SSTG

1
SSTG
62B-216
2
BASIC STEAM CYCLE
GENERATION PHASE
ECONOMIZER
STEAM DRUM
EXPANSION PHASE
BOILER
AUXILIARY CONDENSER
MAIN FEED PUMP
DEAERATING FEED TANK
MAIN FEED BOOSTER PUMP
AUXILIARY AIR EJECTOR CONDENSER
FEED PHASE
CONDENSATION PHASE
3
MAIN STEAM SYSTEM
4
SSTG
TURBINE
FLEXIBLE COUPLING
5
SSTG

• TURBINE -THERMAL ENERGY TO MECHANICAL ENERGY.
• REDUCTION GEARS -REDUCE HIGH SPEED OF TURBINE TO
  A USEFULL GENERATOR SPEED.
• GENERATOR- CONVERTS MECHANICAL ENERGY TO
  ELECTRICAL ENERGY.

6
ELECTRICAL GENERATION

• As the Turbine Turns, the Generator Rotor Turns
  Inside the Stator and Electrical Power Is
  Produced.
• Nearly All SstgS Throughout the Navy Are Rated
  at
• 450 Volts
• 60 Hertz
• 3 Phase

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SPECIFICATIONS

• TURBINE SPEED 9336 - 9956 RPM
• GENERATOR SPEED 1200 RPM
• GEAR TYPE FLEXIBLE COUPLING BETWEEN TURBINE AND
  RED GEAR
• NO FLEXIBLE COUPLING BETWEEN RED. GEAR AND
  GENERATOR

SHIP DEPENDENT
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SSTG
9
LUBE OIL CIRCUITS

• LUBRICATING OIL CIRCUIT
• Supplies lube oil to the reduction gear and
  bearings
• CONTROL OIL CIRCUIT
• Supplies oil to the constant speed governor
  control oil system.
• TRIP OIL CIRCUIT
• maintains the trip throttle valve open admitting
  steam to the turbine until a trip is activated.

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SSTG
TO CONTROL OIL
E
H
TO TRIP OIL
L.O. PUMPS ATTACHED - ELECTRIC - AUTO AT 60
PSIG HAND - VANE TYPE
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TRIP DEVICES

• LUBE OIL TRIP
• OVERSPEED TRIP
• MANUAL TRIP
• BACK PRESSURE TRIP

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SSTG
TO CONTROL OIL
E
H
L
O
B
M
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ALARMS

• HIGH AIR BOX-185OF
• GENERATOR PEDESTAL BEARING- 205OF
• LUBE OIL ALARM-4-5 PSIG

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SAFETY/WARNING DEVICES

• SENTINEL VALVE 2 PSIG
• CASING RELIEF VALVE 10 - 30 PSIG
• LOW L/O PRESS ALARM 4 - 5 PSIG
• HIGH BEARING TEMP 205 DEG F.
• HIGH AIR BOX ALARM 185 DEG F.

15
START UP OF SSTG

• ALIGN L/O SYSTEM
• ALIGN AUX. CIR WATER
• ALIGN AND RECIRC AUX. CONDENSATE
• ALIGN AUX. AIR EJECTORS- AUX STEAM STOP OPEN 200
  TO 400 PSIG

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START UP OF SSTG

• AT 15 IN. VACUUM ALIGN AUX. EXH. AND ROLL SSTG,
  ALIGN GLAND SEAL AND OPEN COND. DISCHARGE
• L/O COOLER OUTLET TEMPERATURE 100 DEG.F THE SSTG
  CAN BE PLACED ON THE GOVERNOR

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PLACE ELECTRICAL LOAD ON SSTG

• L/O COOLER TEMPERATURE 120 DEG.F
• SSTG ON GOVERNOR FOR 25-30 MINUTES
• BOILER IN FULL AUTOMATIC

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SSTG 62B-216