Term
13DG
Describe the purpose of 13DG. |
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Definition
-Power to LC-107/108 including UPS Y91 on loss of normal power.
-Provides emergency power to plant computer systems and other auxiliaries. |
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Term
13DG
Describe the auto start of the 13DG. |
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Definition
-Loss of voltage to LC-107 for 10 seconds.
-Once at rated speed and voltage (about 12 seconds) the normal and alt feed to LC-107 open and 13DG output breaker closes.
-Will shed 11SW pump and substation aux loads breaker.
-If loss of voltage to LC-108 for 10 seconds then will close the LC-107/108 tie breaker. |
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Term
13DG
Describe breaker interlocks for LC-107/108 and 13DG. |
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Definition
-If both LC-107/108 feeder breakers and tie breaker closed then 13DG output cannot shut.
-If LC-107/108 feeder breakers and 13DG output breaker closed sends signal to open the tie breaker. |
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Term
13DG
Describe normal shutdown. |
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Definition
| -Automatic no load cooldown for 15 minutes at which point is stops. |
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Term
13DG
Describe the governor operations. |
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Definition
-Can operate in isochronous or droop mode.
-If not in parallel then will automatically operate in isochronous mode.
-If in parallel (senses breaker positions) regulates in droop per the setting (0-13%). |
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Term
13DG
Describe the lube oil cooler. |
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Definition
-Limits oil temp to 210F.
-Alarm at 230F. |
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Term
13DG
Describe fuel oil supply. |
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Definition
-Fuel pump driven by an accessory shaft from the lube oil pump.
-From day tank through filter to transfer pump to main engine filter to fuel racks.
-Maintainless than 125F for no flashing. |
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Term
13DG
Describe 13DG day tank filling. |
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Definition
-Normally from truck.
-Emergency from heating boiler storage.
-Backup from portable gas pump from EDG storage tank. |
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Term
13DG
Describe system starter. |
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Definition
-Uses 2 independent 24Vdc starting subsystems, each with its own 24Vdc battery.
-Best battery selector selects battery with highest voltage for start. |
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Term
13DG
Describe the power rating. |
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Definition
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Term
13DG
Describe the protective device trips. |
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Definition
-EMCP will detect a demand for an emergency stop.
-Engine will s/d by fuel control shut off.
-Some trips have air shut offs.
-On any trip if the engine is not s/d in 10 seconds then the air shut-off valve closes. |
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Term
13DG
Describe the air shut off valve. |
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Definition
-On any trip if engine is not shut down in 10 seconds the air shut-off valve closes.
-Stays closed for 15-20 seconds after engine reaches zero. |
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Term
13DG
Describe the 13DG trips. |
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Definition
-Overspeed: 2160rpm (120%), fuel and air.
-Low lube oil pressure when > 1210rpm: < 30# for 9 seconds, fuel only.
-Low lube oil pressure when < 1210rpm: <10# for 9 seconds, fuel only.
High coolant temp: > 225F for 10 seonds, fuel only.
-Overcrank: fails to start w/in 90 seconds after initial demand (5 crank/rest cycles) start logic stops (cycle 10seconds), must reset to start again.
-Manual: Red emergency stop, air and fuel.
-Manual: Manual close of ASOV or fuel rack handle.
-Manual: Switch to OFF/RESET, fuel.
-Generator breaker trip: auto trip of DG. |
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