EP0303807B1 - High-frequency power switch - Google Patents

High-frequency power switch Download PDF

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Publication number
EP0303807B1
EP0303807B1 EP88110425A EP88110425A EP0303807B1 EP 0303807 B1 EP0303807 B1 EP 0303807B1 EP 88110425 A EP88110425 A EP 88110425A EP 88110425 A EP88110425 A EP 88110425A EP 0303807 B1 EP0303807 B1 EP 0303807B1
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EP
European Patent Office
Prior art keywords
contact
reed contact
reed
connection members
lugs
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.)
Expired - Lifetime
Application number
EP88110425A
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German (de)
French (fr)
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EP0303807A1 (en
Inventor
Herbert Dipl.-Ing Rewitzer
Bernd Dipl.-Ing. Weigenthaler
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.)
Rohde and Schwarz GmbH and Co KG
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Rohde and Schwarz GmbH and Co KG
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Publication of EP0303807A1 publication Critical patent/EP0303807A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/28—Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/10—Auxiliary devices for switching or interrupting
    • H01P1/12—Auxiliary devices for switching or interrupting by mechanical chopper

Definitions

  • the invention relates to a high-frequency circuit breaker according to the preamble of the main claim.
  • a high-frequency circuit breaker of this type is known (DE-U-85 18 732).
  • the control coil is in this case arranged on a coil former made of plastic, on which the shielding housing is placed without a gap.
  • the shielding housing consists of two axially arranged metal tube parts, between which the control coil is arranged and which are closed at the end with corresponding metal covers. This shielding housing is pushed onto a bearing tube in which the glass bulb of the reed contact is inserted.
  • This known high-frequency circuit breaker can switch up to 5A high-frequency currents due to the structure of the reed contact, its high-voltage resistance to ground is due to the narrow structure between the shielding housing of the control coil, which must be operated at ground potential, and the without The distance in this shielded housing fitted reed contact is relatively small and is a maximum of 5KV. This is not sufficient for some purposes, for example in antenna matching devices for high-power transmitters.
  • the shield housing of the control coil surrounds the glass bulb of the reed contact at a distance selected in accordance with the desired high-voltage strength of, for example, 15KV.
  • the reed contact can therefore also be operated, for example, at high-frequency high voltage of 15KV and more with respect to ground.
  • the distance between the reed contact and the surrounding ring surface of the shielding housing can be selected according to the needs of the desired high-voltage strength, the magnetic actuation forces required for the reed contact due to this somewhat larger distance can then be compensated for by appropriate dimensioning of the control coil.
  • the additional compensation feature according to the invention namely to arrange the entry point of the contact lugs of the reed contact shielded within the electrical connection parts of the switch, ensures that this very sensitive point is free of high-voltage fields in reed contacts and therefore also this part of the reed contact Desired high voltage strength of, for example, 15KV or more endures.
  • connection part for the connecting lugs of the reed contact, which also act as electrical shielding.
  • the connecting part could, for example, be designed in the form of a spherical housing, the glass bulb of the reed contact being inserted into the inside of the ball via a corresponding hole to such an extent that the entry point of the connecting lug comes to lie within the ball housing.
  • the electrical connection between the connection lug and the ball housing takes place within the ball housing via corresponding connection lugs, for example by soldering, the resiliently designed connection lugs ensuring that the reed contact can expand thermally.
  • this connecting part consists of two plate-like metal disks arranged one above the other and disc springs arranged between them, since this advantageous development on the one hand causes the sensitive entry point of the reed contact to lie between the metal disks arranged one above the other and is therefore free of high-voltage electrical fields, and the reed contact can be guided away from this connecting part in any radial direction.
