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DE968382C - Arrangement to protect contacts for roller regulators operated in bridge or voltage divider circuit - Google Patents

Arrangement to protect contacts for roller regulators operated in bridge or voltage divider circuit

Info

Publication number
DE968382C
DE968382C DES24532A DES0024532A DE968382C DE 968382 C DE968382 C DE 968382C DE S24532 A DES24532 A DE S24532A DE S0024532 A DES0024532 A DE S0024532A DE 968382 C DE968382 C DE 968382C
Authority
DE
Germany
Prior art keywords
contacts
arrangement
bridge
resistors
divider circuit
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
Application number
DES24532A
Other languages
German (de)
Inventor
Franz Ludwig V Bernus
Dr Johannes Goerner
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.)
Siemens Corp
Original Assignee
Siemens Corp
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 Siemens Corp filed Critical Siemens Corp
Priority to DES24532A priority Critical patent/DE968382C/en
Application granted granted Critical
Publication of DE968382C publication Critical patent/DE968382C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02Details
    • H01H33/04Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16Impedances connected with contacts
    • H01H33/161Variable impedances
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/14Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
    • H02P9/16Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field due to variation of ohmic resistance in field circuit, using resistances switched in or out of circuit step by step
    • H02P9/18Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field due to variation of ohmic resistance in field circuit, using resistances switched in or out of circuit step by step the switching being caused by a servomotor, measuring instrument, or relay

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Adjustable Resistors (AREA)

Description

(WiGBl. S. 175)(WiGBl. P. 175)

AUSGEGEBEN AM 20. MÄRZ 1958ISSUED MARCH 20, 1958

S 24532 VIIIb j2i cS 24532 VIIIb j2i c

Bei den Wälzreglern oder ähnlichen mit einer Kontaktbahn versehenen Reglern sind die einzelnen Regelkontakte der Kontaktbahn mit Anzapfstellen eines Widerstandes verbunden. Häufig werden solche Regler in Brücken- oder Spannungsteilerschaltung betrieben; dann ist der Widerstand an eine Spannung angeschlossen, von der durch den beweglichen Kontakt jeweils ein gewisser Anteil abgegriffen wird. Da solche Regler verhältnismäßig oft und rasch betätigt werden, sind namentlich im Arbeitsbereich die Kontakte einem gewissen Verschleiß unterworfen. Dadurch werden der sichere Stromübergang und die leichte Beweglichkeit des Reglers, zu dessen Antrieb oft nur eine kleine Kraft zur Verfügung steht, gestört.In the case of roller regulators or similar regulators provided with a contact track, the individual control contacts are the contact track connected to taps of a resistor. Such regulators are often used operated in bridge or voltage divider circuit; then the resistor is connected to a voltage, a certain proportion of which is tapped by the movable contact. Because such Controllers are operated relatively often and quickly, the contacts are in particular in the work area subject to a certain amount of wear and tear. This will ensure the safe current transfer and the easy Mobility of the controller, which is often only driven by a small amount of force, is disturbed.

Der Anordnung gemäß der Erfindung liegt die Aufgabe zugrunde, die Kontaktbelastung für in Brückenoder Spannungsteilerschaltung betriebene Wälzregler herabzusetzen und damit eine weitgehende Kontaktschonung zu erreichen. Erfindungsgemäß wird dies dadurch erreicht, daß Wälzkontakte und Anzapfstellen des Teilerwiderstandes ständig über jeder Schaltstufe fest zugeordnete Widerstände miteinander verbunden sind.The arrangement according to the invention is based on the object of reducing the contact load for in bridges or Voltage divider circuit operated rolling regulator and thus an extensive contact protection to reach. According to the invention this is achieved in that rolling contacts and tapping points of the divider resistance permanently connected to each other via each switching stage permanently assigned resistors are.

