Title of Invention	A PROTECTIVE DEVICE FOR AN ELECTRICAL CONNECTION OF A TRANSFORMER
Abstract	The invention relates to a protective device (2) having a circuit breaker (3), in particular a low-voltage circuit breaker, for an electrical connection of a transformer (1), in particular a medium-voltage transformer, to a load (V), the transformer (1) being operated on the secondary side in star-connected fashion, and the connection taking place via at least three phase conductors (L1,L2,L3) and a neutral conductor (N), an overcurrent device being arranged between the transformer (1) and the load (V), and between a first switching device (5,6) and having first magnetoelectric transducers (4) arranged on each phase conductor (L1,L2,L3) and the neutral conductor (N), which transducers (4) each emit a transducer current, the overcurrent device in each case establishing the presence of a first ground-fault current using the transducer currents, and the circuit breaker (3) having a switching device, which interrupts at least the phase conductors (L1,L2,L3) between the transformer (1) and the load (V) in the event of the presence of a first ground-fault current, in each case second magnetoelectric transducers (8) are provided simultaneously between the star connection and the overcurrent device on each phase conductor (L1,L2,L3), the neutral conductor (N) and a star-point conductor (9) connected at the star point, the star-point conductor (9) being connected to ground, in that in each case the presence of a second ground-fault current is determined using the transducer currents of the second transducers (8), and in that in the event of the presence of a second ground-fault current, a signal for disconnecting the transformer (1) is formed.

Title of Invention

A PROTECTIVE DEVICE FOR AN ELECTRICAL CONNECTION OF A TRANSFORMER

Abstract

The invention relates to a protective device (2) having a circuit breaker (3), in particular a low-voltage circuit breaker, for an electrical connection of a transformer (1), in particular a medium-voltage transformer, to a load (V), the transformer (1) being operated on the secondary side in star-connected fashion, and the connection taking place via at least three phase conductors (L1,L2,L3) and a neutral conductor (N), an overcurrent device being arranged between the transformer (1) and the load (V), and between a first switching device (5,6) and having first magnetoelectric transducers (4) arranged on each phase conductor (L1,L2,L3) and the neutral conductor (N), which transducers (4) each emit a transducer current, the overcurrent device in each case establishing the presence of a first ground-fault current using the transducer currents, and the circuit breaker (3) having a switching device, which interrupts at least the phase conductors (L1,L2,L3) between the transformer (1) and the load (V) in the event of the presence of a first ground-fault current, in each case second magnetoelectric transducers (8) are provided simultaneously between the star connection and the overcurrent device on each phase conductor (L1,L2,L3), the neutral conductor (N) and a star-point conductor (9) connected at the star point, the star-point conductor (9) being connected to ground, in that in each case the presence of a second ground-fault current is determined using the transducer currents of the second transducers (8), and in that in the event of the presence of a second ground-fault current, a signal for disconnecting the transformer (1) is formed.

