Operator's Manual
First Edition • First Printing
Part No. 134207
T70 • T90 • T120
27
Overcurrent Protection
The overcurrent protection relay is mounted behind
the control panel. It monitors the current draw to
protect the generator set. The trip setting is set at
the factory with the proper kW using a loadbank.
Note: Do not change the setting. Generator failure
can occur. Call Terex Service for wiring and
trouble shooting information.
Shutdown Procedures
Never shut the unit down while under load.
This may cause serious injuries to the operator or
damage the generator.
Never shut the unit down with the main
generator circuit breaker in the on position. This
can cause damage to the generator and/or the
connected apparatus.
1 Turn all generator breakers to the off position.
2 Allow the engine to run for 5 minutes under no
load until the coolant temperature gauge reads
approximately 175° F (79° C) as a cool down
cycle.
3 Push the Cascade controller off button to stop
the engine.
4 Switch the toggle switch to the off position.
5 Lock the doors.
Operating Instructions
Do not operate the unit unless the voltage has
been checked at the receptacles. If you have any
questions, call Terex Service at 1-800-433-3026.
Installation and any work performed on this unit
should be done only by a qualified electrician.
Potentiometer (Voltage adjustment)
The potentiometer is set at the factory. However, if
the voltage reading on the voltmeter is not as
desired, follow the procedure below to make the
necessary adjustments.
1 With the unit running under no load, observe the
AC voltmeter.
2 Locate the voltage adjustment knob on the
control panel. To increase the voltage, turn the
knob to the right. To decrease the voltage, turn
the knob to the left.
3 Slowly turn the adjustment knob in the desired
direction while observing the AC voltage meter.
4 Stop when the desired voltage is reached.
The unit is now ready to load. If the desired voltage
cannot be reached, contact the Terex Service
Department at 1-800-433-3026.
For more information, refer to the Murphy Cascade
Controller Installation and Operations Manual part
number 00-02-0594 (Terex part number 833011),
supplied with the unit for configuration and
operation.
Summary of Contents for T120C
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