Generac Power Systems SG400 User manual

Standby Power Rating
400 kW 500 kVA 60 Hz
Prime Power Rating*
360 kW 450 kVA 60 Hz
21.9L
Industrial Spark-Ignited Generator Set
EPA Certified Stationary Emergency
Image used for illustration purposes only
*EPA Certified Prime ratings are not available in the U.S. or its Territories
NFPA70, 99, 110, 37
ISO9001, 8528, 3046, 7637, Pluses #2b, 4
NEMA ICS10, MG1, 250, ICS6, AB1
NEC700, 701, 702, 708
UL2200, UL508, UL142, UL498
ANSI C62.41
IBC 2009, CBC 2010, IBC 2012, ASCE 7-05,
ASCE 7-10, ICC-ES AC-156 (2012)
SG400
SG400 400 kW
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.
Powering Ahead
Codes and Standards
Generac products are designed to the following standards:

CONTROL SYSTEM
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
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 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
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
Date/Time Fault History (Event Log)
Isochronous Governor Control
Waterproof/sealed Connectors
Audible Alarms and Shutdowns
Not in Auto (Flashing Light)
Auto/Off/Manual Switch
E-Stop (Red Mushroom-Type)
NFPA110 Level I and II (Programmable)
Customizable Alarms, Warnings, and Events
Modbus protocol
Predictive Maintenance algorithm
Sealed Boards
Password parameter adjustment protection
Single point ground
15 channel data logging
0.2 msec high speed data logging
Alarm information automatically comes up
on the display
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
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)
SG400
SG400 400 kW

Engineered Options
CONTROL SYSTEM
Rating Definitions
Configurable Options
ENGINE SYSTEM
Coolant heater ball valves
Fluid containment pans
ALTERNATOR SYSTEM
3rd Breaker Systems
GENERATOR SET
Special Testing
Battery Box
ENCLOSURE

Motorized Dampers
Enclosure Ambient Heaters
Door Alarm Switch
CONTROL SYSTEM
Spare inputs (x4) / outputs (x4) - H Panel
Only
Battery Disconnect Switch
ENGINE SYSTEM
General
Engine Block Heater with ball valves
Flexible Fuel Line - NPT Connection
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 (480/600 V non-upsized
only)
GENERATOR SET
Gen-Link Communications Software (English
Only)
Extended Factory Testing (3 Phase Only)
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
180 MPH Wind Kit
12 VDC Enclosure Lighting Kit
120 VAC Enclosure Lighting Kit
AC/DC Enclosure Lighting Kit
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 func-
tions
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).
SG400
SG400 400 kW

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 5
Regulation Accuracy (Steady State) +/- 0.25%
General
Make Generac
Cylinder # 12
Type V12
Displacement - L (Cu In) 21.9 (1336.42)
Bore - mm (in) 128 (5.03)
Stroke - mm (in) 142 (5.6)
Compression Ratio 10:1
Intake Air Method Turbocharged/Aftercooled
Number of Main Bearings 7
Connecting Rods Alloy Steel
Cylinder Head Cast Iron - OHV
Cylinder Liners Cast Alloy Steel
Ignition Altronic CD200D
Pistons Aluminum Alloy
Crankshaft Forged Alloy Steel
Lifter Type Solid
Intake Valve Material High Temp Alloy Steel
Exhaust Valve Material High Temp Alloy Steel
Hardened Valve Seats High Temp Alloy Steel
Engine Governing
Governor Electronic
Frequency Regulation (Steady State) (+/-) 0.25%
Lubrication System
Oil Pump Type Gear
Oil Filter Type Twin Full flow with intercooler
Crankcase Capacity - L (qts) 30 (31.7)
Cooling System
Cooling System Type Pressurized Closed Recovery
Water Pump Flow - gpm (lpm) 211 (800)
Fan Type Pusher
Fan Speed (rpm) 1404
Fan Diameter mm (in) 44
Coolant Heater Wattage 2500
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 Std
Battery Size See Battery Index 0161970SBY
Battery Voltage (2) 12 VDC
Ground Polarity Negative
ENGINE SPECIFICATIONS
ALTERNATOR SPECIFICATIONS
SG400 application and engineering data
SG400 400 kW

