TP-6953 7/1946 Section 2 Operation
Note: Overvoltage can damage sensitive equipment in
less than one second. Install separate
overvoltage protection on online equipment
requiring faster than 2-second shutdown.
Overvoltage
Setting Range
Time Delay
Range
Overvoltage Default
Setting
105%- 135% of
nominal
2- 10 sec. 120% at 2 sec.
Figure 2 -9 Overvoltage Specs
High Lube Oil Temperature. The fault lamp illuminates
red, the alarm horn sounds, and the unit shuts down
because of high engine oil temperature. The shutdown
occurs 5 seconds after the engine oil reaches the
temperature shutdown range. The high engine oil
temperature shutdown does not function during the first
30 seconds after startup.
Locked Rotor (failed t o c rank). If none of the speed
sensing inputs show engine rotation within the preset
time delay of initiating engine cranking, the ignition and
crank circuits turn off for the preset period and the cycle
repeats. The fault lamp illuminates red, the alarm horn
sounds, and the unit shuts down after the second cycle
of the preset period of cranking.
Low Coolant Level. The fault lamp illuminates red, the
alarm horn sounds, and the unit shuts down because of
low coolant level. Shutdown occurs 5 seconds after low
coolant level is detected.
Low Engine Oil Level. The fault lamp illuminates red,
the alarm horn sounds, and the unit shuts down
because of low engine oil level. This fault feature
requires an optional low engine oil level sensor for the
lamp to function.
Low Engine Speed. The fault lamp illuminates red, the
alarm horn sounds, and the unit shuts down immediately
when the governed frequency on 50 and 60 Hz models
drops below the under speed setting.
Low Fuel Level (diesel-powered models only). The
fault lamp illuminates red, the alarm horn sounds, and
the unit shuts down when the fuel tank level on
diesel-fueled models approaches empty. This fault
requires an optional low fuel level switch for the lamp to
function.
Low Fuel Pressure. The fault lamp illuminates red, the
alarm horn sounds, and the unit shuts down when low
fuel pressure occurs. This fault requires an optional low
fuel pressure switch for the lamp to function.
Low Generator Frequency. The fault lamp illuminates
red, the alarm horn sounds, and the unit shuts down
when the frequency drops below the underfrequency
setting. See Figure 2-10 for underfrequency
specifications.
Underfreq. Setting
Range
Time Delay
Underfrequency
Default Setting
80%- 95% of
nominal
10 sec. (short term)
60 sec. (long term)
90% of nominal
Figure 2-10 Underfrequency Specs
Low Generator Voltage (Each Phase). The fault lamp
illuminates red, the alarm horn sounds, and the unit
shuts down when the voltage drops below the
undervoltage setting for the time delay period. See
Figure 2-11 for undervoltage specifications
Undervoltage
Setting Range
Time Delay Range
Undervoltage
Default Setting
70%- 95% of
nominal
5- 30 sec.
80% of nominal at
10 sec.
Figure 2-11 Undervoltage Specs
Low Oil Pressure. The fault lamp illuminates red, the
alarm horn sounds, and the u nit shuts down because of
low oil pressure. The shutdown occurs 5 seconds a fter
the low pressure condition is detected. The low oil
pressure shutdown does not function during first the
30 seconds after startup.
Low Seawater Pressure. The fault lamp illuminates
red, the alarm horn sounds, and the unit shuts down
after a loss of seawater pressure is detected.
Max. Alternator Current Low. The fault lamp
illuminates red, the alarm horn sounds, and the unit
shuts down when Alternator Protection Configuration in
the personality profile is not correct. The controller may
need a new personality profile. Check the voltage,
frequency, and connection settings. Consult your local
authorized distributor.
Oil Pressure Open Circuit. The fault lamp illuminates
red, the alarm horn sounds, and the unit shuts down
when the engine oil pressure sender circuit is open for
more than 5 seconds.
Overcrank. The fault lamp illuminates red, the alarm
horn sounds, and cranking stops when the unit does not
start within the defined cranking period. See Section
2.6 for cyclic crank specifications.
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