EP2725588A1 - Overvoltage protection module - Google Patents

Overvoltage protection module Download PDF

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Publication number
EP2725588A1
EP2725588A1 EP12468006.7A EP12468006A EP2725588A1 EP 2725588 A1 EP2725588 A1 EP 2725588A1 EP 12468006 A EP12468006 A EP 12468006A EP 2725588 A1 EP2725588 A1 EP 2725588A1
Authority
EP
European Patent Office
Prior art keywords
piston
plate
varistor
drilled holes
housing
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.)
Granted
Application number
EP12468006.7A
Other languages
German (de)
French (fr)
Other versions
EP2725588B1 (en
Inventor
Nejc Boskovic
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Razvojni Center Enem Novi Materiali doo
Original Assignee
Razvojni Center Enem Novi Materiali doo
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Razvojni Center Enem Novi Materiali doo filed Critical Razvojni Center Enem Novi Materiali doo
Priority to SI201230568A priority Critical patent/SI2725588T1/en
Priority to RS20160361A priority patent/RS54797B1/en
Publication of EP2725588A1 publication Critical patent/EP2725588A1/en
Application granted granted Critical
Publication of EP2725588B1 publication Critical patent/EP2725588B1/en
Priority to HRP20160582TT priority patent/HRP20160582T1/en
Priority to CY20161100482T priority patent/CY1117597T1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/767—Normally open

Definitions

  • the invention belongs to the field of devices for energy overvoltage protection, more precisely to the field of modules provided with a varistor and a system for triggering short circuit upon occurrence of overvoltage in a network.
  • the technical problem solved by the present invention is a constructional solution to a reliable and rapid operation of an overvoltage protection module with a varistor that creates short circuit by overheating a triggering element.
  • an overvoltage protection module with a varistor that creates short circuit by overheating a triggering element.
  • EP 1 798 742 A1 discloses an overvoltage protection element including a wafer of a varistor and a meltable member bridging the wafer of the varistor in case of thermal overload.
  • the solution is based on a solder arranged around an internal piston that gets heated in case of thermal overload of the varistor, the solder melts and flows from the piston to the bottom of a housing thus creating short circuit between the housing and the internal piston, which functions as a short-circuit bridge.
  • This solution is closest to the solution of the invention in that the heating of the varistor in the solution from EP 1 798 742 A1 causes short circuit between the internal piston and the bottom of the module, whereas, according to the present invention, two blocking elements from a meltable material start melting, which releases a spring that pushes a plate against a wall of the housing thus causing short circuit.
  • the essence of the overvoltage protection module of the invention lies in a constructional shape of a section causing short circuit when a varistor gets heated due to the presence of overvoltage overload.
  • An overvoltage protection module consists of a housing 1 shaped like a hollow cuboid with a cylindrical threaded pin 1a.
  • the bottom of the housing 1 is provided with a varistor 2, above which there is a piston 3 with drilled holes 3a and 3b on both parallel sides, between which a movable side wall shaped like a plate 4 is arranged.
  • the movable side wall 4 is provided at its upper edge with drilled holes 4a and 4b and at its side edge with two holes 4c.
  • the internal side of the plate 4 is provided with a holder of a spring 5 compressed in a way that the external part of the plate 4 is level with the external edges of the piston 3.
  • a meltable material is poured or inserted into said drilled holes 3a and 3b and the parallel drilled holes 4a and 4b.
  • a plate 7, onto which a flexible wire 6 is fastened, is fastened with screws 7a and 7b in the drilled holes 4a and 4b.
  • the piston 3 is closed by a piston 8 having a cylindrical pin 8a that simultaneously also functions as a second connection pin.
  • the cylindrical pin 8a of the piston 8 is provided with a rectangular insulation body 9 with one cut-out wall that allows the plate 4 to come in contact with the wall of the housing 1 in case of overvoltage on the varistor 2.
  • the body 9 together with the varistor 2, the piston 3 with the plate 4, the wire 6 on the plate 7 and with the piston 8 assembly are pushed towards the bottom of the housing 1 by a spring 10 that is compressed by a cover 11 with a round hole 11a for the pin 8a.
  • the piston 3 is provided with several drilled holes on two parallel side walls and with one or several drilled holes on the bottom section of the piston 3.
  • the movable side wall 4 on the upper edge is provided with two or several drilled holes and with two or several holes on side edges and/or a hole in the bottom side.
  • the varistor 2 gets heated, consequently the piston 3 and the material in the neighbouring drilled holes 3a and 4a and the drilled holes 3b and 4b get heated as well.
  • the softened material in the neighbouring drilled holes 3a and 4b and in the drilled holes 3b and 4b can no longer withstand the force of the pre-stressed spring 5, which causes the pre-stressed spring 5 to release and push the short-circuit plate 4 into the wall of the housing 1.
  • the short-circuit plate 4 is linked to the piston 3 with a flexible wire 6, through which current flows to the short-circuit plate and consequently to the wall of the housing 1 thus causing short circuit.
  • the overvoltage protection module functions as follows: in case of overvoltage or increased voltage the varistor 2 gets heated which causes heating of the meltable material in the piston 3, consequently the pre-stressed spring 5 releases and pushes the plate 4 against the wall of the housing 1 and thus short circuit occurs between the supply pins 1a and 8a.
  • the overvoltage protection module according to embodiment I is provided in the interior of the housing 1 with the varistor 2, above which a piston 31 with a movable plate 41 is arranged.
  • a cylindrical pin 41a provided with a spring 51 is arranged perpendicularly to the plate 41.
  • the plate 41 with the spring 51 is arranged in a wall 31a of the piston 31 and fixed with a meltable material 12.
  • the material 12 blocks the spring 51.
  • the module according to embodiment I gets heated due to the heating of the varistor 2, the piston 31 and the material 12 also get heated, which releases the pre-stressed spring 51 that pushes the short-circuit plate 41 against the wall of the housing and causes short circuit.
  • the overvoltage protection module of the invention is suitable mostly for wind farms and solar power plants.

