Generac Power Systems QT025A User Manual
QT025A
Standby Power Rating
31kVA 25kW 60Hz
Industrial Gaseous Generator Set
EPA Certified Stationary Emergency
Generator image used for illustration purposes only
QT025A 25kW
1 of 5
features benefits
Generator Set
= PROTOTYPE & TORSIONALLY TESTED 4 PROVIDES A PROVEN UNIT
= UL2200 TESTED 4 ENSURES A QUALITY PRODUCT
= RHINOCOAT PAINT SYSTEM 4 IMPROVES RESISTANCE TO ELEMENTS
Engine
= EPA COMPLIANT 4 ENVIRONMENTALLY FRIENDLY
= INDUSTRIAL TESTED, GENERAC APPROVED 4 ENSURES INDUSTRIAL STANDARDS
= POWER-MATCHED OUTPUT 4 ENGINEERED FOR PERFORMANCE
= INDUSTRIAL GRADE 4 IMPROVES LONGEVITY AND RELIABILITY
Alternator
= TWO-THIRDS PITCH 4 ELIMINATES HARMFUL 3RD HARMONIC
= LAYER WOUND ROTOR & STATOR 4 IMPROVES COOLING
= CLASS H MATERIALS 4 HEAT TOLERANT DESIGN
= DIGITAL 3-PHASE VOLTAGE CONTROL 4 FAST AND ACCURATE RESPONSE
Controls
= ENCAPSULATED BOARD W/ SEALED HARNESS 4 EASY, AFFORDABLE REPLACEMENT
= 4-20mA VOLTAGE-TO-CURRENT SENSORS 4 NOISE RESISTANT 24/7 MONITORING
= SURFACE-MOUNT TECHNOLOGY 4 PROVIDES VIBRATION RESISTANCE
= ADVANCED DIAGNOSTICS & COMMUNICATIONS 4 HARDENED RELIABILITY
primary codes and standards
QT025A application and engineering data
ENGINE SPECIFICATIONS
QT025A 25kW
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General Cooling System
Make Generac Cooling System Type Pressurized Closed
EPA Emissions Compliance Stationary Emergency Water Pump Flow 11 gal/min
EPA Emissions Engine Reference See Emissions Data Sheet Fan Type Pusher
Cylinder # 4 Fan Speed (rpm) 2150
Type In-line Fan Diameter mm (in.) 457 (18)
Displacement - L 2.4 Coolant Heater Wattage 1500
Bore - mm (in.) 86.61 (3.41) Coolant Heater Standard Voltage 120VAC
Stroke - mm (in.) 100.08 (3.94)
Compression Ratio 9.5:1
Intake Air Method Naturally Aspirated
Number of Main Bearings 5 Fuel System
Connecting Rods Forged Fuel Type Natural Gas, Propane Vapor
Cylinder Head Aluminum Carburetor Down Draft
Cylinder Liners No Secondary Fuel Regulator Standard
Ignition High Energy Fuel Shut Off Solenoid Standard
Pistons Aluminum Alloy Operating Fuel Pressure 5" - 14" H2O*
Crankshaft Cast
Lifter Type Overhead Cam *Fuel pressure must remain within specified range and not drop more than 1
Intake Valve Material Steel Alloy
Exhaust Valve Material Hardened Steel
Hardened Valve Seats Yes Engine Electrical System
Lubrication System Battery Charging Alternator (Amps) 30
Oil Pump Type Gear Battery Size (at 0ºC) 525CCA
Oil Filter Type Full-flow spin-on cartridge Battery Group 26
Crankcase Capacity - L (qts) 3.8 (4) Battery Voltage 12VDC
ALTERNATOR SPECIFICATIONS
in. w.c. from static (no-load) to full load.
System Voltage 12VDC
Ground Polarity Negative
Standard Model 390mm Voltage Regulator Type Full Digital
Poles 4 Number of Sensed Phases 3
Field Type Revolving Regulation Accuracy (Steady State) +/- 0.25%
Insulation Class - Rotor H
Insulation Class - Stator H
Total Harmonic Distortion <5% Engine Governing
Telephone Interference Factor (TIF) <50 Governor Electronic
Standard Excitation Brush Type Frequency Regulation (Steady State) +/- 0.25%
Bearings Sealed Ball
Coupling Flexibile Disc
Load Capacity - Standby 100%
Prototype Short Circuit Test Yes
CODES AND STANDARDS COMPLIANCE (WHERE APPLICABLE)
NFPA 99 BS5514
NFPA 110 SAE J1349
ISO 8528-5 DIN6271
ISO 1708A.5 IEEE C62.41 TESTING
ISO 3046 NEMA ICS 1
UL2200
Rating Definitions:
Standby – Applicable for a varying emergency load for the duration of a utility power outage with no overload capability. (Max. load factor = 70%)
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