MG625 | 33.9L | 625 kW
INDUSTRIAL SPARK-IGNITED GENERATOR SET
EPA Certified Stationary Emergency and Non-Emergency
Standby Power Rating
625 kW, 781 kVA, 60 Hz
Prime Power Rating*
625 kW, 781 kVA, 60 Hz
*EPA Certified Prime ratings are not available in the US or its
Territories
Territories
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
Powering Ahead
Generac provides 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 they can be found 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 for 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 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 | 4 cycle |
| Displacement - in³ (L) | 2,068 (33.9) |
| Bore: in (mm) | 5.91 (150) |
| Stroke: in (mm) | 6.30 (160) |
| Compression ratio | 10.0:1 |
| Intake air method | Turbocharged/Aftercooled |
| Number of main bearings | 7 |
| Cylinder head | 4 Valve |
| Ignition | Electronic |
| Piston Type | Cast Aluminum Alloy |
| Crankshaft Type | Chromium Molybdenum Steel |
| Lifter Type | Solid |
| Intake Valve Material | Proprietary Alloy |
| Exhaust Valve Material | Proprietary Alloy |
| Hardened Valve Seats | Proprietary Alloy |
Lubrication System
| Oil Pump Type | Gear Driven |
| Oil Filter Type | Full Flow Spin-On Cartridge |
| Engine Oil Capacity with Filter: qt (L) | 126.8 (120) |
Cooling System
| Cooling System Type | Forced Circulation by Centrifugal Pump |
| Fan Type | Pusher |
| Fan Speed (rpm) | 1,080 |
| Fan Diameter - in (mm) | 64 (1,626) |
Fuel System
| Fuel Type | Natural Gas |
| Carburetor | Down Draft |
| Secondary Fuel Regulator | Standard |
| Fuel Shutoff Solenoid | Standard |
| Operating Fuel Pressure - in H2O (kPa) | 14–20 (3.5–5.0) |
*Operating fuel pressure measured at the generator fuel inlet located on the frame rail.
Engine Electrical System
| System Voltage | 24 VDC |
| Battery Charger | Alternator Standard |
| Battery Size | See battery index 0161970SBY |
| Battery Voltage (4) | 12 VDC |
| Ground Polarity | Negative |
Engine Governing
| Governor | Electronic |
| Frequency Regulation (Steady State) | ±0.25% |
ALTERNATOR SPECIFICATIONS
| Standard Model | K0732124Y22 |
| 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 |
| 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
| Three-Phase 120/208 VAC @0.8pf | 625 kW / 781 kVA | 2,171 |
| Three-Phase 120/240 VAC @0.8pf | 625 kW / 781 kVA | 1,882 |
| Three-Phase 277/480 VAC @0.8pf | 625 kW / 781 kVA | 941 |
| Three-Phase 346/600 VAC @0.8pf | 625 kW / 781 kVA | 753 |
MOTOR STARTING CAPABILITIES (SKVA)
| 208/240 VAC | 30% | K0820124Y22 | 1,900 |
| 120/208 VAC | 30% | K1000124Y22 | 3,900 |
| 277/480 VAC | 30% | K0732124Y22 | 2,450 |
| K0912124Y22 | 2,350 | K1220124Y22 | 3,250 |
| K0912124Y22 | 3,250 | K1000124Y22 | 2,300 |
| K1440124Y22 | 4,250 |
FUEL CONSUMPTION RATES*
| Percent Load | Standby/Demand Response |
|---|---|
| 25% | 2,725 (77.2) |
| 50% | 3,923 (111.1) |
| 75% | 5,944 (149.9) |
| 100% | 6,847 (193.9) |
COOLING
| Standby/Demand Response | ||
|---|---|---|
| Air Flow (Fan Air Flow Across Radiator) — Open Set | cfm (m³/min) | 34,000 (962.8) |
| Coolant Flow | gpm (Lpm) | 291 (1,101) |
| Coolant System Capacity | gal (L) | 55 (208) |
| Maximum Operating Ambient Temperature | °F (°C) | 122 (50) |
