EP0466977B1 - Dispositif commutateur pour commuter des charges importantes - Google Patents

Dispositif commutateur pour commuter des charges importantes Download PDF

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Publication number
EP0466977B1
EP0466977B1 EP90124630A EP90124630A EP0466977B1 EP 0466977 B1 EP0466977 B1 EP 0466977B1 EP 90124630 A EP90124630 A EP 90124630A EP 90124630 A EP90124630 A EP 90124630A EP 0466977 B1 EP0466977 B1 EP 0466977B1
Authority
EP
European Patent Office
Prior art keywords
relay
contacts
circuit
switching
parallel
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
EP90124630A
Other languages
German (de)
English (en)
Other versions
EP0466977A2 (fr
EP0466977A3 (en
Inventor
Richard Siepmann
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 AG
Siemens Corp
Original Assignee
Siemens AG
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 AG, Siemens Corp filed Critical Siemens AG
Publication of EP0466977A2 publication Critical patent/EP0466977A2/fr
Publication of EP0466977A3 publication Critical patent/EP0466977A3/de
Application granted granted Critical
Publication of EP0466977B1 publication Critical patent/EP0466977B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/001—Functional circuits, e.g. logic, sequencing, interlocking circuits

Definitions

  • the invention relates to a circuit arrangement for switching high loads with electromagnetic relays.
  • bridge contacts with erosion-proof contact material are often necessary.
  • these contact materials often have undesirably high, fluctuating contact resistances given the contact forces customary in relays.
  • such a circuit brings additional contact uncertainty because of the multiple contact resistance.
  • relays with a forward contact for switching such loads (e.g. DE-B-1 175 807, DE-A-33 10 458)
  • an earlier-closing and later-opening tungsten contact taking over the switching process and a silver contact in the switched on state ensures safe contact.
  • Such lead contacts require special production for the relays in question with a correspondingly increased outlay in the processing of different contact materials on common contact springs and a correspondingly complex adjustment for the chronological sequence of the switching.
  • the control of the contact distances and the contact forces in such relays is also problematic, especially when erosion occurs.
  • the object of the invention is to provide a circuit arrangement which can be switched with a simple structure, high loads using series-produced relays, both the avoidance of burn-up and welding when switching itself and a good contact transition in the switched-on state are ensured.
  • the circuit arrangement according to the invention instead of a known complex lead contact in a relay, two standard relays with correspondingly different contacts are used and coordinated with one another with simple circuit means so that the relay with the erosion-resistant contacts takes over the switching on and off, while a second relay with good ones Contact transition properties when switched on takes over the majority of the load current.
  • the first relay has sweat and erosion-resistant single or bridge contacts made of common materials for this purpose, e.g. B. AgSnO2, W or AgCdO, while the second relay has single or double contacts from also known materials with low volume resistance, for example silver or silver-gold alloys.
  • the field windings of the two relays are connected in series, and a diode is connected in parallel to each winding via a capacitor such that the diode on the first relay blocks when switched on and the diode on the second relay is continuous when switched on .
  • the excitation windings be designed for about half the operating voltage because of the series connection, the desired switching sequence of the two relays being ensured with the two diodes and the two capacitors.
  • a first resistor is expediently connected in parallel with the diode of the first relay and a second resistor in parallel with the capacitor of the second relay. Since the first operating voltage is also present at the first relay when it is switched on, it can also have a response value that is higher than half the operating voltage. Relays with higher response values can generate increased contact forces, which can be used to advantage here.
  • the circuit arrangement of Figure 1 shows a first relay A and a second relay B, which are connected in series in an excitation circuit, an operating voltage + U can be connected to the excitation windings via a switch contact k.
  • a diode D1 and a capacitor C1 are connected in series with the winding of the relay A, while a capacitor C2 and a diode D2 are connected in parallel with the winding of the relay B.
  • the diodes D1 and D2 are polarized so that when the operating voltage is applied to the series connection of the relays, the diode D1 is initially blocked, while the diode D2 is conductive.
  • a resistor R1 is also connected in parallel with the diode D1, while a resistor R2 is connected in parallel with the capacitor C2.
  • the contact pairs a1 and a2 of relay A are as a bridge contact connected in series in the load circuit of a load resistor RL.
  • the two contact pairs b1 and b2 of relay B are also located in this load
  • the capacitor C1 charges during operation via the resistor R1. If the operating voltage is now switched off, the diode D2 blocks, while the diode D1 conducts, so that the relay B drops immediately, but the relay A only drops after the capacitor C1 has discharged. The capacitor C2 is then discharged via the resistor R2.
  • FIG. 2 shows the timing of the switching process described above over a time axis t.
  • Curve a shows the state of the switch contact k (0 or 1).
  • Curve b shows the curve of the excitation voltage U A at relay A, curve c the corresponding voltage curve U B at relay B.
  • Curves d and e show the corresponding switching state (0 or 1) of the associated contacts a1, a2 or b1 and b2. It can be seen that at time t1, relay A with contacts a1 and a2 switches through, but relay B with contacts b1 and b2 only delays at time t2. When switching off at time t3, relay B initially drops out, causing contacts b1 and b2 to open. Only then does relay A drop out with a delay and open contacts a1 and a2 (time t4).