  • the combination according to the invention thus creates for the first time a high-frequency circuit breaker which is suitable not only for large currents but also for large voltages of 15KV or more to ground.
  • two or more reed contacts can also be arranged in parallel in a manner known per se between the connection parts which simultaneously act as electrical shielding within the ring opening of the coil housing.
  • two or more circuit breakers according to the invention can also be connected in series, with an additional voltage divider attached above the connecting parts ensuring that each of the reed contacts only has to switch a high voltage component for which the reed contact is designed.
  • connection parts as plate-like metal disks with interposed contact plate springs allows the very simple electrical power management of the high-voltage lines and components in an electrical device, since not only the connecting lugs of the reed contact can be inserted resiliently between the plate springs, but also Corresponding connecting lines with flat connecting lugs are also inserted in any radial direction thereof and can be led away laterally in any direction.
  • a high-frequency circuit breaker according to the invention with, for example, 15KV high-voltage strength can be produced very inexpensively and is considerably cheaper than, for example, known vacuum relays, such as those for higher ones Voltages are partially used. It combines the advantages of vacuum relays (high-voltage capability) with those of reed contacts (short switching times, long service life).
  • the figure shows, partly in section, a high-frequency circuit breaker according to the invention in approximately natural size for approximately 5A switching power and 15KV high-voltage strength.
  • the switch is built on a base plate 1, which is, for example, a direct component of a high-frequency device to be provided with such a switch.
  • base plate 1 which is, for example, a direct component of a high-frequency device to be provided with such a switch.
  • two high-voltage insulators 2 are attached at a distance from one another, the height of which is selected in accordance with the desired high-voltage strength.
  • two plate-like metal disks 3 and 4 are fastened by means of a screw 5, which have plate-spring-like slotted spring elements 6 and 7 on their inside, the ends of the spring legs of which are pressed against one another resiliently with prestress.
  • the metal disks 3 and 4 consist, for example, of silver-plated brass, and the plate springs 6 and 7 attached to them protrude inwards, for example, consist of rhodium-plated copper beryllium.
  • the metal disks 3 and 4 have a bead-like rounded edge 8, as shown in the left part of the figure shown in section.
  • the diameter of the plate-like metal disks 3 and 4 and the mutual spacing of the insulators 2 is selected such that the entry point 12 of the connecting lugs 9 and 10 in the glass bulb 13 of the reed contact within the gap between the with the edge beads 8 provided metal discs 3 and 4 is free of high voltage fields.
  • the control coil 14 for the magnetically actuated reed contact 11 is arranged in a closed metal housing 15, for example made of brass, which is fastened to the base plate 1 and is therefore electrically grounded, so that the control coil 14 can also be operated via a control voltage connected to ground .
  • the shield housing has a through opening 16, around which the coil 14 is wound concentrically.
  • the distance between the glass bulb of the reed contact 11 and the annular inner surface 17 of the housing opening 16 is selected so that the desired dielectric strength of, for example, 15KV is ensured in air between the reed contact and this earthed surface 17.
  • the rounded edge beads 8 of the disks 3 and 4 which come to lie relatively close to the housing 15, ensure that the required dielectric strength is also present between the metal disks and this housing 15 and no high voltage flashovers occur between these parts. Since the contact lugs 9 and 10 of the reed contact 11 are only inserted between the plate springs 6 and 7, a relative displacement of these parts is guaranteed in the event of thermal expansion.
  • connection parts as spring contacts also enables the connections of the switch to the other parts of a high-frequency circuit to be made in a simple manner, as is indicated schematically for a line routing 18, the flat end contact of which is in turn only inserted between the plate springs 6 and 7.
  • the disc springs accessible from all sides, allow any connection parts to be carried away in any radial direction.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Push-Button Switches (AREA)

