Master Fuel Trip (MFT)
If any of the predetermined master fuel trip condition occurs a master fuel trip is initiated. The first out cause of trip indication is displayed and alarmed.
Conditions of a master fuel trip are:
- All FD Fans off
- All ID Fans off
- Boiler air flow low for 3 secs
- Loss of all fuel
- Loss of all flame
- Furnace pressure very high/Low
- Drum level very high/low
- Critical Flameout
- Delayed light-up
- Re-heater protection operated
Some more Conditions of a master fuel trip (continued) :
- Loss of HT power
- Loss of UPS power
- Loss of 220V DC power
- Condenser vacuum very low
- MFT hard relay tripped
- 2 out of 3 main processors failed
- Both emergency trip push buttons operated
Any of the above occasions will result in a MFT
MFT can be reset when
- None of the above trip conditions exist
- Boiler purge is complete
- Reset MFT is initiated