Full Text	Description Protective device having a circuit breaker, in particular a low-voltage circuit breaker The invention relates to a protective device having a circuit breaker, in particular a low-voltage circuit breaker, in accordance with the preamble of claim 1. It is known to provide low-voltage circuit breakers with overcurrent releases, which can also include protection against ground faults in addition to protection against overloads and short circuits. The determination of the ground-fault current can take place via the formation of the phasor sum of the phase currents or else the ground-fault current flowing back towards the feed is measured by means of a transducer. In this case, however, only the ground-fault current flowing through the circuit breaker (unrestricted earth fault) can be determined. In installation applications, however, it may be necessary to also determine a ground fault between the feed (medium-voltage transformer) and the circuit breaker (restricted earth fault) in addition to the ground-fault current flowing through the low-voltage circuit breaker. The object of the invention is to specify a protective device having a circuit breaker which can also determine the ground- fault current between the feed (transformer) and the circuit breaker (restricted earth fault). The object is achieved by the features of claim 1; the dependent claims relate to advantageous configurations. The solution envisages that in each case second magnetoelectric transducers are provided simultaneously between the star connection of the transformer and the overcurrent device on each phase conductor, the neutral conductor and a star-point conductor, which is connected to ground and is connected at the star point, that in each case the presence of a second ground- fault current is determined using the transducer currents of the second transducers, and that, in the event of the presence of a second ground-fault current, a signal for disconnecting the transformer is formed. In the event of detection of a ground-fault current, a message in the form of a signal is now generated by the overcurrent device (by the "overcurrent release"), and this message can be used to disconnect the transformer or the feed. The monitoring of ground faults between the transformer (the feed) and the circuit breaker can in this case easily be integrated into the overcurrent device of the circuit breaker as a side effect. The safety of the protective device can be improved if, in the event of the presence of a first and/or a second ground-fault current, the value of said ground-fault current is determined in each case, and if the interruption in the event of the presence of a first ground-fault current or the disconnection in the event of the presence of a second ground-fault current only takes place if this value in each case exceeds a predetermined limit value. A simple protective device provides that the second transducers are connected to one another in such a way that a residual current is formed. It is technically simple if the second transducers have coils as the sensor elements. In a simple embodiment, all of the coils of the second transducers are connected in parallel. Expediently, the determination of the ground-fault current in each case takes place using the residual current or using the phasor sum of the phase currents. In an operation-friendly protective device, the signal for disconnecting the transformer is displayed optically. In terms of control technology it is simple if the signal for disconnecting the transformer is output via a bus, which in turn is connected to a relay module, which triggers the disconnection of the transformer by means of its relay contacts when the signal for disconnecting the transformer is present. A compact configuration provides that the phase conductors and the neutral conductor run through the circuit breaker, and the signal for disconnecting the transformer is displayed optically on the circuit breaker. It is yet more operation-friendly if during and/or after disconnection of the transformer, a feedback signal is generated and is displayed optically on the circuit breaker. The invention will be described in more detail below with reference to a drawing. The single figure shows, in a schematic illustration, a transformer 1 (in this case a medium-voltage transformer), which is operated on the secondary side in star- connected fashion and is connected to a load V via phase conductors L1, L2, L3 and a neutral conductor N. Furthermore, the figure shows a protective device 2, which comprises a circuit breaker 3. The phase conductors L1, L2, L3 and the neutral conductor N are passed through the circuit breaker 3. The circuit breaker 3 has an overcurrent protective device, whose magnetoelectric transducers 4 are shown in figure 4. The transducers 4 are coils which comprise the associated conductors L1, L2, L3, N in each case and act as sensor elements for the currents flowing through the conductors L1, L2, L3, N. All of the transducers 4 are electrically connected to a central processor unit TU (Trip Unit), which has a software-controlled processor (not illustrated). Each transducer 4 emits a corresponding transducer current to the processor unit TU, which establishes the presence of a ground- fault current using the transducer currents in relation to the figure below the circuit breaker 3 (first ground-fault current, unrestricted earth fault). The determination of the ground- fault current takes place in each case using the residual current (or using the phasor sum) of the phase currents detected via the transducers 4. Furthermore, the circuit breaker has a switching device whose tripping magnet 5 is illustrated in the figure. The tripping magnet 5 actuates a switch with a plurality of switch contacts 6 in the event of the presence of a ground-fault current in order to interrupt the phase conductors L1, L2, L3 between the transformer 1 and the load V. As shown in the figure, in this case the neutral conductor N is also interrupted. The activation of the tripping magnet 5 takes place by means of a tripping signal emitted by the processor unit (TU), which is illustrated schematically here as arrow 7. The protective device also includes further magnetoelectric transducers 8, which are illustrated above the circuit breaker 3 in the figure and, similarly to the transducers 4, surround the associated conductors L1, L2, L3, N and in addition here the star-point conductor 9, which is connected to the star point of the star connection and to ground 10, the element 11 in the figure schematically illustrating a releasable connection to ground 10. The transducers 8 are in the form of coils, which are all connected in parallel. The interconnection makes it possible to form a corresponding residual current and to determine the occurrence of a ground-fault current using the residual current. (Of course the ground-fault current could also be determined using the phasor sum of the phase currents). The figure shows that the interconnected transducers 8 are connected to the processor unit TU. In order to evaluate the transducer currents, in this case the same algorithm is used as for the transducer