Description

Die Erfindung betrifft einen Hochfrequenz-Leistungsschalter laut Oberbegriff des Hauptanspruches.The invention relates to a high-frequency circuit breaker according to the preamble of the main claim.

Ein Hochfrequenz-Leistungsschalter dieser Art ist bekannt (DE-U-85 18 732). Die Steuerspule ist hierbei auf einem Spulenkörper aus Kunststoff angeordnet, auf den unmittelbar das Abschirmgehäuse ohne Abstand aufgesetzt ist. Das Abschirmgehäuse besteht aus zwei axial angeordneten Rohrteilen aus Metall, zwischen denen die Steuerspule angeordnet ist und die stirnseitig mit entsprechenden Metalldeckeln verschlossen sind. Dieses Abschirmgehäuse ist auf ein Lagerrohr aufgeschoben, in welchem der Glaskolben des Reed-Kontaktes eingesetzt ist. Dieser bekannte Hochfrequenz-Leistungsschalter kann bedingt durch den Aufbau des Reed-Kontaktes beispielsweise bis zu 5A Hochfrequenzströme schalten, seine Hochspannungsfestigkeit gegenüber Masse ist wegen des engen Aufbaus zwischen dem an Massepotential liegenden Abschirmgehäuse der Steuerspule, die ja bei Massepotential betrieben werden muss, und des ohne Abstand in diesem Abschirmgehäuse eingepassten Reed-Kontaktes relativ gering und beträgt höchstens 5KV. Dies ist für manche Zwecke, beispielsweise in Antennenanpassgeräten für Hochfrequenzsender grosser Leistung nicht ausreichend.A high-frequency circuit breaker of this type is known (DE-U-85 18 732). The control coil is in this case arranged on a coil former made of plastic, on which the shielding housing is placed without a gap. The shielding housing consists of two axially arranged metal tube parts, between which the control coil is arranged and which are closed at the end with corresponding metal covers. This shielding housing is pushed onto a bearing tube in which the glass bulb of the reed contact is inserted. This known high-frequency circuit breaker can switch up to 5A high-frequency currents due to the structure of the reed contact, its high-voltage resistance to ground is due to the narrow structure between the shielding housing of the control coil, which must be operated at ground potential, and the without The distance in this shielded housing fitted reed contact is relatively small and is a maximum of 5KV. This is not sufficient for some purposes, for example in antenna matching devices for high-power transmitters.

Es ist Aufgabe der Erfindung, einen Hochfrequenz-Leistungsschalter mit Reed-Kontakten zu schaffen, der eine wesentlich höhere Spannungsfestigkeit gegenüber Masse besitzt.It is an object of the invention to provide a high-frequency circuit breaker with reed contacts which has a significantly higher dielectric strength with respect to ground.

Diese Aufgabe wird ausgehend von einem Hochfrequenz-Leistungsschalter laut Oberbegriff des Hauptanspruches durch dessen kennzeichnende Merkmale gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.This object is achieved on the basis of a high-frequency circuit breaker according to the preamble of the main claim by its characteristic features. Advantageous further developments result from the subclaims.

