US3755715A - Line protector having arrester and fail-safe circuit bypassing the arrester - Google Patents

Line protector having arrester and fail-safe circuit bypassing the arrester Download PDF

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Publication number
US3755715A
US3755715A US00296578A US3755715DA US3755715A US 3755715 A US3755715 A US 3755715A US 00296578 A US00296578 A US 00296578A US 3755715D A US3755715D A US 3755715DA US 3755715 A US3755715 A US 3755715A
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United States
Prior art keywords
arrester
cup
line
conductor
arc
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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.)
Expired - Lifetime
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US00296578A
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English (en)
Inventor
M Klayum
R Greischar
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Reliable Electric Co
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Reliable Electric Co
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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
    • 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

  • a line protector has an arrester through which overpark, 1] voltages on the line of short duration are grounded.
  • the arrester may be of the type having an arc gap [22] filed: 1972 sealed within a gas tube. For an overvoltage of longer 21 AWL 29 ,57 duration, a pellet is melted causing a spring to close a circuit bypassing the gas tube and provide a direct metallic path from the line to ground.
  • a secondary arc gap [52] [1.8. CI 317/62, 317/66, 317/71 between opposed conductors Separated by an insukw [51] Illl. Cl.
  • H0211 9/06 g sleeve has an arc ver voltage that is greater than [58] Field of Search 317/62, 66, 71; the normal weaver voltage of the firsbmenn-oned arc 200/146 AA; 315/125 gap and provides a path to ground for short duration overvoltage conditions in the event of failure of the ar- [56] References cued rester. Excessive current across the secondary arc gap UNITED STAT S AT S may melt the insulator sleeve and engage the opposed 1,200,796 10/1916 Arnold 317/62 X onductors for grounding purposes. 1,201,646 10/1916 Steinmetz 3,651,380 3/1972 Peche et a1. 317/62 12 Claims, 4 Drawing Flglll'es Z x s 50 6 i 32 I0 5, I,
  • This invention relates to line protectors for communications circuits, such as telephone lines and the like.
  • the type of line protector with which the present invention is concerned is one that is intended primarily for protection of wire conductors and equipment connected thereto from electrical overvoltage conditions which may result from lightning, electrical power faults, and the like.
  • Protectors for this purpose may take various forms. Frequently, they are of the type that contain an arc gap across which the overvoltage will be applied whereby an overvoltage of short duration will cause conduction across the arc gap to ground. After the short duration overvoltage condition has passed, the protector returns to its normal or nonconducting state.
  • the arc gap may be in an arrester comprised of spaced carbon electrodes separated by air, or the arc gap may be in a sealed gas tube.
  • the sealed gas tube arrester is essentially a cold cathode discharge tube. Gas tube arresters have a much greater useful life than arresters embodying carbon electrode air gaps.
  • an embodiment of the invention comprises an outer shell or cap that is adapted to be threaded into the well of a protector block or base whereby one side of the protector can be connected to the line and the other side can be connected to a ground terminal.
  • a shunt that forms a low inductance, high currentcarrying connection with the shell.
  • a conducting disc that conductively engages one of the electrodes of a gas tube surge arrester. The opposite electrode of the gas tube rests on a solder pellet, and the gas tube and the solder pellet are within a conductive cup.
  • An insulating sleeve with a series of holes therein surrounds the cup and is, in turn, surrounded by the shunt.
  • the cup is adapted to rest on a contact in the protector block.
  • a spring within the cup applies pressure to the shunt, the disc, the insulating sleeve, and the arrester so that one of the electrodes of the arrester bears firmly against the disc.
