EP1547190A1 - Dispositif filtre antiparasites et paratonnerre - Google Patents

Dispositif filtre antiparasites et paratonnerre

Info

Publication number
EP1547190A1
EP1547190A1 EP03798845A EP03798845A EP1547190A1 EP 1547190 A1 EP1547190 A1 EP 1547190A1 EP 03798845 A EP03798845 A EP 03798845A EP 03798845 A EP03798845 A EP 03798845A EP 1547190 A1 EP1547190 A1 EP 1547190A1
Authority
EP
European Patent Office
Prior art keywords
gas capsule
housing
voltage
inner conductor
lightning current
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.)
Withdrawn
Application number
EP03798845A
Other languages
German (de)
English (en)
Inventor
Beat Herrmann
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.)
Huber and Suhner AG
Original Assignee
Huber and Suhner AG
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 Huber and Suhner AG filed Critical Huber and Suhner AG
Publication of EP1547190A1 publication Critical patent/EP1547190A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H01R24/42—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency comprising impedance matching means or electrical components, e.g. filters or switches
    • H01R24/48—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency comprising impedance matching means or electrical components, e.g. filters or switches comprising protection devices, e.g. overvoltage protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • 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
    • H01T4/08—Overvoltage arresters using spark gaps structurally associated with protected apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles

Definitions

  • the invention relates to a noise protection filter and lightning current arrester device in a coaxial line for transmitting high-frequency signals, comprising a housing with two connectors, the housing forming an outer conductor connected to ground, an inner conductor guided through the housing, a connection between the inner conductor and the housing for discharging overvoltages and a gas capsule conductor in the connection between inner conductor and housing.
  • Noise protection filter and lightning current arrester devices of this type are known. They are used for assemblies, devices or systems that are connected to cables, e.g. To protect coaxial lines of telecommunications equipment against electromagnetic impulses (EMP), overvoltages and / or lightning currents. Artificial electromagnetic pulses can be generated, for example, by motors, switches, clocked power supplies or also in connection with nuclear events, and pulses of natural origin can arise, for example, as a result of direct or indirect lightning strikes.
  • the known protective circuits are arranged on the input side of the assemblies, devices or systems and / or installed as a component in the coaxial lines.
  • An EMP arrester of this type with a gas capsule or gas discharge surge arrester is known from CH 660 261 A5.
  • This EMP arrester has a housing which serves as an outer conductor and is connected to the ground. At both ends of the housing connectors are arranged, by means of which the housing can be connected to one end of a coaxial cable. By the An inner conductor is guided in the center of the housing, which can also be connected to the coaxial cable in the area of the connector.
  • a housing part is arranged radially to the inner conductor and serves to receive the surge arrester in the form of a gas capsule.
  • This surge arrester is connected on the one hand to the inner conductor and on the other hand to the housing and thus to the ground.
  • Gas capsule surge arresters have the property that their resistance is a few G ⁇ in normal operation. When a predetermined ignition voltage is reached, an electrical flashover occurs and the resistance of the gas capsule jumps to values of less than 1 ⁇ . This condition occurs in the event of a fault, for example if an overvoltage occurs on the antenna side as a result of lightning.
  • the gas capsule surge arrester protects the elements on the device side by dissipating the surge voltage with low resistance to ground. After the overvoltage has subsided, the gas capsule becomes high-resistance and returns to the normal operating state, ie it has an insulating effect again. During the period in which the gas capsule is low-resistance, the so-called arc burning voltage is applied to the gas capsule.
  • This operating voltage is in the range of a few 10 volts.
  • a current flows in the range of a few 10mA, the arc discharge remains and the gas capsule remains in the low-resistance state. This can occur, for example, if an additional control direct current is conducted via the coaxial cable or the noise protection filter and lightning current arrester device or if high-frequency signals with greater power are present.
  • a device with a gas capsule conductor has the considerable disadvantage that after it has responded, for example as a result of a lightning strike, it no longer extinguishes, but remains permanently in the low-resistance state. In this case, in order to restore the normal state, the control direct current must be switched off and / or the high-frequency signal must be interrupted.
  • two gas capsule arresters are connected in series in the connection for discharging overvoltages between the inner conductor and the housing.
  • a contact point is arranged between the two gas capsule arresters and a switching arrangement with an interrupter element for interrupting a current flowing via the gas capsule arrester is arranged between this contact point and the ground.
  • the switching arrangement reduces the voltage at the contact point between the two gas capsule arresters to such an extent that the second one, to ground directed gas capsule, is deleted.
  • the current flows via the first gas capsule and the contact point via the circuit arrangement to ground.
  • the circuit arrangement now enables this current flow to be interrupted, as a result of which the first gas capsule arrester is also extinguished. This means that the two gas capsule arresters can be reset from the conductive to the non-conductive state without the need for control devices voltages or high-frequency currents must be interrupted.
  • the interference protection filter and lightning arrester can be completely automatically reset to the normal state in which there is no conductive connection between the inner conductor and ground.
  • the two gas capsule arresters can be reset from the conductive to the non-conductive state in a very short time, so that the device is immediately ready for operation again after a fault.
  • the switching arrangement has a resistance element connected to the contact point, a voltage-limiting element connected in series with this resistance element and a coil of a switching relay also connected in series with the resistance element, the voltage-limiting element and the coil of the switching relay in parallel are switched.
  • the resistance element which is connected directly to the contact point between the two gas capsule arresters, ensures that when an overvoltage occurs in the first phase, the overvoltage is not discharged to ground via the switching arrangement, but the two gas capsule arresters are ignited one after the other and the overvoltage , or the overcurrent in a first phase can be discharged directly to ground via the gas capsule arrester.
  • a particularly suitable resistance element is, for example, an inductor.
  • this current also flows from the contact point via the resistance element, e.g. in the form of an inductor and the voltage-limiting element to the mass.
  • a diode or a voltage-dependent resistor (VDR), for example, is suitable as the voltage-limiting element.
  • the voltage-limiting element for example in the form of a diode, is used to protect the inductance and the coil of the switching relay from undesirable interference and to reduce the voltage below the arc voltage of the gas capsule.