Die Einschaltung von Widerständen zur Herabsetzung der Schaltleistung ist z. B. bei Sprungschaltern für Stufentransformatoren bekannt. Hier handelt es sich aber nicht um die Erzielung einer gleichmäßigen Stromverteilung bei Überbrückung zweier Kontakte, sondern nur um die Herabsetzung der Schaltleistung. Zudem werden die Widerstände bei Sprungschaltern immer nur kurzzeitig für die Dauer des Umschaltvorganges eingeschaltet, während die erfindungsgemäßThe inclusion of resistors to reduce the switching capacity is z. B. with snap switches known for step transformers. But here it is not a question of achieving a uniform one Power distribution when bridging two contacts, but only to reduce the switching capacity. In addition, the resistors in snap switches are only briefly used for the duration of the switching process switched on while the invention

709 905/46709 905/46

eingeschalteten Widerstände entsprechend der Regelgeschwindigkeit unter Umständen einer Dauerbelastung unterworfen werden.switched on resistors according to the control speed under certain circumstances a permanent load be subjected.

Zur Verwirklichung der Erfindung genügt es unter Umständen, wenn sich die Widerstände auf den Arbeitsbereich des Reglers beschränken. Für die seltener betätigten, gegen die Enden der Kontaktbahn zu liegenden Kontakte können sie unter Umständen weggelassen werden.To implement the invention, it may be sufficient if the resistors are on the Restrict the working range of the controller. For the less frequently actuated, against the ends of the contact track They can be omitted under certain circumstances.

ίο Es empfiehlt sich, den Verbindungswiderstand einen Widerstandswert von der ein- bis zehnfachen Größe der benachbarten Widerstandsstufe des Teilerwiderstandes zu geben. Am besten legt man die Widerstände so aus, daß wenigstens im Arbeitsbereich die Spannungsdifferenz zwischen sich trennenden Kontakten unterhalb der Feinwanderungsgrenze des Kontaktwerkstoffes liegt. Diese hegt bei Silberkontakten etwa bei 0,37 V, bei Kupferkontakten bei etwa 0,43 V. Durch eine solche Maßnahme werden die Kontakte wesentlich geschont.ίο It is recommended to use the connection resistance Resistance value from one to ten times the size of the neighboring resistance level of the divider resistor admit. It is best to lay out the resistors in such a way that at least in the work area the Voltage difference between separating contacts below the fine migration limit of the contact material lies. This is around 0.37 V for silver contacts and around 0.43 V for copper contacts. Such a measure significantly protects the contacts.

Die Erfindung wird an Hand der Zeichnung näher erläutert: An Anzapfstellen eines an Spannung liegenden Teilwiderstandes 1 (Fig. 1) sind die einzelnen Regelkontakte 2 einer Kontaktbahn 3 über Widerstände 4 angeschlossen. Durch 5 ist ein Wälzbügel angedeutet, der durch Wälzbewegung mit den einzelnen Regelkontakten in Verbindung gebracht werden kann. Wären die Widerstände 4 nicht vorhanden, dann würde sich eine Stromverteilung gemäß Fig. 2 ergeben, und es würde sich über benachbarte, durch den Wälzkontakt 5 überbrückte Kontakte 21, 22 fast der gesamte, durch strichpunktierte Linie angedeutete Teilerstrom 6 schließen. Durch den Kontakt 21 fließt außerdem noch in der Hauptsache der Arbeitsstrom 7 des Reglers. Infolge der starken Strombelastung durch den Strom 6 werden beim Schalten die Kontakte stark beansprucht.The invention is explained in more detail with reference to the drawing: At taps of a voltage-connected Partial resistance 1 (Fig. 1) are the individual control contacts 2 of a contact track 3 via resistors 4 connected. By 5 a rolling bracket is indicated, which by rolling motion with the individual Regular contacts can be associated. If the resistors 4 were not present, then would a current distribution as shown in FIG. 2 would result, and it would be via adjacent ones through the rolling contact 5 bridged contacts 21, 22 almost the entire, indicated by dash-dotted line Close divider flow 6. The main current 7 also flows through the contact 21 of the controller. As a result of the strong current load from the current 6, the contacts become strong when switching claimed.