  • the other electrode of the arrester bears firmly against the solder pellet, which is supported by the base of the cup.
  • the disc is prevented from engaging the cup so long as the solder pellet remains solid.
  • the solder pellet melts due to an overvoltage condition on the line of long duration the spring will cause the disc to engage the cup and form a metallic grounding circuit of high current carrying capacity bypassing the arrester.
  • the perforated insulating sleeve provides a secondary arc gap between the cup and the shunt that has a arc-over voltage that is greater than the normal arc-over voltage of the arrester but less than the probable arc-over voltage of the arrester if the latter is defective.
  • FIG. 1 shows a sectional view taken substantially through the central axis of a line protector constructed in accordance with and embodying the present invention, the protector being shown in its normal condition and being mounted in position in a block or base assembly;
  • FIG. 2 is a sectional view similar to FIG. 1 but showing the condition of the protector after the latter has been subject to an overvoltage condition of relatively long duration;
  • FIG. 3 is a perspective view of the insulating sleeve that fonns part of the present invention.
  • FIG. 4 is a perspective view of the shunt member that also forms part of the present invention.
  • a line protector 2 that comprises a sheet metal shell or cap 4 having an annular radial flange 6 that is axially spaced from the end wall of the cap.
  • the cap 4 has a cylindrical wall that is formed with a thread 8 and a depending cylindrical skirt 10 adjacent to the thread 8.
  • the skirt l0 terminates in the open end of the cap 4.
  • the shunt member 12 Telescoped within and coaxial with the annular skirt 10 is a metallic shunt member 12.
  • the shunt member 12 includes a side wall 14 and an end wall 16.
  • the side wall 14 is of somewhat frusto-conical shape (see FIG. 4) and is formed with longitudinal cutaway or slot 18 that extends into the end wall 16 and to a hole 20 therein, for purposes more presently fully appearing.
  • a tubular insulating sleeve 22 that is formed of an extruded plastic of suitable type. This may be a polypropylene modified polyvinyl cholride resin.
  • the insulating sleeve 22 is formed with opposed internal ribs 24, 24 that extend longitudinally of the tube wall.
  • the sleeve 22 is also formed with an array of holes 26 that are disposed in a pattern extending around the sleeve and also lengthwise thereof, as best seen in FIG. 3.
  • the wall thickness of the sleeve may be of the order of 0.30 mm.
  • annular conductive disc 28 Positioned within the upper end of the sleeve 22 and also coaxial within the shunt member 12 is an annular conductive disc 28.
  • the disc 28 is in contact with the shunt member 12 at the end wall 16 thereof and is also in contact with one of the electrodes of a gas tube surge arrester 30. More specifically, the disc 28 is flush against the electrode 32 of the gas tube 30 while the other electrode 34 seats on a fusiable solder pellet 35 of annular ring-shaped configuration.
  • the gas tube 30 and the solder pellet 35 are housed within a conductive cup 36, the bottom wall 37 of which supports the pellet 35.
  • the side wall of the cup 36 telescopes coaxially within the insulating sleeve 22.
  • the ribs 24, 24 assist in maintaining the cup 36 in assembled relation with the sleeve 22.
  • the gas tube 30 is a cold cathode tube in which the metallic electrodes 32, 34 are inwardly depressed toward each other to form an arc gap 38 that is sealed within the gas tube 30.
  • the gas tube 30 may have a cylindrical glass or ceramic wall 40 to which the electrodes 32, 34 are sealed at the ends thereof.
  • the interior of the gas tube 30 may be filled with an inert gas or a radioactive gas such as tritium.
  • the interior of the tube 30 may contain an inert gas and a spot or deposit of material 42 that contains a radioactive substance that prompts ionization of the tube.
  • the radioactive substance may be, for example, promethium 147 mixed with a suitable inert binding agent.
  • a coil spring 44 is coaxially positioned within the cap 4 and has one end that abuts the end wall of the cap and another end that bears against the end wall 16 of the shunt member 12.
  • a modicum of pressure is applied to the side wall 14 by the skirt 10.
  • the side wall 14 is pressed against the sleeve 22 which in turn presses against the cup 36.