  • the current also flows from a branch point after the resistance element via the coil of the switching relay.
  • This switching relay is part of an interrupter element which is used to interrupt the the gas capsule discharge current is used.
  • the interrupter element is advantageously designed as an interrupter switch and installed in the connecting line after the resistance element.
  • This circuit breaker is connected to the coil of the switching relay and is actuated by it.
  • the circuit breaker is installed in the connecting line between the resistance element and the branch point.
  • the two gas capsule arresters connected in series are fired in succession as a result of the rapid rise in voltage and form a conductive connection between the inner conductor and the housing or the ground.
  • the conductive state of the two gas capsule arresters there is, for example, an operating voltage of 10 volts at the contact point between the two gas capsule arresters and a voltage of, for example, 20 volts in front of the first gas capsule. This applies if two identical gas capsule arresters are used and these gas capsule arresters each have a burning or arc voltage of 10 volts in the conductive state.
  • the voltage falls below the operating voltage of the gas capsule arrester and these go out or switch from the conductive to the non-conductive state. However, if there is still a voltage on the device after the overvoltage is no longer present, which is higher than the operating voltage of the gas capsule arresters, these remain in the conductive state. If the remaining current is the result of a direct control current applied to the device, this current now also flows through the resistance element, for example an inductor, and via the voltage-limiting element, for example a diode, to ground.
  • the series connected inductance and the diode are chosen so that the voltage at the contact point between the two gas capsule arresters falls below the operating voltage, e.g. B.
  • the switching relay actuates the interrupter switch and interrupts the connecting line between the resistance element and the branch point or the ground. As a result, the current which flows through the first gas capsule arrester is also interrupted, and this is also extinguished, ie reset to the non-conductive state.
  • the arrangement of a decoupling line between the inner conductor and the first gas capsule arrester connected to the inner conductor has further advantages. These consist in that the two gas capsule arresters and the switching arrangement are decoupled from high-frequency currents or signals. This decoupling line is tuned to the frequency that is transmitted via the coaxial line. This advantageous arrangement of an additional decoupling line ensures that high-frequency signals with a voltage level above the operating voltage of the gas capsule arrester are not conducted into the area of the switching arrangement.
  • the decoupling line is formed in a manner known per se, for example as described in WO 99/43052 or EP 0 938 166 A1. Suitable decoupling lines are ⁇ / 4 lines or resonance circuits
  • the interrupter element belonging to the switching arrangement in the form of an interrupter switch can also be installed directly in the inner conductor and the interrupter switch is then also directly connected to the coil of the switching relay and is actuated by it.
  • This arrangement is expedient, for example, in the case of communication devices with an antenna and a base station, the circuit breaker being installed in the inner conductor on the device side.
  • control voltages or high-frequency signals with sufficient power that emanate from the base station can be briefly interrupted so that the gas capsules are extinguished.
  • the arrangement of the gas capsule arrester and the switching arrangement is the same as described above.
  • FIG 1 shows a device according to the invention with radio frequency (HF)
  • FIG. 2 shows a simplified equivalent circuit diagram of the device according to FIG. 1
  • FIG. 3 shows a simplified equivalent circuit diagram of a device according to the invention
  • a noise filter and lightning current arrester device is shown, which is suitable as an insertion adapter for a coaxial cable in a device part in a telecommunications device.
  • a housing 1 has a connector 2, 3 at both ends in the direction of a longitudinal axis 18. These connectors 2, 3 serve to connect the ends of coaxial cables to the device.
  • An inner conductor 4 is guided through an inner cavity 19 of the housing 1 and is separated from the housing 1 by insulators 20, 21.
  • the housing 1 has a screw connection 22, which serves to connect the device to a device wall or earth rail.
  • a threaded bore 23 on the housing 1 is used to attach a ground conductor.
  • a through opening 24 is arranged in the housing 1, in which an additional housing 25 is fastened.
  • This additional housing 25 consists of several housing parts 26, 27 and 28, but can also be formed in one piece.
  • the first additional housing part 26 serves to receive a decoupling line in the form of a ⁇ / 4 line 16, which is connected to the inner conductor 4 and branches off from it at approximately a right angle.
  • This ⁇ / 4 line 16 forms a first part of the connection 5 between the inner conductor 4 and the housing 1, which serves to discharge overvoltages.
  • a capacitance 30 and a connecting element 31 are arranged on the end 29 of the ⁇ / 4 line 16 facing away from the inner conductor 4.
  • This connecting element 31 is designed as a holder for two gas capsule diverters 6, 7 and connects them conductively to the ⁇ / 4 line 16.
  • the two gas capsule diverters 6, 7 are connected in series with one another and installed approximately radially in the additional housing part 27.
  • a contact point 8 is formed between the first gas capsule diverter 6 and the second gas capsule diverter 7 arranged in series therewith and the second gas capsule diverter 7 is conductively connected to the housing 1 or to the ground via the screw plug 32.
  • a switching arrangement 9 is connected to the contact point 8 between the two gas capsule arresters 6, 7 by means of the line 33.
  • the switching arrangement 9 is arranged in the interior of the additional housing part 28, the details of this switching arrangement 9 being shown in FIG. 2 and correspondingly described.
