AU2015221437B2 - Excess voltage protection apparatus - Google Patents
Excess voltage protection apparatus Download PDFInfo
- Publication number
- AU2015221437B2 AU2015221437B2 AU2015221437A AU2015221437A AU2015221437B2 AU 2015221437 B2 AU2015221437 B2 AU 2015221437B2 AU 2015221437 A AU2015221437 A AU 2015221437A AU 2015221437 A AU2015221437 A AU 2015221437A AU 2015221437 B2 AU2015221437 B2 AU 2015221437B2
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- AU
- Australia
- Prior art keywords
- excess voltage
- voltage protection
- protection apparatus
- discharge
- series terminals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/06—Mounting arrangements for a plurality of overvoltage arresters
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- Emergency Protection Circuit Devices (AREA)
Abstract
An excess voltage protection apparatus (9), in particular for
a technical signalling device, for arrangement between an
external installation (2) and an internal installation (1),
having at least two series terminals (10a, 10b) which are
each part of a signal path (12a, 12b), the series terminals
(10a, 10b) having connection contacts (13a, 13b, 14a, 14b)
for connection to the internal and external installation (1,
2), having a base terminal (11) having a connection for a
discharge to earth, and at least one excess voltage
protection device (17) which is electrically connected to the
series terminals,
is characterised in that there is provided a connector
housing (23) in which the excess voltage protection device
(17) is installed,
in that the series terminals (10a, 10b) and the base terminal
(11) each have an insertion location (16) for fitting the
connector housing (23) of the excess voltage protection
device (17) and in that the series terminals (10a, 10b) each
have a non-releasable isolating blade (19a, 19b) for
temporary separation of the signal paths (12a, 12b). A space
saving excess voltage protection apparatus which is simple to
operate and has a low failure rate is thereby produced.
Fig. 2
2/3
14a 24 16 19a 24 13a10a
14b 19O1b
12a
2
~- ~'13b
12b
15
-23
917
Fi g. 2
Description
2/3
14a 24 16 19a 24 13a10a 19O1b 12a 14b 2 ~- ~'13b 12b
-23
917
Fi g. 2
The invention relates to an excess voltage protection
apparatus for signal and control lines, in particular for a
technical signalling device.
Some excess voltage protection apparatus for technical
signalling devices have an arrangement between an external
installation and an internal installation, having at least
two series terminals which are each part of a signal path,
the series terminals having connection contacts for
connection to the internal and external installation, having
a base terminal having a connection for a discharge to earth,
and at least one excess voltage protection device which is
electrically connected to the series terminals, wherein there
is provided a connector housing in which the excess voltage
protection device is installed.
Technical railway installations comprise a large number of
power-operated elements of external installations, for
example, rail signals or points, which are connected by means
of lines (signal paths) to an internal installation (for
example, a signal box or the electronic control system of the
signal box). Although the members of the external
installations are generally earthed, as a result, for example,
of inductive coupling or potential differences resulting from
resistance areas brought about, for example, by means of a
remote lightning strike, there may occur an introduction of
excess voltage in the control and switching elements (for
example, the signal box internal installation) which may lead
to damage and operational failures.
In order to prevent damage and malfunctions in signal boxes,
additional excess voltage protection apparatuses may be used.
The action of the excess voltage protection is based on the
discharge to earth of any excess voltages which occur.
Excess voltage protection devices may be mounted on bases
which are connected by means of cable connections to
isolating blade series terminals, as produced, for example,
by Thales Deutschland GmbH using PLUGTRAB elements from
Phoenix Contact.
A disadvantage of this arrangement is that the excess voltage
protection apparatus in addition to the isolating blade
series terminal takes up a large amount of space and the
discharge is carried out over a relatively long path, which
is linked to high levels of discharge inductivity so that,
during the discharge operation, large interference fields are
induced and a higher voltage is present at the discharge to
earth in the event of an occurrence of an excess voltage.
In addition, it is not possible to identify thermal overloads
of the excess voltage protection devices.