FUEL CONSUMPTION RATES*
STARTING CAPABILITIES (sKVA)
POWER RATINGS
*Fuel supply installation must accommodate fuel consumption rates at 100% load.
COOLING
COMBUSTION AIR REQUIREMENTS
Natural Gas – ft3/hr (m3/hr)
Percent Load Standby
25% 1856 (52.6)
50% 2845 (80.5)
75% 3833 (108.5)
100% 4823 (136.6)
Standby
Cooling Fan Air Flow (Open Set) ft3/min (m3/min) 25,100 (711)
Coolant Flow per Minute gpm (lpm) 211 (800)
Coolant System Capacity gal (L) 23 (87)
Heat Rejection to Coolant BTU/hr 1,102,122
Max. Operating Air Temp on Radiator ºF (ºC) 122 (50.0)
Maximum Additional Radiator Backpressure in H2O 0.5
Standby
Flow at Rated Power cfm (m3/min) 750 ( 21)
Standby
Rated Engine Speed rpm 1800
Engine Horsepower** hp 620
Piston Speed ft/min (m/min) -
BMEP psi 123
** Refer to “Emissions Data Sheet” for maximum bHP for EPA and SCAQMD permitting
purposes.
Standby
Exhaust Flow (Rated Output) cfm (m3/min) 2720 ( 77)
Maximum Recommended Back Pressure (Post Turbo) inHg 1.5
Exhaust Temp (Rated Output - post silencer) ºF (ºC) 1350 (732)
Exhaust Outlet Size (Open Set) in 3.5" O.D. Flex (No Muffler)
ENGINE EXHAUST
Natural Gas
Three-Phase 120/208 VAC @0.8pf 400 kW Amps: 1389
Three-Phase 120/240 VAC @0.8pf 400 kW Amps: 1204
Three-Phase 277/480 VAC @0.8pf 400 kW Amps: 602
Three-Phase 346/600 VAC @0.8pf 400 kW Amps: 481
sKVA vs. Voltage Dip
480 VAC 208/240 VAC
Alternator kW 10% 15% 20% 25% 30% 35% 10% 15% 20% 25% 30% 35%
Standard 400 387 581 775 968 1162 1356 345 570 835 1100 1450 1710
Upsize 1 555 457 686 914 1143 1371 1600 - - - - - -
Upsize 2 642 471 707 943 1179 1414 1650 543 814 1086 1357 1629 1900
SG400 operating data
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.
SG400 400 kW

*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.
OPEN SET (Includes Exhaust Flex)
L x W x H in (mm) 154.4 (3923) x 71 (1803) x 67 (1702)
Weight lbs (kg) 8429 (3823)
Sound Level (dBA*) 93
STANDARD ENCLOSURE
L x W x H in (mm) 207.4 (5268) x 71 (1803) x 80 (2032)
Weight lbs (kg) Steel: 10428 (4730)
Aluminum: 9298 (4217)
Sound Level (dBA*) 92
LEVEL 1 ACOUSTIC ENCLOSURE
L x W x H in (mm) 247.5 (6285) x 71 (1803) x 80 (2032)
Weight lbs (kg) Steel: 11211 (5085)
Aluminum: 9720 (4409)
Sound Level (dBA*) 84
LEVEL 2 ACOUSTIC ENCLOSURE
L x W x H in (mm) 207.4 (5268) x 71 (1803) x 114 (2899)
Weight lbs (kg) Steel: 11759 (5333)
Aluminum: 9951 (4513)
Sound Level (dBA*) 75
Generac Power Systems, Inc. • S45 W29290 HWY. 59, Waukesha, WI 53189 • generac.com
©2013 Generac Power Systems, Inc. All rights reserved. All specifications are subject to change without notice. Part No. 0K6098-A / Printed in U.S.A. 11/14/13
Specification characteristics may change without notice. Please consult a Generac Power Systems Industrial Dealer for detailed installation drawings.
SG400 dimensions, weights, and sound levels
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SG400 400 kW