MG300 | 14.2L | 300 kW
INDUSTRIAL SPARK-IGNITED GENERATOR SET
EPA Certified Stationary Emergency and Non-Emergency
Standby Power Rating
300 kW, 375 kVA, 60 Hz
Demand Response Rating
300 kW, 375 kVA, 60 Hz
Prime Power Rating*
270 kW, 338 kVA, 60 Hz
Codes and Standards
Not all codes and standards apply to all configurations. Contact factory for details.
UL2200, UL6200, UL1236, UL489
CSA C22.2, B149
M BS5514 and DIN 6271
SAE J1349
NFPA 37, 70, 99, 110
NEC700, 701, 702, 708
NEMA ICS10, MG1, 250, ICS6, AB1
ANSI C62.41
ISO 3046, 7637, 8528, 9001
IBC 2009, CBC 2010, IBC 2012, ASCE 7-05, ASCE 7-10, ICC-ES AC- 156 (2012)
Powering Ahead
Generac ensures superior quality by designing and manufacturing most of its generator components, such as alternators, enclosures, control systems and communications software. Generac also makes its own spark ignited engines, and you’ll find them on every Generac gaseous-fueled generator. We engineer and manufacture them from the block up — all at our facilities throughout Wisconsin. Applying natural gas and LP-fueled engines to generators requires advanced engineering expertise to ensure reliability, durability and necessary performance. By designing specifically for these dry, hotter-burning fuels, the engines last longer and require less maintenance. Building our own engines also means we control every step of the supply chain and delivery process, so you benefit from single source responsibility. Plus, Generac Industrial Power’s distribution network provides all parts and service so you don’t have to deal with third-party suppliers. It all leads to a positive owner experience and higher confidence level. Generac spark-ignited engines give you more options in commercial and industrial generator applications as well as extended run time from utility-supplied natural gas.
APPLICATION AND ENGINEERING DATA
ENGINE SPECIFICATIONS
General
| Make | Generac |
| Cylinder # | 6 |
| Type | In-line |
| Displacement - in³ (L) | 864.71 (14.2) |
| Bore - in (mm) | 5.31 (135) |
| Stroke - in (mm) | 6.50 (165) |
| Compression Ratio | 9.5:1 |
| Intake Air Method | Turbocharged/Aftercooled |
| Number of Main Bearings | 7 |
| Connecting Rods | Steel Alloy |
| Cylinder Head | Cast Iron |
| Cylinder Liners | Ductile Iron |
| Ignition | Electronic |
| Piston Type | Aluminum |
| Crankshaft Type | Ductile Iron |
| Lifter Type | Solid |
| Intake Valve Material | Special Heat-Resistant Steel |
| Exhaust Valve Material | High Temp Steel Alloy |
| Hardened Valve Seats | High Temp Steel Alloy |
Lubrication System
| Oil Pump Type | Gear |
| Oil Filter Type | Full-Flow with Cartridge |
| Crankcase Capacity - qt (L) | 36.2 (34.3) |
Cooling System
| Cooling System Type | Pressurized Closed Recovery |
| Fan Type | Pusher |
| Fan Speed - RPM | 1,894 |
| Fan Diameter - in (mm) | 34 (864) |
Fuel System
| Fuel Type | Natural Gas |
| Carburetor | Down Draft |
| Secondary Fuel Regulator | Standard |
| Fuel Shut Off Solenoid | Standard |
| Operating Fuel Pressure - in H2O (kPa) | 7 - 11 (1.7 - 2.7) |
Engine Electrical System
| System Voltage | 24 VDC |
| Battery Charger Alternator | 57.5 A |
| Battery Size | See Battery Index 0161970SBY |
| Battery Voltage | (2) - 12 VDC |
| Ground Polarity | Negative |
Engine Governing
| Governor | Electronic |
| Frequency Regulation (Steady State) | ±0.25% |
ALTERNATOR SPECIFICATIONS
| Standard Model | K0300124Y21 |
| Poles | 4 |
| Field Type | Revolving |
| Insulation Class - Rotor | H |
| Insulation Class - Stator | H |
| Total Harmonic Distortion | <5% |
| Telephone Interference Factor (TIF) | <50 |
| Standard Excitation | Permanent Magnet |
| Bearings | Single Sealed Ball |
| Coupling | Direct via Flexible Disc |
| Prototype Short Circuit Test | Yes |
