SG020 - 20kW
Liquid Cooled Gas Engine Generator Sets
Standby Power Rating 20kW 60Hz
Generac 1.5L Engine
Natuarlly Aspirated
Gaseous Fueled
Features
쐽 Innovative design and fully
prototype tested
쐽 UL2200 Listed
쐽 Solid state frequency
compensated voltage
regulator
쐽 Dynamic and static
battery charger
쐽 Quiet test for low noise
level exercise
쐽 Acoustically designed
engine cooling system
Standard Equipment
쐍 All input connections in one single area
쐍 High coolant temperature shutdown
쐍 Low oil pressure shutdown
쐍 Low coolant level automatic shutdown
쐍 Overspeed automatic shutdown
쐍 Crank timer
쐍 Exercise timer
쐍 Oil drain extension
쐍 Cool flow radiator
쐍 Closed coolant recovery system
쐍 UV/Ozone resistant hoses
쐍 Watertight state of the art electrical connectors
쐍 Mainline circuit breaker
쐍 Radiator drain extension
쐍 Battery charge alternator
쐍 2 Amp static battery charger
쐍 Battery not included
쐍 Battery rack
쐍 Fan and belt guards
쐍 Isochronous governor
fastfax
쐽 High flow low noise
factory engineered
exhaust system
쐽 State of the art digital
control system with R100
digital control panel
쐽 Watertight electrical
connectors
쐽 Rodent proof construction
쐽 High efficiency, low
distortion Generac
designed alternator
쐽 Vibration isolated from
mounting base
쐽 Matching Generac
transfer switches
engineered and tested to
work as a system
쐽 All components easily
accessible for
maintenance
쐽 Electrostatically applied
powder paint
s
Technical Specifications
쐽 Sound attenuated
acoustically designed
enclosure
SG020 Application and Engineering Data
Generator Specifications
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Synchronous
Rotor Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Class F
Stator Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Class F
Total Harmonic Distortion . . . . . . . . . . . . . . . . . . . . . . . .<5%
Telephone Interference Factor(TIF) . . . . . . . . . . . . . . ..<50
Alternator Output Leads 3 Phase . . . . . . . . . . . . . . . .4 wire
Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Sealed Ball
Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Flexible Disc
Load Capacity (Standby Rating) . . . . . . . . . . . . . . . . .20 kW
Excitation System . . . . . . . . . . . . . . . . . . . . . . . . . . . .Direct
NOTE: Generator rating and performance in accordance
with ISO8528-5, BS5514, SAE J1349, ISO3046, and
DIN6271 standards.
Voltage Regulator
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic
Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Single Phase
Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+ 1%
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V/F Adjustable
Adjustable Voltage and Gain
LED Indicators
Generator Features
쐍 Revolving field heavy duty generator
쐍 Directly connected to the engine
쐍 Operating temperature rise 120 C above a 40 C
ambient
쐍 Insulation is Class F rated at 130 C rise
쐍 All models are fully prototyped tested
Control Panel Features
쐍 Seven LED Indicator Lights
쐍 System ready
쐍 Low fuel pressure
쐍 Low battery
쐍 Low oil pressure
쐍 High coolant temp/low coolant temp
쐍 Overspeed
쐍 Overcrank
쐍 Internal Functions:
쐍 3 position switch (auto, off and manual)
쐍 2 wire start for any transfer switch
쐍 Communicates with the Generac RTS transfer switch
쐍 Built-in 7 day exerciser
쐍 Selectable engine speed at exercise
쐍 Governor controller is built into the master control
board
쐍 Temperature range -40 C to 70 C
쐍 Additional Functions
쐍 Utility sensing
쐍 Delay on utility failure for engine start
쐍 Engine warm-up before transfer
쐍 Delay to retransfer to utility
쐍 Engine cooldown timer
쐍 Exerciser not set
Engine Specifications
Make . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Generac
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .In line
Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..4
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5 Liter
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.97
Stroke..........................................................................3.23
Compression Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.4:1
Intake Air System . . . . . . . . . . . . . . . . . Naturally Aspirated
Valve Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replaceable