It is desired to address or ameliorate one or more
disadvantages or drawbacks of the prior art, or at least
provide a useful alternative.
In at least one embodiment, the present invention provides an
excess voltage protection apparatus for signal and control
lines, in particular for a technical signalling device, for arrangement between an external installation and an internal installation, having: at least two series terminals which are each part of a signal path, the series terminals having connection contacts for connection to the internal and external installation, having a base terminal having a connection for a discharge to earth, and at least one excess voltage protection device which is electrically connected to the series terminals, characterised in that there is provided a connector housing in which the excess voltage protection device is installed, in that the series terminals and the base terminal each have an insertion location for fitting the connector housing of the excess voltage protection device and in that the series terminals each have a non-releasable isolating blade for temporary separation of the signal paths.
Preferred embodiments of the present invention are
hereinafter described, by way of example only, with reference
to the accompanying drawings, in which:
Figure 1 shows a technical rail installation which is
protected by means of an excess voltage protection apparatus
according to the invention;
Figure 2 shows the structure of an excess voltage protection
apparatus according to the invention;
Figure 3 is a perspective view of an excess voltage
protection apparatus according to the invention; and
Figure 4 shows an excess voltage protection device of an
excess voltage protection apparatus according to the
invention.
According to embodiments of the invention, the series
terminals and the base terminal each have an insertion
location for fitting the connector housing of the excess
voltage protection device, wherein the series terminals each
have a non-releasable isolating blade (which is, for example,
pivotable) for temporary separation of the signal paths.
Whilst, in the prior art, the excess voltage protection
device is fitted on a separate base, and is connected to the
isolating blade series terminal by means of cables, in the
excess voltage protection apparatus according to embodiments
of the invention the isolating blade series terminals (series
terminals with isolating blades) are provided with an
insertion location, at which the excess voltage protection
device can be fitted. According to embodiments of the
invention, therefore, the excess voltage protection is
produced by means of direct fitting of the excess voltage
protection devices to the isolating blade series terminals
and the base terminals. In this instance, the connections for
individual strands of the technical signalling device are
connected to the series terminals and the earth connections
are connected to the base terminals. The base terminals are
preferably provided with discharge feet which enable a gas
tight contact and current-carrying contact to an assembly
rail, for example, a DIN rail assembly rail TS 35, on which
the series terminals can be assembled.
In the excess voltage protection apparatus according to at
least some embodiments of the invention, therefore, isolating
blade series terminals are used as a connection member, for
example, between the internal and external installation
cabling. The series terminals which are intended to be used
for the excess voltage protection apparatus according to some
embodiments of the invention therefore have to be sized in
such a manner that the excess voltage protection device can
be fitted without concealing the connection contacts for
connection to the internal and external installation.
Furthermore, the connector housing and the insertion location
have to be configured in such a manner that the excess
voltage protection devices can be connected in an impact and
vibration-resistant manner in accordance with EN 50125-3;
this is particularly the case for the region defined in
accordance with EN 50125-3 outside the tracks (spacing of
from 1 to 3 m from the track).
The connection contacts of the series terminals are
connections for individual strands. At the side of the
external installation, although cables having many wires can
be used, they are then connected as individual strands. The
concept according to at least some embodiments of the
invention takes into account that strands of different
current circuits can be connected to the same excess voltage
protection device. This is particularly important for
technical signalling installations since, as a result of this
particular property, the absence of feedback to the safety
related elements of the technical signalling system is
maintained.
For the use of the excess voltage protection apparatus
according to at least some embodiments of the invention in technical signalling devices for rail operation, the installation components used (series terminal, base terminal) and the excess voltage protection devices have to be permitted for use in installations of control and safety technology.
