EP2765590A1 - Mécanisme de déclenchement pour un dispositif de protection contre les surtensions et dispositif de protection contre les surtensions - Google Patents
Mécanisme de déclenchement pour un dispositif de protection contre les surtensions et dispositif de protection contre les surtensions Download PDFInfo
- Publication number
- EP2765590A1 EP2765590A1 EP20120847145 EP12847145A EP2765590A1 EP 2765590 A1 EP2765590 A1 EP 2765590A1 EP 20120847145 EP20120847145 EP 20120847145 EP 12847145 A EP12847145 A EP 12847145A EP 2765590 A1 EP2765590 A1 EP 2765590A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tripping
- slidable block
- tripping mechanism
- electrode
- rod
- 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
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 63
- 230000001012 protector Effects 0.000 title claims abstract description 43
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 25
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 25
- 229910000679 solder Inorganic materials 0.000 claims abstract description 11
- 230000009471 action Effects 0.000 claims description 6
- 238000010292 electrical insulation Methods 0.000 abstract description 4
- 230000001965 increasing effect Effects 0.000 abstract description 4
- 238000003466 welding Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Images
Classifications
-
- 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
- H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
-
- 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
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/10—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess voltage, e.g. for lightning protection
-
- 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
- H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
- H01H2037/762—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts
-
- 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
- H01T1/00—Details of spark gaps
- H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
Definitions
- This invention relates to a surge protector, and especially relates to a tripping mechanism for the surge protector.
- Surge protectors are commonly used in the electrical circuits used in families, offices and industrial sites, etc. to prevent damage to the electrical apparatus caused by the instantaneous overvoltage in the circuits.
- the surge protector can conduct and divide the current in an extremely short time so as to avoid the damage to other apparatus in the circuits caused by the surge.
- the most commonly used surge protector comprises an element called metal oxide varistor (MOV) for transferring the redundant voltage.
- MOV metal oxide varistor
- the metal oxide varistor has a very large resistance in normal working state, and thus substantively shows an off state.
- the resistance of the MOV dramatically decreases, and thus the MOV is almost in a conductive state and transfers a large volume of current to eliminate redundant voltage.
- the metal oxide varistor will age and thus generate heat.
- it is common to provide an tripping mechanism in the surge protector, the tripping mechanism and the metal oxide varistor are connected in series so that the metal oxide varistor disconnects with the circuit when the temperature rises.
- Fig. 1 shows a tripping mechanism adopted by the prior art.
- the tripping mechanism mainly comprises a substantially plate-shaped tripping rod 1, the tripping rod 1 is mounted on a frame bracket 2 through a pivot 3 provided on the frame bracket 2 of the surge protector so as to be able to swing, and an upper end 11 of the tripping rod 1 is biased towards the right side of Fig. 1 , i.e. towards the trip direction, by biasing springs 4.
- a remote signal switch lever 12 is integrally formed at a lower end of the tripping rod 1, the remote signal switch lever 12 cooperates with a remote signal switch (not shown) to trigger the remote signal switch.
- the middle portion of the tripping rod 1 is welded to MOV 5 through low-temperature solder (not shown), the tripping rod 1 is further connected to a terminal 9 of the surge protector through a lead 8, and the terminal 9 connects to an outside circuit.
- the other electrode of MOV 5 connects to the other terminal 10 of the surge protector, and thus the surge protector is connected to the circuit.
- One end of the indicator bracket 6 is an indication part, commonly in green color, the indication part can be exposed through an opening provided on a housing (not shown) of the surge protector, and thus the indication part is visible from outside.
- a red indication part is formed on the frame bracket 2 at a position corresponding to the green indication part.
- the tripping rod 1 In the normal working state, the tripping rod 1 is soldered to MOV 5 through low temperature solder, and the tripping rod 1 electrically and mechanically connects to MOV 5. Meanwhile, the tripping rod 1 is located at the position shown in Fig. 1 , and the indicator bracket 6 is maintained at the position shown in Fig. 1 by abutting against the upper end of the tripping rod 1; and at the same time, the green indication part on the indicator bracket 6 covers the red indication part on the frame bracket 2, and thus the green indication part, which indicates that the surge protector is currently in normal working state, can be seen from outside of the housing of the surge protector.
