Title of Invention

A FIELD DEVICE FOR MONITORING OPERATING STATE OF AN ELECTRICAL ENGINEERING INSTALLATION

Abstract The invention relates to field device (20, 30, 40) for monitoring operating state of an electrical engineering installation (10), in particular a transformer substation or a switching substation, comprising an evaluation device (100, 110, 120), which is enabled to evaluate signals (E11-E1n, E21-2n) inputted to the electrical engineering installation based on predetermined criteria and, generate an output signal (Ap) with respective evaluation characteristics. An identification ("type A", "type B") is assigned to the evaluation device which specifies the hierarchical level of the evaluation device; the evaluation device is enabled to automatically produce after a connection to a data transmission network (50), a data link with all other evaluation devices of said specific hierarchical level connected thereto or with all other evaluation devices of a predetermined type connected thereto which belong to a directly lower-order or a directly higher- order hierarchical level; and the evaluation device is enabled to process the output signals of hierarchically lower-order evaluation devices as input signals and allow dedicated output signals to be transmitted on to hierarchically higher- order evaluation devices.
Full Text Description
The invention relates to a field device for monitoring an
operating state of an electrical engineering installation
having the features in accordance with the precharacterizing
clause of claim 1.
Such a field device is marketed, for example, by Siemens AG
under the product name "SIPROTEC".
A known focal point in the process management of electrical
engineering installations, in the case of a suddenly occurring
unusual operating state, to identify rapidly and clearly which
state has occurred and which measures need to be taken without
delay. For example, the following faults may occur:
Repeated excitations of an outgoing line result owing to a
distance protection device of the electrical engineering
installation. The ground loop is affected by this. In such a
case, the maintenance personnel of the electrical
engineering installation should attempt, as quickly as
possible, to isolate the faulty line because an object in
the vicinity of the line (tree, motor vehicle etc.) could
possibly be at risk.
If, in the event of a fault, there is no ground loop
involved, the necessary response is different: in this case,
there may be a long-wave cable oscillation, with the result
that the line should remain connected owing to the desired
network stability.
Depending on the fault case, different measures therefore need
to be taken; the knowledge of which measure is the suitable one
in the individual case needs to be filtered out from a very
large amount of available information. The communication
standards used nowadays make available, technically, a very

high data stream and therefore a very large quantity of data,
which needs to be evaluated in control centers,

for example so-called control rooms. Owing to the large number
of data flowing into the control centers, there is the risk of
the maintenance personnel handling it incorrectly.
In order to avoid the problem of too much data flooding into
the control centers, the currently conventional field devices
and also the central control-engineering devices of the control
centers offer "information filters" with which information
compression or information filtering is carried out. This
information compression reduces the items of information to be
evaluated by the maintenance personnel in the control center or
in the control room and therefore reduces the probability of
them being handled incorrectly.
The field devices available today unfortunately have the
disadvantage that it is necessary to establish as early as in
the design phase of an electrical engineering installation
specifically in which way the field devices of the electrical
engineering installation should carry out information
compression and to what the respectively information-compressed
data need to be passed on. With field devices to date it has
therefore been necessary to define the interaction of the
individual components of the electrical engineering
installation in detail in advance. Apart from the fact that
such a design process is very involved and results in high
costs, alterations to the electrical engineering installation
can be carried out subsequently only with a high level of
complexity, since it is virtually necessary to "redesign" the
complete installation.
The invention is based on the object of developing a field
device of the type mentioned at the outset such that it makes
it possible to construct electrical engineering installations
with as low design costs as possible. In addition, a
subsequent alteration to the configuration or the topology of

the electrical engineering installation is possible in a manner
which is as simple and cost-effective as possible.
This object is achieved on the basis of a field device of the
type specified at the outset according to the invention by the