  • the spring 44 is in its normal expanded position; however, the fit between the various parts is sufficient to hold them together for normal handling and installation purposes.
  • the protector 2 is adapted to be mounted in the well 46 of a dielectric block 48.
  • a metallic contact plate 50 having an internally threaded annular flange 52 for receiving the cap thread 8.
  • the material of the block 48 below the flange 52 is also threaded for some distance so that the cap 4 may be threaded into the well 46 until the flange 6 abuts the contact plate 50.
  • a metallic contact 54 that engages the base 37 of the cup 36.
  • the contact plate 50 and the contact 54 are suitably connected to binding posts (not shown) or other suitable terminals whereby the plate 50 may be connected to ground and the contact 54 may be connected to the line to be protected, or vice-versa.
  • This condition now provides a direct, metallic circuit path from the cup 36 to the grounded plate 50 through the disc 28, the shunt 12 and the cap 4.
  • the arc gap 38 is bypassed so that the line is grounded regardless of the condition or operation of the gas tube 30.
  • the melting point of the solder pellet is sufficiently low that the gas tube 30 is saved from destruction when an overvoltage condition of long duration is present on the line.
  • To restore the protector it is necessary to remove the same from the well 46, and then disassemble and then reassemble the protector with a new solder pellet 35.
  • solder pellet melts the material thereof tends to be confined within the cup 36 so as not to interfere with the other functioning parts of the protector.
  • the solder pellet solidifies when the line fault is removed so that it is a simple matter to remove it when the protector is disassembled.
  • the gas tube arrester provides continuous operation up to and including the time that the solder pellet melts to shunt the current around the gas tube.
  • the shunt path has high current-carrying capacity and is of relatively low inductance.
  • the shunt path does not include the coil spring. This has several advantages. First, the spring is not subject to heat fatigue as a result of current flowing therethrough. In addition, arcing across coils of the spring is prevented so that the spring does not become an inductor to add to the impedance of the shunt circuit. Also, explosive arcs outside of the gas tube during high peak current discharges are eliminated. Such explosive arcs may compress the spring and blow the gas tube out of the circuit. thereby causing loss of transient voltage protection.
  • the holes 26 in the insulating sleeve 22 provide an arc gap between the cup 36 and the shunt 12.
  • This are gap may be considered as a secondary arc gap that has an arc-over voltage that is greater than the normal firing voltage across the arc gap 38 in the gas tube 30.
  • the gap 38 is many times greater than the aforesaid secondary arc gap. Therefore, if the gas tube should become faulty as by a leak, the arc-over voltage at the arc gap 38 will then become much greater than the arc-over voltage of the secondary arc gap. Thus, the arc-over voltage across the secondary arc gap will limit the protector breakdown voltage.
  • This latter voltage will be higher than normal firing voltage of the tube 30 but will at least serve to provide some line protection. Also, should an extreme over current condition result from prolonged arcing across the secondary arc gap, the thin insulating sleeve 22 may melt at least locally so that the shunt 12 is pressed against the cup 36. This forms a direct metallic path to ground.
  • the fusible solder pellet may be a nonmetallic member that is melted by any known means as a result of the overvoltage condition of long duration. Such means could be a heat coil in proximity to the pellet and in series with the contact 54 and electrode 34.
  • a line protector comprising means forming a circuit that comprises in series a fusible solder pellet, spaced electrodes forming an arc gap, first conductor means for connection to a line to be protected, and second conductor means for connection to ground such that an overvoltage surge of short duration at said line will pass current through said series circuit for discharge to ground; said are gap being sealed in a cold cathode gas tube of which said electrodes form a part; means including said solder pellet normally preventing said first and second conductor means being in contact, and spring means for bringing said first and second conductor means into contact exteriorly of said tube to bypass said arc gap upon melting of said solder pellet due to an overvoltage surge of longer duration across said series circuit and thereby provide a direct metallic path from said line'to ground.
