Woodward ProAct III, Инструкция по установке и эксплуатации

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ProAct III/IV Actuator/Driver Manual 04127
14 Woodward
ProAct III actuator stops are designed to absorb 1.1 J (10 in-lb) of kinetic energy
with 3 degrees overtravel. ProAct IV actuator stops are designed to absorb 2.3 J
(20 in-lb) of kinetic energy with 3 degrees of overtravel. If the actuator travel
stops are used, the linkage must be designed to allow this 3 degree overrun.
Use good rod-end connectors with as little free play as possible. Select rod ends
which will not become loose and which will wear well during the nearly constant
movement associated with precise speed control. Low-friction, long-wearing rod
ends are available from Woodward.
The link connecting the actuator lever to the fuel-control lever must be short and
stiff enough to prevent flexing when the engine is running.
Actuator levers are available from Woodward which allow adjustment of the rod-
end location with respect to the center of the actuator shaft. The lever used must
have a 0.625-36 serration to fit on the ProAct III actuator or 0.750-48 serration to
fit on the ProAct IV actuator.
Adjust the location of the rod end on the lever to achieve the desired rotation of
the actuator shaft between minimum and maximum positions. (Use as much of
the 75° rotation as possible, at least 60°.) To increase the amount of rotation,
move the rod end closer to the actuator shaft or farther away from the shaft
controlling fuel flow. To decrease the amount of rotation used, move the rod end
farther from the actuator shaft or closer to the shaft controlling fuel flow.
Electrical Connections
External wiring connections and shielding requirements for a typical control
installation are shown in the plant wiring diagram (see Figure 1-4).
Use 8, 6, or 4 mm² (8, 10, or 12 AWG) wire throughout the ProAct circuit. The
total distance from the battery to the driver and from the driver to the actuator
must not exceed the maximum wire length indicated in the following formula:
one-half the battery-wire length plus the actuator wire length must be less than or
equal to 12.2 m.
For example:
actuator wire length (4 mm²) battery wire length (4 mm²)
3.1 m max. 18.2 m max.
6.1 m max. 12.2 m max.
9.1 m max. 6.2 m max.
Actuator wire lengths may be multiplied by 1.6 for 6 mm² (10 AWG) wire.
Actuator wire lengths may be multiplied by 2.5 for 8 mm² (8 AWG) wire.
Shielded Wiring
All shielded cable must be twisted conductor pairs. Do not attempt to tin the
braided shield. All signal lines should be shielded to prevent picking up stray
signals from adjacent equipment. Connect the shields to the correct pins on the
driver connector or wiring. Do not connect shields to the actuator ground. Wire
exposed beyond the shield should be as short as possible, not exceeding 50 mm
(2 inches). The other end of the shields must be left open and insulated from any
other conductor. DO NOT run shielded signal wires along with other wires
carrying large currents. See Woodward application note 50532,
EMI Control for
Electronic Governing Systems , for more information.