TP-6734 5/10 39Section 3 Scheduled Maintenance
3.9 Circuit Protection
If the generator set circuit breaker trips or the fuses blow
repeatedly, see Section 4, Troubleshooting, for possible
causes.
3.9.1 Line Circuit Breaker
A line circuit breaker interrupts the generator output in
the event of a fault in the wiring between the generator
and the load. The line circuit breaker location is shown
in Figure 1-2. If the circuit breaker trips, reduce the load
and switch the breaker back to the ON position. With the
breaker in the OFF position the generator set runs but
the generator output is disconnected from the load.
3.9.2 Fuses
A 20-amp circuit breaker protects the alternator and two
fuses protect the electrical controls. See Section 4.2 for
fuse locations. A 10-amp inline fuse protects the battery
charger.
See Figure 3-13 for fuse part numbers. Always identify
and correct the cause of a blown fuse before restarting
the generator set. Refer to Section 4, Troubleshooting,
for conditions that may indicate a blown fuse. Replace
blown fuses with identical replacement parts.
Fuse Label Rating, Amp Part Number
Controller power F3 3 GM66128
Fuel solenoid/
Starter relay/
Throttle control
F2 7.5 GM66129
Battery charger
(RES)
— 10 223316
Figure 3-13 Fuses
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