  • a line protector according to claim 1 further including means forming a secondary arc gap between said first and second conductor means exteriorly of said tube, said secondary arc gap being less than the arc gap in said tube and having an arc-over voltage that is greater than the arcover voltage of the arc gap in said tube.
  • a line protector according to claim 1 in which one of said conductor means includes a cup, said solder pellet and said tube are in said cup, an insulating sleeve surrounds said cup, and the other conductor means surrounds said insulating sleeve.
  • a line protector according to claim 3 in which said insulating sleeve is perforated to provide an air gap between said sleeve and said other conductor means.
  • a line protector according to claim 5 in which said other conductor means further includes a disc within said shunt, said spring means is in said cap and imposes pressure on said shunt and disc, said disc engaging said cup upon melting of said solder pellet.
  • a line protector comprising means forming a circuit that comprises in series a surge arrester, first conductor means for connection to a line to be protected, and second conductor means for connection to ground such that an overvoltage surge of short duration at the line will pass current through said series curcuit for discharge to ground; fusible means normally preventing said first and second conductor means from being in contact, spring means for bringing said first and second conductor means into contact exteriorly of said surge arrester upon melting of said fusible means due to an overvoltage surge of longer duration across said series circuit to provide a direct metallic path from said line to ground bypassing said arrester, and means forming an arc gap between said first and second conductor means for providing a discharge path to ground in the event of failure of said surge arrester.
  • a line protector comprising a cap, a metallic shunt member within the cap and being slidable relative thereto, a tubular insulating sleeve within the shunt member, a metallic disc member within the shunt member, a metallic cup within the sleeve and being slidable relative thereto, said sleeve being perforated to provide an air gap between the cup and the shunt member, a meltable pellet within the cup, a cold cathode surge arrester tube within the cup and having spaced electrodes respectively in electrical contact with the solder pellet and the disc, said electrodes providing a sealed arc gap within the tube that is greater than said air gap, the environment within said tube being such that the arc-over voltage is less than the arc-over voltage at said air gap, and a spring within said cap for moving an assembly comprising said shunt, said disc, said arrester, and said sleeve upon melting of said pellet to cause said disc to engage said cup.
  • a line protector comprising first conductive means that includes a tubular cap and structure slidably telescoped within the cap coaxial therewith, second conductive means coaxial with said cap, a surge arrester having opposed conductor elements, said first and second conductive means being respectively connected to said conductor elements to provide a current path through said arrester from one conductive means to the other conductive means upon an overvoltage surge of short duration across said surge arrester, spring means in said cap urging said slidable structure toward said second conductive means, and a fusible element preventing engagement of said movable structure with said second conductive means except on melting of said fusible element due to an overvoltage surge of longer duration across said arrester, the engagement of said movable structure and said second conductive means forming a metallic current path bypassing said arrester.
  • a line protector according to claim 9 in which said second conductive means comprises a cup, said arrester and said fusible element being in said cup, and said fusible element is disposed between said arrester and the base of said cup.