characterizing features of claim 1. Advantageous configurations
of the field device according to the invention are specified in
the dependent claims.
Accordingly, the invention provides that an identification 'can
be assigned to an evaluation device of the field device which
specifies the hierarchical level to which the evaluation device
is assigned. The evaluation device is also designed such that,
after a connection to a data transmission network, it
automatically produces a data link with other evaluation
devices connected thereto - whether this be in fact with all
evaluation devices or with all evaluation devices of a
predetermined type - if these evaluation devices belong to
directly lower-order or directly higher-order hierarchical
levels. The evaluation device then further-processes output
signals (for example output data signals) of hierarchically
lower-order evaluation devices as input signals (for example
input data signals) and transmits its dedicated output data
signals to hierarchically higher-order evaluation devices.
One substantial advantage of the field device according to the
invention can be regarded as the fact that this field device
makes it possible for information items to be precompressed
without the specific processing sequence of the data
compression needing to be defined or established as early as in
the design phase of the electrical engineering installation.
This advantage is achieved by virtue of the fact that the
evaluation device of the field device is automatically "capable
of being interlinked"; this means that the evaluation device is
capable, after a connection to a data transmission network, of
automatically making contact with other evaluation devices and
of automatically creating a hierarchically organized structure
for data evaluation and data compression with these evaluation
devices. In order to make it possible to create the structure,
the only precondition is that an identification is input to
each evaluation device which establishes the hierarchical level

of the respective evaluation device. In contrast to previously
known field devices, in which it is necessary to establish

quite specifically, as early as when the electrical engineering
installation is designed, with which other evaluation devices
data are intended to be interchanged - whether it be with
evaluation devices within one and the same field device or with
"external" evaluation devices of other field devices, it is not
necessary with the field device according to the invention for
each evaluation device to be established specifically; this is
because, on the basis of the input hierarchical level, the
evaluation device itself determines which "partners" are the
"correct ones" for information compression. In other words, the
evaluation device of the field device according to the
invention organizes the formation of its data links and
therefore the manner in which the electrical engineering
installation functions and the sequence of the data compression
automatically by, depending on its respective hierarchical
identification, determining the corresponding evaluation
devices of directly higher-order and lower-order hierarchical
levels, making contact with these evaluation devices and then
cooperating with them. Establishing the partner evaluation
devices in this case takes place only when the field device is
brought into operation or after a connection to a data
transmission network; in the design phase of the electrical
engineering installation, it is not necessary to establish
specific device or data links for the evaluation devices - in
contrast to the previously known field devices. In summary,
according to the invention only one "level" within the later
hierarchy is allocated to the evaluation device of the field
device; the actual data interlinking of the evaluation devices
with one another resulting therefrom establishes this level
itself.
A further substantial advantage of the field device according
to the invention can be considered to be the fact that it can
itself automatically respond to a change in the topology of the
electrical engineering installation. If, for example, new
field devices are added to an existing electrical engineering

installation, in the case of field devices of the previously
known type all required new data links need to be established
by the maintenance personnel "by hand". In contrast to this,
the field devices according to the invention automatically
identify the change in the

topology of the electrical engineering installation themselves
since, when an additional field device is connected, a link is
automatically set up with higher-order or lower-order field
devices; the structure of the data links is therefore matched
automatically to the new installation topology.
The described interlinking of the evaluation devices can take
place internally within the device and/or externally from the
device: if the field device contains "device-internally" for
example two or more evaluation devices, which are connected to
one another via a field-device-internal data transmission
network, it is regarded as being advantageous if the at least
two evaluation devices, in each case after activation of the
field-device-internal data transmission network, automatically
produce a data link with hierarchically directly lower-order
and/or directly higher-order evaluation devices of the
"dedicated" field device.
If the evaluation device is connected to a connection for an
external data transmission network, by means of which the field
device can be connected to other, external field devices, the
evaluation device of the field device is preferably designed
such that, after connection to the external data transmission
network, it automatically produces in each case a data link
with all other evaluation devices connected thereto of other
field devices or with other evaluation devices connected
thereto of a predetermined type if these evaluation devices
belong to a directly lower-order or a directly higher-order
hierarchical level.
Preferably, the evaluation device has a communication device,
which, after a connection to an internal or external data
transmission network, automatically produces a data link with
communication devices of other evaluation devices if these
communication devices belong to a directly lower-order or a
directly higher-order hierarchical level .