- the tripping rod 1 rotates clockwise about the pivot 3 in the figure under the action of the biasing springs 4, and thus the electrical connection between the tripping rod 1 and MOV 5 is disconnected. Meanwhile, the remote signal switch lever 12 at the lower end of the tripping rod 1 triggers the remote control switch with the rotation of the tripping rod 1 so as to send to the remote control apparatus a signal indicating the tripping of the tripping rod 1.
- the indicator bracket 6 slides towards right on the upper side of the frame bracket 2 under the action of the biasing spring 7, and thus the green indication part moves to the right side to expose the red indication part provided on the frame bracket 2, and thus the red indication part, which indicates the tripping of the surge protector, can be seen from outside of the housing of the surge protector.
- the conventional tripping mechanism of the surge protector has following problems: the tripping rod 1 moves substantially in a plane parallel to a side of MOV 5, and thus even in the case that the tripping rod 1 trips, the electrical distance between the tripping rod 1 and the electrode of MOV 5 is very short, and this is disadvantageous to the electrical isolation between the tripping rod 1 and the electrode of MOV 5 in the trip state. Furthermore, the protection level and current leakage capacity of the standard MOV product are limited, and the cost of adopting non-standard single sheet product is high. So, for example, when a nominal discharge current of 35kA is required, two standard single sheet MOVs of 20kA are usually used to achieve this, so a solution occurs where two MOVs are used.
- This invention is made based on the problems of the prior art, and an object of the invention is to provide a tripping mechanism for a surge protector, the tripping mechanism can ensure the electrical distance between a tripping rod and MOV in the trip state, and when a plurality of MOVs are used, simultaneously tripping of the plurality of MOVs can be easily realized.
- a tripping mechanism comprising: a frame bracket for receiving at least one metal oxide varistor; and a tripping rod pivotably arranged on the frame bracket and connected to the one electrode of the electrodes of the metal oxide rheostat via low temperature solder.
- the tripping mechanism further comprises a slidable block slidably arranged on the bracket frame, the slidable block is slidable between a first position and a second position and is biased towards a trip position; in a normal working state, the slidable block is maintained at the first position by the tripping rod counteracting the biasing pressure, and in a trip state, the sliding movement of the slidable block towards the second position under the action of the biasing pressure causes the tripping rod to pivot in a direction away from the electrode of the metal oxide varistor.
- the tripping mechanism further is further provided with a swing arm which is pivotally mounted on the frame bracket, and the sliding movement of the slidable block towards the second position causes the swing arm to pivot to trigger a remote control switch.
- the tripping of the tripping rod and the swing of the swing arm are both realized by the movement of the slidable block, so the structure of the whole tripping mechanism is simplified, the manufacture cost is reduced and the reliability of the mechanism is improved.
- the slidable block is provided a state indication part indicating the normal working state, and when the slidable block is at the first position, the state indication part is visible from outside through an opening or a transparent window provided in a housing of the surge protector.
- the frame bracket is provided with a state indication part indicating the trip state, when the slidable block is at the first position, the state indication part indicating the trip state is shielded by the state indication part indicating the normal working state provided on the slidable block, and when the slidable block is at the second position, the state indication part indicating the trip state is exposed and is visible from outside through the opening or the transparent window provided on the housing of the surge protector.
- the slidable block comprises an inclined surface, the tripping rod abuts against the inclined surface when the slidable block is at the first position.
- the slidable block is located between the electrode and the tripping rod when the slidable block is at the second position.
- a channel is provided on a lower side of the inclined surface, the electrode is received in the channel when the slidable block is at the second position.
- the slidable block is located between the tripping rod and the electrode of MOV, and receives the electrode in its channel, further enhancing the electrical insulation strength between the tripping rod and the electrode of MOV.
- the tripping mechanism further comprises one or more biasing springs, one end of which is attached to the slidable block, and the other end of which is attached to the frame bracket to bias the slidable block towards the second position.