Landscapes

  • Relay Circuits (AREA)
  • Electronic Switches (AREA)
  • Keying Circuit Devices (AREA)

Claims (6)

  1. Dispositif commutateur pour commuter des charges importantes avec relais électromagnétiques, qui présente les particularités suivantes:
    a) un premier relais (A) à relâchement retardé et un second relais (B) à attraction retardée sont reliés en commun par leurs enroulements dans un circuit d'excitation ;
    b) les dispositifs de retardement des deux relais sont dimensionnés de telle sorte que le premier relais (A), lors de l'application d'une tension d'excitation (+U) au circuit d'excitation, soit enclenché avant le second relais (B) et, lors d'une interruption de la tension d'excitation, soit désactivé après le second relais et
    c) au moins une paire de contacts (a1, a2) du premier relais (A), de grande résistance au soudage et au grillage, est connectée dans le circuit de courant de charge en parallèle à au moins une paire de contacts (b1, b2) du second relais (B), de faible résistance de transition et de grande capacité de sollicitation électrique.
  2. Dispositif commutateur selon la revendication 1, caractérisé en ce que les enroulements d'excitation des deux relais (A, B) sont connectés en série et en ce qu'une diode respective (D1, D2) est connectée en parallèle à chaque enroulement, par l'intermédiaire d'un condensateur (C1, C2) de telle sorte que la diode (D1) associée au premier relais (A) soit bloquée lors d'un enclenchement et que la diode (D2) associée au second relais (B) soit conductrice lors d'un enclenchement.
  3. Dispositif commutateur selon la revendication 2, caractérisé en ce qu'une première résistance (R1) est reliée en parallèle à la diode (D1) du premier relais (A) et qu'une seconde résistance (R2) est reliée en parallèle au condensateur (C2) du second relais (B).
  4. Dispositif commutateur selon la revendication 2 ou 3, caractérisé en ce que le premier relais (A) a une tension de réaction plus grande que le second.
  5. Dispositif commutateur selon l'une des revendications 1 à 4, caractérisé en ce que deux paires de contacts (a1, a2) du premier relais sont connectées en série dans le circuit de courant de charge.
  6. Dispositif commutateur selon l'une des revendications 1 à 5, caractérisé en ce que deux paires de contacts (b1, b2) du second relais (B) sont connectées en parallèle dans le circuit de courant de charge.
EP90124630A 1990-07-18 1990-12-18 Dispositif commutateur pour commuter des charges importantes Expired - Lifetime EP0466977B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4022893A DE4022893C1 (fr) 1990-07-18 1990-07-18
DE4022893 1990-07-18

Publications (3)

Publication Number Publication Date
EP0466977A2 EP0466977A2 (fr) 1992-01-22
EP0466977A3 EP0466977A3 (en) 1992-11-25
EP0466977B1 true EP0466977B1 (fr) 1995-07-19

Family

ID=6410548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90124630A Expired - Lifetime EP0466977B1 (fr) 1990-07-18 1990-12-18 Dispositif commutateur pour commuter des charges importantes

Country Status (3)

Country Link
EP (1) EP0466977B1 (fr)
AT (1) ATE125391T1 (fr)
DE (2) DE4022893C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3087957B1 (fr) * 2018-10-31 2021-07-16 Schneider Electric Ind Sas Dispositif d'interconnexion d'appareils de coupure d'un courant electrique
DE102022207772A1 (de) * 2022-07-28 2024-02-08 Robert Bosch Gesellschaft mit beschränkter Haftung MEMS-Relais mit Sicherheitsfunktion

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1175807B (de) * 1959-04-10 1964-08-13 Schaltbau Gmbh Elektrische Zwillingskontaktanordnung mit zeit-lich nacheinanderschaltenden Kontaktpaaren
DE2808942A1 (de) * 1978-03-02 1979-09-06 Tekade Felten & Guilleaume Schaltungsanordnung zum umschalten von relais
DE3310458A1 (de) * 1983-03-23 1984-10-04 Standard Elektrik Lorenz Ag, 7000 Stuttgart Elektrische schaltvorrichtung
US4584621A (en) * 1984-01-23 1986-04-22 Yang Tai Her Two or more than two poles switch means having unequal contact gaps and turn off capacities
GB2170654A (en) * 1985-02-01 1986-08-06 Greenwood Systems Limited Switching arrangement

Also Published As

Publication number Publication date
DE4022893C1 (fr) 1991-08-29
EP0466977A2 (fr) 1992-01-22
ATE125391T1 (de) 1995-08-15
EP0466977A3 (en) 1992-11-25
DE59009423D1 (de) 1995-08-24

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