An analysis device is preferably connected to the communication
device and further-processes output data signals of analysis
devices of hierarchically lower-order evaluation devices as
input data signals and passes dedicated output data signals on
to analysis devices of hierarchically higher-order evaluation
devices by means of the communication device assigned to it.
Preferably, the analysis device is equipped with a trigger
filter and a case indication filter, which is arranged
downstream of the trigger filter and generates the output data
signals of the evaluation device, the case indication filter
being activated only when the trigger filter has responded. The
evaluation device preferably passes dedicated output data
signals on to hierarchically higher-order evaluation devices
only when the case indication filter has been activated.
The trigger filter and/or the case indication filter are
advantageously supplemented in dynamic fashion, in order to make
it possible to adapt them to changing external circumstances.
During the further-processing of the input data signals of
hierarchically lower-order evaluation devices, information
compression preferably takes place such that the output data
signals have a higher information density than the input data
signals. For example, the information compression takes place
by information components of the input data signals which do
not have any significance or have a subordinate significance
for the characterization of the operating state of the
electrical engineering installation being omitted.
The evaluation device preferably uses data links in accordance
with the standard IEC61850. For example, the analysis device of
the evaluation device compares, as input data signals, the
instantaneous states stored in the object directory of the
IEC61850 standard with state masks or result lists,

which are stored in the field device in a manner which is
specific to the field devices or independent of the field
devices.
In order to determine the installation topology, the evaluation
device preferably evaluates output data signals of a
hierarchically lower-order evaluation device with respect to
the assignment of the lower-order evaluation device in terms of
circuitry within the electrical engineering installation.
Advantageously, the evaluation device in this case uses
installation topology data, which are stored in accordance with
the IEC61850 standard, of the electrical engineering
installation for the topology assignment of the lower-order
evaluation device.
In addition, the invention is considered to be an electrical
engineering installation (an electrical engineering system)
having at least two field devices connected by a data
transmission network.
In order to achieve as low design costs as possible when
designing such an installation and in order to make it possible
to subsequently change the configuration or the topology of the
electrical engineering installation in a manner which is as
simple and cost-effective as possible, the invention proposes
using field devices of the described type according to the
invention. These field devices are designed such that, after a
connection to a data transmission network, they automatically
produce a data link with all other field devices connected
thereto which belong to a directly lower-order or a directly
higher-order hierarchical level. Then, they further-process the
output data signals of hierarchically lower-order field devices
as input data signals and pass dedicated output data signals on
to hierarchically higher-order field devices .

The invention will be explained below with reference to
exemplary embodiments. In the accompanying drawing:

figure 1 shows an exemplary embodiment of an electrical
installation according to the invention having three
field devices according to the invention,
figure 2 shows an exemplary embodiment of an evaluation
device, which is in each case suitable for the three
devices of the arrangement shown in figure 1, and
figure 3 shows a further exemplary embodiment of a field
device according to the invention.
Figure 1 shows an electrical engineering installation 10, which
has three field devices 20, 30 and 40, which are connected to
one another via a data transmission network 50.
The field device 20 is a distance protection device, which is
connected on the input side to measuring transducers 60. The
field device 30 is a differential protection device, upstream
of which, on the input side, measuring transducers 70 are
connected. The field device 40 is a station central controller,
which has a higher hierarchical level than the two field
devices 20 and 30.
As can be seen in figure 1, the three field devices 20, 30 and
40 are each equipped with an evaluation device 100, 110 and
120. The two evaluation devices 100 and 110 belong to a first
hierarchical level and accordingly have a hierarchical
identification "type A". The evaluation device 120 of the
station central controller 40 belongs to a directly higher-
order hierarchical level; accordingly, the hierarchical
identification "type B" is assigned to the evaluation device
120 of the station central controller 40.
The electrical engineering installation shown in figure 1 is
operated as follows:

The evaluation device 100 of the distance protection device 20
and the evaluation device 110 of the differential protection
device 30

in each case evaluate their input data signals Ell, E12, ...,
Eln and, respectively, E21, E22, ..., E2n, which are present on
the input side. The input data signals may originate, for
example, from the upstream measuring transducers 60 or 70 or
from other field devices (not illustrated in figure 1) which
belong to a lower-order hierarchical level.
The evaluation devices 100 and 110 investigate the input data
signals Ell to Eln and, respectively, E21 to E2n, which are
present on the input side, for the presence of predetermined
states stored in the evaluation device. As soon as a
correspondingly stored state is discovered, the evaluation
devices 100 and 110 generate corresponding output data signals
Al and A2, respectively, and transmit these via the data
transmission network 50 to the hierarchically higher-order
evaluation device 120 of the station central controller 40.
In the station central controller 40, the signals Al and A2,
which are present on the input side and thus represent input
data signals of the evaluation device 120, are evaluated once
more. Such an evaluation can take place, for example, by the
data signals Al and A2 which characterize the instantaneous
states of the electrical engineering installation 10 being
compared with stored state masks; if such a comparison is
successful, it is concluded that a predetermined state, for
example a fault state, is present.
The evaluation devices 100, 110 and 120 are designed such that,
after connection to the data transmission network 50, they
automatically search for other evaluation devices which are
connected to the data transmission network 50. Such a "partner
search" can be carried out in a very simple manner, for example
by means of an ETHERNET IP broadcast, as described in RFC 1180
(published, inter alia, on the Internet at
http://www.ietf.org/rfc/rfcll80.txthttp://www.fags.org/rfcs/rfc
1180.html), because this standard allows the devices

which are connected to the data transmission network 50 to
start search requests for partners whose existence is at first
not definitely fixed. For this purpose, the evaluation devices
send corresponding broadcast signals for the link search.
In the context of the search request, each of the evaluation
devices 100, 110 and 120 attempts to produce in each case a
data link to all other evaluation devices which are at a
directly higher-order or lower-order level. In a specific case,
the evaluation device 100 will therefore establish that the
evaluation device 120 which is assigned to the "type B"
hierarchy and is therefore at a higher-order level is present
in the station central controller 40. Accordingly, the
evaluation device 100 will attempt to produce a data link with
the evaluation device 120.
The evaluation device 110 functions in a corresponding manner
and will therefore attempt likewise to enter into a data link
with the evaluation device 120.
Since the two evaluation devices 100 and 110 belong to the same
hierarchical level, the two evaluation devices 100 and 110
will, on the other hand, not attempt to make direct contact
with one another; this is because, in the case of the
electrical engineering installation shown in figure 1, contact
is made exclusively in the direction of a higher or lower
hierarchical level.
The manner in which the evaluation devices 100, 110 and 120
function will be explained in more detail below with reference
to figure 2. Figure 2 illustrates an exemplary embodiment of an
evaluation device which can be used in the distance protection
device 20, in the differential protection device 30 or in the
station central controller 40 shown in figure 1. The exemplary
embodiment of the evaluation device is identified by the
reference symbol 300 in figure 2.

In order to connect it to the data transmission network 50 in
figure 1, the evaluation device 300 has a network connection
N300, which is connected on the input side to a

connection 310 of a communication device 320. The communication
device 320 is connected to an analysis device 340 via a further
connection 330. The analysis device 340 has a trigger filter
350, which is connected on the input side to the further
connection 330 of the communication device 320. On the output
side, a case indication filter 360 is arranged downstream of
the trigger filter 350 and is connected on the output side to
the further connection 330 of the communication device 320.
The evaluation device 300 shown in figure 2 functions as
follows:
As soon as input data signals E1, E2, ... En - for example the
output data signals A1 and A2 of the field devices 20 and 30
shown in figure 1 - are present at the network connection N300
of the evaluation device 300, these input data signals are
received via the communication device 320 and passed on to the
analysis device 340. The trigger filter 350 of the analysis
device 340 compares the input data signals E1 to En, which
represent, for example, instantaneous states of the IEC61850
object directory, with predefined state masks, which are stored
in the trigger filter 350 in a manner which is dependent on the
devices or independent of the devices. The expert knowledge, so
to speak, which is used for evaluating the input data signals
present on the input side, is concentrated in the state masks
of the trigger filter 350.
If a correspondence between the input data signals El to En, on
the one hand, and the state masks, on the other hand, is
established in the trigger filter 350, the corresponding input
data signals - in the example shown in figure 2, for example,
the input data signal Ep - are passed on to the case indication
filter 360. In the case indication filter 360, it is
established whether a fault case, or what kind of' fault case,
corresponds to the input data signal Ep present on the input
side. Depending on the state identified in the case indication

