Standby Generator Sets

Specifications

SPECIFICATIONS

‹ GENERATOR

Type

Synchronous

Rotor Insulation

Class F

Stator Insulation

Class F

Total Harmonic Distortion

< 5%

Alternator Output Leads 3-phase

4-wire

Bearings

Sealed Ball

Coupling

Flexible Disc

Load Capacity (Standby Rating)

20/25/30 kW*

*NOTE: Generator rating and performance in accordance with ISO8528-5, BS5514, SAE J1349, ISO3046 and DIN 6271 Standards. KW rating is based on LPG fuel and may derate with natural gas.

Excitation System

 

Direct

Generator Output Voltage/kW - 60 Hz

 

 

 

kW

Amp

CB Size

120/240V, 1-phase, 1.0 pf

20/25/30

83/104/125

100/125/150

120/208V, 3-phase, 0.8 pf

20/25/30

69/87/104

80/100/125

277/480V, 3-phase, 0.8 pf

20/25/30

30/38/45

35/45/50

Generator Locked Rotor KVA Available @ Voltage Dip of 35%

Single-phase or 208 3-phase: 20kW 25kW 30kW 34 KVA 38 KVA 56 KVA

‹ ENGINE

Make

 

 

Generac

Model

 

 

In Line

Cylinders and Arrangement

 

4

Displacement

 

 

1.6 Liter

Bore

 

 

3.15 in.

Stroke

 

 

3.13 in.

Compression Ratio

 

9.75-to-1

Air Intake System

...............................................

Naturally Aspirated

Valve Seats

 

Replaceable

Lifter Type

 

 

Hydraulic

Engine Parameters

 

 

 

Rated Synchronous RPM

60 Hz, 3600

HP at rated:

20kW

25kW

30kW

 

 

35 HP

45 HP

48 HP

 

Exhaust System

 

 

 

Exhaust Flow at Rated Output 60 Hz: 20kW

25kW

30kW

 

 

209 cfm

235 cfm

240 cfm

Exhaust Temp. at Rated Output:

910°F

1015°F

1022°F

Combustion Air Requirements (Natural Gas)

Flow at rated power, 60 Hz:

20kW

25kW

30kW

 

 

80 cfm

90 cfm

92 cfm

Governor

 

 

 

 

Type

 

Electronic

Frequency Regulation

Isochronous

Steady State Regulation

 

± .25%

Adjustments:

 

 

 

 

Speed

 

Selectable

Engine Lubrication System

 

Type of Oil Pump

Gear

Oil Filter

Full Flow, Cartridge

Crankcase Oil Capacity

4 U.S. qts.

‹ COOLING SYSTEM

Type

Closed

Water Pump

Belt Driven

Fan Speed

2450

Fan Diameter

17.7 inches

Fan Mode

Pusher

Air Flow (inlet air...........................................................including alternator and

2490 ft3/min.

combustion air)

Coolant Capacity

2.0 U.S. gal.

Heat Rejection to Coolant

117,000 Btu/h

Maximum Operating Air Temp. on Radiator

60° C (150° F)

Maximum Ambient Temperature

50° C (140° F)

‹FUEL SYSTEM

Type of Fuel

Natural Gas, Propane Vapor

Carburetor

......................................................................

 

Down Draft

Secondary Fuel Regulator

 

Standard

Fuel Shut-off Solenoid

 

 

Standard

Operating Fuel Pressure

......................

5 in. - 14 in. Water Column

Fuel Consumption - ft3/hr (Natural Gas/LPV)

 

Exercise

25%

50%

75%

100%

 

Cycle

Load

Load

Load

Load

20kW

56/24

124/49

188/75

250/99

315/125

25kW

56/24

161/64

253/101

345/138

430/175

30kW

56/24

209/82

281/117

360/147

437/185

‹ELECTRICAL SYSTEM

Battery Charge Alternator

12V, 15 Amp

Static Battery Charger

 

2 Amp

Recommended Battery

Group 26, 525CCA

System Voltage

 

12 Volts

Voltage Regulator

 

 

 

Type

 

Electronic

Sensing

Single-phase

Regulation

 

± 1%

Features

V/F Adjustable, Adjustable

 

Voltage and Gain LED Indicators

Power Adjustment for Ambient Conditions

Temperature Deration:

 

 

 

3% for every 10° C above °C

20kW

25kW

30kW

 

40

40

25

1.65% for every 10° above °F

104

104

77

Altitude Deration:

 

 

 

1% for every 100 m above m

20kW

25kW

30kW

 

1220

915

182

3% for every 1000 ft. above ft.

4000

3000

600

Controller

 

R-200

6-1

04/07 A .Rev GenSpec037

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Generac Power Systems 30, 20, 25 owner manual Specifications

25, 30, 20 specifications

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