Abstract

The invention belongs to the field of devices for energy overvoltage protection, more precisely to the field of modules provided with a varistor and a system for triggering short circuit upon occurrence of overvoltage in a network.
An overvoltage protection module is characterised in that a varistor (2) gets heated in case of overvoltage and causes heating of the meltable material in a piston (3) which releases a pre-stressed spring (5) that pushes a plate (4) against a wall of a housing (1) thus creating short circuit between supply pins (1a and 8a).

Description

    Field of Invention
  • The invention belongs to the field of devices for energy overvoltage protection, more precisely to the field of modules provided with a varistor and a system for triggering short circuit upon occurrence of overvoltage in a network.
    • Technical Problem
  • The technical problem solved by the present invention is a constructional solution to a reliable and rapid operation of an overvoltage protection module with a varistor that creates short circuit by overheating a triggering element. Despite lightning protection, electric installations in homes, schools, hospitals, industrial facilities, offices, power plants and similar places may be burdened with short-term surge voltages that can damage devices and apparatuses connected to a network. These devices can be protected by integrated overload modules that intercept high voltages and cut off the supply voltage.
    • Prior Art
  • Various forms of overvoltage modules based on varistor operation are known. EP 1 798 742 A1 discloses an overvoltage protection element including a wafer of a varistor and a meltable member bridging the wafer of the varistor in case of thermal overload. The solution is based on a solder arranged around an internal piston that gets heated in case of thermal overload of the varistor, the solder melts and flows from the piston to the bottom of a housing thus creating short circuit between the housing and the internal piston, which functions as a short-circuit bridge. This solution is closest to the solution of the invention in that the heating of the varistor in the solution from EP 1 798 742 A1 causes short circuit between the internal piston and the bottom of the module, whereas, according to the present invention, two blocking elements from a meltable material start melting, which releases a spring that pushes a plate against a wall of the housing thus causing short circuit.
    • Solution to the Technical Problem
  • The essence of the overvoltage protection module of the invention lies in a constructional shape of a section causing short circuit when a varistor gets heated due to the presence of overvoltage overload.
  • The overvoltage protection module of the invention will be described in more detail in the continuation by way of drawings representing in:
    • Figure 1 - Overvoltage protection module assembly
    • Figure 2 - Piston 31 with plate 41 and spring 51
  • An overvoltage protection module consists of a housing 1 shaped like a hollow cuboid with a cylindrical threaded pin 1a. The bottom of the housing 1 is provided with a varistor 2, above which there is a piston 3 with drilled holes 3a and 3b on both parallel sides, between which a movable side wall shaped like a plate 4 is arranged. The movable side wall 4 is provided at its upper edge with drilled holes 4a and 4b and at its side edge with two holes 4c. The internal side of the plate 4 is provided with a holder of a spring 5 compressed in a way that the external part of the plate 4 is level with the external edges of the piston 3. A meltable material is poured or inserted into said drilled holes 3a and 3b and the parallel drilled holes 4a and 4b. A plate 7, onto which a flexible wire 6 is fastened, is fastened with screws 7a and 7b in the drilled holes 4a and 4b. The piston 3 is closed by a piston 8 having a cylindrical pin 8a that simultaneously also functions as a second connection pin. The cylindrical pin 8a of the piston 8 is provided with a rectangular insulation body 9 with one cut-out wall that allows the plate 4 to come in contact with the wall of the housing 1 in case of overvoltage on the varistor 2. The body 9 together with the varistor 2, the piston 3 with the plate 4, the wire 6 on the plate 7 and with the piston 8 assembly are pushed towards the bottom of the housing 1 by a spring 10 that is compressed by a cover 11 with a round hole 11a for the pin 8a.
  • The piston 3 is provided with several drilled holes on two parallel side walls and with one or several drilled holes on the bottom section of the piston 3. The movable side wall 4 on the upper edge is provided with two or several drilled holes and with two or several holes on side edges and/or a hole in the bottom side.
  • In case of overvoltage or increased temperature in the network the varistor 2 gets heated, consequently the piston 3 and the material in the neighbouring drilled holes 3a and 4a and the drilled holes 3b and 4b get heated as well. The softened material in the neighbouring drilled holes 3a and 4b and in the drilled holes 3b and 4b can no longer withstand the force of the pre-stressed spring 5, which causes the pre-stressed spring 5 to release and push the short-circuit plate 4 into the wall of the housing 1. The short-circuit plate 4 is linked to the piston 3 with a flexible wire 6, through which current flows to the short-circuit plate and consequently to the wall of the housing 1 thus causing short circuit.
  • The overvoltage protection module functions as follows: in case of overvoltage or increased voltage the varistor 2 gets heated which causes heating of the meltable material in the piston 3, consequently the pre-stressed spring 5 releases and pushes the plate 4 against the wall of the housing 1 and thus short circuit occurs between the supply pins 1a and 8a.
  • The overvoltage protection module according to embodiment I is provided in the interior of the housing 1 with the varistor 2, above which a piston 31 with a movable plate 41 is arranged. A cylindrical pin 41a provided with a spring 51 is arranged perpendicularly to the plate 41. The plate 41 with the spring 51 is arranged in a wall 31a of the piston 31 and fixed with a meltable material 12. The material 12 blocks the spring 51.
  • In case of overvoltage or increased voltage in the network the module according to embodiment I gets heated due to the heating of the varistor 2, the piston 31 and the material 12 also get heated, which releases the pre-stressed spring 51 that pushes the short-circuit plate 41 against the wall of the housing and causes short circuit. The overvoltage protection module of the invention is suitable mostly for wind farms and solar power plants.