filter 360, an output data signal Ap is generated on the output
side which denotes the state identified in the case indication
filter 360. In this case, the output data signal Ap is

information-compressed in comparison with the input data signal
Ep: this means that the output data signal Ap identifies the
respectively recognized fault state with a smaller quantity of
data than the input data signal Ep.
The output data signal Ap generated by the case indication
filter 360 is passed to the further connection 330 of the
communication device 320 via the connection A340 of the
analysis device 340 and, from there, to the network connection
N300 or to the data transmission network 50 shown in figure 1.
By way of summary, the analysis device 340 therefore has the
function of evaluating input data signals El to En present on
the input side, compressing them in terms of their information
content and generating output data signals Ap which are
information-compressed on the output side. The output data
signals are transmitted to the data transmission network 50
and, from this, again passed on to hierarchically higher-order
evaluation devices.
In the exemplary embodiment shown in figure 2, the analysis
device 340 has only one single trigger filter 350 and one
single case indication filter 360. Alternatively, the analysis
device 340 may also have a plurality of such trigger filters
and case indication filters, which are cascaded or arranged
next to one another hierarchically in a row and are therefore
capable of identifying even very complex operations or states.
The hierarchical arrangement or interlinking of this large
number of filters within the analysis device 340 can be fixedly
predetermined, for example; alternatively, it is also possible
to merely input a hierarchical identification to the respective
filters such that the filters themselves are interlinked, as a
function of their respective hierarchical identification,
within the analysis device 340, as is also carried out in
analogous fashion by the evaluation devices 100, 110 and 120 in
the electrical engineering installation 10 shown in figure 1.

The trigger filter 350 and the case indication filter 360 of
the analysis device 340 may be permanently programmed filters
or filters which can be supplemented in dynamic fashion; in the
latter case, the filter properties can change or be
supplemented in dynamic fashion in order to adapt or improve
the filtering result.
The evaluation device 300 shown in figure 2 can reduce the
flood of information present on the input side in the form of
the input data signals El to En, for example, by using the
analysis device 340 to classify and sort the input data signals
on the basis of event types - such as network errors,
connection operation, voltage dip, harmonics-containing voltage
interference etc., for example. The analysis device 340 can
then summarize the information items detected in this manner
and therefore generate "compressed" output data signals Ap,
which exclusively reproduce the result of the previously
carried out filtering operation. In this case, for example,
installation-specific identifications are also provided along
with the output data signals Ap using the standard IEC61850,
and these identifications make it possible to identify the
installation parts of the electrical engineering installation
10 shown in figure 1 affected by the respective result by means
of the hierarchically higher-order field device (for example
station central controller or central control engineering
device. In order to simplify such an identification of the
affected installation parts, the installation data of the
electrical engineering installation are preferably defined
using the object structure of the standard IEC61850 and made
available to the field devices in a corresponding fashion.
Figure 3 shows a further exemplary embodiment of a field device
according to the invention. This field device 400 has, in
contrast to the field devices shown in figure 1, five evaluation
devices 410, 420, 430, 440 and 450. These evaluation devices

are connected to one another via a field-device-internal data
transmission network 460.
The five evaluation devices, in each case after activation of
the field-device-internal data transmission network 460,
automatically

produce data links, to be precise in each case with
hierarchically directly lower-order and directly higher-order
evaluation devices. As a result, the evaluation devices 410 and
420 (in each case "type A") are connected to the higher-order
evaluation device 430 ("type B"), and vice versa, the
evaluation device 430 with the higher-order evaluation device
440 ("type C"), and vice versa, and the evaluation device 440
with the higher-order evaluation device 450 ("type D"), and
vice versa.
Input signals El to En present on the input side therefore
first arrive at the two evaluation devices 410 and 420 and are
data-compressed there to form intermediate signals Z'. The
intermediate signals Z' arrive at the higher-order evaluation
device 430, which carries out further filtering and forms
compressed intermediate signals Z'. These are in each case
"information-compressed" further still in the evaluation
devices 440 and 450 and arrive as output signals Ap at a
connection A400 for connecting the field device 400 to an
external data transmission network 50.

