Quantcast SHUTDOWN SYSTEM WITH 2301 ELECTRIC GOVERNOR CONTROL: NO FAULTS

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ELECTRIC PROTECTIVE SYSTEM
SYSTEMS OPERATION
SHUTDOWN SYSTEM WITH 2301 ELECTRIC GOVERNOR CONTROL:
NO FAULTS
When the 2301 Electric Governor Control (EGC) is used, all systems of
the electronic speed switch (ESS) are activated the same way as shown
with a 3161, UG8D or a UG8L governor. The only difference in the circuit
is that the fuel shut-off solenoid (FSOS) at line 40 is not used, and a jumper
between terminal 26 and 27 is not used.
With the circuit shown in Fig. 10, current normally flows through electric
governor actuator (EGA). When a fault in the system causes current to
energize slave relay (SRI), the contacts open across terminals SR1-1 and
SR1-2 (line 42) and close across terminals SRI-I and SR1-3 (line 40).
When SR1 contacts open across terminals SR1-1 and SR1-2, the current
can no longer flow through the EGA. The mechanical spring load in the
EGA system will now move the fuel control rod to shut the fuel off to the
engine.
NOTE: Except for the differences shown above, all fault circuits for the ESS
system are the same for the EGC as those shown in Fig. 5 through Fig. 9
for the 3161 and UG8 governors.
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