Claims (4)

  1. An overvoltage protection module is characterised in that a varistor (2) gets heated in case of overvoltage and causes heating of the meltable material in a piston (3) which releases a pre-stressed spring (5) that pushes a plate (4) against a wall of a housing (1) thus creating short circuit between supply pins (1a and 8a).
  2. The overvoltage protection module according to claim 1 characterised in that a bottom of the housing (1) is provided with a varistor (2) above which there is a piston (3) with drilled holes (3a and 3b) on two parallel sides, between which a movable side wall shaped like a plate (4) is arranged; that the movable side wall (4) is provided at its upper edge with drilled holes (4a and 4b) and at its side edge with two holes (4c); that the internal side of the plate (4) is provided with a holder of a spring (5) compressed in a way that the external part of the plate (4) is level with the external edges of the piston (3); that a meltable material is poured or inserted into said drilled holes (3a and 3b) and the parallel drilled holes (4a and 4b); that a plate (7) onto which a flexible wire (6) is fastened, is fastened with screws (7a and 7b) in the drilled holes (4a and 4b); that the piston (3) is closed by a piston (8) having a cylindrical pin (8a) that simultaneously also functions as a second connection pin; that the cylindrical pin (8a) of the piston (8) is provided with a rectangular insulation body (9) with one cut-out wall that allows the plate (4) to come in contact with the wall of the housing (1) in case of overvoltage on the varistor (2); that the body (9) together with the varistor (2), the piston (3) with the plate (4), the wire (6) on the plate (7) and the piston (8) are pushed towards the bottom of the housing (1) by a spring (10) that is compressed by a cover (11) with a round hole (11a) for the pin (8a).
  3. The overvoltage protection module according to claim 1, characterised in that the piston (3) is provided with several drilled holes on two parallel side walls and with one or several drilled holes on the bottom section of the piston (3); that the movable.side wall (4) on the upper edge is provided with two or several drilled holes and with two or several holes on side edges and/or a hole in the bottom side.
  4. The overvoltage protection module according to claim 2 characterised in that it is provided in the interior of the housing (1) with the varistor (2), above which a piston (31) with a movable plate (41) is arranged; that a cylindrical pin (41 a) provided with a spring (51) is arranged perpendicularly to the plate (41); that the plate (41) with the spring (51) is arranged in a wall (31a) of the piston (31) and fixed with a meltable material (12).
EP12468006.7A 2012-10-24 2012-12-30 Overvoltage protection module Active EP2725588B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SI201230568A SI2725588T1 (en) 2012-10-24 2012-12-30 Overvoltage protection module
RS20160361A RS54797B1 (en) 2012-10-24 2012-12-30 Overvoltage protection module
HRP20160582TT HRP20160582T1 (en) 2012-10-24 2016-05-30 Overvoltage protection module
CY20161100482T CY1117597T1 (en) 2012-10-24 2016-06-01 HYPERTENSION PROTECTION UNIT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SI201200318A SI24213A (en) 2012-10-24 2012-10-24 Overvoltage protection module