List of reference symbols
10 Electrical engineering installation
20 Distance protection device
30 Differential protection device
40 Station central controller
50 Data transmission network
60 Measuring transducer
70 Measuring transducer
100 Evaluation device
110 Evaluation device
120 Evaluation device
300 Evaluation device
310 Connection
320 Communication device
330 Further connection
340 Analysis device
A340 Connection
350 Trigger filter
360 Case indication filter
400 Field device
A400 Connection for data transmission network
410-450 Evaluation devices
460 Device-internal data transmission network
E1-En Input data signals
E11-E1n Input data signals
E2-E2n Input data signals
Ap Output data signals


We Claim:
1. A field device (20, 30, 40) for monitoring operating state of an electrical
engineering installation (10), in particular a transformer substation or a switching
substation, comprising an evaluation device (100, 110, 120), which is enabled to
evaluate signals (E11-E1n, E21-2n) inputted to the electrical engineering
installation based on predetermined criteria and, generate an output signal (Ap)
with respective evaluation characteristics, characterized in that
- an identification ("type A", "type B") is assigned to the evaluation device
which specifies the hierarchical level of the evaluation device;
- the evaluation device is enabled to automatically produce after a connection to
a data transmission network (50), a data link with all other evaluation devices of
said specific hierarchical level connected thereto or with all other evaluation
devices of a predetermined type connected thereto which belong to a directly
lower-order or a directly higher-order hierarchical level; and
- the evaluation device is enabled to process the output signals of hierarchically
lower-order evaluation devices as input signals and allow dedicated output
signals to be transmitted on to hierarchically higher-order evaluation devices.


2. The filed device as claimed in claim 1, wherein the field device (400) has at
least two evaluation devices (410 - 450) , which are connected to one another
via a field-device-internal data transmission network (460).
3. The field device as claimed in claim 2, wherein the at least two evaluation
devices, in each case after activation of the field-device-internal data
transmission network, is enabled to automatically produce a data link with
hierarchically directly lower-order and/or directly higher-order evaluation devices
of the field device.
4. The field device as claimed in one of the preceding claims, wherein the field
device has a connection for an external data transmission network (50) for
connection to other, external field devices.
5. The field device as claimed in claim 4, wherein the evaluation device of the
field device after connection to the external data transmission network, is
enabled to automatically produce a data link with all other evaluation devices of
said specified hierarchical level connected thereto of other field devices or with
all other evaluation devices of a predetermined type connected thereto of the
other field devices if these evaluation devices belong to a directly lower-order or
a directly higher-order hierarchical level.


6. The field device as claimed after one of the preceding claims, wherein the
evaluation device comprising:
-a communication device (320), which after a connection to an internal or
external data transmission network, is enabled to automatically produce a data
link with all other communication devices of said specified hierarchical level
connected thereto of other evaluation devices or with all other communication
devices of a predetermined type connected thereto of other evaluation devices if
these communication devices belong to a directly lower-order or a directly
higher-order hierarchical level, and wherein the evaluation device comprising an
analysis device (340), which being connected to the communication device, is
enabled to further- process output signals of analysis devices of hierarchically
lower-order evaluation devices as input signals and pass dedicated output
signals on to analysis devices of hierarchically higher-order evaluation devices
by means of the assigned communication device.
7. The field device as claimed in one of the preceding claims, wherein the
evaluation device, in particular its analysis device, has a trigger filter (350) and
a case indication filter (360) , which is arranged downstream of the trigger filter
to generate the output signals of the evaluation device,
- the case indication filter is activated only when the trigger filter has responded,
and wherein the evaluation device transmits dedicated output signals on to
hierarchically higher-order evaluation devices only when the case indication filter
has been activated.
8. The field device as claimed in claim 7, wherein the trigger filter and/or the
case indication filter is supplemented in dynamic mode.
9. The field device as claimed in one of the preceding claims, wherein during
the further-processing of the input signals of hierarchically lower-order
evaluation devices, information compression commences to provide information
density higher than that of the input signals.
10. The field device as claimed in claim 9, wherein the information compression
commences by information components of the input signals which do not have
any significance or have a subordinate significance for the characterization of the
operating state of the electrical engineering installation being omitted.
11. The field device as claimed in one of the preceding claims, wherein the
evaluation device uses data links in accordance with the standard IEC61850 .
12. The field device as claimed in claim 11, wherein the evaluation device, in
particular its analysis device, uses the instantaneous states stored in the object
directory of the IEC61850 standard as input signals.
13. The field device as claimed in claim 12, wherein the evaluation device, in
particular its analysis device, is enabled to compare the instantaneous states with
state masks, which are stored in the field device in a manner which is specific to
the field devices or independent of the field devices.
14. The field device as claimed in one of the preceding claims, wherein the
evaluation device evaluates output signals of a hierarchically lower-order
evaluation device with respect to the assignment of the lower-order evaluation
device in terms of circuitry within the electrical engineering installation.
15. The field device as claimed in claim 14, wherein the evaluation device
adapts installation topology data, which are stored in accordance with the
IEC61850 standard, of the electrical engineering installation for the assignment
of the lower-order evaluation device in terms of circuitry.
16. An electrical engineering installation having at least two field devices
connected by a data transmission network as claimed in one of the preceding
claims.