With the excess voltage protection apparatus according to at
least some embodiments of the invention, it is possible to
prevent damage and malfunctions in signal boxes which may
occur, for example, as a result of excess voltages in the
cabling systems to the external installations, caused by
remote lightning strikes. At the same time, the excess
voltage protection apparatus according to at least some
embodiments of the invention can be assembled in a space
saving manner. It is also advantageous that, as a result of
the plug type connection according to at least some
embodiments of the invention between the series terminal and
the excess voltage protection device, the discharge and the
signal transmission are carried out at the same location,
that is to say, without any line connection between the
series and base terminal and excess voltage protection device,
so that the excess voltage to be discharged can be discharged
to earth with the lowest possible level of discharge
inductivity. As a result of the short discharge paths, there
are produced smaller influences on surrounding components in
particular as a result of magnetic fields.
The excess voltage protection apparatus according to at least
some embodiments of the invention can also be used in
installations other than technical rail installations, in
particular in installations which are not earthed, since the
excess voltage protection apparatus according to such
embodiments is constructed in an insulated manner, and the active components contained cannot be touched. Preferably, the excess voltage protection apparatus according to at least some embodiments of the invention corresponds at least to the requirements for the protection type IP 20. The excess voltage protection apparatus according to at least some embodiments of the invention is also particularly suitable for protection for electric circuits in which the absence of feedback is a strict requirement for operation.
The excess voltage protection apparatus according to at least
some embodiments of the invention enables installation of
different excess voltage protection devices at difference
times. It is thereby possible to pre-install series and base
terminals so that the installation can also be operated
initially without excess voltage protection and a subsequent
retrofitting is possible.
Embodiments of the invention
The series terminals preferably each have on the connections
for the input and output lines a test socket for contacting
with respect to the signal path, in particular for measuring
and testing purposes. The test sockets are preferably
provided at both sides (at the internal and external
installation), for example, for permanent contacting of a
measurement device.
In a preferred embodiment, there are provided a plurality of
excess voltage protection devices which each have a connector
housing and the arrangement of the series terminals has a
plurality of insertion locations for fitting the connector
housings to the excess voltage protection devices.
Consequently, a plurality of field elements can be protected with the excess voltage protection apparatus according to the invention.
Preferably, the excess voltage protection device comprises at
least two discharge paths, wherein each discharge path
comprises a series arrangement of an excess voltage discharge
and a varistor. The invention thus provides independent
discharge elements. For example, a gas discharge may be used
as an excess voltage discharge. Using the combination of
varistor and excess voltage discharge, it can be ensured that
there are no occurrences of feedback in respect of the
technical signalling devices during operation. Furthermore,
during control operation, the ageing of the structural
elements is minimised by the prevention of leakage currents.
In particular, signal circuits and inputs/outputs which guide
AC or DC voltages can be protected. The combination of
varistor and excess voltage discharge in a series arrangement
ensures that secondary current is prevented.
In a particularly preferred embodiment of the excess voltage
protection apparatus according to the invention, a barrier
device is arranged between the discharge paths. The barrier
device is intended to prevent the discharge paths from being
able to touch, and thus brings about a non-releasable
separation between both discharge paths. It is thereby
possible to connect different circuits to one excess voltage
protection device, wherein the absence of feedback to the
operation and the technical signalling safety of the
installation are ensured and, at the same time, the spacing
between the discharge paths can be kept small. The barrier
device prevents the unintentional contact of the components
of the discharge paths and is preferably constructed in the
form of an insulation plate from a suitable electrically insulating material. Preferably, the dielectric strength of the barrier device is > 10 kV/mm after ageing. The voltage resistance required according to EN 50124-1 between two redirection paths is ensured by means of appropriate sizing of the air gaps and creep paths. As a result of the provision of the barrier device, a plurality of field elements may be connected by means of the same excess voltage protection device. This is particularly advantageous when triple-wire field elements (for example, a dual filament lamp) are intended to be connected to excess voltage protection devices which each have two discharge paths since the remaining discharge path does not then have to remain free as is the case with the excess voltage protection apparatus known from the prior art, but instead can be used for another field element. Furthermore, the planning and testing complexity can be reduced.
