Manual 26710V1
ProTechTPS Total Protection System
Woodward
11
Chapter 1.
General Information
Description
The ProTechTPS (Total Protection System) is an overspeed safety device
designed to safely shut down steam, gas, and hydro turbines of all sizes upon
sensing an overspeed or over-acceleration event. This device accurately
monitors turbine rotor speed and acceleration via active or passive MPUs
(magnetic pickups) and issues a shutdown command to the turbine’s trip valve(s)
or corresponding trip system. In addition, it has programmable logic and
configurable inputs and outputs to address other safety critical functions.
The ProTechTPS consists of three independent modules whose trip outputs,
dependent upon model used, are either independent or voted in a 2-out-of-3
configuration. An isolated bus architecture is used to share all inputs and latch
status information between the three modules. Optionally each ProTechTPS
module can be configured to use only its sensed “local” input signals or the voted
result of all three modules’ signals in its event latch decision logic. Optionally
module trip and alarm latch statuses can also be configured to be shared with all
other modules.
The ProTechTPS includes Overspeed and Over-acceleration functions as well as
time stamped Alarm, and Trip logs. Indication that a test was active at the time of
the event is provided on all logs and first-out indications are provided for Trip and
Event logs. Trip response time monitoring and logging is also built into the
ProTechTPS.
The ProTechTPS provides various pre-defined and user-definable test features
including automated periodic tests.
There are several ways to interface with the ProTechTPS. The front panel allows
the user to view current values, and to perform certain configuration and test
functions. All of the features and most of the information available from the front
panel is also accessible via the Modbus interface. Finally, the Programming and
Configuration Tool (PCT) is software that is run on a PC to define configurable
inputs and programmable logic, download log files, and manage settings files.
This product is designed for critical applications and when installed correctly
meets API-670, API-612, API-611, and IEC61508 (SIL-3) standards.