currents of the transducers 4. If the presence of a ground-fault current (second ground-fault current, restricted earth fault) is determined using the transducer currents of the transducers 8, the processor unit TU generates a signal for disconnecting the transformer 1, which signal is output via a bus 12. At the same time, the signal is displayed via an optical display 13 on the circuit breaker 3. The bus 12 is connected to a module 14, which, when the signal for disconnecting the transformer 1 is output, triggers the disconnection of the transformer 1 via the switching unit 16 by means of its contacts 15 (connecting line 17) , in which case the module 14 may also be a relay module with its relay contacts. After disconnection of the transformer 1, the unit 16 generates a feedback signal, which is fed back to the circuit breaker 3 (connecting line 18). Using this fed-back signal, a further tripping magnet 19 is switched, which tripping magnet opens the switch contacts 6, to be precise independently of the tripping magnet 5. In this case, a microswitch 20 is opened, with the result that the disconnection of the transformer and the position of the switch contacts 6 can be interrogated. This can also be displayed optically on the circuit breaker 3. The interruption or the disconnection in the event of the presence of a ground-fault current only takes place if this value in each case exceeds a predetermined limit value. The protective function for this ground-fault current (restricted earth fault) can likewise be parameterized with respect to the response values and the delay times in the overcurrent device, using the interfaces of the circuit breaker 3. This can also take place via the bus 12, via which remote diagnosis is also possible. We Claim: 1. A protective device (2) having a circuit breaker (3), in particular a low- voltage circuit breaker, for an electrical connection of a transformer (1), in particular a medium-voltage transformer, to a load (V), the transformer (1) being operated on the secondary side in star-connected fashion, and the connection taking place via at least three phase conductors (L1,L2,L3) and a neutral conductor (N), an overcurrent device being arranged between the transformer (1) and the load (V), and between a first switching device (5,6) and having first magnetoelectric transducers (4) arranged on each phase conductor (L1,L2,L3) and the neutral conductor (N), which transducers (4) each emit a transducer current, the overcurrent device in each case establishing the presence of a first ground-fault current using the transducer currents, and the circuit breaker (3) having a switching device, which interrupts at least the phase conductors (L1,L2,L3) between the transformer (1) and the load (V) in the event of the presence of a first ground-fault current, characterized in that in each case second magnetoelectric transducers (8) are provided simultaneously between the star connection and the overcurrent device on each phase conductor (L1,L2,L3), the neutral conductor (N) and a star-point conductor (9) connected at the star point, the star-point conductor (9) being connected to ground, in that in each case the presence of a second ground-fault current is determined using the transducer currents of the second transducers (8), and in that in the event of the presence of a second ground-fault current, a signal for disconnecting the transformer (1) is formed. 2. The protective device as claimed in claim 1, wherein in the event of the presence of a first and/or a second ground-fault current, the value of said ground-fault current is determined in each case, and in that the interruption in the event of the presence of a first ground-fault current or the disconnection in the event of the presence of a second ground-fault current only takes place if this value in each case exceeds a predetermined limit value. 3. The protective device as claimed in claim 1 or 2, wherein the second transducers (8) are connected to one another in such a way that a residual current is formed. 4. The protective device as claimed in one of claims 1-3, wherein the second transducers (8) have coils as the sensor elements. 5. The protective device as claimed in claim 4, wherein all of the coils of the second transducers (8) are connected in parallel. 6. The protective device as claimed in one of claims 1-5, wherein the determination of the ground-fault current in each case takes place using the residual current or using the phasor sum of the phase currents. 7. The protective device as claimed in one of claims 1-6, wherein the signal for disconnecting the transformer (1) is displayed optically. 8. The protective device as claimed in one of claims 1-7, wherein the signal for disconnecting the transformer (1) is output via a bust (12), which in turn is connected to a module (14), which triggers the disconnection of the transformer (1) by means of its contacts (15) when the signal for disconnecting the transformer (1) is present. .9. The protective device as claimed in one of claims 1-8, wherein the phase conductors (L1,L2,L3) and the neutral conductor (N) run through the circuit breaker (3), and the signal for disconnecting the transformer (1) is displayed optically on the circuit breaker (3). 10. The protective device as claimed in claim 9, wherein, during and/or after disconnection of the transformer (1), a feedback signal (18) is generated and is displayed optically on the circuit breaker (3). ABSTRACT TITLE: "A protective device for an electrical connection of a transformer" The invention relates to a protective device (2) having a circuit breaker (3), in particular a low-voltage circuit breaker, for an electrical connection of a transformer (1), in particular a medium-voltage transformer, to a load (V), the transformer (1) being operated on the secondary side in star-connected fashion, and the connection taking place via at least three phase conductors (L1,L2,L3) and a neutral conductor (N), an overcurrent device being arranged between the transformer (1) and the load (V), and between a first switching device (5,6) and having first magnetoelectric transducers (4) arranged on each phase conductor (L1,L2,L3) and the neutral conductor (N), which transducers (4) each emit a transducer current, the overcurrent device in each case establishing the presence of a first ground-fault current using the transducer currents, and the circuit breaker (3) having a switching device, which interrupts at least the phase conductors (L1,L2,L3) between the transformer (1) and the load (V) in the event of the presence of a first ground-fault current, in each case second magnetoelectric transducers (8) are provided simultaneously between the star connection and the overcurrent device on each phase conductor (L1,L2,L3), the neutral conductor (N) and a star-point conductor (9) connected at the star point, the star-point conductor (9) being connected to ground, in that in each case the presence of a second ground-fault current is determined using the transducer currents of the second transducers (8), and in that in the event of the presence of a second ground-fault current, a signal for disconnecting the transformer (1) is formed.