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US00296578A 1972-10-11 1972-10-11 Line protector having arrester and fail-safe circuit bypassing the arrester Expired - Lifetime US3755715A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US29657872A 1972-10-11 1972-10-11

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US (1) US3755715A (en。)
JP (1) JPS4968239A (en。)
AU (1) AU475799B2 (en。)
BR (1) BR7307674D0 (en。)
CA (1) CA967233A (en。)
DE (1) DE2339564A1 (en。)
FR (1) FR2203196B1 (en。)
IT (1) IT990019B (en。)

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886411A (en) * 1974-02-04 1975-05-27 Reliable Electric Co Line protector having gas tube surge arrestor
US3993933A (en) * 1975-02-20 1976-11-23 Ceac Of Illinois, Inc. Electric overvoltage gas arrester with metallic shorting mechanism
DE2633160A1 (de) * 1975-07-28 1977-02-17 Reliable Electric Co Leitungsschutzvorrichtung fuer eine fernmeldeeinrichtung
DE2602569A1 (de) * 1976-01-23 1977-07-28 Siemens Ag Ueberspannungs-knopfableiter
US4132915A (en) * 1977-01-14 1979-01-02 Joslyn Mfg. And Supply Co. Spark gap protector
US4158869A (en) * 1977-08-19 1979-06-19 Reliable Electric Company Line protector
US4208694A (en) * 1978-10-11 1980-06-17 Reliable Electric Company Line protector
US4241374A (en) * 1979-01-29 1980-12-23 Reliable Electric Company Surge voltage arrester with ventsafe feature
US4249224A (en) * 1979-03-07 1981-02-03 Reliable Electric Company Surge voltage arrester with fail-safe feature
US4275432A (en) * 1978-02-16 1981-06-23 Tii Corporation Thermal switch short circuiting device for arrester systems
EP0044894A1 (en) * 1980-07-30 1982-02-03 Reliance Electric Company Surge voltage arrester with ventsafe feature
US4319300A (en) * 1979-11-13 1982-03-09 Tii Industries, Inc. Surge arrester assembly
US4320435A (en) * 1979-03-06 1982-03-16 Tii Industries, Inc. Surge arrester assembly
US4321649A (en) * 1979-07-05 1982-03-23 Reliable Electric Company Surge voltage arrester with ventsafe feature
US4327393A (en) * 1980-01-07 1982-04-27 Northern Telecom, Inc. Protector module base assembly with an external spark gap
US4405967A (en) * 1981-12-04 1983-09-20 Northern Telecom Inc. Gas tube overvoltage protector with back-up gap
EP0037222B1 (en) * 1980-03-27 1984-04-25 Reliance Electric Company Line protector for a communications circuit
US4463403A (en) * 1982-09-27 1984-07-31 Porta Systems Corp. Plug type gas tube replacement module
US4502087A (en) * 1982-07-20 1985-02-26 Gte Products Corporation Surge voltage arrester assembly
US4603368A (en) * 1983-08-01 1986-07-29 Tii Industries, Inc. Voltage arrester with auxiliary air gap
US4707762A (en) * 1986-05-13 1987-11-17 Nerses Nick Yapoujian Surge protection device for gas tube
US4736269A (en) * 1986-12-19 1988-04-05 American Telephone And Telegraph Company, At&T Technologies, Inc. Voltage surge limiter with grounding assembly
US5029302A (en) * 1990-08-29 1991-07-02 Illinois Tool Works Fail safe gas tube
DE4318994A1 (de) * 1993-05-26 1994-12-08 Siemens Ag Gasgefüllter Überspannungsableiter
US5410443A (en) * 1993-02-26 1995-04-25 Oneac Corporation Telephone line overvoltage protection
US5569972A (en) * 1993-08-31 1996-10-29 Siemens Aktiengesellschaft Gas-filled lightning arrester having copper electrodes
US5751533A (en) * 1996-02-01 1998-05-12 Reltec Corporation Cup and diode assembly for overvoltage protectors and communications lines
US5854732A (en) * 1997-03-10 1998-12-29 Argus Photonics Group, Inc. High voltage arcing switch initiated by a disruption of the electric field
US5910877A (en) * 1997-11-17 1999-06-08 Reltec Corporation Line protector for a communication circuit
US5991136A (en) * 1997-12-01 1999-11-23 Reltec Corporation Protector unit
DE19701816B4 (de) * 1996-01-12 2005-06-16 Epcos Ag Gasgefüllte Entladungsstrecke und Überspannungsableiter
US20070253136A1 (en) * 2004-08-06 2007-11-01 Huber + Suhner Ag Automatically Quenching Surge Arrester Arrangement and Use of Such a Surge Arrester Arrangement
WO2012130477A3 (de) * 2011-04-01 2013-01-24 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzeinrichtung
WO2015023452A1 (en) * 2013-08-13 2015-02-19 Cooper Technologies Company Arrester bypass devices
US20180076617A1 (en) * 2016-09-13 2018-03-15 Abb Schweiz Ag Protection of a surge arrester with a better protection against failure from thermal overload in case of a temporary overvoltage in an electrical grid line
WO2019220171A1 (en) 2018-05-14 2019-11-21 Saltek S.R.O. Voltage limiter with a short-circuiting device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7420109U (de) * 1974-06-12 1976-09-16 Krone Gmbh, 1000 Berlin Ueberspannungsableitervorrichtung fuer trennleisten
DE2740694C2 (de) * 1977-01-14 1984-01-26 Joslyn Mfg. and Supply Co., 60606 Chicago, Ill. Überspannungsableiter
US4142220A (en) * 1977-09-26 1979-02-27 Reliable Electric Company Multi arc gap surge arrester