- a first end of the tripping rod pivotably connects to the frame bracket, and a second end of the tripping rod is welded to the electrode.
- the second end of the tripping rod is formed with a slit, and the electrode is inserted into the slit and is welded thereto.
- the welding reliability between the electrode of MOV and the tripping rod can be improved by inserting the electrode of MOV into slit and being welded at the slit, and such lateral soldering method can reduce the thermal impact of the surge on the MOV.
- two metal oxide varistors are received in the bracket frame of the tripping mechanism, and the respective electrodes of the two metal oxide varistors are welded at the same position of the same tripping rod, i.e. the two respective electrodes of the two metal oxide varistors are both inserted into the slit of the tripping rod and are welded there through low-temperature solder.
- a surge protector which comprises the above tripping mechanism.
- the tripping mechanism 100 comprises a frame bracket 110, the frame bracket 110 is substantially in the form of a square frame and is used to receive a MOV 200.
- a pivot 111 is formed at the right upper corner of the frame bracket 110, and a tripping rod 120 is pivotably arranged on the frame bracket 110 around the pivot 111.
- a circular recess or a hole can be formed at one end 121 (the right end in the drawing) of the tripping rod 120, and the pivot 111 is inserted into the circular recess or the hole.
- the tripping rod 120 is connected to a terminal 300 of the surge protector through a lead 122, and the terminal 300 is used for connecting the surge protector with an external circuit.
- connection end is substantially in the form of a flat panel
- connection end is substantially in the form of a flat panel
- concave platform 123 is formed at substantially the meddle part of the flat panel in the width direction of the flat panel shaped connection end
- the concave platform 123 is formed with a through slit 124 at its middle portion, the through slit 124 may open at one end or both ends of the through slit 124 are closed.
- a slidable block 130 is arranged on an upper side surface of the frame bracket 110.
- the slidable block 130 is slidably arranged on the upper side surface of the frame bracket 110, for example, a guide portion 112 is provided on the frame bracket 110, and the slidable block 130 can slide under the guidance of the guide portion 112.
- biasing springs 140 are further provided (two springs in the drawing), one end of the biasing springs is attached to the right end of the slidable block 130, and the other end of the biasing springs is attached to the pivot 111, and thus the slidable block 130 is biased towards the right side under the action of the biasing springs 140, i.e. is biased towards the pivot 111.
- the slidable block 130 is formed with an indication part 131, i.e. a green indication part, at its left end. Similar to the prior art, in the state as shown in Fig. 2B , the green indication part is exposed through an opening or a window provided in the housing of the surge protector to indicate that the surge protector is in a normal working state.
- Another pivot 113 is formed at the lower side of the frame bracket 110, a swing arm 150 is pivtoably arranged on the frame bracket 110 through the pivot 113, and one end (the lower end in the drawing) of the swing arm 150 is formed with a switch trigger part 151 for triggering a remote control switch which is not shown in the drawing.
- the other end (the upper end in the drawing) of the swing arm 150 is formed with a driven portion 152 which engages with a protrusion 132 provided on the slidable block 130, and the protrusion will push the swing arm 150 to rotate clockwise about the pivot 113 when the slidable block 130 slides towards the right side.
- the MOV 200 comprises two electrodes 210 and 220. As shown in Figs. 3C and 4 , in the normal working state, the MOV 200 is received in the frame bracket 110, and one electrode 210 of the MOV is inserted into the slit 124 formed in the concave platform 123 of the tripping rod 120, and is connected to the tripping rod 120 through a low temperature solder 400. The other electrode 220 of the MOV 200 is connected to the other terminal 500 of the surge protector, e.g. through welding, while the other terminal 500 is connected to an external circuit.
- the MOV 200 is connected to one phase of the external circuit through the tripping rod 120 and the terminal 300, and on the other hand, is connected to the other phase of the external circuit through the other electrode 220 and the other terminal 500 of the surge protector, and when the voltage between the two phases of the external circuit exceeds the predetermined voltage, the MOV 200 conducts the two phases and functions to divide the current and reduce the voltage.
