Turbine Protection System (TPS)
Standard Solutions
Application:

Westinghouse
GE

Siemens

Allis Chalmers

MHI


Delaval
ABB

Alstom

Fuji

Toshiba

The Turbine Protection System (TPS) is
an electrical control and field sensor
modernization package designed to
replace the existing legacy protection
system on steam turbines. The TPS can
enhance turbine availability with
features of 2-out-of-3 voting for
pressure and speed sensors.
Different option combinations can be
incorporated within the core design
providing a customized solution built
around the specific units requirements.
The Redundant Testable Trip Device
(below) combines vacuum, thrust, low
bearing oil pressure, and trip block
configuration in one freestanding unit.
The TPS system is available for high
pressure hydraulic systems and low
pressure hydraulic systems.
The TPS system can be used in both
power and industrial applications.
High Pressure Redundant Testable Trip Device
SPPA-R3000 Turbine Protection System
Energy
Instrumentation, Controls & Electrical
Potential Benefits

Fits within maintenance budget

Reduce downtime – on-line testing

Reduce human error – automated
testing

Extend service life – minimize stress
during testing

Improve turbine availability –
simplified on-line maintenance

Eliminate single point failures

Built-in first out trip indication
Features

2 out of 3 voting standard (other
options available)

5 millisecond scan time on overspeed
protection

Automated test routines

On line diagnostics

Pre-configured operating modes for
system failures

Built in user interface

Built in DCS interface

Communicates with any DCS

Proven reliable Siemens PLC

Upgradeable modular packages

24-hour customer support

Siemens world class service
Turbine Mechanical Conversion
Available Option
The standard conversion package
involves a new trip system, where as the
existing trip block and overspeed bolt
are eliminated and replaced with a 2
-out-of-3 voting architecture.
■  An upgraded user interface with color
display and trending capability
The panel contains new triplicated field
devices for the parameters monitored.
Each device within the panel is on-line
testable. Field transmitters may be
calibrated on-line. Most components are
on-line repairable / replaceable as well.
■  Electronic Turbine Thrust proximitors
to replace legacy mechanical systems
■  EHC interposing relays to allow for
■  Plant trips to be included in the first
-out trip display
■  Zero speed detection
■  Mechanical only package available
Low pressure TPS can be easily and cost
effectively upgraded to high pressure
TPS in the future if the plant changes
from MHC to EHC after a low pressure
TPS has been installed.
Process Configurations
A true 2-out-of-3 voting system, the
standard TPS electronics packages
consist of three processors monitoring
all trip inputs. Each processor
independently decides to issue a trip
based on its set of inputs. All three of
the processors share their input and
output status signals for alarming and
testing functions.
Optional processor configurations
include:
■  Fault tolerant redundant processors
■  Simplex processor for cost sensitive
applications
Published by
and Copyright 2008:
Siemens Energy, Inc.
Instrumentation, Controls &
Electrical
1345 Ridgeland Parkway, Suite 116
Alpharetta, GA 30004 USA
Tel: 678.256.1500
Fax: 678.256.1553
siemens.com/energy/controls
All rights reserved.
Subject to change without prior notice.
Printed on paper treated with chlorinefree bleach.
Trademarks mentioned in this document
are the property of Siemens AG, its
affiliates, or their respective owners.
The information in this document contains
general descriptions of the technical
options available, which may not apply in
all cases. The required technical options
should there-fore be specified in the
contract.
Operator Monitor (Optional) Display
High Volume Trip Block Assembly for
Low or High Pressure System