| Voltage Regulator Type | Full Digital |
| Number of Sensed Phases | All |
| Regulation Accuracy (Steady State) | ±0.25% |
OPERATING DATA
POWER RATINGS
General
| Standby/Demand Response | Prime | |
|---|---|---|
| Three-Phase 120/208 VAC @0.8pf | 300 kW/375 kVA Amps: 1,042 | 270 kW/338 kVA Amps: 938 |
| Three-Phase 277/480 VAC @0.8pf | 300 kW/375 kVA Amps: 452 | 270 kW/338 kVA Amps: 406 |
| Three-Phase 346/600 VAC @0.8pf | 300 kW/375 kVA Amps: 361 | 270 kW/338 kVA Amps: 325 |
MOTOR STARTING CAPABILITIES (skVA)
| 277/480 VAC | 30% | 208/240 VAC | 30% |
|---|---|---|---|
| K0300124Y21 | 790 | K0300124Y21 | 609 |
FUEL CONSUMPTION RATES*
| Percent Load | Standby/Demand Response | Prime |
|---|---|---|
| 25% | 1,260 (35.7) | 1,200 (34.0) |
| 50% | 1,980 (56.1) | 1,860 (52.7) |
| 75% | 2,700 (76.5) | 2,460 (69.7) |
| 100% | 3,420 (96.8) | 3,120 (88.3) |
COOLING
| Unit | Standby/Demand Response | Prime | |
|---|---|---|---|
| Air Flow (Fan Air Flow Across Radiator) | scfm (m³/min) | 15,946 (451.5) | 15,946 (451.5) |
| Coolant Flow | gpm (Lpm) | 90 (340.7) | 90 (340.7) |
| Coolant System Capacity | gal (L) | 15.4 (58.3) | 15.4 (58.3) |
| Maximum Operating Ambient Temperature | °F (°C) | 122 (50) | 122 (50) |
| Maximum Operating Ambient Temperature (Before Derate) | See Bulletin No. 0199270SSD | See Bulletin No. 0199270SSD | |
| Maximum Radiator Backpressure | in H2O (kPa) | 0.5 (0.12) | 0.5 (0.12) |
COMBUSTION AIR REQUIREMENTS
| Standby/Demand Response | Prime | |
|---|---|---|
| Flow at Rated Power scfm (m³/min) | 540 (15.3) | 497 (14.1) |
ENGINE
| Unit | Standby/Demand Response | Prime | |
|---|---|---|---|
| Rated Engine Speed | RPM | 1,800 | 1,800 |
| Horsepower at Rated kW** | hp | 448 | 403 |
| Piston Speed | ft/min (m/min) | 1,950 (594) | 1,950 (594) |
| BMEP | psi (kPa) | 227 (1,568) | 205 (1,411) |
EXHAUST
| Unit | Standby/Demand Response | Prime | |
|---|---|---|---|
| Exhaust Flow (Rated Output) | scfm (m³/min) | 1,875 (53) | 1,698 (48) |
| Maximum Allowable Back Pressure (Post Silencer) | inHg (kPa) | 0.75 (2.54) | 0.75 (2.54) |
| Exhaust Temp (Rated Output - Post Silencer) | °F (°C) | 1,415 (768) | 1,385 (752) |
STANDARD FEATURES
ENGINE SYSTEM
- Oil Drain Extension
- Air Cleaner
- Fan Guard (Open Set Only)
- Stainless Steel Flexible Exhaust Connection
- Factory Filled Oil and Coolant
- Radiator Duct Adapter (Open Set Only)
- Critical Silencer (Open Set Only)
- Coolant Heater Ball Valves
- Oil Temperature Sender with Indication Alarm
FUEL SYSTEM
- NPT Fuel Connection on Frame
- Primary and Secondary Fuel Shutoff
COOLING SYSTEM
- Closed Coolant Recovery System
- UV/Ozone Resistant Hoses
- Factory-Installed Radiator
- 50/50 Ethylene Glycol Antifreeze
- Radiator Drain Extension
ALTERNATOR SYSTEM
- Battery Charging Alternator
- Battery Cables
- Battery Tray
- Rubber-Booted Engine Electrical Connections
- Solenoid Activated Starter Motor
ALTERNATOR SYSTEM
- UL2200 GENprotect™
- Motorized Main Line Circuit Breaker
- Class H Insulation Material
- 2/3 Pitch
- Skewed Stator
- Permanent Magnet Excitation
- Sealed Bearings
- Amortisseur Winding
- Full Load Capacity Alternator
GENERATOR SET
- Internal Genset Vibration Isolation
- Separation of Circuits – High/Low Voltage
- Separation of Circuits – Multiple Breakers
- Wrapped Exhaust Piping
- Standard Factory Testing
- 2 Year Limited Warranty (Standby and Demand Response Rated Units)
- 1 Year Limited Warranty (Prime Rated Units)
- Silencer Mounted in the Discharge Hood (Enclosed Units Only)
ENCLOSURE (If Selected)
- Rust-Proof Fasteners with Nylon Washers to Protect Finish
- High Performance Sound-Absorbing Material (Sound Attenuated Enclosures)
- Gasketed Doors
- Upward Facing Discharge Hood (Radiator and Exhaust)
