Application Scenarios

A gas turbine at a peaking power plant relies on its Woodward MicroNet control system to sequence the start-up purge, monitor flame detector status, and execute the trip matrix if lube oil pressure falls below safe limits. Every one of these functions depends on discrete signals: limit switches confirming valve positions, pressure switches reporting permissives, and relay outputs commanding fuel solenoids and purge valves. The Woodward 5466-258M sits at the center of this signal web. When a fuel gas isolation valve fails to confirm closed during a purge cycle, the module’s input channel detects the missing permissive and passes the fault state to the CPU, which blocks the start sequence before any fuel can enter the combustion chamber. Without a functioning 5466-258M in that slot, the unit cannot safely start, and the plant faces either an extended outage or an unsafe bypass that no responsible operator would accept.

Parameter

Specifications are compiled from multiple third-party sources. Discrepancies are noted below the table.