Lifter Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Hydraulic
Governor Specifications
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic
Frequency Regulation . . . . . . . . . . . . . . . . . . . .Isochronous
Steady State Regulations . . . . . . . . . . . . . . . . . . . . . . + 0.25
Adjustments
Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Yes
Droop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Yes
Engine Lubrication System
Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Gear
Oil Filter . . . . . . . . . . . . . . . . . . .Full flow spin-on cartridge
Crankcase Capacity . . . . . . . . . . . . . . . . . . . . . . . ..4 Quarts
Engine Cooling System
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Closed
Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Belt driven
Fan Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2550
Fan Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 inches
Fan Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pusher
Fuel System
Fuel Type . . . . . . . . . . . . . . . . . .Natural gas, propane vapor
Carburetor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Down Draft
Secondary Fuel Regulator . . . . . . . . . . . . . . . . . . . .Standard
Fuel Shut Off Solenoid . . . . . . . . . . . . . . . . . . . . . .Standard
Operating Fuel Pressure . . . . . . . . . . . . . . . . . .5 - 14 H2O
Electrical System
Battery Charge Alternator . . . . . . . . . . . . . . . . .12V 30 Amp
Static Battery Charger . . . . . . . . . . . . . . . . . . . . . . . . 2 Amp
Recommended Battery . . . . . . . . . . . . . .Group 26, 525CCA
System Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Volts
Rating definitions - Standby: Applicable for supplying emergency power for the duration of the utility power outage. No overload capability is available for this
rating. (All ratings in accordance with BS5514, ISO3046 and DIN6271). (All ratings in accordance with BS5514, ISO3046, ISO8528 and DIN6271).
SG020 Operating Data
kW Rating
20
Engine Size
1.5 Liter 4 cyl. inline
Generator Output Voltage kW - 60Hz
kW
AMP
CB Size
120/240V, 1-phase, 1.0 pf
20
83
100
120/208V, 3-phase, 0.8 pf
20
69
80
Generator Locked Rotor KVA
Available @ Voltage Dip of 35%
Single phase or 208 3-phase
34
Engine Fuel Consumption (Natural Gas) (Propane)
Exercise cycle
Natural Gas
Propane
(ft3/hr.)
(gal/hr.) c
u ft/hr
60
0.65
24
25% of rated load
124
1.35
49
50% of rated load
188
2.05
75
75% of rated load
250
2.73
99
100% of rated load
315
3.44
125
Engine Cooling
Air flow (inlet air including alternator
and combustion air)
ft3/min.
1,528
System coolant capacity
US gal.
2.0
Heat rejection to coolant
BTU/hr.
107,000
Max. operating air temp. on radiator
°C (°F)
60 (150)
Max. ambient temperature
°C (°F)
50 (140)
Combustion Air Requirements
Flow at rated power 60 Hz
cfm
91
Sound Emissions in DBA
Exercising at 7 meters
62
Full load at 7 meters
75
Exhaust
Exhaust flow at rated output 60 Hz
Exhaust temp. at muffler outlet
cfm
177
°F
910
Engine Parameters
Rated synchronous RPM
60 Hz
3,600
HP at rated KW
60 Hz
34.8
Power Adjustment For Ambient Conditions
Temperature Deration
3% for every 10 °C above - °C
25
1.65% for every 10 °F above - °F
77
Altitude Deration
1% for every 100 m above - m
183
3% for every 1000 ft. above - ft.
600
RATING: All three phases units are rated at 0.8 power factor. All single phase units are rated at 1.0 power factor. STANDBY RATING: Standby ratings apply to
installations served by a reliable utility source. The standby rating is applicable to varying loads for the duration of a power outage.
There is no overload capability for this rating. Ratings are in accordance with ISO-3046-1. Design and specifications are subject to change without notice.
KW rating is based on LPG fuel and may derate with natural gas.
SG020 Interconnections
SG020 Installation Layout
Siemens Energy & Automation, Inc.
3333 Old Milton Parkway
Alpharetta, GA 30005
1-800-964-4114
info.sea@siemens.com
www.sea.siemens.com/generators
쏘2006 Siemens Energy & Automation, Inc. All Rights Reserved.
Siemens is a registered trademark of Siemens AG. Product names mentioned may be trademarks or registered
trademarks of their respective companies. Specifications are subject to change without notice.
RPFL-SG020-0506 New 5M0506PP Printed in USA