Full Text

Description
Protective device having a circuit breaker, in particular a
low-voltage circuit breaker
The invention relates to a protective device having a circuit
breaker, in particular a low-voltage circuit breaker, in
accordance with the preamble of claim 1.
It is known to provide low-voltage circuit breakers with
overcurrent releases, which can also include protection against
ground faults in addition to protection against overloads and
short circuits. The determination of the ground-fault current
can take place via the formation of the phasor sum of the phase
currents or else the ground-fault current flowing back towards
the feed is measured by means of a transducer. In this case,
however, only the ground-fault current flowing through the
circuit breaker (unrestricted earth fault) can be determined.
In installation applications, however, it may be necessary to
also determine a ground fault between the feed (medium-voltage
transformer) and the circuit breaker (restricted earth fault)
in addition to the ground-fault current flowing through the
low-voltage circuit breaker.
The object of the invention is to specify a protective device
having a circuit breaker which can also determine the ground-
fault current between the feed (transformer) and the circuit
breaker (restricted earth fault).
The object is achieved by the features of claim 1; the
dependent claims relate to advantageous configurations.

The solution envisages that in each case second magnetoelectric
transducers are provided simultaneously between the star
connection of the transformer and the overcurrent device on
each phase conductor, the neutral conductor and a star-point
conductor, which is connected to ground and is connected at the
star point, that in each case the presence of a second ground-
fault current is determined using the transducer currents of
the second transducers, and that, in the event of the presence
of a second ground-fault current, a signal for disconnecting
the transformer is formed. In the event of detection of a
ground-fault current, a message in the form of a signal is now
generated by the overcurrent device (by the "overcurrent
release"), and this message can be used to disconnect the
transformer or the feed. The monitoring of ground faults
between the transformer (the feed) and the circuit breaker can
in this case easily be integrated into the overcurrent device
of the circuit breaker as a side effect.
The safety of the protective device can be improved if, in the
event of the presence of a first and/or a second ground-fault
current, the value of said ground-fault current is determined
in each case, and if the interruption in the event of the
presence of a first ground-fault current or the disconnection
in the event of the presence of a second ground-fault current
only takes place if this value in each case exceeds a
predetermined limit value.
A simple protective device provides that the second transducers
are connected to one another in such a way that a residual
current is formed.
It is technically simple if the second transducers have coils
as the sensor elements.

In a simple embodiment, all of the coils of the second
transducers are connected in parallel.
Expediently, the determination of the ground-fault current in
each case takes place using the residual current or using the
phasor sum of the phase currents.
In an operation-friendly protective device, the signal for
disconnecting the transformer is displayed optically.
In terms of control technology it is simple if the signal for
disconnecting the transformer is output via a bus, which in
turn is connected to a relay module, which triggers the
disconnection of the transformer by means of its relay contacts
when the signal for disconnecting the transformer is present.
A compact configuration provides that the phase conductors and
the neutral conductor run through the circuit breaker, and the
signal for disconnecting the transformer is displayed optically
on the circuit breaker.
It is yet more operation-friendly if during and/or after
disconnection of the transformer, a feedback signal is
generated and is displayed optically on the circuit breaker.
The invention will be described in more detail below with
reference to a drawing. The single figure shows, in a schematic
illustration, a transformer 1 (in this case a medium-voltage
transformer), which is operated on the secondary side in star-
connected fashion and is connected to a load V via phase
conductors L1, L2, L3 and a neutral conductor N.

