If the panel meters show that the generator voltage is different from that of the bus, the voltage offset potentiometer may need adjustment. Make sure that the
panel meters are accurate, calibrated, and at operating temperature. Most panel meters are accurate to ±3% and are not temperature compensated.
Custom installation kits, including actuator mounting hardware, linkage, and
actuator wiring harness, are available for some specific engines. Contact
Woodward for more information.
The engine, turbine, or other type of prime mover should be
equipped with an overspeed shutdown device to protect against
runaway or damage to the prime mover with possible personal injury,
loss of life, or property damage.
The overspeed shutdown device must be totally independent of the
prime mover control system. An overtemperature or overpressure
shutdown device may also be needed for safety, as appropriate.
Speed Control Mounting
The speed control is designed to operate within a temperature range of
–40 to +75 °C (–40 to +167 °F). Mount the control in a location with space for
adjustment and wiring access. If mounted on the prime mover, do not expose the
speed control to sources of radiant heat such as exhaust manifolds or
turbochargers. Also choose a protected location so that the control won’t be
damaged when moving the prime mover or when equipment is moving near by.
Mount the control close to the actuator and battery to meet the wire length
requirements. Allow for adequate ventilation.
The EPG speed control must be mounted on a metal plate that is at the same
ground potential as the case. The case and mounting plate must be grounded to
either the protective earth of the building or, if no protective earth is available, the
frame ground of the engine/skid.
Actuator Mounting and Linkage
MOUNTING SCREWS
0.250-20 (inch) thread. Minimum mounting screw
engagement should be 9.5 mm (0.375 inch).
Torque screws to 9–11 N·m (80–100 lb-in). Use
star washers between the screw heads and
control body to break paint and ground the
EPG chassis to the mounting plate.
Actuator location must allow installation of a
suitable linkage. The actuators are designed
to operate within a temperature range of –40
to +93 °C (–40 to +200 °F). Do not expose
the actuator to sources of excessive heat.
Match the actuator’s direction of rotation for
increased fuel with the fuel control’s direction
of rotation for increased fuel by choosing a
suitable linkage.