Publications (2)

Publication Number Publication Date
EP2725588A1 true EP2725588A1 (en) 2014-04-30
EP2725588B1 EP2725588B1 (en) 2016-03-02

Family

ID=48190003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12468006.7A Active EP2725588B1 (en) 2012-10-24 2012-12-30 Overvoltage protection module

Country Status (11)

Country Link
EP (1) EP2725588B1 (en)
CY (1) CY1117597T1 (en)
DK (1) DK2725588T3 (en)
ES (1) ES2574202T3 (en)
HR (1) HRP20160582T1 (en)
HU (1) HUE027576T2 (en)
PL (1) PL2725588T3 (en)
PT (1) PT2725588E (en)
RS (1) RS54797B1 (en)
SI (2) SI24213A (en)
SM (1) SMT201600170B (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20152327A1 (en) * 2015-07-20 2017-01-20 Zotup S R L IMPROVED DISCONNECTOR AND OVERVOLTAGE RELEASE INCLUDING THIS DISCONNECTOR
WO2017178631A1 (en) * 2016-04-14 2017-10-19 Epcos Ag Varistor component and method for securing a varistor component
US9906017B2 (en) 2014-06-03 2018-02-27 Ripd Research And Ip Development Ltd. Modular overvoltage protection units
DE102017118181A1 (en) * 2017-07-07 2019-01-10 Dehn + Söhne Gmbh + Co. Kg Encapsulated overvoltage protection device with a cup-like housing
US10325703B2 (en) 2016-02-19 2019-06-18 Epcos Ag Varistor component and method for securing a varistor component
US10447026B2 (en) 2016-12-23 2019-10-15 Ripd Ip Development Ltd Devices for active overvoltage protection
CN110797156A (en) * 2019-11-08 2020-02-14 琦洲电气股份有限公司 Novel resistance cabinet shell
US10679814B2 (en) 2017-05-12 2020-06-09 Raycap IP Development Ltd Surge protective device modules including integral thermal disconnect mechanisms and methods including same
US10685767B2 (en) 2017-09-14 2020-06-16 Raycap IP Development Ltd Surge protective device modules and systems including same
US10707678B2 (en) 2016-12-23 2020-07-07 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
US10734176B2 (en) 2016-11-30 2020-08-04 Raycap, Surge Protective Devices, Ltd. Surge protective device modules and DIN rail device systems including same
US11223200B2 (en) 2018-07-26 2022-01-11 Ripd Ip Development Ltd Surge protective devices, circuits, modules and systems including same
US11723145B2 (en) 2021-09-20 2023-08-08 Raycap IP Development Ltd PCB-mountable surge protective device modules and SPD circuit systems and methods including same
US11862967B2 (en) 2021-09-13 2024-01-02 Raycap, S.A. Surge protective device assembly modules

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213345A (en) * 1963-09-05 1965-10-19 Mallory & Co Inc P R Polarized shorting fuse for battery cells
EP1798742A1 (en) 2005-12-15 2007-06-20 Raycap Corporation Overvoltage protection device including a wafer of varistor material and a meltable member bridging the wafer of varistor material in case of thermal overload
WO2011039342A1 (en) * 2009-10-02 2011-04-07 Phoenix Contact Gmbh & Co. Kg Overvoltage protection element
US20110211287A1 (en) * 2008-08-25 2011-09-01 Dehn + Sohne Gmbh + Co. Kg Surge arrestor comprising at least one arrestor element
DE102011018556A1 (en) * 2011-02-18 2012-08-23 Dehn + Söhne Gmbh + Co. Kg Overvoltage protection device comprising at least one surge arrester