- the middle part of the slidable block 130 is formed with an inclined surface 133, an edge of the connection end of the tripping rod 120 abuts against the inclined surface 133, and thus preventing the slidable block 130 from moving towards the pivot 111 by the biasing spring 140.
- the slidable block 130 is located at the first position, the indication part 131 is visible from outside through the opening or the transparent window provided on the housing of the surge protector, thus indicating that the surge protector is in a normal working state.
- Fig. 5 shows the tripping mechanism in the trip state. In the state shown in Fig.
- the slidable block 130 has slided to the second position on the right side, pushing the tripping rod 120 away upward, and at the same time the slidable block 130 covers the electrode 210 of the MOV 200; at this time, the electrode 210 is received in the channel 134, and thus the electrode 210 and the tripping rod 130 are electrically isolated.
- the green indication part 131 has moved to the right, and thus a red indication part 114, which is provided on the frame bracket 110 and was shielded by the green indication part 131, is exposed.
- the protrusion 132 on the slidable block 130 pushes the driven portion 152 of the swing arm 150, making the swing arm 150 rotate clockwise about the pivot 113, and thus the switch trigger part 151 triggers the remote control switch (not shown), sending surge protector tripping signal to the remote control apparatus.
- Figs. 6 and 7 show the tripping mechanism according to the second embodiment of the invention
- the structure of this tripping mechanism is substantially the same as that of the one described above, the difference lies in that the frame bracket 110 receives two MOVs 200.
- the electrodes of the MOVs 200 are both inserted into the slit 240 of the tripping rod 120, and are welded to the tripping rod 120 through low-temperature solder 400.
- the mechanism trips simultaneously. Since other parts of the second embodiment are the same as the first embodiment, and the description is omitted.
- the tripping rod 120 rotates in a direction away from the electrode 210 of the MOV 200, as a result, the electrical distance between the tripping rod 120 and the electrode 210 is increased, the reliability of the electrical insulation between the tripping rod 120 and the electrode 210 is improved.
- the slidable block 130 slides to a position between the tripping rod 120 and the electrode 210 of the MOV 200, and covers the electrode 210 of the MOV 200, and thus the electrical insulation strength between the tripping rod 120 and the electrode 210 is further enhanced.
- the electrodes 210 of two MOVs 200 are welded at the same position of the tripping rod 120 by using low-temperature solder, when the temperature rises, even if two MOVs 200 transfer different amount of heat to the welding point through their respective electrode, since the hest is applied to the same welding point, the mechanism will trip simultaneously, and thus improve the reliability of the tripping mechanism.
- both the pivoting of the tripping rod 120 and the swing of the swing arm 150 are activated by the sliding of the slidable block 130, as a result, the structure of the whole tripping mechanism is simplified, the cost of the production is saved and the reliability of the whole tripping mechanism is improved.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuses (AREA)
- Thermistors And Varistors (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201110346844.8A CN103094013B (zh) | 2011-11-07 | 2011-11-07 | 电涌保护器的脱扣机构和电涌保护器 |
PCT/CN2012/084178 WO2013067923A1 (fr) | 2011-11-07 | 2012-11-07 | Mécanisme de déclenchement pour un dispositif de protection contre les surtensions et dispositif de protection contre les surtensions |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2765590A1 true EP2765590A1 (fr) | 2014-08-13 |