Furthermore, the figure shows a protective device 2, which
comprises a circuit breaker 3. The phase conductors L1, L2, L3
and the neutral conductor N are passed through the circuit
breaker 3. The circuit breaker 3 has an overcurrent protective
device, whose magnetoelectric transducers 4 are shown in figure
4. The transducers 4 are coils which comprise the associated
conductors L1, L2, L3, N in each case and act as sensor
elements for the currents flowing through the conductors L1,
L2, L3, N. All of the transducers 4 are electrically connected
to a central processor unit TU (Trip Unit), which has a
software-controlled processor (not illustrated). Each
transducer 4 emits a corresponding transducer current to the
processor unit TU, which establishes the presence of a ground-
fault current using the transducer currents in relation to the
figure below the circuit breaker 3 (first ground-fault current,
unrestricted earth fault). The determination of the ground-
fault current takes place in each case using the residual
current (or using the phasor sum) of the phase currents
detected via the transducers 4.
Furthermore, the circuit breaker has a switching device whose
tripping magnet 5 is illustrated in the figure. The tripping
magnet 5 actuates a switch with a plurality of switch contacts
6 in the event of the presence of a ground-fault current in
order to interrupt the phase conductors L1, L2, L3 between the
transformer 1 and the load V. As shown in the figure, in this
case the neutral conductor N is also interrupted. The
activation of the tripping magnet 5 takes place by means of a
tripping signal emitted by the processor unit (TU), which is
illustrated schematically here as arrow 7.
The protective device also includes further magnetoelectric
transducers 8, which are illustrated above the circuit breaker
3 in the figure and, similarly to the transducers 4, surround

the associated conductors L1, L2, L3, N and in addition here
the star-point conductor 9, which is connected to the star
point of the star connection and to ground 10, the element 11
in the figure schematically illustrating a releasable
connection to ground 10. The transducers 8 are in the form of
coils, which are all connected in parallel. The interconnection
makes it possible to form a corresponding residual current and
to determine the occurrence of a ground-fault current using the
residual current. (Of course the ground-fault current could
also be determined using the phasor sum of the phase currents).
The figure shows that the interconnected transducers 8 are
connected to the processor unit TU. In order to evaluate the
transducer currents, in this case the same algorithm is used as
for the transducer currents of the transducers 4.
If the presence of a ground-fault current (second ground-fault
current, restricted earth fault) is determined using the
transducer currents of the transducers 8, the processor unit TU
generates a signal for disconnecting the transformer 1, which
signal is output via a bus 12. At the same time, the signal is
displayed via an optical display 13 on the circuit breaker 3.
The bus 12 is connected to a module 14, which, when the signal
for disconnecting the transformer 1 is output, triggers the
disconnection of the transformer 1 via the switching unit 16 by
means of its contacts 15 (connecting line 17) , in which case
the module 14 may also be a relay module with its relay
contacts. After disconnection of the transformer 1, the unit 16
generates a feedback signal, which is fed back to the circuit
breaker 3 (connecting line 18). Using this fed-back signal, a
further tripping magnet 19 is switched, which tripping magnet
opens the switch contacts 6,

to be precise independently of the tripping magnet 5. In this
case, a microswitch 20 is opened, with the result that the
disconnection of the transformer and the position of the switch
contacts 6 can be interrogated. This can also be displayed
optically on the circuit breaker 3.
The interruption or the disconnection in the event of the
presence of a ground-fault current only takes place if this
value in each case exceeds a predetermined limit value.
The protective function for this ground-fault current
(restricted earth fault) can likewise be parameterized with
respect to the response values and the delay times in the
overcurrent device, using the interfaces of the circuit breaker
3. This can also take place via the bus 12, via which remote
diagnosis is also possible.