- Stainless Steel Lift Off Door Hinges
- Stainless Steel Lockable Handles
- RhinoCoat™ - Textured Polyester Powder Coat Paint
CONTROL SYSTEM
- Remote Wireless Software Update Capable
- Wi-Fi®, Bluetooth®, BMS and Remote Telemetry
- Built-In Programmable Logic Eliminates the Need for External Controllers Under Most Conditions
- Ethernet Based Communications Between Generators
- Programmable I/O Channel Properties
- Built-In Diagnostics
Power Zone® Pro Sync Controller
- NFPA 110 Level 1 Compliant
- Engine Protective Functions
- Alternator Protective Functions
- Digital Engine Governor Control
- Digital Voltage Regulator
- Multiple Programmable Inputs and Outputs
- Remote Display Capability
- Remote Communication via Modbus® RTU, Modbus TCP/IP, and Ethernet 10/100
- Alarm and Event Logging with Real Time Stamping
- Expandable Analog and Digital Inputs and Outputs
Alarms and Warnings
- Low Oil Pressure
- Low Coolant Level
- High/Low Coolant Temperature
- Sensor Failure
- Oil Temperature
- Over/Under Speed
- Over/Under Voltage
- Over/Under Frequency
- Over/Under Current
- Over Load
- High/Low Battery Voltage
- Battery Charger Current
- Phase to Phase and Phase to Neutral Short Circuits (I2T Algorithm)
7 Inch Color Touch Screen Display
- Resistive Color Touch Screen
- Sunlight Readable (1400 NITS)
- Easily Identifiable Icons
- Multi-Lingual
- On Screen Editable Parameters
- Key Function Monitoring
- Three Phase Voltage, Amperage, kW, kVA, and kVAr
- Selectable Line to Line or Line to Neutral Measurements
- Frequency
- Engine Speed
- Engine Coolant Temperature
- Engine Oil Pressure
- Engine Oil Temperature
- Battery Voltage
- Hourmeter
- Warning and Alarm Indication
- Diagnostics
- Maintenance Events/Information
PARALLELING CONTROLS
- Paralleling Control (Synchronizing)
- Loss of Synchronization Between Gensets
- Reverse Power
- Load and VAR Sharing
ENGINEERED OPTIONS
CONTROL SYSTEM
- Battery Disconnect Switch
GENERATOR SET
- Special Testing
- Battery Box
ALTERNATOR SYSTEM
- 2nd Breaker System
ENGINE SYSTEM
- Fluid Containment Pan
CONFIGURABLE OPTIONS
ENGINE SYSTEM
- Engine Coolant Heater
- Baseframe Cover/Rodent Guard
- Two Stage Air Cleaner
- Oil Heater
- Air Filter Restriction Indicator
- Radiator Stone Guard (Open Set Only)
- Level 1 Fan and Belt Guards (Enclosed Units Only)
ALTERNATOR SYSTEM
- Alternator Upsizing
- Anti-Condensation Heater
- Tropical Coating
ELECTRICAL SYSTEM
- 10A UL Listed Battery Charger
- Battery Warmer
CIRCUIT BREAKER OPTIONS
- Shunt Trip and Auxiliary Contact
- Electronic Trip Breakers
GENERATOR SET
- Demand Response Rating
- 12 Position Load Center
- Extended Factory Testing
- Vapor Recovery Heater
CONTROL SYSTEM
- NFPA 110 Level 1 Compliant 21-Light Remote Annunciator
- Remote Output Relays (8 or 16)
- Remote E-Stop (Break Glass-Type, Surface Mount)
- Remote E-Stop (Red Mushroom-Type, Surface Mount)
- Remote E-Stop (Red Mushroom-Type, Flush Mount)
- 10A Engine Run Relay
- Ground Fault Annunciator
- 120V GFCI and 240V Outlets
- Damper Alarm Contacts (With Motorized Dampers Only)
- 100 dB Alarm
- Permissive/Load Shed Module
ENCLOSURE
- Weather Protected Enclosure
- Level 1 Sound Attenuated
- Level 2 Sound Attenuated
- Level 2 Sound Attenuated with Motorized Dampers
- Level 3 Sound Attenuated (Steel Only)
- Steel Enclosure
- Aluminum Enclosure
- Up to 200 mph Wind Load Rating (Contact Factory for Availability)
- AC/DC Enclosure Lighting Kit
- Enclosure Heaters (Motorized Dampers Only)
- IBC Certification
- Door Open Alarm Switch
WARRANTY (Standby Gensets Only)
- 2 Year Extended Limited Warranty
- 5 Year Limited Warranty
- 5 Year Extended Limited Warranty
- 7 Year Extended Limited Warranty
- 10 Year Extended Limited Warranty
FUEL SYSTEM
- NPT Flexible Fuel Line