www.siemens.com/energy
Transforming knowledge
into availability
SITRAM® MONITORING from TLM™ – Transformer Lifecycle Management™
Answers for energy.
Two key tasks for today’s transformers:
Managing values and increasing availability
There are many reasons why your power transformers
must function reliably around the clock: the high
demands of your customers and processes, increasing
load requirements, ever-scarcer backup power …
That’s why you need monitoring solutions that provide
constant information about the current status of your
equipment – so you can take proactive steps to ensure
high availability and a longer service life.
In many countries today, over 70 percent of transformers
have been in use for over 25 years. The actual average
service time often exceeds the estimated service life.
Backup transformers are already being used for routine
operations, and in many cases, spare parts are no longer
available. Moreover, the transformers are not just being
used at their nominal capacity but even to the maximum
load capacity
Detect faults earlier –
it’s definitely more cost-efficient.
Under these circumstances, it’s obvious that solutions are
needed to provide operators with a clear picture of the
status of installed transformers at all times.
The primary goals:
Avoiding unplanned downtimes and associated subsequent damage through risk prognosis and the early
detection of errors
Operating the transformers without incurring damage
during brief periods of overload
Using condition-based maintenance to streamline maintenance activities and minimize downtimes

Always on alert:
SITRAM® Guards

SITRAM® Condition Monitor
at an industry transformer
SITRAM®: Knowledge that increases availability
Guards directly on the transformer:
SITRAM® Guards
The family of SITRAM® Guards is comprised of standardized, proven online sensor technolo­gies as stand-alone
solutions for individual transformers. Different kinds of
warning instruments alert staff if deviations develop that
might lead to errors or unplanned downtimes. This applies
also if diagnostic or repair measures become necessary.
All key parameters at a glance:
SITRAM® Condition Monitor (CM)
SITRAM® Condition Monitor (CM) is a modular system
which integrates information from individual sensors, and
the SITRAM® Guards, for every transformer. This monitoring of limit values – with a set of standard interpretation
algorithms – is a cost-effective way to keep an eye on
essential transformer parameters.
GAS-Guard
› Online gas-in-oil analysis
PD-Guard
› Partial-discharge monitoring
BUSHING-Guard › Bushing monitoring
TAPGUARD®
› On-load tap changer monitoring
The measured values are stored locally in a data acquisition unit and can be accessed remotely via various sophisticated communication interfaces.
Various visual display systems are avail­able depending
upon the customer’s philosophy. Whether on LCD displays
or Web-based visualizations, the measured data can
always be depicted in a user-friendly way.
Example of user-friendly data isualization
Working together, we can define the “best-fit” solution for your needs. SITRAM® MONITORING has a modular
structure and can be configured to precisely meet your requirements – whether for individual transformers or
complete fleets – regardless of manufacturer, power, or year of manufacture.
KM
KM
KM
Circuit breaker
Disconnector
Equipment n
Central
control center
SICAM Monitoring
RTU
Guards
Sensors
Local station
automation
Transformer 1
Transformer 2
Transformer n

Our experts are also happy to interpret measured
values for you

Technology that translates
into a valuable gain in availability for your transformers
All transformers on the screen:
SITRAM® integrated Condition
Monitoring System (iCMS)
Whether you’re dealing with transmission and distribution networks, power plants, or large industrial plants,
SITRAM® iCMS (integrated Condition Monitoring System)
is the across-the-board solution for your transformers.
This monitoring concept is designed to use control and
instrumentation technology to take advantage of synergies. That means it optimally utilizes components and sensors. At the same time, the control and instrumentation
technology provides the platform for transformer-specific
Knowledge Modules (KM). The KMs can calculate the
transformer’s operating and status parameters on the
basis of available measured values, design parameters,
and historical events.
More reliable decision making with specialized
expertise: SITRAM® MONITORING Service
Siemens offers more than just hardware and software
solutions for customized monitoring. If you wish, our
experts will also consult with you personally; for example,
to investigate possible sources of errors or to recommend
and plan specific repair measures. If desired, our technical
personnel can also handle delicate transformers via
remote access.
Choosing a monitoring solution from Siemens TLM™ –
Transformer Lifecycle Management™ also gives you the
option of accessing our entire service portfolio.
Every detail of your transformer at a glance
TLM@siemens.com
www.siemens.com/energy/TLM
Everything at a glance – preventing unplanned downtimes
Our modular solution:
Online monitoring with SITRAM®
Whether it is in power plants, industrial plants, or
transmission and distribution networks, the strategic
importance of every transformer demands individual
monitoring. And that’s exactly what SITRAM® delivers
with Siemens’ modular online monitoring solution.
Every system in the SITRAM® MONITORING family provides continuous online monitoring of transformers.
Experience has shown that early detection of errors is simply not possible without online monitoring. It allows measures for troubleshooting and repair to be planned and
scheduled in advance, which means greater availability
and a longer service life for your transformers.
All levels of the SITRAM®
MONITORING concept:
More reliable decision making
with specialized expertise
All transformers shown on one screen
Condition Monitor
All key parameters at a glance
Guards
Guards directly on each transformer
Monitoring Service
iCMS
5
Published by and copyright © 2011
Siemens AG
Energy Sector
Freyeslebenstr. 1
91058 Erlangen, Germany
Siemens AG
Energy Sector
Transformer Lifecycle Management™
Katzwanger Str. 150
90461 Nuremberg, Germany
E-Mail: TLM@siemens.com
www.siemens.com/energy/TLM
For more information, please contact our
Customer Support Center
Phone:+49 180/524 70 00
Fax: +49 180/524 24 71
(Charges depending on provider)
E-Mail: support.energy@siemens.com
Power Transmission Division
Order No. E50001-G640-A103-X-4A00 | Printed in Germany | Dispo No. 19200 | c4bs No. 7487 |
GB 110348 RP 472264 | WS | 07113.0
Printed on elementary chlorine-free bleached paper.
All rights reserved.
Trademarks mentioned in this document are the property of Siemens AG, its affiliates, or their
respective owners.
Subject to change without prior notice.
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 therefore be specified in the contract.
TAPGUARD® is a registered trademark of Maschinenfabrik Reinhausen GmbH