EP2765590A4 EP2765590A4 (fr) | 2015-05-20 |
EP2765590B1 EP2765590B1 (fr) | 2016-10-19 |
Family
ID=48206464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12847145.5A Active EP2765590B1 (fr) | 2011-11-07 | 2012-11-07 | Mécanisme de déclenchement pour un dispositif de protection contre les surtensions et dispositif de protection contre les surtensions |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2765590B1 (fr) |
CN (1) | CN103094013B (fr) |
BR (1) | BR112014010904B1 (fr) |
ES (1) | ES2611404T3 (fr) |
WO (1) | WO2013067923A1 (fr) |
ZA (1) | ZA201404030B (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3872830A1 (fr) * | 2020-02-27 | 2021-09-01 | Legrand France | Appareil électrique contre les surtensions transitoires et un dispositif de varistances à détection d'emballement thermique |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108418181A (zh) * | 2018-05-18 | 2018-08-17 | 谭乔文 | 一种无续流无盲区无误动作的延时型电涌保护器后备保护器 |
CN112054496B (zh) * | 2020-09-04 | 2022-06-03 | 上海闪替电子科技有限公司 | 一种浪涌保护模块 |
CN114552548B (zh) * | 2022-03-05 | 2023-08-01 | 安徽诺希电气设备科技有限公司 | 一种安全性能强的过电压保护器 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2657994B1 (fr) * | 1990-02-08 | 1992-04-17 | Merlin Gerin | Parafoudre deconnectable pour reseau a basse tension. |
AT400781B (de) * | 1993-11-02 | 1996-03-25 | Felten & Guilleaume Ag Oester | Überspannungsschutzvorrichtung |
CN2566515Y (zh) * | 2002-08-05 | 2003-08-13 | 浙江神龙电器有限公司 | 接入低压配电系统的电涌保护器 |
CN2636474Y (zh) * | 2003-06-18 | 2004-08-25 | 杨金锡 | 双重自保护式电源防雷模块 |
MXPA06012057A (es) * | 2004-04-19 | 2007-01-25 | Soule Protection Surtensions | Dispositivo de proteccion contra sobretensiones con medios de desconexion e indicacion visual mejorados. |
CN200976332Y (zh) * | 2006-11-06 | 2007-11-14 | 浙江恒丰光电技术有限公司 | 电源浪涌保护器 |
CZ2009164A3 (cs) * | 2009-03-16 | 2010-09-29 | Cernicka@Jozef | Zarízení pro prepetovou ochranu |
CN201466705U (zh) * | 2009-05-11 | 2010-05-12 | 上海雷尔盾电气有限公司 | 电涌保护器 |
CN101834434B (zh) * | 2009-07-27 | 2012-05-23 | 佛山市浦斯电子有限公司 | 一种具有热保护装置的电涌保护器 |
FR2954579B1 (fr) * | 2009-12-18 | 2014-07-04 | Schneider Electric Ind Sas | Ensemble de protection contre les surtensions |
CN202282310U (zh) * | 2011-11-07 | 2012-06-20 | 施耐德电器工业公司 | 电涌保护器的脱扣机构和电涌保护器 |
-
2011
- 2011-11-07 CN CN201110346844.8A patent/CN103094013B/zh active Active
-
2012
- 2012-11-07 BR BR112014010904-4A patent/BR112014010904B1/pt active IP Right Grant
- 2012-11-07 ES ES12847145.5T patent/ES2611404T3/es active Active
- 2012-11-07 WO PCT/CN2012/084178 patent/WO2013067923A1/fr active Application Filing
- 2012-11-07 EP EP12847145.5A patent/EP2765590B1/fr active Active
-
2014
- 2014-06-03 ZA ZA2014/04030A patent/ZA201404030B/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3872830A1 (fr) * | 2020-02-27 | 2021-09-01 | Legrand France | Appareil électrique contre les surtensions transitoires et un dispositif de varistances à détection d'emballement thermique |
FR3107780A1 (fr) * | 2020-02-27 | 2021-09-03 | Legrand France | Appareil électrique contre les surtensions transitoires et un dispositif de varistances à détection d’emballement thermique |
Also Published As
Publication number | Publication date |
---|---|
WO2013067923A1 (fr) | 2013-05-16 |
ZA201404030B (en) | 2015-12-23 |
EP2765590A4 (fr) | 2015-05-20 |
EP2765590B1 (fr) | 2016-10-19 |
CN103094013A (zh) | 2013-05-08 |
BR112014010904A2 (pt) | 2017-04-18 |
CN103094013B (zh) | 2015-12-23 |
BR112014010904B1 (pt) | 2021-01-05 |
ES2611404T3 (es) | 2017-05-08 |
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Legal Events
Date | Code | Title | Description |
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