Hydraulic Generator TEFC Systems

Totally Enclosed Fan Cooled Generator
Standard Generator Airflow


Ratings Available: 10.0 kW thru 40 kW


What is a hydraulic generator?

A hydraulic generator uses a hydraulic motor to replace the large, heavy, gas, or diesel motor found on traditional generators.  When compared side by side, the advantages of a hydraulic generator become obvious.  On average a hydraulic generator is 50% lighter and smaller than a gas or diesel generator.  It’s quieter, more reliable, virtually maintenance-free and there’s no pollution or carbon exhaust.

Utilizing the existing onboard power train, rotary power is transferred to the hydraulic pump, where it’s converted to fluid power to the hydraulic generator.  Because it’s not limited by big diesel or gas engines, drive shafts or drive belts, you can put the hydraulic generator anywhere. The options are virtually endless!

What is a TEFC (Totally Enclosed Fan-Cooled) hydraulic generator?

A TEFC generator has a closed-off chamber that requires the use of an external fan to blow air over it. A benefit to having the generator totally enclosed is that it’s protected from the outside environment, including dust, airborne contaminants, and many weather disturbances such as wind-driven rain. A TEFC generator is the recommended choice when your load is in an outdoor or wet location. The generator is IP67 rated.

What is ATEX (Atmospheres Explosible) Zone 1

Zone 1 (gases/vapors): an area in which an explosive mixture is likely to occur in normal operation.

What is ATEX (Atmospheres Explosible) Zone 2

Zone 2 (gases/vapors): an area in which an explosive mixture is not likely to occur in normal operation and if it occurs it will exist only for a short time.

TEFC | ATEX Zone 1 | ATEX Zone 2 

    • Brushless
    • Self-excited
    • Integrated generator controller with standard CAN SAE1939
    • Two-bearing generators available
    • 4-pole 1800 rpm and 2-pole 3600 rpm available
    • Universal flange connection options
    • All standard voltages and frequencies available in single and three-phase
    • IP67 rated
    • Maintenance-free up to 20000 hours

High-quality electricity from hydraulics

A hydraulic generator transforms the hydraulic power of a working machine into high-quality electricity with great efficiency. The electricity is suitable for all-electric equipment from small devices to heavy work tools.

Power wherever, whenever

When a working machine is equipped with a hydraulic generator, electric power for any purpose is always guaranteed, no matter where you are. Because of its compact size, the generator can be installed on many kinds of machines, of any size. Unlike old-fashioned generator units, the hydraulic generator produces electricity anytime during everyday work. This makes the cost per kVA very reasonable.

Reliable, durable, and safe

Reliable start and independence of extra fuel are assets of a hydraulic generator. Other benefits include long-running life and great durability. Most of all, the quality of electricity stays constant, thanks to the automatic speed control valve and vibration-free running, which also bring extra safe to use.

A hydraulic generator, running with the power of a working machine’s hydraulics, guarantees high-quality electricity always available. The generator can be safely assembled in any hydraulic system. Compared to a combustion engine-driven generator unit of the same output level, a hydraulic generator is half the weight and size. Still, it easily powers up even a large electric motor without any problem.


    Features & Benefits
    • 75% smaller size
    • 50% less weight
    • IP54 rated
    • Less noise and vibration
    • Less maintenance cost
    • Longer life cycle
    • Greater reliability
    • Power on the fly or parked
    • Will start in cold weather
    • Minimal space required
    • No air pollution or exhaust
    • No engine to service
    • No fuel tanks
    • No carbon foot print
    • Backed by the most comprehensive warranty and service in the industry
    Alternator Detail
    • Design: Brushless, revolving field, two-pole, 3600 rpm/3000 rpm or 4-pole 1800 rpm/1500 rpm for 60Hz/50Hz operation
    • Phase: Single and 3-phase available
    • Voltage: All standard voltages available
    • Rating: See nameplate for individual rating
    • Regulation: (+/-)5% voltage regulation from nameplate rating
    • Waveform: Harmonic distortion limited to 7%
    Hydraulic System
    • Type of oil: Use a premium grade hydraulic oil, such as Mobile DTE series oil or an equivalent
    • Viscosity: Optimum operating viscosity is ISO 46 for best performance in all conditions
    • Capacity: The reservoir capacity will vary with each generator. Please see the "Reservoir Capacity" in the generator specifications.
    Generator Ratings

    Ratings Chart

    Harrison Hydragen