Main wind self-protection
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After the interlock shutdown due to a disruption in the main air supply to the catalytic unit, when is the interlock reset?
After stopping and checking the valve operation, it can be reset by removing the mandatory conditions
After the main fan’s interlock mechanism is activated, the corresponding interlocks for the two reactors as well as the feeding interlock will also be activated. Before preparing to start the main fan, it is necessary to reset all these interlocks. Of course, there is a sequence to this: the main fan interlock is the highest priority, followed by those of the two reactors, and finally the feeding interlock
I agree with what was said on the first floor: as long as it is confirmed that each safety valve is functioning properly, it can be reset. Since all of the steam valves involved in the interlock system are in the fully open position, you need to get ready to resume production immediately.