| Maximum Operating Ambient Temperature (Before Derate) | See Bulletin No.0199270SSD | |
| Maximum Radiator Backpressure | in H2O (kPa) | 0.5 (0.12) |
COMBUSTION AIR REQUIREMENTS
| Standby/Demand Response | |
|---|---|
| Flow at Rated Power | 1,394 cfm — (39.5 m³/min) |
ENGINE
| Standby | ||
|---|---|---|
| Rated Engine Speed | rpm | 1,800 |
| Horsepower at Rated | hp | 941 |
| Piston Speed | ft/min (m/min) | 1,890 (576) |
| BMEP | psi (kPa) | 226 (1,561) |
EXHAUST
| Standby | ||
|---|---|---|
| Exhaust Flow (Rated output) | cfm (m³/min) | 4,067 (115) |
| Maximum Allowable Back Pressure (Post Silencer) | in H2O(kPa) | 0.75 (2.54) |
| Exhaust Temp (Rated Output - Post Catalyst) | °F (°C) | 1,166 (630) |
STANDARD FEATURES
ENGINE SYSTEM
- Oil Drain Extension
- Heavy Duty Air Cleaner
- Level 1 Fan and Belt Guard (Open Set Only)
- Stainless Steel Flexible Exhaust Connection
- Factory Filled Oil and Coolant
- Radiator Duct Adapter (Open Set Only)
- Critical Silencer/Catalyst
- 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
- 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™
- Class H Insulation Material
- 2/3 Pitch
- Skewed Stator
- Permanent Magnet Excitation
- Sealed Bearings
- Amortisseur Winding
- Icon List Item
- Motorized Main Line Circuit Breaker
GENERATOR SET
- Spring Isolators Under Frame
- 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)
- Icon List Item
ENCLOSURE (If Selected)
- Structural Steel Sub-Base
- Sub-Base Lifting Eyes
- Enamel Finish
- Zinc Plated Fasteners
- Zinc Plated Cast Aluminum Keylock Door Handles
- Heavy Duty Stainless Steel Hinges with Removable Brass Pins
- Modular Construction
- 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)
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
- Additional Spare Inputs/Outputs
- Battery Disconnect Switch
GENERATOR SET
- Special Testing
- Battery Box
ALTERNATOR SYSTEM
- Unit Mounted Load Banks
- Medium Voltage Alternators
ENCLOSURE
- Door Open Alarm Horn
CONFIGURABLE OPTIONS
ENGINE SYSTEM
- Engine Coolant Heater
- Oil Heater
- Level 1 Fan and Belt Guards (Enclosed Units Only)
- Two Stage Air Cleaner
- Air Filter Restriction Indicator
- Radiator Stone Guard (Open Set Only)
- Shipped Loose Catalyst Silencer (Enclosed Units Only)
ALTERNATOR SYSTEM
- Alternator Upsizing
- Anti-Condensation Heater
ELECTRICAL SYSTEM
- 20A UL Listed Battery Charger
- Battery Warmer
CIRCUIT BREAKER
- Main Line Circuit Breaker
- Electronic Trip Breakers
GENERATOR SET
- Spring Vibration Isolator
- Extended Factory Testing
- 24 Position Load Center
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
- 100 dB Alarm
- 120V GFCI and 240V Outlets
- Permissive/Load Shed Module
- Damper Alarm Contacts (With Motorized Dampers Only)
ENCLOSURE
- Level 0 Sound Attenuated
- Level 1 Sound Attenuated
- Level 2 Sound Attenuated
- Level 1 Sound Attenuated with Motorized Dampers
- Level 2 Sound Attenuated with Motorized Dampers
- Steel Enclosure
- Aluminum Enclosure
- AC Enclosure Lighting Kit
- Enclosure Heaters (Motorized Dampers Only)
- Up to 200 mph Wind Load Rating (Contact Factory for Availability)
WARRANTY (Standby Gensets Only)
- 2 Year Extended Limited Warranty
- 5 Year Extended Limited Warranty
- 7 Year Extended Limited Warranty
- 10 Year Extended Limited Warranty
FUEL SYSTEM
- NPT Flexible Fuel Line