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26 Cards in this Set
- Front
- Back
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Ships Service Electrical Distribution Systems |
Ac power Distribution system 450 volts Three phase, 60 Hertz, three wire systems |
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Function of ships service generator & emergency generators |
Produce power for associated switchboard and ship |
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Switchboards provide |
Distribution of electrical power, protection of respective Distribution circuits, controlling, monitoring,and protection of GTG |
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Bus ties |
Connection point between switchboards Isolate or parrell together to share electrical loads |
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Disconnect links |
Disconnect different sections of switchboard from each other |
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Circuit breakers |
Isolate equipment for safety |
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Automatic bus transfer (ABT) |
Transfer electrical load from normal source to emergency source if normal voltage rate drops |
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Manual Bus Transfer (MBT) |
Switching between normal and alt power sources by means of mechanical interlocked circuit breakers |
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Degaussing |
Reduces ships magnetic field |
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Name degaussing coils |
A M FI-QI FP-QP |
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M & FI-QI AND A & FP-QP coils purpose |
M & FI-QI: counteract ships produced magnetic field
A & FP-QP: counteract induced magnetic field changes in ships heading
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Ships service gas turbine generator SSGTG SETS |
NR 1 GTG LOCATED IN MER1 NR 2 GTG LOCATED IN MER2 NR 3 GTG LOCATED IN 3 gen |
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Ships service switchboards locations |
NR 1 swbd located in MER1 NR 2 swbd located in MER2 NR 3 swbd located in 3 swbd room |
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Load centers and locations |
7 total LC11 fwd of post office LC12 fwd of IC room LC21 MER1 LC22 MER2 LC31 aft IC room LC41midship QD fwd LC42 midship QD aft |
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Electric plant control console (EPCC) |
Start, stop, parrel and monitor generators alarm remotely Located in CCS |
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Shore power terminals |
10 cables 400 amps each Located on fantail |
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Shore power switchboard location |
NR3 swbd room |
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Digital synchronizing load control (DSLC) |
How generators communicate with each other and share electrical load while paralled |
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Degaussing folder |
NAVSEA 8950/1 Official ships log for initial calibration of ships degaussing system |
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Function of Automatic load features & stages |
SWBD protect gens from overload 1- secure non vital equipment 2- secure semi vital equipment 3- vital equipment |
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Ethor (embedded turbine high overload recovery) |
Allows generators to operate exceeding its rating for intermittent periods. & Sheds electrical loads if maintained for extended period |
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SSGTG components: make, allison, spins |
Make : roll Royce's Allison 501k-17 model Turbine spins @ 13,821 rpm Generator spins @ 1,800 rpm |
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400hz switchboards |
-Fwd aux 1 (1 STCA & 1 STCB) -Aft 1 deck below electrical shop (2 STCA & 2 STCB) |
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A and M coils detail |
A-loops vertical fore&aft M- encircles ship in horizontal plane(near waterline) |
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Output parameters from the generator |
-Amps:4009 -Kilowatts:2500 -Voltage:450 Vac -Freq: 60HZ -Power factor: .8 -3 phase -Ungrounded system |
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Mk 84 400HZ converters |
Converts 60hz input from swbd to 400 hz for combat systems weaps and equipment |