  • the decoupling line or ⁇ / 4 line 16 installed in this preferred solution serves to decouple the other arrester elements from the high-frequency signals on the inner conductor 4 in a manner known per se. If an overvoltage occurs, this overvoltage is dissipated to ground via the ⁇ / 4 line 16 and the connecting element 31 via the gas capsule arresters 6 and 7. This type of surge voltage derivation is known per se. With coaxial lines, over which control DC voltages are also transmitted, the voltage of which is higher than the operating voltage of the gas capsule arresters 6, 7, difficulties arise with the known solutions since the gas capsule arresters 6, 7 are no longer reset to the non-conductive state when the Overvoltage subsides.
  • the switching arrangement 9 now serves to first separate the gas capsule arrester 7 and then the gas capsule arrester 6 from the flowing currents and to put them in the non-conductive state.
  • FIG. 2 shows a simplified equivalent circuit diagram for the device according to the invention according to FIG. 1.
  • the housing 1, which forms an outer conductor, and the inner conductor 4 are connected via an connector 34, on the one hand, to an antenna 34 and, on the other hand, by the coaxial lines connected to them connected to a plant part or device 35.
  • a connection 5 is arranged between the inner conductor 4 and the housing 1, which is connected to the ground, which protects the system part or device 35 in the event of a fault and derives corresponding interference voltages or currents.
  • the connection 5 essentially consists of three assemblies.
  • a first one Group comprises the decoupling line or ⁇ / 4 line 16 and the capacitance 30 arranged in series to short-circuit the high-frequency signals on the inner conductor 16 with the ground.
  • the second group is arranged in series with the ⁇ / 4 line 16 and comprises two gas capsule arresters 6 and 7 arranged in series.
  • a contact point 8 is arranged between the first of these gas capsule arresters 6 and the second gas capsule arrester 7, with which the third assembly, the switching arrangement 9 is connected.
  • a resistance element in the form of an inductor 11 is arranged in the line 33, which goes away from the contact point 8, and a voltage-limiting element in the form of a diode 12 in series with this inductor 11, and a coil 13 in parallel with the diode 12 via a branch point 17 of a switching relay.
  • an interrupter element 10 in the form of an interrupter switch 14 is installed in front of the branch point 17. This circuit breaker 14 is actuated by the coil 13. In the normal state, the interrupter switch 14 is closed, ie a current can flow from the contact point 8 via the line 33, the inductance 11, the connecting line 15 and via the branch point 17 via the diode 12 and the coil 13 to ground.
  • the diode 12 is a TVS diode, this diode 12 essentially protecting the coil 13 of the switching relay and being responsible for the voltage at the contact point 8 being drawn below the arc operating voltage of the capsule 7 becomes.
  • the gas capsule arresters 6, 7 can be automatically reset to the non-conductive state after a surge voltage has been discharged, even if there are 4 DC control voltages or high-frequency signals at the coaxial line or the inner conductor, the voltage of which is higher than the operating voltage of the gas capsule arrester 6 and 7.
  • the illustrated interference protection filter and lightning arrester device works in the following way. If, for example, an overvoltage arrives at the connector 2 of the housing 1 as a result of a lightning strike, the se derived via the ⁇ / 4 line 16 in the connection 5. At point A in front of gas capsule arrester 6, the voltage rises very quickly and at approximately 700 volts, this gas capsule arrester 6 ignites. At subsequent point B, ie in front of gas capsule arrester 7, the voltage also rises immediately and gas capsule arrester 7 also ignites. The overvoltage is immediately dissipated to ground via the two conductive gas capsule arresters 6 and 7. During the discharge process, there is a voltage of approx. 20 volts at point A, which corresponds to twice the operating voltage, and approx.
  • the voltage at contact point 8 or point B breaks down to approximately 8 volts, with the result that the second gas capsule arrester 7 goes out and is reset to the non-conductive state.
  • a current also flows in the switching arrangement 9 from the branch point 17 via the coil 13 of the switching relay.
  • This coil 13 has a switching delay of a few milliseconds, for example 3 milliseconds, until the interrupter element 10 or the interrupter switch 14 is actuated. As soon as the interrupter switch 14 is opened, the current flow through the line 33 and thus through the connection 5 is interrupted. As a result, the gas capsule arrester 6 also goes out and is reset to the non-conductive state.
  • connection 5 comprises the two gas capsule arresters 6 and 7 connected in series, which ensure the discharge of overcurrents to ground.
  • the second assembly comprises the elements arranged with the line 33 between the contact point 8 and the ground.
  • a resistance element in the form of an inductor 11 is arranged in the line 33 and a diode 12 in series with it.
  • the coil 13 of a switching relay is arranged parallel to the diode 12.
  • the interrupter element 10 is actuated in the form of an interrupter switch 14 'via this coil 13.
  • This interrupter switch 14 ' is built into the inner conductor 4, it being closed in the normal state. If the two gas capsule arresters 6 and 7 are ignited and the overvoltage is grounded in this arrangement as a result of an overvoltage, the inner conductor 4 must be interrupted briefly in this case after the overvoltage has ceased to exist in order to ensure that the two gas capsule arresters 6, 7 go out to ensure.
  • the switch 14 ' is actuated automatically and this is reset to the closed state immediately after the gas capsule arrester 6 has gone out. These switching operations take place within milliseconds, which is why they are harmless for system operation. Except for the arrangement of the interrupter switch 14 'and the lack of high-frequency decoupling, the function of this embodiment corresponds to that described for FIG. 2.