We Claim:
1. A protective device (2) having a circuit breaker (3), in particular a low-
voltage circuit breaker, for an electrical connection of a transformer (1), in
particular a medium-voltage transformer, to a load (V), the transformer
(1) being operated on the secondary side in star-connected fashion, and
the connection taking place via at least three phase conductors (L1,L2,L3)
and a neutral conductor (N),
an overcurrent device being arranged between the transformer (1) and the
load (V), and between a first switching device (5,6) and having first
magnetoelectric transducers (4) arranged on each phase conductor
(L1,L2,L3) and the neutral conductor (N), which transducers (4) each emit a
transducer current, the overcurrent device in each case establishing the
presence of a first ground-fault current using the transducer currents, and
the circuit breaker (3) having a switching device, which interrupts at least the
phase conductors (L1,L2,L3) between the transformer (1) and the load (V) in
the event of the presence of a first ground-fault current,
characterized
in that in each case second magnetoelectric transducers (8) are provided
simultaneously between the star connection and the overcurrent device on
each phase conductor (L1,L2,L3), the neutral conductor (N) and a star-point
conductor (9) connected at the star point, the star-point conductor (9) being
connected to ground,
in that in each case the presence of a second ground-fault current is
determined using the transducer currents of the second transducers (8), and
in that in the event of the presence of a second ground-fault current, a signal
for disconnecting the transformer (1) is formed.

2. The protective device as claimed in claim 1, wherein in the event of the
presence of a first and/or a second ground-fault current, the value of said
ground-fault current is determined in each case, and in that the
interruption in the event of the presence of a first ground-fault current or
the disconnection in the event of the presence of a second ground-fault
current only takes place if this value in each case exceeds a
predetermined limit value.
3. The protective device as claimed in claim 1 or 2, wherein the second
transducers (8) are connected to one another in such a way that a
residual current is formed.
4. The protective device as claimed in one of claims 1-3, wherein the second
transducers (8) have coils as the sensor elements.
5. The protective device as claimed in claim 4, wherein all of the coils of the
second transducers (8) are connected in parallel.
6. The protective device as claimed in one of claims 1-5, wherein the
determination of the ground-fault current in each case takes place using
the residual current or using the phasor sum of the phase currents.
7. The protective device as claimed in one of claims 1-6, wherein the signal
for disconnecting the transformer (1) is displayed optically.

8. The protective device as claimed in one of claims 1-7, wherein the signal
for disconnecting the transformer (1) is output via a bust (12), which in
turn is connected to a module (14), which triggers the disconnection of
the transformer (1) by means of its contacts (15) when the signal for
disconnecting the transformer (1) is present.
.9. The protective device as claimed in one of claims 1-8, wherein the phase
conductors (L1,L2,L3) and the neutral conductor (N) run through the
circuit breaker (3), and the signal for disconnecting the transformer (1) is
displayed optically on the circuit breaker (3).
10. The protective device as claimed in claim 9, wherein, during and/or after
disconnection of the transformer (1), a feedback signal (18) is generated
and is displayed optically on the circuit breaker (3).

ABSTRACT

TITLE: "A protective device for an electrical connection of a transformer"
The invention relates to a protective device (2) having a circuit breaker (3), in
particular a low-voltage circuit breaker, for an electrical connection of a
transformer (1), in particular a medium-voltage transformer, to a load (V), the
transformer (1) being operated on the secondary side in star-connected fashion,
and the connection taking place via at least three phase conductors (L1,L2,L3)
and a neutral conductor (N), an overcurrent device being arranged between the
transformer (1) and the load (V), and between a first switching device (5,6) and
having first magnetoelectric transducers (4) arranged on each phase conductor
(L1,L2,L3) and the neutral conductor (N), which transducers (4) each emit a
transducer current, the overcurrent device in each case establishing the presence
of a first ground-fault current using the transducer currents, and the circuit
breaker (3) having a switching device, which interrupts at least the phase
conductors (L1,L2,L3) between the transformer (1) and the load (V) in the event
of the presence of a first ground-fault current, in each case second
magnetoelectric transducers (8) are provided simultaneously between the star
connection and the overcurrent device on each phase conductor (L1,L2,L3), the
neutral conductor (N) and a star-point conductor (9) connected at the star point,
the star-point conductor (9) being connected to ground, in that in each case the
presence of a second ground-fault current is determined using the transducer
currents of the second transducers (8), and in that in the event of the presence
of a second ground-fault current, a signal for disconnecting the transformer (1)
is formed.

