EDG Flashcards
EDG Loss of power TS
Two loss of voltage and two degraded voltage function relays operable
modes 1-4
parameters of the overcrank alarm and the actions
EDG will alarm if cranking signal present for 45 seconds and EDG speed <300 rpm
Take EDG to lockout
design of T-57s
22.5k gallons each
gravity fed
provide 3.5 days of fuel per diesel
fuel system numbers (p-16 a/s & hi dis, t-57 level, day tank #’s & alarms, fo priming pump)
- P-16s a/s 180 gal in day tank, stop @ 240 gal
- fuel oil priming pumps start on edg a/s and stop @ 300 rpm
- P-16 hi discharge press @ 30 psig
- t-57 low @ 155”
- day tank lo level alarm if <180 gal for >3 min
Fuel oil pump is attached to scavenging LO pump and riven from shaft or electrically?
shaft driven
what speed is mechanical overspeed trip
990-1045 rpm
Main lube oil pressure EDG trip
17 psig
Diesel run indication provided when main lube oil pressure is ____.
20 psig
immersion maintain lube oil at what temps
energizes at 125F and deenergizes at 155F
immersion heat is on water side
purpose of soakback pumps
maintain engine oiled and ready to start
immersion heater purpose
warms lube oil for fast start. on water side
compressors cycle on and off at __
on at 186 psig
off at 200 psig
Tech spec for air receiver pressure
<175 psig causes inop of EDG
Receiver tanks are good for ___ starts from each set.
5 starts @ 175 psig
what will disengage air start motors?
engine rpm>300 rpm
air start for 8 seconds
main lo pressure >20 psig