Preferably, the connector housing is constructed to be at
least partially transparent, in particular in the region of
the varistor. In this manner, the excess voltage protection
devices can be monitored by means of visual examination.
Thermal overloads can be identified.
In an advantageous embodiment, a monitoring device, in
particular an optical detection device, is provided within
the excess voltage protection apparatus in order to detect
occurrences of excess voltage. The monitoring by means of the
monitoring device enables selective maintenance and thereby
improves the availability of the device. Preferably, the
excess voltage protection apparatus can be monitored remotely.
The monitoring device may be provided with a store which can
store a plurality of occurrences of excess voltage discharge.
A separate monitoring device may also be provided for each excess voltage protection device. Monitoring of the excess voltage protection devices is particularly advantageous for decentralised technical signalling devices.
Other advantages of the invention will be appreciated from
the description and the drawings. The features mentioned
above and those set out below may also be used according to
the invention individually per se or together in any
combination. The embodiments shown and described are not
intended to be understood to be a conclusive listing but are
instead of exemplary character for describing the invention.
Figure 1 shows a technical rail installation having a signal
box 1 (internal installation) and a rail signal 2 (external
installation) which is controlled by means of an electronic
control system 3 of the signal box 1. The signal box 1 is
provided with an external lightning protector 4 which is
earthed by means of a foundation ring earth electrode 5. A
main potential equalisation unit 6 and internal excess
voltage protection apparatuses 7 serve to protect the signal
box 1 from direct lightning strike.
In order to prevent the introduction of an excess voltage
into the electronic control system 3 via components of the
external installation 2 (for example, by means of remote
lightning strike in the vicinity of the signal 2 or in the
vicinity of the lines 8 between the signal 3 and signal box
1), the signal box 1 is provided with an additional excess
voltage protection apparatus 9 according to the present
invention.
Figure 2 shows the structure of the excess voltage protection
apparatus 9 according to the invention. Two series terminals
10a, 10b and a base terminal 11 are used to connect the
external installation 2 to the internal installation 1, the
series terminals 10a, 10b each forming a portion of a signal
path 12a, 12b. The terminals (10a, 10b, 11) are arranged in
any sequence. The series terminals 10a, 10b are provided with
connection contacts 13a, 13b, 14a, 14b (individual strand
connectors) for connection to the internal or external
installation 1, 2. For earth discharge, the base terminal 11
has a discharge foot 15.
An excess voltage protection device 17 is connected to the
series terminals 10a, 10b and the base terminal 11 by means
of plug type contacts. To this end, the terminals 10a, 10b,
11 have insertion locations 16. The excess voltage protection
device 17 is arranged in a connector housing 23, which is
fitted by means of the insertion locations 16 onto the
terminals 10a, 10b, 11 and can consequently be electrically
and mechanically contacted therewith. By means of the excess
voltage protection device, each signal path 12a, 12b is
connected to earth. The series terminals 10a, 10b each have a
preferably pivotable isolating blade 19a, 19b for temporarily
separating the signal paths.
Close to the connection contacts 13a, 13b, 14a, 14b for the
input and output lines, there are provided test sockets 24 by
means of which a test device or measurement device can be
contacted with the signal paths 12a, 12b.
Figure 3 is a perspective view of an excess voltage
protection apparatus 9 according to the invention with two
fitted excess voltage protection devices 17. The excess
voltage protection apparatus 9 according to the invention may
comprise a large number of excess voltage protection devices
17. The excess voltage protection devices 17 are arranged on
an assembly rail 22 which, in particular when used in non
earthed regions, is in turn fitted on an insulating base
plate (conductor guiding plate - not shown). The earth
contact can be produced via the assembly rail 22. In order to
display discharge events, a display module may, for example,
be provided at the lower end of the assembly rail.
