Generac 450 kW Natural Gas Generator

MG450 | 21.9L | 450 kW

INDUSTRIAL SPARK-IGNITED GENERATOR SET
EPA Certified Stationary Emergency and Non-Emergency

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Standby Power Rating
450 kW, 562 kVA, 60 Hz

Demand Response Rating
450 kW, 562 kVA, 60 Hz

Prime Power Rating
405 kW, 506 kVA, 60 Hz

USA
450 kW Natural Gas Generator

Codes and Standards

Not all codes and standards apply to all configurations. Contact factory for details.

UL6200

UL2200, UL6200, UL1236, UL489

SA

CSA C22.2, B149

DIN

M BS5514 and DIN 6271

SAE

SAE J1349

NFPA

NFPA 37, 70, 99, 110

NEC

NEC700, 701, 702, 708

Nema

NEMA ICS10, MG1, 250, ICS6, AB1

ANSI (1)

ANSI C62.41

ICC

IBC 2009, CBC 2010, IBC 2012, ASCE 7-05, ASCE 7-10, ICC-ES AC-156 (2012)

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Power Gen Truck

Powering Ahead

Generac ensures superior quality by designing and manufacturing most of its generator components, such as alternators, enclosures, control systems and com- munications software. Generac also makes its own spark-ignited engines, and they can be found on every Generac gaseous-fueled generator. We engineer and manufacture them from the block up — all at our facili- ties throughout Wisconsin. Applying natural gas and LP- fueled engines to generators requires advanced engi- neering expertise to ensure reliability, durability and nec- essary performance. By designing specifically for these dry, hotter-burning fuels, the engines last longer and re- quire 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 owners 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 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 # 12
Type V12
Displacement - in³ (L) 1,336.4 (21.9)
Bore - in (mm) 5.03 (128)
Stroke - in (mm) 5.6 (142)
Compression Ratio 10.0:1
Intake Air Method Turbocharged/Aftercooled
Number of Main Bearings 7
Connecting Rods Steel Alloy
Cylinder Head Cast Iron
Cylinder Liners Cast Steel Alloy
Ignition Electronic
Piston Type Cast Aluminum Alloy
Crankshaft Type Steel
Lifter Type Solid
Intake Valve Material High Temperature Steel Alloy
Exhaust Valve Material High Temperature Steel Alloy
Hardened Valve Seats Proprietary Alloy
Lubrication System
Oil Pump Type Gear
Oil Filter Type Full-Flow Spin-On Cartridge
Engine Oil Capacity with Filter - qt (L) 31.7 (30)
Cooling System
Cooling System Type Pressurized Closed Recovery
Fan Type Pusher
Fan Speed (RPM) 1,404
Fan Diameter - in (mm) 44 (1,118)
Fuel System
Fuel Type Natural Gas
Carburetor Down Draft
Secondary Fuel Regulator Standard
Fuel Shutoff Solenoid Standard
Operating Fuel Pressure - in H2O (kPa) 11 - 14 (2.7 - 3.5)
Optional Operating Fuel Pressure - in H2O (kPa) 7 - 11 (1.7 - 2.7)
Engine Electrical System
System Voltage 24 VDC
Battery Charger Alternator 57 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 K0500124Y23
Poles 4
Field Type Revolving
Insulation Class - Rotor H
Insulation Class - Stator H
Total Harmonic Distortion <5%
Telephone Interference Factor (TIF) <52
Standard Excitation Permanent Magnet
Bearings 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 – NATURAL GAS

