Emergency Safety Shutdown (ESD)

The Tricon provides continuous protection for safety-critical units in refineries,

petrochemical/chemical plants and other industrial processes. For example,

in reactor and compressor units, plant trip signals—for pressure, product feed

rates, expander pressure equalization and temperature—are monitored and

shutdown actions taken if an upset condition occurs. Traditional shutdown

systems implemented with mechanical or electronic relays provide shutdown

protection but can also cause dangerous nuisance trips.

The Tricon increases system integrity, providing automatic detection and veri

fication of field sensor integrity, inte grated shutdown and control functionality,

and direct connection to the supervisory data highway for continuous monitoring

of safety-critical functions.

Boiler Flame Safety Process steam boilers function as a critical component in

most refinery applications. Protection of the boiler from upset conditions, safety

interlock for normal startup and shutdown, and flame-safety applications are

combined by one integrated Tricon system. In traditional applications, these

functions had to be provided by separate, non integrated components.

But with the fault-tolerant, fail-safe Tricon controller, the boiler operations staff

can use a critical resource more productively while maintaining safety at or

above the level of electromechanical protection systems.