Bei dem erfindungsgemäßen Hochfrequenz-Leistungsschalter umgibt das Abschirmgehäuse der Steuerspule den Glaskolben des Reed-Kontaktes in einem entsprechend der gewünschten Hochspannungsfestigkeit von beispielsweise 15KV gewählten Abstand. Zwischen der Innenringfläche der Ringöffnung des Spulengehäuses und dem konzentrisch darinnen im Abstand gehaltenen Glaskolben des Reed-Kontaktes ist nur der ideale Isolator Luft vorhanden und der Reed-Kontakt kann daher beispielsweise auch noch bei Hochfrequenz-Hochspannung von 15KV und mehr gegenüber Masse betrieben werden. Der Abstand zwischen dem Reed-Kontakt und der diesen umgebenden Ringfläche des Abschirmgehäuses kann nach den Bedürfnissen der gewünschten Hochspannungsfestigkeit gewählt werden, die durch diesen etwas größeren Abstand bedingten erforderlichen magnetischen Betätigungskräfte für den Reed-Kontakt können dann durch entsprechende Dimensionierung der Steuerspule ausgeglichen werden. Durch das weitere erfindungsgemäße Kompensationsmerkmal, nämlich die Eintrittsstelle der Kontaktfahnen des Reed-Kontaktes innerhalb der elektrischen Anschlußteile des Schalters abgeschirmt anzuordnen, wird gewährleistet, daß diese bei Reed-Kontakten sehr empfindliche Stelle frei von Hochspannungsfeldern ist und daher auch dieser Teil des Reed-Kontaktes die gewünschte Hochspannungsfestigkeit von beispielsweise 15KV oder mehr aushält. Für die Realisierung dieser gleichzeitig als elektrische Abschirmung wirkenden Anschlußteile für die Anschlußfahnen des Reed-Kontaktes gibt es verschiedene Möglichkeiten. Das Anschlußteil könnte beispielsweise in Form eines kugelförmigen Gehäuses ausgebildet sein, wobei der Glaskolben des Reed-Kontaktes über ein entsprechendes Loch soweit bis in das Kugelinnere eingesteckt ist, daß die Eintrittsstelle der Anschlußfahne innerhalb des Kugelgehäuses zu liegen kommt. Die elektrische Verbindung zwischen der Anschlußfahne und dem Kugelgehäuse erfolgt innerhalb des Kugelgehäuses über entsprechende Anschlußfahnen beispielsweise durch Löten, wobei über die nachgiebig ausgebildeten Anschlußfahnen dafür gesorgt ist, daß der Reed-Kontakt sich thermisch ausdehnen kann. Als besonders vorteilhaft hat es sich jedoch erwiesen, wenn im Sinne der Unteransprüche dieses Anschlußteil aus zwei übereinander angeordneten tellerartigen Metallscheiben und dazwischen angeordneten Tellerfedern besteht, da durch diese vorteilhafte Weiterbildung einerseits die empfindliche Eintrittsstelle des Reed-Kontaktes zwischen den übereinander angeordneten Metallscheiben zu liegen kommt und daher frei von elektrischen Hochspannungsfeldern ist, wobei der Reed-Kontakt in jeder beliebigen radialen Richtung von diesem Anschlußteil weggeführt werden kann. Außerdem ist kein Lötkontakt mehr nötig, sondern die flache Anschlußfahne des Reed-Kontaktes wird einfach zwischen die gegeneinander vorgespannten Tellerfedern zwischen den beiden Metallscheiben eingesteckt und so zwischen den Tellerfedern federnd gehalten, die Anschlußfahne kann sich bei thermischer Belastung also auch gegenüber den Tellerfedern verschieben. Die abgerundeten Ränder der tellerartigen Metallscheiben gewährleisten, daß auch bei Betrieb des Schalters unter Hochspannung, beispielsweise 15KV oder mehr, kein Funkensprühen zwischen den auf Hochspannungspotential liegenden Metallscheiben und dem unmittelbar daneben angeordneten an Masse liegenden Abschirmgehäuse der Steuerspule entstehen kann. Durch die erfindungsgemäße Kombination wird also erstmals ein Hochfrequenz-Leistungsschalter geschaffen, der nicht nur für große Ströme, sondern auch für große Spannungen von 15KV oder mehr gegen Masse geeignet ist. Für größere Schaltströme können in an sich bekannter Weise auch zwei oder mehr Reed-Kontakte parallel zueinander zwischen den gleichzeitig als elektrische Abschirmung wirkenden Anschlußteilen innerhalb der Ringöffnung des Spulengehäuses angeordnet werden. Wenn außerdem mit einem erfindungsgemäßen Hochfrequenz-Leistungsschalter in Schaltrichtung höhere Spannungen geschaltet werden sollen als für den verwendeten Reed-Kontakt zulässig ist, können auch zwei oder mehrere erfindungsgemäße Leistungsschalter in Reihe geschaltet werden, wobei durch einen zusätzlichen über den Anschlußteilen angebrachten Spannungsteiler dafür gesorgt ist, daß jeder der Reed-Kontakte nur einen Hochspannungsanteil zu schalten hat, für den der Reed-Kontakt ausgelegt ist. Die erfindungsgemäße Ausbildung der Anschlußteile als tellerartige Metallscheiben mit dazwischen angeordneten Kontakt-Tellerfedern ermöglicht bei einem elektrischen Gerät die sehr einfache elektrische Leistungsführung der die Hochspannung führenden Leitungen und Bauelemente, da zwischen den Tellerfedern nicht nur die Anschlußfahnen des Reed-Kontaktes federnd eingesteckt werden können, sondern in beliebiger radialer Richtung davon auch entsprechende Verbindungsleitungen mit flachen Anschlußfahnen eingesteckt und seitlich in beliebiger Richtung weggeführt werden können. Ein erfindungsgemäßer Hochfrequenz-Leistungsschalter mit beispielsweise 15KV Hochspannungsfestigkeit kann sehr preiswert hergestellt werden und ist wesentlich billiger als beispielsweise bekannte Vakuumrelais, wie sie für höhere Spannungen teilweise benutzt