Generac SG300 12.9L Industrial Generator Set
EPA Certified Stationary Emergency
Power Ratings
Standby Power Rating: 300 kW / 375 kVA @ 60 Hz
Prime Power Rating*: 270 kW / 338 kVA @ 60 Hz
*EPA Certified Prime ratings are not available in the U.S. or its Territories.
Image used for illustration purposes only.
Codes and Standards
Generac products are designed to the following standards:
- UL2200, UL508, UL142, UL498
- NFPA70, 99, 110, 37
- NEC700, 701, 702, 708
- ISO9001, 8528, 3046, 7637, Pluses #2b, 4
- NEMA ICS10, MG1, 250, ICS6, AB1
- ANSI C62.41
- IBC 2009, CBC 2010, IBC 2012, ASCE 7-05, ASCE 7-10, ICC-ES AC-156 (2012)
Powering Ahead
For over 50 years, Generac has led the industry with innovative design and superior manufacturing. Generac ensures superior quality by designing and manufacturing most of its generator components, including alternators, enclosures and base tanks, control systems and communications software. Generac's gensets utilize a wide variety of options, configurations and arrangements, allowing us to meet the standby power needs of practically every application. Generac searched globally to ensure the most reliable engines power our generators. We choose only engines that have already been proven in heavy-duty industrial application under adverse conditions. Generac is committed to ensuring our customers' service support continues after their generator purchase.
Standard Features
Engine System
- General: Oil Drain Extension, Air Cleaner, Fan Guard, Stainless Steel flexible exhaust connection, Critical Exhaust Silencer, Factory Filled Oil, Radiator duct adapter (open set only).
- Fuel System: Primary and Secondary Fuel Shutoff, Flexible Fuel Line - NPT Connection.
- Cooling System: Closed Coolant Recovery System, UV/Ozone resistant hoses, Factory-installed Radiator, Radiator drain extension, 50/50 Ethylene glycol antifreeze.
- Engine Electrical System: Battery charging alternator, Battery Cables, Battery Tray, Solenoid activated starter motor, Rubber-booted engine electrical connections.
Alternator System
- UL2200 GENprotect™
- 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 rated Units)
- 1 Year Warranty (Prime rated units)
- Silencer mounted in the discharge hood (enclosed only)
Enclosure (if selected)
- Rust-proof fasteners with nylon washers to protect finish
- High performance sound-absorbing material
- Gasketed doors
- Stamped air-intake louvers
- Air discharge hoods for radiator-upward pointing
- Stainless steel lift off door hinges
- Stainless steel lockable handles
- Rhino Coat™ - Textured polyester powder coat
Control System
- Control Panel: Digital H Control Panel - Dual 4x20 Display, Programmable Crank Limiter, 7-Day Programmable Exerciser, Special Applications Programmable PLC, RS-232/485, All-Phase Sensing DVR, Full System Status, Utility Monitoring, Low Fuel Pressure Indication, 2-Wire Start Compatible.
- Parameters Monitored: Power Output (kW), Power Factor, kW Hours, Total & Last Run, Real/Reactive/Apparent Power, All Phase AC Voltage, All Phase Currents, Oil Pressure, Coolant Temperature, Coolant Level, Engine Speed, Battery Voltage, Frequency.
- Fault History: Date/Time Fault History (Event Log).
- Governor Control: Isochronous Governor Control.
- Connectivity: Waterproof/sealed Connectors.
- Alarms & Shutdowns: Audible Alarms and Shutdowns, Not in Auto (Flashing Light), Auto/Off/Manual Switch, E-Stop (Red Mushroom-Type).
- Compliance: NFPA110 Level I and II (Programmable).
- Customization: Customizable Alarms, Warnings, and Events.
- Communication: Modbus protocol.
- Maintenance: Predictive Maintenance algorithm.
- Security: Sealed Boards, Password parameter adjustment protection.
- Data Logging: Single point ground, 15 channel data logging, 0.2 msec high speed data logging.
- Display: Alarm information automatically comes up on the display.
- Specific Alarms: Oil Pressure (Pre-programmable Low Pressure Shutdown), Coolant Temperature (Pre-programmed High Temp Shutdown), Coolant Level (Pre-programmed Low Level Shutdown), Low Fuel Pressure Alarm, Engine Speed (Pre-programmed Over speed Shutdown), Battery Voltage Warning.
- Alarm Logging: Alarms & warnings time and date stamped, Alarms & warnings for transient and steady state conditions, Snap shots of key operation parameters during alarms & warnings, Alarms and warnings spelled out (no alarm codes).