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

L'invention concerne un dispositif filtre antiparasites et paratonnerre équipé de deux dérivateurs à capsule de gaz (6, 7) montés en série. Un circuit de commutation (9) qui est relié aux dérivateurs à capsule de gaz (6, 7), est réalisé de telle façon qu'en cas dysfonctionement, les dérivateurs à capsule de gaz (6, 7) sont ramenés en toute fiabilité à l'état non conducteur. Cela est également possible lorsqu'une tension continue et/ou des signaux haute fréquence sont appliqués.
EP03798845A 2002-10-02 2003-08-25 Dispositif filtre antiparasites et paratonnerre Withdrawn EP1547190A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH16462002 2002-10-02
CH164602 2002-10-02
PCT/CH2003/000571 WO2004032276A1 (fr) 2002-10-02 2003-08-25 Dispositif filtre antiparasites et paratonnerre

Publications (1)

Publication Number Publication Date
EP1547190A1 true EP1547190A1 (fr) 2005-06-29

Family

ID=32046626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03798845A Withdrawn EP1547190A1 (fr) 2002-10-02 2003-08-25 Dispositif filtre antiparasites et paratonnerre

Country Status (4)

Country Link
US (1) US7196893B2 (fr)
EP (1) EP1547190A1 (fr)
CA (1) CA2499746A1 (fr)
WO (1) WO2004032276A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502004012168D1 (de) 2004-08-06 2011-03-17 Hubert & Suhner Ag Selbsttätig löschende überspannungsableiteranordnung sowie verwendung einer solchen überspannungsableiteranordnung
FR2936910B1 (fr) * 2008-10-07 2012-08-17 Citel Dispositif de protection pour ligne de transmission
US8878602B1 (en) * 2013-03-12 2014-11-04 Amazon Technologies, Inc. Reducing noise effects in an electronic computing device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2032513A (en) * 1935-03-14 1936-03-03 American Telephone & Telegraph Electrical protective system
US2379262A (en) * 1943-03-31 1945-06-26 Bell Telephone Labor Inc Electric control circuit
US2650301A (en) * 1951-03-03 1953-08-25 Edward B Farmer Electric timing device
CH660261A5 (en) * 1982-12-30 1987-03-31 Huber+Suhner Ag EMP suppressor in a coaxial conductor
US4907120A (en) * 1988-12-08 1990-03-06 Reliance Comm/Tec Corporation Line protector for a communications circuit
CH690150A5 (de) * 1994-12-23 2000-05-15 Huber+Suhner Ag EMP-Filter.
DE59804846D1 (de) * 1997-01-27 2002-08-29 Huber & Suhner Ag Herisau EMP-Ableiter
AU740311B2 (en) * 1998-02-17 2001-11-01 Huber & Suhner Ag EMP - charge eliminator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004032276A1 *

Also Published As

Publication number Publication date
US20050286199A1 (en) 2005-12-29
WO2004032276A1 (fr) 2004-04-15
CA2499746A1 (fr) 2004-04-15
US7196893B2 (en) 2007-03-27

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