werden. Er verbindet die Vorteile von Vakuum-Relais (Hochspannungsfertigkeit) mit denen von Reed-Kontakten (kurze Schaltzeit, lange Lebensdauer).In the high-frequency circuit breaker according to the invention, the shield housing of the control coil surrounds the glass bulb of the reed contact at a distance selected in accordance with the desired high-voltage strength of, for example, 15KV. Between the inner ring surface of the ring opening of the coil housing and the glass bulb of the reed contact, which is concentrically spaced therein, only the ideal air insulator is present, and the reed contact can therefore also be operated, for example, at high-frequency high voltage of 15KV and more with respect to ground. The distance between the reed contact and the surrounding ring surface of the shielding housing can be selected according to the needs of the desired high-voltage strength, the magnetic actuation forces required for the reed contact due to this somewhat larger distance can then be compensated for by appropriate dimensioning of the control coil. The additional compensation feature according to the invention, namely to arrange the entry point of the contact lugs of the reed contact shielded within the electrical connection parts of the switch, ensures that this very sensitive point is free of high-voltage fields in reed contacts and therefore also this part of the reed contact Desired high voltage strength of, for example, 15KV or more endures. There are various possibilities for realizing these connecting parts for the connecting lugs of the reed contact, which also act as electrical shielding. The connecting part could, for example, be designed in the form of a spherical housing, the glass bulb of the reed contact being inserted into the inside of the ball via a corresponding hole to such an extent that the entry point of the connecting lug comes to lie within the ball housing. The electrical connection between the connection lug and the ball housing takes place within the ball housing via corresponding connection lugs, for example by soldering, the resiliently designed connection lugs ensuring that the reed contact can expand thermally. However, it has proven to be particularly advantageous if, in the sense of the subclaims, this connecting part consists of two plate-like metal disks arranged one above the other and disc springs arranged between them, since this advantageous development on the one hand causes the sensitive entry point of the reed contact to lie between the metal disks arranged one above the other and is therefore free of high-voltage electrical fields, and the reed contact can be guided away from this connecting part in any radial direction. In addition, a soldering contact is no longer necessary, but the flat connecting lug of the reed contact is simply inserted between the diaphragm springs biased against one another between the two metal washers and thus held resiliently between the diaphragm springs, so the connecting lug can also shift with respect to the plate springs under thermal load. The rounded edges of the plate-like metal discs ensure that even when the switch is operated under high voltage, for example 15KV or more, there is no sparking between the high voltage potential lying metal disks and the shield housing of the control coil, which is arranged directly adjacent to ground, can arise. The combination according to the invention thus creates for the first time a high-frequency circuit breaker which is suitable not only for large currents but also for large voltages of 15KV or more to ground. For larger switching currents, two or more reed contacts can also be arranged in parallel in a manner known per se between the connection parts which simultaneously act as electrical shielding within the ring opening of the coil housing. If, in addition, higher voltages are to be switched in the switching direction with a high-frequency circuit breaker according to the invention than is permissible for the reed contact used, two or more circuit breakers according to the invention can also be connected in series, with an additional voltage divider attached above the connecting parts ensuring that each of the reed contacts only has to switch a high voltage component for which the reed contact is designed. The inventive design of the connection parts as plate-like metal disks with interposed contact plate springs allows the very simple electrical power management of the high-voltage lines and components in an electrical device, since not only the connecting lugs of the reed contact can be inserted resiliently between the plate springs, but also Corresponding connecting lines with flat connecting lugs are also inserted in any radial direction thereof and can be led away laterally in any direction. A high-frequency circuit breaker according to the invention with, for example, 15KV high-voltage strength can be produced very inexpensively and is considerably cheaper than, for example, known vacuum relays, such as those for higher ones Voltages are partially used. It combines the advantages of vacuum relays (high-voltage capability) with those of reed contacts (short switching times, long service life).