Citations (3)

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US1200796A (en) * 1915-09-03 1916-10-10 Western Electric Co Power-limiting device.
US1201646A (en) * 1916-04-21 1916-10-17 Gen Electric Protective device.
US3651380A (en) * 1970-03-16 1972-03-21 Siemens Ag Gas discharge over voltage arrester filled with a noble gas

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1200796A (en) * 1915-09-03 1916-10-10 Western Electric Co Power-limiting device.
US1201646A (en) * 1916-04-21 1916-10-17 Gen Electric Protective device.
US3651380A (en) * 1970-03-16 1972-03-21 Siemens Ag Gas discharge over voltage arrester filled with a noble gas

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886411A (en) * 1974-02-04 1975-05-27 Reliable Electric Co Line protector having gas tube surge arrestor
US3993933A (en) * 1975-02-20 1976-11-23 Ceac Of Illinois, Inc. Electric overvoltage gas arrester with metallic shorting mechanism
DE2633160A1 (de) * 1975-07-28 1977-02-17 Reliable Electric Co Leitungsschutzvorrichtung fuer eine fernmeldeeinrichtung
DE2602569A1 (de) * 1976-01-23 1977-07-28 Siemens Ag Ueberspannungs-knopfableiter
US4132915A (en) * 1977-01-14 1979-01-02 Joslyn Mfg. And Supply Co. Spark gap protector
US4158869A (en) * 1977-08-19 1979-06-19 Reliable Electric Company Line protector
US4275432A (en) * 1978-02-16 1981-06-23 Tii Corporation Thermal switch short circuiting device for arrester systems
US4208694A (en) * 1978-10-11 1980-06-17 Reliable Electric Company Line protector
US4241374A (en) * 1979-01-29 1980-12-23 Reliable Electric Company Surge voltage arrester with ventsafe feature
US4320435A (en) * 1979-03-06 1982-03-16 Tii Industries, Inc. Surge arrester assembly
US4249224A (en) * 1979-03-07 1981-02-03 Reliable Electric Company Surge voltage arrester with fail-safe feature
US4321649A (en) * 1979-07-05 1982-03-23 Reliable Electric Company Surge voltage arrester with ventsafe feature
US4319300A (en) * 1979-11-13 1982-03-09 Tii Industries, Inc. Surge arrester assembly
US4327393A (en) * 1980-01-07 1982-04-27 Northern Telecom, Inc. Protector module base assembly with an external spark gap
EP0037222B1 (en) * 1980-03-27 1984-04-25 Reliance Electric Company Line protector for a communications circuit
EP0044894A1 (en) * 1980-07-30 1982-02-03 Reliance Electric Company Surge voltage arrester with ventsafe feature
US4405967A (en) * 1981-12-04 1983-09-20 Northern Telecom Inc. Gas tube overvoltage protector with back-up gap
US4502087A (en) * 1982-07-20 1985-02-26 Gte Products Corporation Surge voltage arrester assembly
US4463403A (en) * 1982-09-27 1984-07-31 Porta Systems Corp. Plug type gas tube replacement module
US4603368A (en) * 1983-08-01 1986-07-29 Tii Industries, Inc. Voltage arrester with auxiliary air gap
US4707762A (en) * 1986-05-13 1987-11-17 Nerses Nick Yapoujian Surge protection device for gas tube
US4736269A (en) * 1986-12-19 1988-04-05 American Telephone And Telegraph Company, At&T Technologies, Inc. Voltage surge limiter with grounding assembly