Standby/Demand Response Prime
Three-Phase 277/480 VAC @0.8pf 450 kW/563 kVA Amps: 677 405 kW/506 kVA Amps: 610
Three-Phase 346/600 VAC @0.8pf 450 kW/563 kVA Amps: 542 405 kW/506 kVA Amps: 488
MOTOR STARTING CAPABILITIES (skVA)
277/480 VAC 30%
K0500124Y23 1,020
K0600124Y23 1,560
FUEL CONSUMPTION RATES*
Percent Load Standby/Demand Response Prime
25% 1,800 (51.0) 1,740 (49.3)
50% 2,880 (81.6) 2,640 (74.8)
75% 3,360 (112.1) 3,600 (101.9)
100% 5,040 (142.7) 4,620 (130.8)
COOLING
Unit Standby/Demand Response Prime
Air Flow (Fan Air Flow Across Radiator) - Open Set scfm (m³/min) 28,004 (793) 28,004 (793)
Coolant Flow gpm (Lpm) 2111 (799) 2111 (799)
Coolant System Capacity gal (L) 15.5 (58.7) 15.5 (58.7)
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 Additional Radiator Backpressure in H2O (kPa) 0.5 (0.12) 0.5 (0.12)
COMBUSTION AIR REQUIREMENTS
Unit Standby/Demand Response Prime
Flow at Rated Power scfm (m³/min) 801 (22.7) 733 (20.8)
ENGINE
Unit Standby/Demand Response Prime
Rated Engine Speed rpm 1,800 1,800
Horsepower at Rated kW** hp 711 650
Piston Speed ft/min (m/min) 1,680 (512) 1,680 (512)
BMEP psi (kPa) 216 (1,489) 194 (1,340)
EXHAUST
Unit Standby/Demand Response Prime
Exhaust Flow (Rated Output) scfm (m³/min) 2,685 (76.0) 2,385 (67.5)
Maximum Allowable Backpressure (Post Silencer) in Hg (kPa) 0.75 (2.54) 0.75 (2.54)
Exhaust Temperature (Rated Output) °F (°C) 1,350 (732) 1,297 (703)

STANDARD FEATURES

ENGINE SYSTEM
  • Oil Drain Extension
  • Air Cleaner
  • Stainless Steel Flexible Exhaust Connection
  • Factory Filled Oil and Coolant
  • Critical Silencer (Open Set Only)
  • Radiator Duct Adapter (Open Set Only)
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
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ALTERNATOR SYSTEM

  • Battery Charging Alternator
  • Battery Cables
  • Battery Tray
  • Rubber-Booted Engine Electrical Connections
  • Solenoid Activated Starter Motor

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 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
  • 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
  • Arc Flash Maintenance Mode (When Correctly Equipped)
Control System

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

  • Auto-Synchronization Process
  • Isochronous Load Sharing
  • Reverse Power Protection
  • Maximum Power Protection
  • Electrically Operated, Mechanically Held Paralleling Switch
  • Sync Check System
  • Independent On-Board Paralleling
  • Optional Programmable Logic Full Auto Back-Up Controls (PLS)
  • Shunt Trip and Auxiliary Contact

ENGINEERED OPTIONS

CONTROL SYSTEM

  • Battery Disconnect Switch

GENERATOR SET

  • Special Testing
  • Battery Box

ENGINE SYSTEM

  • Coolant Heater Ball Valves
  • Fluid Containment Pans

CONFIGURABLE OPTIONS

ENGINE SYSTEM

  • Baseframe Cover/Rodent Guard
  • 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
  • Main Line Circuit Breaker
  • Electronic Trip Breakers

FUEL SYSTEM

  • NPT Flexible Fuel Line

GENERATOR SET

  • Demand Response Rating
  • Extended Factory Testing
  • 12 Position Load Center

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
  • Damper Alarm (with Motorized Dampers Only)
  • Up to 200 MPH Wind Load Rating (Contact Factory for Availability)
  • AC/DC Enclosure Lighting Kit
  • Enclosure Heaters (with Motorized Dampers Only)
  • Door Open Alarm Switch

CONTROL SYSTEM

  • 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)
  • 10A Engine Run Relay
  • Ground Fault Annunciator
  • 100 dB Alarm Horn
  • 120V GFCI and 240V Outlets

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