Term
EDG
Describe the EDG initiation signals. |
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Definition
-High DW pressure: 1.84#.
-Low-low Rx water level: -47".
-Loss of bus voltage: <2625V.
-Degraded bus voltage: <3915V for 9 seconds.
-Fast start relays lock in even if condition clears. |
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Term
EDG
Describe the start failures. |
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Definition
-Pinion failure: <40rpm in 3 seconds.
-Start failure: <125rpm in 4 seconds.
-Fast start relays dont pick up in 1 second.
-Prevents further engine starts after the current cycle until reset. |
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Term
EDG
Describe normal speed and overspeeds. |
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Definition
-900rpm is normal speed.
-High speed stop at 907rpm.
-Over speed trip at 1035rpm (115%). |
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Term
EDG
Describe what happens at 125rpm. |
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Definition
-Generator field flash.
-Ventilation system starts.
-EDG-ESW pump starts.
-Raw water alarm enabled.
-Air start solenoids de-energize.
-Governor booster oil pump stops. |
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Term
EDG
Describe air on different modes of starting. |
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Definition
-Local manual start: both banks.
-If fails to start air starting motors s/d.
-Remote manual: Preferred bank.
-If fails to start air starting motor s/d.
-Emergency start: Preferred bank.
-If fails after 3 seconds air start motor s/d.
-After 1/2 second both banks crank.
-If fails to start after 3 seconds air motors s/d.
-After 1/2 second non selected bank cranks.
-If after 3 seconds fails to start the air starting motor s/d. |
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Term
EDG
Describe the required air pressures. |
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Definition
-Capacity for 5 starts, must have capacity for 2.
-Minimum tech spech: 165#.
-Low air alarm: 169#.
-Min press at gauge: 171#.
-Compressor starts: 177#. |
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Term
EDG
Describe EDG compressor power supplies. |
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Definition
-11 EDG compressor 1/2: MCC-133/143.
-12 EDG compressor 2/1: MCC-133/143. |
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Term
EDG
Describe when the field flashes. |
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Definition
-Fast start: 125rpm.
-Manual start: 870rpm.
-Power to flash is D111/211. |
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Term
EDG
Describe load ratings. |
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Definition
-Minimum loading: 600KW.
-Continuous loading: 2500KW.
-2750KW for 2000 hours a year (if outside air > 101F).
-3050KW for 30 minutes a year (if outside air > 90F). |
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Term
EDG
Describe the fuel oil transfer sequence. |
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Definition
-1 non-safety related pump that normally runs and 1 safety related pump that does not normally run.
-They suck of the stowage dank and fill each EDG day tank.
-Day tanks continuously filled and overflow back to stowage tank.
-Each diesel has 2 AC pumps that pump from day tank to each EDGs base tank (operate on floats).
-Each EDG has a DC pump and engine driven pump that draw from base tank to pistons.
-Motor driven pump supplies all at roughly 125rpm. |
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Term
EDG
Describe the levels for starting/stopping of transfer to the base tanks. |
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Definition
-FTM1 starts at 355gal and stops at 480gals for each EDG.
-FTM2 starts at 190 gal and stops at 225 gal for 11 EDG.
-FTM2 starts at 190 gal and stops at 280 gal for 12 EDG. |
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Term
EDG
Describe the base tank alarms and what happens. |
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Definition
-Low alarm at 190 gal.
-High alarm at 497 gal.
-High level will stop both FTM pumps. |
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Term
EDG
Describe the fuel oil tank requirements. |
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Definition
-Day tank + bast tank gives 8 hour ops at full load.
-Storage tank gives 7 days ops at full load (2500KW).
-Stowage tank capacity 60,000gals minimum is 38,300 gals (8.0'). |
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