Documents:

00693-kolnp-2007 correspondence-1.1.pdf

00693-kolnp-2007 others document.pdf

00693-kolnp-2007 pct others.pdf

00693-kolnp-2007-correspondence-1.2.pdf

00693-kolnp-2007-form-18.pdf

0693-kolnp-2007-abstract.pdf

0693-kolnp-2007-assignment.pdf

0693-kolnp-2007-claims.pdf

0693-kolnp-2007-correspondence others.pdf

0693-kolnp-2007-description (complete).pdf

0693-kolnp-2007-drawings.pdf

0693-kolnp-2007-form1.pdf

0693-kolnp-2007-form2.pdf

0693-kolnp-2007-form3.pdf

0693-kolnp-2007-form5.pdf

0693-kolnp-2007-international publication.pdf

0693-kolnp-2007-international search authority report.pdf

0693-kolnp-2007-pct form.pdf

693-KOLNP-2007-ABSTRACT 1.1.pdf

693-KOLNP-2007-AMANDED CLAIMS.pdf

693-KOLNP-2007-CORRESPONDENCE 1.1.pdf

693-kolnp-2007-correspondence.pdf

693-KOLNP-2007-DESCRIPTION (COMPLETE) 1.1.pdf

693-KOLNP-2007-DRAWINGS 1.1.pdf

693-kolnp-2007-examination report.pdf

693-KOLNP-2007-FORM 1-1.1.pdf

693-kolnp-2007-form 18.pdf

693-KOLNP-2007-FORM 2-1.1.pdf

693-KOLNP-2007-FORM 3-1.1.pdf

693-kolnp-2007-form 3.pdf

693-kolnp-2007-form 5.pdf

693-KOLNP-2007-FORM-27-1.pdf

693-KOLNP-2007-FORM-27.pdf

693-kolnp-2007-gpa.pdf

693-kolnp-2007-granted-abstract.pdf

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693-kolnp-2007-granted-description (complete).pdf

693-kolnp-2007-granted-drawings.pdf

693-kolnp-2007-granted-form 1.pdf

693-kolnp-2007-granted-form 2.pdf

693-kolnp-2007-granted-specification.pdf

693-KOLNP-2007-OTHERS.pdf

693-kolnp-2007-others1.1.pdf

693-KOLNP-2007-PETITION UNDER RULE 137.pdf

693-KOLNP-2007-REPLY TO EXAMINATION REPORT.pdf

693-kolnp-2007-reply to examination report1.1.pdf

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Patent Number 247989
Indian Patent Application Number 693/KOLNP/2007
PG Journal Number 23/2011
Publication Date 10-Jun-2011
Grant Date 08-Jun-2011
Date of Filing 26-Feb-2007
Name of Patentee SIEMENS AKTIENGESELLSCHAFT
Applicant Address WITTELSBACHERPLATZ 2, 80333 MUNCHEN
Inventors:
# Inventor's Name Inventor's Address
1 Andreas JURISCH EICHENWEG 11 16727 SCHWANTE
2 Volker WENZEL THEODOR-STORM-STR. 35 16540 HOHEN NEUENDORF
PCT International Classification Number G05B 19/418
PCT International Application Number PCT/DE2005/001128
PCT International Filing date 2005-06-22
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA