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Home Standby - 25 SAE Home Standby - 25 SAE
Continuous Standby Power Rating
Models:
25kW 60 Hz
20kW 60 Hz
SAE = Sound Attentuated Enclosure
04725 (25kW NG or LPG
with 200 Amp ATS
)
04726 (25kW NG or LPG -
No ATS
)
UL 2200 Listed
2 Year Limited Warranty
GENERAC 4G15 ENGINE
INNOVATIVE DESIGN & PROTOTYPE TESTING are key components of
GENERACS success in IMPROVING POWER BY DESIGN. But it
doesnt stop there. Total commitment to component testing, reliability
testing, environmental testing, destruction and life testing, plus testing
to applicable CSA, UL NEMA, EGSA, and other standards, allows you
to choose GENERAC POWER SYSTEMS with the confidence that
these systems will provide superior performance.
TEST CRITERIA:
PROTOTYPE TESTED
SYSTEM TORSIONAL TESTED
ELECTRO-MAGNETIC INTERFERENCE
NEMA MG1-22 EVALUATION
MOTOR STARTING ABILITY
SOLID-STATE, FREQUENCY COMPENSATED VOLTAGE REGULATION.
This state-of-the-art power maximizing regulation system is standard on
all Generac models. It provides optimized FAST RESPONSE to changing
load conditions and MAXIMUM MOTOR STARTING CAPABILITY by
electronically torque-matching the surge loads to the engine.
SINGLE SOURCE SERVICE RESPONSE from Generacs dealer network
provides parts and service know-how for the entire unit, from the engine
to the smallest electronic component. You are never on your own when
you own a GENERAC POWER SYSTEM.
GENERAC TRANSFER SWITCHES. Long life and reliability are
synonymous with GENERAC POWER SYSTEMS. One reason for this
confidence is that the GENERAC product line includes its own transfer
systems and controls for total system compatibility.
Power Matched
Naturally Aspirated
FEATURES
Liquid Cooled Gas Engine Generator Sets
Generac
200 Amp Automatic
Transfer Switch (UL Listed)
Included with model 04725.
Available for model
04726.
® GENERATOR SPECIFICATIONS
TYPE ...................................................................... Two-pole, revolving field
ROTOR INSULATION ....................................................................... Class F
STATOR INSULATION ...................................................................... Class F
VOLTAGE WAVE FORM DEVIATION .................................................... <5%
TOTAL HARMONIC DISTORTION (line to line) .................................... <5%
TELEPHONE INTERFERENCE FACTOR (TIF) ..................................... <50
ALTERNATOR ................................................. Self-ventilated and drip-proof
BEARINGS (PRE-LUBED & SEALED) ....................................................... 1
COUPLING .................................................................... Direct, Flexible Disc
LOAD CAPACITY (STANDBY) ............................................................. 100%
LOAD CAPACITY (PRIME) .................................................................. 110%
NOTE:
Emergency loading in compliance with NFPA 99, NFPA 110,
paragraph 5-13.2.6. Generator rating and performance in accordance
with ISO8528-5, BS5514, SAE J1349, ISO3046, and DIN6271 standards.
EXCITATION SYSTEM
DIRECT .................................................................. DC excitation system
Low-velocity brushes and slip rings
REGULATION ......................................................................... Solid-state
±1% regulation
GENERATOR FEATURES
Two pole, revolving field generator, directly connected to the engine shaft
through a heavy-duty, flexible disc for permanent alignment.
Generator meets temperature rise standards for class F insulation as
defined by NEMA MG1-22.
Stator windings are trickle varnished and rotor windings are roll-dipped
for complete impregnation.
Unit tested for motorstarting ability by measuring instantaneous voltage
dip with a waveform data acquisition system.
All models utilize an advanced wire harness design for reliable interconnection
within the circuitry.
Magnetic circuit, including amortisseur windings, tooth and skewed stator
design, provides a minimal level of waveform distortion and an electromagnetic
interference level which meets accepted requirements for standard AM radio,
TV, and marine radio telephone applications.
