Category: Woodward

Applications

The ProAct™ Analog product line is a family of electric actuators intended to be mounted on-engine

to control varying functions including (but not limited to): fuel rack positioning, timing control,

throttle valve, and wastegate positioning. The actuator is effectively a positioner with an

integral driver, which will accept a position command signal from

another device in the system such as a speed control.

In addition, the ProAct Digital Plus actuators include an integral digital

driver capable of controlling the actuator, communicating with the outside control

system, and containing on-board software and intelligence to realize monitoring and

customizing functions.

Actuators with an MS-style connector mounted as an option on the end cover are also available. For

OEMs, other factory-installed connectors may also be considered.

Control

Operating Temperature Range: –40 to +70 °C (–40 to +158 °F) operating environment.

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. Up to 3 start fuel limiter

levels are 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:

10–32 Vdc for ProAct I

18–32 Vdc for ProAct II

Technical Manual: 35131

Regulatory Compliance

Listings are limited only to those units bearing the appropriate marking or agency identification.

Control

European Compliance for CE Marking:

EMC Directive: 2014/30/EU

Restriction of Hazardous Substances Directive: 2011/65/EU

Actuator

Other European Compliance:

Compliance with the following European directives or standards does not qualify this product for

application of the CE Marking.

Restriction of Hazardous Substances Directive: 2011/65/EU

Machinery Directive: Compliant as partly completed machinery per 2006/42/EC

Description

The ProAct control system is a combination of a 32-bit microprocessor control and a

limited-angle rotational torque motor (actuator). The system features user-friendly

menus to provide extreme flexibility in the development of special control schemes

for different types of engines.

Two different ProAct actuators are available. The ProAct I actuator provides 1.4 Nm

(1.0 lb-ft) of torque in steady state and 3.55 J (2.62 ft-lbs) of work over 75° of travel.

The ProAct II provides 2.7 Nm (2.0 lb-ft) of torque in steady state and 7.11 J (5.24

ft-lbs) of work over the 75° of rotation

The control has two complete sets of dynamic adjustments to aid when operating

with such conditions as two different fuels, or in parallel/stand-alone electrical

generation. A four-slope gain schedule is available in each set of dynamics. This

permits programming for extremely responsive yet extremely stable operation of

carbureted engines. Adjustment of the ProAct control is done through the use of a

PC service tool, communicating to the ProAct via CAN. The software-based service

tool allows access to all of the tunable settings. The service tool PC CAN adapter is

a separate device and will normally be unplugged and removed during governor

system operation. This provides security against unauthorized tampering with

system adjustments. The control may be tuned or monitored during setup with the

PC service tool, if desired.

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 and meets IP54 rating. 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.

The ProAct™ digital control system is an electric powered governor system designed to

provide precise electronic control and limiting for gas and diesel engines.

ProAct I is designed for direct coupling to the butterfly valve shaft on small gas engines or for

diesel engines which require less than 1.4 Nm (1.0 lb-ft) of torque to move the rack.

ProAct II is designed for control of most diesel engines and larger carbureted gas engines.

Standard Features

The ProAct digital electronics include settings for either droop or isochronous

operation. Start, idle, and rated speeds may be set. Separate droop schedules are

available for rated and idle. Variable speeds may be controlled by external input.

The rates that the speed setting can be raised or lowered may also be adjusted.

Fuel limits may be imposed for No Load, Full Load, Start-up (start-fuel limit), and

Idle speed. A two-slope torque limit is available. Separate ramp times may be

established for acceleration and deceleration. Speeds for rated, idle, raise limit,

and lower limit are also easily preset

Applications

The ProAct™ digital control system is an electric powered governor system designed to

provide precise electronic control and limiting for gas and diesel engines.

ProAct I is designed for direct coupling to the butterfly valve shaft on small gas engines or for

diesel engines which require less than 1.4 Nm (1.0 lb-ft) of torque to move the rack.

ProAct II is designed for control of most diesel engines and larger carbureted gas engines.

