVEL 1 ACOUSTIC ENCLOSURE
RUN TIME HOURS USABLE CAPACITY (GAL) L W H WT dBA*
NO TANK - 200 58 78 8479
78
8 183 200 58 91 9427
20 438 200 58 103 9739
31 693 200 58 115 10042
43 946 234 58 118 11686
60 1325 304 58 118 12519
LEVEL 2 ACOUSTIC ENCLOSURE
RUN TIME HOURS USABLE CAPACITY (GAL) L W H WT dBA*
NO TANK - 181 58 107 7988
75
8 183 181 58 120 8936
20 438 181 58 132 9248
31 693 181 58 144 9551
43 946 208 58 147 11195
60 1325 278 58 147 12028
Tank Options
MDEQ OPT
Florida DERM/DEP OPT
Chicago Fire Code OPT
IFC Certification CALL
ULC CALL
Other Custom Options Available from your Generac Industrial Power Dealer
*All measurements are approximate and for estimation purposes only. Weights are without fuel in tank. Sound levels measured at 23ft (7m) and does not account for ambient site conditions.
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MD300 dimensions, weights and sound levels
YOUR FACTORY RECOGNIZED GENERAC INDUSTRIAL DEALER
Generac Power Systems, Inc. • S45 W29290 HWY. 59, Waukesha, WI 53189 • generac.com
©2012 Generac Power Systems, Inc. All rights reserved. All specifications are subject to change without notice. Bulletin 0185630SBY-C / Printed in U.S.A. 02/28/12
Specification characteristics may change without notice. Dimensions and weights are for preliminary purposes only. Please consult a Generac Power Systems Industrial Dealer for detailed installation drawings.
300 kW Diesel