Voltage waveform deviation, total harmonic content of the AC waveform,
and balanced T.I.F. (Telephone Influence Factor) have been evaluated to
acceptable standards in accordance with NEMA MG1-22.
Alternator is of drip-proof guarded construction.
Fully life-tested protective systems, including field circuit and thermal
overload protection and standard mainline circuit breakers capable of
handling full output capacity.
System torsional acceptability confirmed during prototype testing.
ENGINE SPECIFICATIONS
MAKE .......................................................................................... GENERAC
MODEL ....................................................................................... MMC 4G15
CYLINDERS ..................................................................................... 4 in-line
DISPLACEMENT ........................................................ 1.5 Liter (91.5 cu. in.)
BORE ............................................................................... 75.5 mm (2.97 in.)
STROKE ............................................................................. 82 mm (3.23 in.)
COMPRESSION RATIO ........................................................................ 9:4:1
INTAKE AIR ................................................................... Naturally Aspirated
NUMBER OF MAIN BEARINGS ................................................................ 5
CONNECTING RODS .................................................... 4-Drop forged steel
CYLINDER HEAD ........................................................................... S.O.H.C.
PISTONS .......................................................................... 4-Aluminum Alloy
CRANKSHAFT ................................................................ Drop Forged Steel
VALVE TRAIN
LIFTER TYPE .................................................................... Rocker Arm Type
INTAKE VALVE MATERIAL ......................... High Temperature Alloy Forged
EXHAUST VALVE MATERIAL ..................... High Temperature Alloy Forged
VALVE SEATS ........................................................................... Replaceable
ENGINE GOVERNOR
ELECTRONIC.............................................................................. Standard
FREQUENCY REGULATION, NO-LOAD TO FULL LOAD ............ 0.5%
STEADY STATE REGULATION .................................................. ±0.25%
LUBRICATION SYSTEM
TYPE OF OIL PUMP ............................................................................ Gear
OIL FILTER ...................................................................... Full flow, cartridge
CRANKCASE CAPACITY .................................................. 3.8 Liters (4 qts.)
COOLING SYSTEM
TYPE OF SYSTEM ........................................ Pressurized, closed recovery
WATER PUMP .......................................................... Pre-lubed, self-sealing
TYPE OF FAN ................................................................................... Pusher
NUMBER OF FAN BLADES ....................................................................... 6
DIAMETER OF FAN ......................................................... 380 mm (15.0 in.)
COOLANT HEATER ................................................................. 120V, 500 W
FUEL SYSTEM
FUEL
Natural Gas or L.P. Vapor .......................................................... Standard
CARBURETOR ............................................................................ Down draft
SECONDARY FUEL REGULATOR. Nat. Gas or L.P. Vapor Systems
AUTOMATIC FUEL LOCKOFF SOLENOID ................................... Standard
OPERATING FUEL PRESSURE VAPOR SYSTEMS ..Nat. Gas 5 to 14 H
2
O
LP Vapor.....11 to 14 H
2
O
ELECTRICAL SYSTEM
BATTERY CHARGE ALTERNATOR ................................... 15 Amps at 12 V
STARTER MOTOR .................................................................................. 12 V
RECOMMENDED BATTERY ............... 12 V, 525 CCA @ 0
o
F/75 A.H., 26R
GROUND POLARITY ..................................................................... Negative
APPLICATION & ENGINEERING DATA
Home Standby - 25 SAE
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). * Maximum wattage and current are subject to and limited by such factors as fuel Btu content, ambient temperature, altitude, engine power and condition, etc. Home Standby - 25 SAE
STANDBY
Home Standby - 25 SAE
GENERATOR OUTPUT VOLTAGE/KW - 60Hz
N.G./L.P.
Rated AMP
120/240V, 1-phase, 1.0 pf
25
104.2
MOTORSTARTING
Maximum at 35% instantaneous voltage dip
with standard alternator; 60 Hz
48 K