The basic structure of the excess voltage protection device
17 is shown in Figure 4. The excess voltage protection device
17 comprises two discharge paths 18a, 18b which can be
connected to the signal paths 12a, 12b by means of
connections 21a, 21b. The two connections 21a, 21b have a
spacing di with respect to each other, the spacing di
designating the creep path and air gap which has to be
complied with between the connections 21a, 21b of the two
discharge paths 18a, 18b of the excess voltage protection
device 17. In the discharge paths 18a, 18b, an excess voltage
discharge 19 and a varistor 20 are connected in series,
respectively. The varistor 19 and the excess voltage
discharge 20 may be arranged in any sequence, but they are
always in series. Between the two discharge paths 18a, 18b, a
barrier device 21 is arranged so that the discharge paths 18a,
18b are electrically insulated from each other.
The excess voltage protection apparatus according to the
invention makes provision for the excess voltage protection
devices to be fitted directly on an isolating blade series
terminal, whereby a space-saving excess voltage protection
apparatus is produced which is simple to operate and has a
low failure rate.
Throughout this specification and the claims which follow,
unless the context requires otherwise, the word "comprise",
and variations such as "comprises" and "comprising", will
be understood to imply the inclusion of a stated integer or
step or group of integers or steps but not the exclusion of
any other integer or step or group of integers or steps.
The reference in this specification to any prior publication
(or information derived from it), or to any matter which is
known, is not, and should not be taken as an acknowledgment
or admission or any form of suggestion that that prior
publication (or information derived from it) or known matter
forms part of the common general knowledge in the field of
endeavour to which this specification relates.
The reference numerals in the following claims do not in any
way limit the scope of the respective claims.
List of reference numerals
1 Signal box/internal installation 2 Rail signal/external installation 3 Electronic control system 4 External lightning protector Foundation ring earth electrode 6 Main potential equalisation unit 7 Internal excess voltage protection apparatuses 8 Lines 9 Excess voltage protection apparatuses 10a, 10b Series terminals 11 Base terminal 12a, 12b Signal path 13a, 13b Connection contacts to the external installation 14a, 14b Connection contacts to the internal installation Discharge foot 16 Insertion locations 17 Excess voltage protection device 18 Connector housing 19 Excess voltage discharge Varistor 21 Barrier device 22 Assembly rail 23 Connector housing 24 Test socket
Claims (7)
1. Excess voltage protection apparatus for signal and control
lines, in particular for a technical signalling device, for
arrangement between an external installation and an internal
installation, having:
at least two series terminals which are each part of a signal
path, the series terminals having connection contacts for
connection to the internal and external installation,
having a base terminal having a connection for a discharge to
earth, and
at least one excess voltage protection device which is
electrically connected to the series terminals,
characterised in that
there is provided a connector housing in which the excess
voltage protection device is installed,
in that the series terminals and the base terminal each have
an insertion location for fitting the connector housing of
the excess voltage protection device and
in that the series terminals each have a non-releasable
isolating blade for temporary separation of the signal paths.
2. Excess voltage protection apparatus according to claim 1,
characterised in that the series terminals each have on the
connections for the input and output lines a test socket for
contacting with respect to the signal paths.
3. Excess voltage protection apparatus according to either of
the preceding claims, characterised in that there are
provided a plurality of excess voltage protection devices
which each have a connector housing, and in that the
arrangement of the series terminals has a plurality of insertion locations for fitting the connector housings to the excess voltage protection devices.
4. Excess voltage protection apparatus according to any one
of the preceding claims, characterised in that the excess
voltage protection device comprises at least two discharge
paths, wherein each discharge path comprises a series
arrangement of an excess voltage discharge and a varistor.
5. Excess voltage protection apparatus according to claim 4,
characterised in that a barrier device is arranged between
the discharge paths.
6. Excess voltage protection apparatus according to any one
of the preceding claims, characterised in that the connector
housing is constructed to be at least partially transparent,
in particular in the region of the varistor.