US5029302A (en) * 1990-08-29 1991-07-02 Illinois Tool Works Fail safe gas tube
US5410443A (en) * 1993-02-26 1995-04-25 Oneac Corporation Telephone line overvoltage protection
DE4318994A1 (de) * 1993-05-26 1994-12-08 Siemens Ag Gasgefüllter Überspannungsableiter
US5671114A (en) * 1993-05-26 1997-09-23 Siemens Aktiengesellschaft Gas-filled overvoltage diverter
US5569972A (en) * 1993-08-31 1996-10-29 Siemens Aktiengesellschaft Gas-filled lightning arrester having copper electrodes
DE19701816B4 (de) * 1996-01-12 2005-06-16 Epcos Ag Gasgefüllte Entladungsstrecke und Überspannungsableiter
US5751533A (en) * 1996-02-01 1998-05-12 Reltec Corporation Cup and diode assembly for overvoltage protectors and communications lines
US5854732A (en) * 1997-03-10 1998-12-29 Argus Photonics Group, Inc. High voltage arcing switch initiated by a disruption of the electric field
US5910877A (en) * 1997-11-17 1999-06-08 Reltec Corporation Line protector for a communication circuit
US5991136A (en) * 1997-12-01 1999-11-23 Reltec Corporation Protector unit
US20070253136A1 (en) * 2004-08-06 2007-11-01 Huber + Suhner Ag Automatically Quenching Surge Arrester Arrangement and Use of Such a Surge Arrester Arrangement
US7567417B2 (en) 2004-08-06 2009-07-28 Huber+Suhner Ag Automatically quenching surge arrester arrangement and use of such a surge arrester arrangement
WO2012130477A3 (de) * 2011-04-01 2013-01-24 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzeinrichtung
US9088155B2 (en) 2011-04-01 2015-07-21 Phoenix Contact Gmbh & Co., Kg Surge protection device
WO2015023452A1 (en) * 2013-08-13 2015-02-19 Cooper Technologies Company Arrester bypass devices
US9543745B2 (en) 2013-08-13 2017-01-10 Cooper Technologies Company Arrester bypass devices
AU2014306999B2 (en) * 2013-08-13 2017-06-15 Eaton Intelligent Power Limited Arrester bypass devices
US20180076617A1 (en) * 2016-09-13 2018-03-15 Abb Schweiz Ag Protection of a surge arrester with a better protection against failure from thermal overload in case of a temporary overvoltage in an electrical grid line
US11322934B2 (en) * 2016-09-13 2022-05-03 Hitachi Energy Switzerland Ag Protection of a surge arrester with a better protection against failure from thermal overload in case of a temporary overvoltage in an electrical grid line
US11682899B2 (en) 2016-09-13 2023-06-20 Hitachi Energy Switzerland Ag Protection of a surge arrester with a better protection against failure from thermal overload in case of a temporary overvoltage in an electrical grid line
WO2019220171A1 (en) 2018-05-14 2019-11-21 Saltek S.R.O. Voltage limiter with a short-circuiting device

Also Published As

Publication number Publication date
FR2203196B1 (en。) 1979-03-02
FR2203196A1 (en。) 1974-05-10
IT990019B (it) 1975-06-20
JPS4968239A (en。) 1974-07-02
AU475799B2 (en) 1976-09-02
DE2339564A1 (de) 1974-04-18
AU5873673A (en) 1975-02-06
BR7307674D0 (pt) 1974-08-22
CA967233A (en) 1975-05-06

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