Documents:

02950-kolnp-2008-abstract.pdf

02950-kolnp-2008-claims.pdf

02950-kolnp-2008-correspondence others.pdf

02950-kolnp-2008-description complete.pdf

02950-kolnp-2008-drawings.pdf

02950-kolnp-2008-form 1.pdf

02950-kolnp-2008-form 2.pdf

02950-kolnp-2008-form 3.pdf

02950-kolnp-2008-form 5.pdf

02950-kolnp-2008-international publication.pdf

02950-kolnp-2008-international search report.pdf

02950-kolnp-2008-others pct form.pdf

02950-kolnp-2008-pct priority document notification.pdf

02950-kolnp-2008-pct request form.pdf

02950-kolnp-2008-translated copy of priority document.pdf

2950-KOLNP-2008-(16-09-2013)-ABSTRACT.pdf

2950-KOLNP-2008-(16-09-2013)-ANNEXURE TO FORM 3.pdf

2950-KOLNP-2008-(16-09-2013)-CLAIMS.pdf

2950-KOLNP-2008-(16-09-2013)-CORRESPONDENCE.pdf

2950-KOLNP-2008-(16-09-2013)-FORM-1.pdf

2950-KOLNP-2008-(16-09-2013)-FORM-2.pdf

2950-KOLNP-2008-(16-09-2013)-OTHERS.pdf

2950-KOLNP-2008-(18-09-2013)-PETITION UNDER RULE 137.pdf

2950-KOLNP-2008-CORRESPONDENCE 1.1.pdf

2950-KOLNP-2008-CORRESPONDENCE.pdf

2950-KOLNP-2008-EXAMINATION REPORT.pdf

2950-KOLNP-2008-FORM 18-1.1.pdf

2950-kolnp-2008-form-18.pdf

2950-KOLNP-2008-GPA.pdf

2950-KOLNP-2008-GRANTED-ABSTRACT.pdf

2950-KOLNP-2008-GRANTED-CLAIMS.pdf

2950-KOLNP-2008-GRANTED-DESCRIPTION (COMPLETE).pdf

2950-KOLNP-2008-GRANTED-DRAWINGS.pdf

2950-KOLNP-2008-GRANTED-FORM 1.pdf

2950-KOLNP-2008-GRANTED-FORM 2.pdf

2950-KOLNP-2008-GRANTED-FORM 3.pdf

2950-KOLNP-2008-GRANTED-FORM 5.pdf

2950-KOLNP-2008-GRANTED-SPECIFICATION-COMPLETE.pdf

2950-KOLNP-2008-INTERNATIONAL PUBLICATION.pdf

2950-KOLNP-2008-INTERNATIONAL SEARCH REPORT & OTHERS.pdf

2950-KOLNP-2008-OTHERS-1.1.pdf

2950-KOLNP-2008-OTHERS.pdf

2950-KOLNP-2008-PETITION UNDER RULE 137.pdf

2950-KOLNP-2008-REPLY TO EXAMINATION REPORT.pdf

2950-KOLNP-2008-TRANSLATED COPY OF PRIORITY DOCUMENT.pdf

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Patent Number

258880

Indian Patent Application Number

2950/KOLNP/2008

PG Journal Number

07/2014

Publication Date

14-Feb-2014

Grant Date

12-Feb-2014

Date of Filing

21-Jul-2008

Name of Patentee

SIEMENS AKTIENGESELLSCHAFT

Applicant Address

WITTELSBACHERPLATZ 2, 80333 MUNCHEN

Inventors:

#	Inventor's Name	Inventor's Address
1	HENRY FRANK	HASSFURTER WEG 7, 13189 BERLIN
2	ILKA REDMANN	KIRCHSTR. 8, 14612 FALKENSEE
3	JEFFERY C. MIZENER	801 TRAIL LAKE DR., 76039 TEXAS/EULESS

PCT International Classification Number

H02H 3/16,H02H 7/04

PCT International Application Number

PCT/EP2006/070218

PCT International Filing date

2006-12-27

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	10 2006 004 800.8	2006-01-23	Germany