• 75° rotary output allows direct coupling to butterfly, eliminating linkage

• All-electric actuator requires no drive or hydraulic supply

• Programmable digital electronics permit tailoring control to various applications

• Actuators are extremely fast, electronically positioned in both directions

• Alternate dynamics for dualfuel applications or co-gen/standby

• 3 speed-activated switches

• Start fuel limit and maximum fuel limit for derating

• Manifold pressure fuel limiting

• Two-slope torque limiting

Key Product Variants Include

• Simple Governor (SG) 5.7 – 40 foot-pounds of work.

• Universal Governor (UG-25+) 10.8 – 21.7 foot-pounds of work.

• Governor (3161) 18 foot-pounds of work.

• Electronically Controlled Actuator w/ Mechanical Backup (EGB) 1-300 foot-pounds of work.

• Large Pressure-Compensated (PG) 12-58 foot-pounds of work.

Key Features

• Simple to operate and exceptionally reliable.

• Precise control of engine speed and output.

• For virtually all types of engine applications: power generation, marine, pump, compression and vehicle applications.

• Proven, industry-standard design.

• Worldwide acceptance and easy service.

Woodward hydraulic-mechanical and electronic governors provide reliable

and precise control of engine speed and output in every type of engine application.

Features & Functionality

Hydraulic-mechanical and electronic governors from Woodward ensure exceptionally

reliable and precise control of engine speed and output in virtually every type of engine application.

Woodward governors are used in power generation, marine, pump, compression and vehicle applications, among others.

They are available in work output ratings ranging from 10.8 inch-pounds up to 500 foot-pounds.

Our SG and PSG governors are simple to operate and offer exceptional reliability.

Driven by a suitable SG/PSG/EG drive on the engine,

these governors operate using the engine’s own oil supply at minimum pressures of 25 psi.

Woodward’s universal governors (UG) are mechanical-hydraulic governors for controlling diesel,

gas or dual-fuel engines, or steam turbines.

This proven design has been an industry standard for many years and worldwide

acceptance ensures easy servicing in most engine and governor shops.

The mechanical governor backup capability of Woodward’s EGB governor/actuators

provides increased reliability and safety during the operation of dual-fuel and diesel engines or gas and steam turbines.

Woodward’s PG pressure-compensated governor line effectively controls the

speed of the largest engines and turbines with work capacities ranging from 12 to 500 ft-lb.

HARDWARE SPECIFICATIONS

Size:

Operator Interface Panel:

Power Supply Voltage:

Control Part Numbers:

Connectors:

Voltage Measuring Input Range:

Current Measuring Inputs:

Temperature Range:

Humidity:

Enclosure Rating:

Vibration:

Mechanical Shock:

Regulatory Compliance (pending):

281.8mm (11.1”) High x 358.1mm (14.1”) Wide x 134.0mm (5.275”) Deep

8 (20 Character) lines plus membrane keypad

24 Vdc system (18–32 Vdc nominal; 9–40 Vdc maximum)

DR: 8406-103

LS: 8406-113

MC: 8406-114

Terminal blocks are screwless CageClamp style blocks. PT and CT inputs

are fixed screw terminals.

70–300 Vac

5 Aac RMS nominal, 7 Aac RMS maximum –20 to +70 °C operating; –30 to +80 °C storage

95% at +60 °C non-condensing

Meets IP56 (IEC) and Type 4 (NEMA) requirements from the front panel and

properly installed in an equivalent enclosure

Suitable for engine skid or control cabinet

Random Test: 10–2000 Hz at 0.04 G²/Hz and 8.2 Grms PSD

30 g peak, 11 ms duration, non-operating

UL508; CSA Hazardous Locations Class I, Division 2. Groups A–D

IEC Zone 2 European Group IIC

EEC EMC Directive; EEC Low-Voltage Directive

Marine LR

RINA, ABS, and GL classifications

EGCP-3 Applications

• Single Unit—No Utility Parallel

• Single Unit—Utility Parallel

• Multiple Unit—No Utility Parallel

• Multiple Unit—Utility Parallel

• Multiple Unit—Multiple Utility Feeds Parallel