Configurable Options
Engine System
- General: Engine Block Heater, Oil Heater, Air Filter Restriction Indicator, Stone Guard (Open Set Only).
- Engine Electrical System: 10A UL battery charger, Battery Warmer.
Alternator System
- Alternator Upsizing
- Anti-Condensation Heater
- Tropical coating
Generator Set
- Gen-Link Communications Software (English Only)
- Extended Factory Testing (3 Phase Only)
- IBC Seismic Certification
- 8 Position Load Center
- 2 Year Extended Warranty
- 5 Year Warranty
- 5 Year Extended Warranty
Circuit Breaker Options
- Main Line Circuit Breaker
- 2nd Main Line Circuit Breaker
- Shunt Trip and Auxiliary Contact
- Electronic Trip Breakers
Enclosure
- Standard Enclosure
- Level 1 Sound Attenuation
- Level 2 Sound Attenuation
- Steel Enclosure
- Aluminum Enclosure
- 150 MPH Wind Kit
- 12 VDC Enclosure Lighting Kit
- 120 VAC Enclosure Lighting Kit
- AC/DC Enclosure Lighting Kit
- Door Alarm Switch
Control System
- 21-Light Remote Annunciator
- Remote Relay Panel (8 or 16)
- Oil Temperature Sender with Indication Alarm
- Remote E-Stop (Break Glass-Type, Surface Mount)
- Remote E-Stop (Red Mushroom-Type, Surface Mount)
- Remote E-Stop (Red Mushroom-Type, Flush Mount)
- Remote Communication - Modem
- Remote Communication - Ethernet
- 10A Run Relay
- Ground fault indication and protection functions
Engineered Options
Engine System
- Coolant heater ball valves
- Fluid containment pans
Alternator System
- 3rd Breaker Systems
Generator Set
- Special Testing
Enclosure
- Motorized Dampers
- Enclosure Ambient Heaters
Control System
- Spare inputs (x4) / outputs (x4) - H Panel Only
- Battery Disconnect Switch
Rating Definitions
Standby: Applicable for a varying emergency load for the duration of a utility power outage with no overload capability.
Prime: Applicable for supplying power to a varying load in lieu of utility for an unlimited amount of running time. A 10% overload capacity is available for 1 out of every 12 hours. The Prime Power option is only available on International applications.
Power ratings in accordance with ISO 8528-1, Second Edition dated 2005-06-01, definitions for Prime Power (PRP) and Emergency Standby Power (ESP).
Engine Specifications
| Category | Specification | Details |
|---|---|---|
| General | Make | Generac |
| Cylinder # | 6 | |
| Type | In-line | |
| Displacement - L (Cu In) | 12.88 (785.99) | |
| Bore - mm (in) | 135 (5.31) | |
| Stroke - mm (in) | 150 (5.91) | |
| Compression Ratio | 10.1:1 | |
| Intake Air Method | Turbocharged/Aftercooled | |
| Number of Main Bearings | 7 | |
| Connecting Rods | Carbon Steel | |
| Cylinder Head | Cast Iron GT250, OHV | |
| Cylinder Liners | Ductile Iron | |
| Ignition | Altronic CD1 | |
| Pistons | Aluminum | |
| Crankshaft | Ductile Iron | |
| Lifter Type | Solid | |
| Intake Valve Material | Special Heat-Resistant Steel | |
| Exhaust Valve Material | Alloy Steel, High Temp | |
| Hardened Valve Seats | Alloy Steel, High Temp | |
| Engine Governing | Governor | Electronic |
| Frequency Regulation (Steady State) | +/- 0.25% |
| Category | Specification | Details |
|---|---|---|
| Lubrication System | Oil Pump Type | Gear |
| Oil Filter Type | Full-flow Cartridge | |
| Crankcase Capacity - L (qts) | 34.3 (36.2) | |
| Cooling System | Cooling System Type | Pressurized Closed Recovery |
| Water Pump Flow - gpm (lpm) | 94 (356) | |
| Fan Type | Pusher | |
| Fan Speed (rpm) | 2250 | |
| Fan Diameter mm (in) | 863 (34) | |
| Coolant Heater Wattage | 2000 | |
| Coolant Heater Standard Voltage | 240 V | |
| Fuel System | Fuel Type | Natural Gas |
| Carburetor | Down Draft | |
| Secondary Fuel Regulator | Standard | |