Die Erfindung wird im folgenden anhand einer schematischen Zeichnung an einem Ausführungsbeispiel näher erläutert.The invention is explained below with reference to a schematic drawing of an embodiment.

Die Figur zeigt teilweise im Schnitt einen erfindungsgemäßen Hochfrequenz-Leistungsschalter in etwa natürlicher Größe für etwa 5A Schaltleistung und 15KV Hochspannungsfestigkeit. Der Schalter ist auf einer Grundplatte 1 aufgebaut, die beispielsweise unmittelbar Bestandteil eines mit einem solchen Schalter zu versehenden Hochfrequenzgerätes ist. Auf dieser Grundplatte 1 sind im Abstand voneinander zwei Hochspannungsisolatoren 2 befestigt, deren Höhe entsprechend der gewünschten Hochspannungsfestigkeit gewählt ist. Am oberen Ende dieser Isolatoren 2 sind zwei tellerartige Metallscheiben 3 und 4 über eine Schraube 5 befestigt, die auf ihrer Innenseite tellerfederartige geschlitzte Federelemente 6 und 7 aufweisen, deren Federschenkelenden innen mit Vorspannung federnd aufeinander gepreßt sind. Die Metallscheiben 3 und 4 bestehen beispielsweise aus versilbertem Messing, die daran befestigten nach innen abstehenden Tellerfedern 6 und 7 bestehen beispielsweise aus rhodiniertem Kupfer-Beryllium. Die Metallscheiben 3 und 4 besitzen einen wulstartigen abgerundeten Rand 8, wie dies der linke geschnitten dargestellte Teil der Figur zeigt.The figure shows, partly in section, a high-frequency circuit breaker according to the invention in approximately natural size for approximately 5A switching power and 15KV high-voltage strength. The switch is built on a base plate 1, which is, for example, a direct component of a high-frequency device to be provided with such a switch. On this base plate 1, two high-voltage insulators 2 are attached at a distance from one another, the height of which is selected in accordance with the desired high-voltage strength. At the upper end of these insulators 2, two plate-like metal disks 3 and 4 are fastened by means of a screw 5, which have plate-spring-like slotted spring elements 6 and 7 on their inside, the ends of the spring legs of which are pressed against one another resiliently with prestress. The metal disks 3 and 4 consist, for example, of silver-plated brass, and the plate springs 6 and 7 attached to them protrude inwards, for example, consist of rhodium-plated copper beryllium. The metal disks 3 and 4 have a bead-like rounded edge 8, as shown in the left part of the figure shown in section.

Zwischen die Tellerfedern 6 und 7 sind die flachen Anschlußfahnen 9 und 10 eines Reed-Kontaktes 11 eingesteckt. Der Durchmesser der tellerartigen Metallscheiben 3 und 4 und der gegenseitige Abstand der Isolatoren 2 ist so gewählt, daß die Eintrittsstelle 12 der Anschlußfahnen 9 und 10 in den Glaskolben 13 des Reed-Kontaktes
innerhalb des Spaltes zwischen den mit
den Randwülsten 8 versehenen Metallscheiben 3 und 4 frei von Hochspannungsfeldern liegt. Die Steuerspule 14 für den magnetisch betätigbaren Reed-Kontakt 11 ist in einem geschlossenen Metallgehäuse 15 beispielsweise aus Messing angeordnet, das auf der Grundplatte 1 befestigt und damit elektrisch an Masse liegt, so daß die Steuerspule 14 ebenfalls über eine an Masse liegende Steuerspannung betrieben werden kann. Das Abschirmgehäuse besitzt eine durchgehende Öffnung 16, um welche die Spule 14 konzentrisch gewickelt ist. Der Abstand zwischen dem Glaskolben des Reed-Kontaktes 11 und der ringförmigen Innenfläche 17 der Gehäuseöffnung 16 ist so gewählt, daß zwischen dem Reed-Kontakt und dieser an Masse liegenden Fläche 17 in Luft die gewünschte Spannungsfestigkeit von beispielsweise 15KV gewährleistet ist. Die abgerundeten Randwülste 8 der Scheiben 3 und 4, die ja relativ nahe an dem Gehäuse 15 zu liegen kommen, gewährleisten, daß auch zwischen den Metallscheiben und diesem Gehäuse 15 die erforderliche Spannungsfestigkeit gegeben ist und keine Hochspannungsüberschläge zwischen diesen Teilen auftreten. Da die Kontaktfahnen 9 und 10 des Reed-Kontaktes 11 nur zwischen den Tellerfedern 6 und 7 eingesteckt sind, ist eine Relativverschiebung dieser Teile bei thermischer Ausdehnung gewährleistet. Die Ausbildung der Anschlußteile als Federkontakte ermöglicht auf einfache Weise auch die Herstellung der Anschlüsse des Schalters mit den anderen Teilen einer Hochfrequenzschaltung, wie dies für eine Leitungswegführung 18, deren flacher Endkontakt wiederum nur zwischen die Tellerfedern 6 und 7 eingesteckt ist, schematisch angedeutet ist. Die von allen Seiten zugänglichen Tellerfedern ermöglichen das Wegführen beliebiger Anschlußteile in beliebiger radialer Richtung.Between the plate springs 6 and 7, the flat connecting lugs 9 and 10 of a reed contact 11 are inserted. The diameter of the plate-like metal disks 3 and 4 and the mutual spacing of the insulators 2 is selected such that the entry point 12 of the connecting lugs 9 and 10 in the glass bulb 13 of the reed contact
within the gap between the with
the edge beads 8 provided metal discs 3 and 4 is free of high voltage fields. The control coil 14 for the magnetically actuated reed contact 11 is arranged in a closed metal housing 15, for example made of brass, which is fastened to the base plate 1 and is therefore electrically grounded, so that the control coil 14 can also be operated via a control voltage connected to ground . The shield housing has a through opening 16, around which the coil 14 is wound concentrically. The distance between the glass bulb of the reed contact 11 and the annular inner surface 17 of the housing opening 16 is selected so that the desired dielectric strength of, for example, 15KV is ensured in air between the reed contact and this earthed surface 17. The rounded edge beads 8 of the disks 3 and 4, which come to lie relatively close to the housing 15, ensure that the required dielectric strength is also present between the metal disks and this housing 15 and no high voltage flashovers occur between these parts. Since the contact lugs 9 and 10 of the reed contact 11 are only inserted between the plate springs 6 and 7, a relative displacement of these parts is guaranteed in the event of thermal expansion. The design of the connection parts as spring contacts also enables the connections of the switch to the other parts of a high-frequency circuit to be made in a simple manner, as is indicated schematically for a line routing 18, the flat end contact of which is in turn only inserted between the plate springs 6 and 7. The disc springs, accessible from all sides, allow any connection parts to be carried away in any radial direction.