Dieser Nachteil tritt bei der Anordnung nach der Erfindung nicht auf, wie dies Fig. 3 zeigt. Da hier die Kontakte 21,22 durch Widerstände 4mit Anzapfstellen des Teilerwiderstandes 1 verbunden sind, nimmt der Teilerstrom 6 trotz der Überbrückung der Kontakte 21, 22 in der Hauptsache seinen Weg durch den Widerstand i, und nur der wesentlich schwächere Arbeitsstrom 7 des Reglers geht durch die Kontakte hindurch. Man kann nun die Widerstände ohne weiteres so abgleichen, daß die Kontaktspannung unterhalb der Feinwanderungsgrenze der Kontakte 2 und5 liegt. Dann bleiben die Kontaktflächen glatt, der Regler kann leicht betätigt werden und hat eine große Lebensdauer.This disadvantage does not occur in the arrangement according to the invention, as FIG. 3 shows. Since here the Contacts 21, 22 through resistors 4 with taps of the divider resistor 1 are connected, the divider current 6 takes despite the bridging of the contacts 21, 22 mainly makes its way through the resistor i, and only the much weaker working current 7 of the controller goes through the contacts. You can now adjust the resistances without further ado, that the contact voltage is below the fine migration limit of contacts 2 and 5. then the contact surfaces remain smooth, the regulator is easy to operate and has a long service life.

Claims (3)

PATENTANSPRÜCHE:PATENT CLAIMS: ι. Anordnung zur Kontaktschonung für in Brücken- oder Spannungsteilerschaltung betriebene Wälzregler, dadurch gekennzeichnet, daß Wälzkontakte (2) und Anzapfstellen des Teilerwiderstandes (1) ständig über jeder Schaltstufe fest zugeordnete Widerstände (4) miteinander verbunden sind.ι. Arrangement for contact protection for operated in bridge or voltage divider circuit Rolling regulator, characterized in that rolling contacts (2) and taps of the divider resistor (1) Resistors (4) that are permanently assigned to each switching stage are connected to one another are. 2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß ein Verbindungswiderstand einen Widerstandswert von dem ein- bis zehnfachen Wert der benachbarten Stufe des Teilerwiderstandes aufweist.2. Arrangement according to claim 1, characterized in that that a connection resistor has a resistance value from one to ten times the value of the adjacent stage of the divider resistor having. 3. Anordnung nach Anspruch 1 und 2, gekennzeichnet durch eine solche Auslegung der Widerstände (1, 4), daß wenigstens im Arbeitsbereich die Spannungsdifferenz zwischen sich trennenden Kontakten (2, 5) unterhalb der Feinwanderungsgrenze des Kontaktwerkstoffes liegt.3. Arrangement according to claim 1 and 2, characterized by such a design of the resistors (1, 4) that at least in the working range the voltage difference between separating contacts (2, 5) lies below the fine migration limit of the contact material. In Betracht gezogene Druckschriften:Considered publications: Bödefeld-Sequenz, »Elektrische Maschinen«·, 1944, S. 88;
deutsche Patentschriften Nr. 172 687, 741 834.
Bödefeld sequence, »Electrical Machines« ·, 1944, p. 88;
German patents No. 172 687, 741 834.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings © 709 905/46 3.58© 709 905/46 3.58
DES24532A 1951-08-23 1951-08-23 Arrangement to protect contacts for roller regulators operated in bridge or voltage divider circuit Expired DE968382C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES24532A DE968382C (en) 1951-08-23 1951-08-23 Arrangement to protect contacts for roller regulators operated in bridge or voltage divider circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES24532A DE968382C (en) 1951-08-23 1951-08-23 Arrangement to protect contacts for roller regulators operated in bridge or voltage divider circuit

Publications (1)

Publication Number Publication Date
DE968382C true DE968382C (en) 1958-03-20

Family

ID=7477902

Family Applications (1)

Application Number Title Priority Date Filing Date
DES24532A Expired DE968382C (en) 1951-08-23 1951-08-23 Arrangement to protect contacts for roller regulators operated in bridge or voltage divider circuit

Country Status (1)

Country Link
DE (1) DE968382C (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE172687C (en) * 1905-08-14
DE741834C (en) * 1939-05-16 1943-11-18 Aeg Fine-level resistance regulator in which the width of the fixed contacts is greater than their mutual distance, especially collector regulators for rail vehicles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE172687C (en) * 1905-08-14
DE741834C (en) * 1939-05-16 1943-11-18 Aeg Fine-level resistance regulator in which the width of the fixed contacts is greater than their mutual distance, especially collector regulators for rail vehicles

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