EPCC/EOOW

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Load Shed Stage 1

110% of GTG load for 100 miliseconds

Stator temp high

120 degrees Celcius

What is generator air temp high?

140 degrees

Low Generator LO pressure

15 PSI alarm (10 PSI shutdown)

When does the low paper alarm go off?

15 ft of paper

What is the normal cooldown period of a GTG?

15 minutes

What is high lube oil temp?

160 degrees

Tape drive high temp

165 degrees

How many summary alarms are there?

17

How many RPM is the GTG?

1800 GRPM

Load shed stage 2

2 seconds after stage 1 activates (affects ACs and VLS heater)

How mant casualty power terminals do switchboards and load centers have?

2, connected to generator side of circuit breaker

High bearing temp

210 degrees

High TIT alarm

2175 degrees

High TIT shutdown

2250 degrees

High module temp

250 degrees

High GTG vibs

3 mils for 3 seconds

When stop is pressed, how long must you wait before a start or motor?

3 minutes

Low generator reduction side shutdown

40 psi alarm (20 psi shutdown )

What is the high current alarm for each shore power breaker?

400 Amps

0 RPM

5th and 10th stage Bleed air opens Aux Lube oil pumps cycle for 15 seconds Starter engages Fuel manifold drain valve opens Fire damper opens Start over temp energized Slow start energized

Reduction ratio of GTG

7.967:1

What is the secondary purpose of the EPCC?

Processes data for DCC

What initiates bell log print?

AN/UYK 44

7500 RPM

Air assist panel deenergizes Ignition exciter off First diffuser bleed air valve closes

Perm APD mode

Allows manual paralleling of generators, provided permissives are met

AN/UYK 44

Processing computer for EOOW

Netcon 5000

Processing unit of LOCOP

What is fault current detect?

At 10000 amps and 59 hz across a closed breaker, opens all bus tie breakers and prevents closure of btbs

What two consoles receive info from EOOW?

BCU and CIC

Shore power load shed Stage 1

Causes stage 1 load shed when load reaches 3190 amps on any shore power breaker

Synchroscope meter

Compares frequency of selected power source to that of oncoming power source

GTG Governor mode switch

Controls speed/frequency

What are the different drive modes for the AN/USH 26?

DR 0, DR 1

12780 RPM

Diffuser, 5th and 10th stage bleed air closes Engine overspeed energizes

What does the EOOW do?

Displays status of equipment/processes data

Where can bell logs be printed from?

EOOW, BCU, PACC

Where are the EOOW plasma displays?

Eoow, BCU, CIC

T/F Module UV flame detectors will release halon

False

DROOP governor mode

Frequency varies based on load

2400 RPM

Fuel drain valve closes Fuel shutoff vlaves open Air assist panel energizes Ignition exciter on Fail to fire energized

Loss of Fuel

Fuel goes below 60 psi above 12225 RPM

What does FADC stand for?

Full authority digital control

GTG fire stop sequence

GTG shuts down Cooling Fan Stops Vent damper shuts 5th, 10th, 14th stage bleed air valves close Alarms go off

12225 RPM (Electronic run)

High vib circuit energizes Engine under speed energizes Engine over temp energizes Loss of fuel circuit energized

What are switchboard dead bus logics?

If SWBD is in local and power is lost, HP starts GTG of affected SWBD

When switching from droop to isoch, what happens to frequency?

Increases

Clockwise synchroscope rotation

Indicates oncoming power source is at a higher rotation

Counterclockwise synchroscope rotation

Indicates oncoming power source is at a lower rotation

Where is the speed temperature box and transient load sensor located?

LOCOP

Icing Condition

Less than 40 degrees greater than 70% humidity

What does DROOP mode disable?

Load sharing

AN/USH 26 tape drive unit

Loads bubble memory and logs data

Switch board out of limit voltage

Low: 428 VAC High: 472 VAC

SWBD out of limit frequency

Low: 58.3 hz High 61.7 hz

ISO governer mode

Maintains frequency regardless of load

Can shore power breakers be closed from EPCC?

No, only locally

Run APD mode

Normal operating position of APD, allows for automatic paralling of Generators

14340 RPM

Normal operating speed

How do is a GTG start aborted?

Off button

DROOP voltage regulator

Output voltage varies depending on load of GTG

15000 RPM

Over speed alarm

15800 RPM

Over speed shutdown

Transient load sensors

Prevents engine stall due to sudden increase of loads. When sudden increase of 500KW is sensed, 14th stage bleed air closes

Circuit breaker selector switch

Selects breaker to be closed, provides interlock between breakers

What direction does the synchro scope rotate when shifting from ship to shore?

Slowly in the slow direction

How do you acknowledge CIC alarms?

Spacebar

Slow start shutdown

Speed doesn't reach 2400 rpm within 30 seconds after button push

Shore power load shed stage 2

Stage 2 load shed occurs if any shore power breaker exceeds 400 amps for 5 seconds. Number of cables x 400 amps =trip point

9100 RPM (Self sustaining speed)

Start air valve closes, starter disengages

When does 14th stage bleed air automatically close?

Starts to close at 2145 degrees, fully closes at 2175 degrees

Bubble Memory

Stores programs that process data, used only on start up

When is APD bypass used?

Sync monitor is inoperative Bringing a power source online from a dead bus When closing last BTB in a loop

Start Overtemp

TIT is higher than 1600-1725 degrees below 12225 RPM

Fail To Fire

TIT is less than 600 degrees within 10 seconds after reaching 2400 RPM

What happens when bleed air is extracted from 14th stage?

TIT raises by 100-150 degrees

What is an indication of post shutdown fire?

TIT stays above 400 after shutdown or raises to 400

Test APD mode

Tests APD, used for PMS

Generator breaker auto trip

Trips generator circuit breaker when fuel pressure drops below 150 psi

When is bubble memory accessed?

Upon start up of console

APD bypass/sync mon bypass

Used to bypass sync monitor

Diff Voltage Regulator

Uses Automatic voltage regulator to bring gtg to 450 VAC upon start

Manual voltage regulator

Voltage moves when switch moves (used for troubleshooting)

When does the AN/UYK initiate a bell log print?

When there is a change in control station Change in bridge order mode Change to shaft speed/pitch change BCU lever is moved to new order mode Every hour

What in the LOCOP controls frequency/speed?

Woodward governor


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