Claims (3)

  1. High-frequency circuit-breaker with at least one reed contact (11) sealed in a glass tube (13) and with a control coil (14) arranged in a closed electrical shielding enclosure (15) and surrounding said contact,
    characterised in that the connection lugs (9, 10) of the reed contact (11) are joined to connection members (3 to 8) fastened on high-voltage insulators (2), said connection members (3 to 8) being so constructed that the entry points (12) for the contact lugs (9, 10) into the glass tube (13) of the reed contact (11) are electrically shielded from the environment by said connection members (3 to 8), and that the shielding enclosure (15) for the control coil (14) is spaced annually around the reed contact (11) and is arranged at a distance from the connection members (3 to 8).
  2. Circuit-breaker according to claim 1, characterised in that the connection members consist of two plate-type metal discs (3, 4) with rounded bead-like rims (8) and contact diaphragm springs (6, 7) are arranged between said metal discs (3, 4), the connection lugs (9, 10) of the reed contact (11) being inserted between said contact diaphragm springs (6, 7).
  3. Circuit-breaker according to claim 1 or 2, characterized in that the internal diameter of the annular surface (17) of the coil enclosure (15) which surrounds the reed contact (11) is chosen to suit the desired high-voltage strength of the reed contact (11) relative to the earth (1).
EP88110425A 1987-08-20 1988-06-30 High-frequency power switch Expired - Lifetime EP0303807B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3727764A DE3727764C1 (en) 1987-08-20 1987-08-20 High frequency circuit breakers
DE3727764 1987-08-20

Publications (2)

Publication Number Publication Date
EP0303807A1 EP0303807A1 (en) 1989-02-22
EP0303807B1 true EP0303807B1 (en) 1992-03-04

Family

ID=6334119

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88110425A Expired - Lifetime EP0303807B1 (en) 1987-08-20 1988-06-30 High-frequency power switch

Country Status (2)

Country Link
EP (1) EP0303807B1 (en)
DE (2) DE3727764C1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4336929A1 (en) * 1993-10-29 1995-05-04 Deutsche Aerospace High frequency circuit breakers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2138163B1 (en) * 1971-07-30 1973-01-25 Elfein Elektrofeingeraetebau Gmbh, 6000 Frankfurt Inert gas relay and associated housing
US4229700A (en) * 1978-11-27 1980-10-21 Greene Hugh W Buried reed, extra-short pulse width pulser
DE8518732U1 (en) * 1985-06-28 1985-09-26 Elfein Elektrofeingerätebau GmbH, 6000 Frankfurt Reed relay for switching high-frequency currents

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ETZ-B, Band 28, Heft 16 (1976), H. Melcher: "Vakuumrelais" *

Also Published As

Publication number Publication date
EP0303807A1 (en) 1989-02-22
DE3868776D1 (en) 1992-04-09
DE3727764C1 (en) 1988-12-01

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