Woodward ProAct™ I and II Digital Electric Powered Governor Systems Specifications

Specifications

Actuator

Output Shaft: 0.500-36 inch serration on output shaft. Opposite side used for feedback device. (Other configurations

available upon request.)

Operating Temperature Range: –40 to +100 °C (–40 to +212 °F) operating environment. Contact Woodward for

extreme temperature installation procedures.

Feedback: Brushless Hall effect feedback device directly connected to actuator shaft.

Installation: May be mounted on 2.250 inch (57.15 mm) diameter male pilot concentric to the terminal shaft using

four bolts through the actuator or with four 0.312-18 inch bolts into the base (M8-6H metric optional). The actuator

may be mounted in any attitude.

May be connected directly to butterfly shaft, or may be linked to rack or valve.

Weight: The ProAct I and ProAct II actuators each weigh 6.9 kg (15.25 lbs).

Construction: All external surfaces are resistant to water and salt water corrosion. Actuator is waterproof at normal

water hose pressure. Do not high-pressure wash.

Vibration and Shock Tested: Tested to US MIL-STD-810C.

MIN Fuel Return Spring: The actuator is equipped with a light spring return toward min fuel to prevent drift in case

of position signal interruption. Normal operating conditions do not require spring return, as the actuator is powered in

both the increase and decrease directions.

Direction of Rotation: All models are capable of either clockwise or counterclockwise rotation to increase fuel.

Control

Speed: Dynamics maps are field selectable for either low speed (8–300 rpm) or high speed (300–2100 rpm).

Dynamics: Two menus for engine dynamics are switch-selectable for alternate fuel, alternate loads, etc. Four

different gain settings in each dynamics menu tailor governor response to various conditions depending on load or

non-linearity in the fuel control system.

Limiters: Limiters set minimum, idle, and maximum fuel settings, and minimum and maximum torque schedules.

Two-slope torque limit schedule with program-selected breakpoint is available.

Speed Switches: Three speed switches are included with programmable on and off positions according to engine

speed. The switches may be used to indicate cranking, idle, rated, or overspeed operation. Switch output is 500 mA

when closed. Increase-speed trip points may vary from decrease-speed trip points.

Droop: Two droop schedules are available, with a programmable switch point between idle droop and rated droop.

Speed Reference: Programmable minimum and maximum limiters with 4–20 mA remote reference to raise and

lower the rated speed. Rate of change of speed reference may be programmed with different rates for raise and

lower.

Accel and Decel Ramps: Acceleration and deceleration times may be programmed to protect engines from damage

or to protect processes from sudden changes.

Supply Voltage Range:

8–32 Vdc for ProAct I

18–32 Vdc for ProAct II

Technical Manual: 04121