| Fuel Shut Off Solenoid | Standard (Dual) | |
| Operating Fuel Pressure | 11" - 15" H₂O | |
| Engine Electrical System | System Voltage | 24 VDC |
| Battery Charging Alternator | Standard | |
| Battery Size | See Battery Index 0161970SBY | |
| Battery Voltage | (2) 12 VDC | |
| Ground Polarity | Negative |
Alternator Specifications
| Specification | Details |
|---|---|
| Standard Model | 520 |
| 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 | Sealed Ball |
| Coupling | Direct, Flexible Disc |
| Prototype Short Circuit Test | Yes |
| Voltage Regulator Type | Full Digital |
| Number of Sensed Phases | 3 |
| Regulation Accuracy (Steady State) | +/- 0.25% |
Operating Data
Power Ratings (Natural Gas)
| Voltage | kW | Amps |
|---|---|---|
| Three-Phase 120/208 VAC @0.8pf | 300 kW | 1041 |
| Three-Phase 120/240 VAC @0.8pf | 300 kW | 902 |
| Three-Phase 277/480 VAC @0.8pf | 300 kW | 451 |
| Three-Phase 346/600 VAC @0.8pf | 300 kW | 361 |
Starting Capabilities (sKVA) vs. Voltage Dip
| Alternator | 480 VAC | 208/240 VAC | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
Fuel Consumption Rates (Natural Gas)
| Percent Load | Standby (ft³/hr) |
|---|---|
| 25% | 1968 (55) |
| 50% | 2857 (81) |
| 75% | 3625 (102) |
| 100% | 4621 (130) |
*Fuel supply installation must accommodate fuel consumption rates at 100% load.
Cooling
| Parameter | Standby |
|---|---|
| Air Flow (inlet air combustion and radiator) (ft³/min) | 19,668 (556.8) |
| Coolant Flow per Minute (gpm) | 94 (356) |
| Coolant System Capacity (gal) | 19 (71.9) |
| Heat Rejection to Coolant (BTU/hr) | 945,844 |
| Max. Operating Air Temp on Radiator (°F (°C)) | 122 (50) |
| Maximum Radiator Backpressure (in H₂O) | 0.5 |
Combustion Air Requirements
| Parameter | Standby |
|---|---|
| Flow at Rated Power (cfm) | 603 (17) |
Engine
| Parameter | Standby |
|---|---|
| Rated Engine Speed (rpm) | 2150 |
| Engine Horsepower** (hp) | 477 |
| Piston Speed (ft/min) | 2116 (645) |
| BMEP (psi) | 269 |
** Refer to "Emissions Data Sheet" for maximum bHP for EPA and SCAQMD permitting purposes.
Exhaust
| Parameter | Standby |
|---|---|
| Exhaust Flow (Rated Output) (cfm) | 2076 (59) |
| Maximum Recommended Back Pressure (inHg) | 1.5 |
| Exhaust Temp (Rated Output) (°F (°C)) | 1450 (788) |
| Exhaust Outlet Size (Open Set) (in) | 3.5" I.D. Flex (No Muffler) |
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.
Dimensions, Weights, and Sound Levels
Open Set (Includes Exhaust Flex)
Dimensions (L x W x H): 138.74 in (3524.1 mm) x 57.6 in (1463.1 mm) x 68.04 in (1728.3 mm)
Weight: 6612 lbs (2998 kg)
Sound Level: 90 dBA*
Standard Enclosure
Dimensions (L x W x H): 174.7 in (4437.4 mm) x 52.98 in (1345.7 mm) x 77.8 in (1976.1 mm)
Weight: Steel: 7786 lbs (3531 kg) / Aluminum: 7013 lbs (3180 kg)
Sound Level: 88 dBA*
Level 1 Acoustic Enclosure
Dimensions (L x W x H): 200.19 in (5084.7 mm) x 57.49 in (1460.4 mm) x 77.80 in (1976.1 mm)
Weight: Steel: 8342 lbs (3783 kg) / Aluminum: 7203 lbs (3266 kg)
Sound Level: 81 dBA*
Level 2 Acoustic Enclosure
Dimensions (L x W x H): 180.65 in (4588.4 mm) x 57.49 in (1460.4 mm) x 107.3 in (2725.4 mm)
Weight: Steel: 8904 lbs (4038 kg) / Aluminum: 7404 lbs (3357 kg)
Sound Level: 76 dBA*
*All measurements are approximate and for estimation purposes only. Sound levels measured at 23 ft (7 m) and does not account for ambient site conditions.
Contact Information
For detailed installation drawings or further information, please consult your factory-recognized Generac Industrial Dealer.
Generac Power Systems, Inc. • S45 W29290 HWY. 59, Waukesha, WI 53189 • generac.com
©2013 Generac Power Systems, Inc. All rights reserved.