7. Excess voltage protection apparatus according to any one
of the preceding claims, characterised in that a monitoring
device, in particular an optical detection device, is
provided within the excess voltage protection apparatus in
order to detect occurrences of excess voltage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014217446.5 | 2014-09-01 | ||
| DE102014217446.5A DE102014217446B4 (en) | 2014-09-01 | 2014-09-01 | Overvoltage protection device and use thereof in signaling equipment in railway operation. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2015221437A1 AU2015221437A1 (en) | 2016-03-17 |
| AU2015221437B2 true AU2015221437B2 (en) | 2020-02-06 |
Family
ID=53969233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2015221437A Active AU2015221437B2 (en) | 2014-09-01 | 2015-08-31 | Excess voltage protection apparatus |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP2991177B1 (en) |
| AU (1) | AU2015221437B2 (en) |
| DE (1) | DE102014217446B4 (en) |
| DK (1) | DK2991177T3 (en) |
| ES (1) | ES2810758T3 (en) |
| HR (1) | HRP20201168T1 (en) |
| PL (1) | PL2991177T3 (en) |
| PT (1) | PT2991177T (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018201333A1 (en) | 2018-01-29 | 2019-08-01 | Phoenix Contact Gmbh & Co. Kg | Surge Protection Ensemble |
| DE202018100482U1 (en) | 2018-01-29 | 2018-03-09 | Phoenix Contact Gmbh & Co. Kg | Surge Protection Ensemble |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202011002019U1 (en) * | 2010-12-17 | 2011-04-07 | Dehn + Söhne Gmbh + Co. Kg | Arrangement for opening a line connection |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3831935A1 (en) * | 1988-09-20 | 1990-03-29 | Dehn & Soehne | Overvoltage protection |
| DE19545505C1 (en) * | 1995-12-06 | 1997-05-28 | Dehn & Soehne | Surge arrester for low-voltage, high power fuse |
| DE19856939A1 (en) * | 1998-12-10 | 2000-06-15 | Bettermann Obo Gmbh & Co Kg | Circuit arrangement for protecting electrical installations against overvoltage events |
| DE102010012684A1 (en) * | 2010-03-24 | 2011-09-29 | Phoenix Contact Gmbh & Co. Kg | Surge protection device |
| EP2622688A2 (en) * | 2010-09-30 | 2013-08-07 | Phoenix Contact Development & Manufacturing, Inc. | Terminal block for surge protection having integral disconnect |
-
2014
- 2014-09-01 DE DE102014217446.5A patent/DE102014217446B4/en not_active Withdrawn - After Issue
-
2015
- 2015-08-21 PL PL15181971T patent/PL2991177T3/en unknown
- 2015-08-21 PT PT151819711T patent/PT2991177T/en unknown
- 2015-08-21 EP EP15181971.1A patent/EP2991177B1/en active Active
- 2015-08-21 ES ES15181971T patent/ES2810758T3/en active Active
- 2015-08-21 DK DK15181971.1T patent/DK2991177T3/en active
- 2015-08-31 AU AU2015221437A patent/AU2015221437B2/en active Active
-
2020
- 2020-07-27 HR HRP20201168TT patent/HRP20201168T1/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202011002019U1 (en) * | 2010-12-17 | 2011-04-07 | Dehn + Söhne Gmbh + Co. Kg | Arrangement for opening a line connection |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102014217446B4 (en) | 2016-07-07 |
| PT2991177T (en) | 2020-08-20 |
| DE102014217446A1 (en) | 2016-03-03 |
| DK2991177T3 (en) | 2020-08-10 |
| EP2991177B1 (en) | 2020-05-13 |
| HRP20201168T1 (en) | 2021-02-05 |
| PL2991177T3 (en) | 2021-01-11 |
| ES2810758T3 (en) | 2021-03-09 |
| EP2991177A1 (en) | 2016-03-02 |
| AU2015221437A1 (en) | 2016-03-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| HB | Alteration of name in register |
Owner name: THALES MANAGEMENT & SERVICES DEUTSCHLAND GMBH Free format text: FORMER NAME(S): THALES DEUTSCHLAND GMBH |
|
| FGA | Letters patent sealed or granted (standard patent) |