Standby units can not change the governor (speed)
control, or change the voltage level settings
automatically. The governor speed and voltage level
must be preset for the proper operation of the
standby unit. Whenever the set is operated manually,
be sure that the governor speed and voltage levels
are correct for automatic operation. Check all
switches for the proper setting. The start select
switch should be in the AUTOMATIC position.
Emergency Stop Switches should be in RUN
position.
Generator Options
Space Heaters
Most of the SR4B generators are provided with
space heaters. These space heaters are installed for
operation in high humidity conditions. For more
information on space heaters, refer to Maintenance
Section, “Space Heater - Check”.
Embedded Temperature Detectors
SR4B generators are available with embedded
temperature detectors. The detectors are installed in
the slots of the main armature. The main armature is
also called a stator. The detectors are used with the
equipment that is provided by the customer. Thus,
the temperature of the main armature winding can be
measured or monitored. Three types of temperature
detectors are available. Contact your Caterpillar
dealer for more information.
Bearing Temperature Detectors
Bearing temperature detectors are available as an
option on SR4B generators. Bearing temperature
detectors measure main bearing temperature.
Bearing temperature detectors are used with the
equipment that is provided by the customer. Thus,
the temperature of the bearing can be measured or
monitored. Bearing temperature measurements may
help to prevent premature bearing failure. Two types
of temperature detectors are available. Contact your
Caterpillar dealer for more information.
Oilfield Generators
Oilfield generators are available for some generator
sets. Oilfield generators are used with SCR
controlled electric oil rigs. Oilfield generators are not
provided with a voltage regulator. The function of the
generator control is performed by the drilling
electrical control system. Consult the builder of the
drilling rig for any questions that pertain to generator
control such as voltage regulation, paralleling, load
sharing, etc.
SEBU7125-13
95
Operation Section
Generator Operation
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