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213345A (en) * 1963-09-05 1965-10-19 Mallory & Co Inc P R Polarized shorting fuse for battery cells
EP1798742A1 (en) 2005-12-15 2007-06-20 Raycap Corporation Overvoltage protection device including a wafer of varistor material and a meltable member bridging the wafer of varistor material in case of thermal overload
US20110211287A1 (en) * 2008-08-25 2011-09-01 Dehn + Sohne Gmbh + Co. Kg Surge arrestor comprising at least one arrestor element
WO2011039342A1 (en) * 2009-10-02 2011-04-07 Phoenix Contact Gmbh & Co. Kg Overvoltage protection element
DE102011018556A1 (en) * 2011-02-18 2012-08-23 Dehn + Söhne Gmbh + Co. Kg Overvoltage protection device comprising at least one surge arrester

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9906017B2 (en) 2014-06-03 2018-02-27 Ripd Research And Ip Development Ltd. Modular overvoltage protection units
US10340688B2 (en) 2014-06-03 2019-07-02 Ripd Ip Assets Ltd Modular overvoltage protection units
US10062534B2 (en) 2015-07-20 2018-08-28 Zotup S.R.L. Disconnector and surge arrester including such disconnector
RU2714927C2 (en) * 2015-07-20 2020-02-21 Дзотуп С.Р.Л. Improved disconnector and surge arrester including such disconnector
WO2017013092A1 (en) * 2015-07-20 2017-01-26 Zotup S.R.L. Improved disconnector and surge arrester including such disconnector
ITUB20152327A1 (en) * 2015-07-20 2017-01-20 Zotup S R L IMPROVED DISCONNECTOR AND OVERVOLTAGE RELEASE INCLUDING THIS DISCONNECTOR
US10325703B2 (en) 2016-02-19 2019-06-18 Epcos Ag Varistor component and method for securing a varistor component
EP4270687A3 (en) * 2016-04-14 2024-02-28 TDK Electronics AG Varistor component and method for securing a varistor component
WO2017178631A1 (en) * 2016-04-14 2017-10-19 Epcos Ag Varistor component and method for securing a varistor component
US11443876B2 (en) 2016-04-14 2022-09-13 Tdk Electronics Ag Varistor component and method for securing a varistor component
US10734176B2 (en) 2016-11-30 2020-08-04 Raycap, Surge Protective Devices, Ltd. Surge protective device modules and DIN rail device systems including same
US11881704B2 (en) 2016-12-23 2024-01-23 Ripd Research And Ip Development Ltd. Devices for active overvoltage protection including varistors and thyristors
US10447026B2 (en) 2016-12-23 2019-10-15 Ripd Ip Development Ltd Devices for active overvoltage protection
US11374396B2 (en) 2016-12-23 2022-06-28 Ripd Research And Ip Development Ltd. Devices for active overvoltage protection
US10707678B2 (en) 2016-12-23 2020-07-07 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
US11165246B2 (en) 2016-12-23 2021-11-02 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
US10679814B2 (en) 2017-05-12 2020-06-09 Raycap IP Development Ltd Surge protective device modules including integral thermal disconnect mechanisms and methods including same
DE102017118181B4 (en) 2017-07-07 2019-01-17 Dehn + Söhne Gmbh + Co. Kg Encapsulated overvoltage protection device with a cup-like housing
DE102017118181A1 (en) * 2017-07-07 2019-01-10 Dehn + Söhne Gmbh + Co. Kg Encapsulated overvoltage protection device with a cup-like housing
US10685767B2 (en) 2017-09-14 2020-06-16 Raycap IP Development Ltd Surge protective device modules and systems including same
US11223200B2 (en) 2018-07-26 2022-01-11 Ripd Ip Development Ltd Surge protective devices, circuits, modules and systems including same
CN110797156A (en) * 2019-11-08 2020-02-14 琦洲电气股份有限公司 Novel resistance cabinet shell
US11862967B2 (en) 2021-09-13 2024-01-02 Raycap, S.A. Surge protective device assembly modules
US11723145B2 (en) 2021-09-20 2023-08-08 Raycap IP Development Ltd PCB-mountable surge protective device modules and SPD circuit systems and methods including same

Also Published As

Publication number Publication date
PT2725588E (en) 2016-06-07
EP2725588B1 (en) 2016-03-02
SMT201600170B (en) 2016-07-01
PL2725588T3 (en) 2016-10-31
SI2725588T1 (en) 2016-08-31
HRP20160582T1 (en) 2016-06-17
HUE027576T2 (en) 2016-11-28
SI24213A (en) 2014-04-30
DK2725588T3 (en) 2016-05-30
RS54797B1 (en) 2016-10-31
CY1117597T1 (en) 2017-04-26
ES2574202T3 (en) 2016-06-15

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