EP1378925B1 - Hilfseinrichtung zur Öffnungssteuerung eines Schaltgerätes - Google Patents

Hilfseinrichtung zur Öffnungssteuerung eines Schaltgerätes Download PDF

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Publication number
EP1378925B1
EP1378925B1 EP03354048.5A EP03354048A EP1378925B1 EP 1378925 B1 EP1378925 B1 EP 1378925B1 EP 03354048 A EP03354048 A EP 03354048A EP 1378925 B1 EP1378925 B1 EP 1378925B1
Authority
EP
European Patent Office
Prior art keywords
terminals
power supply
voltage
intended
auxiliary device
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
EP03354048.5A
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English (en)
French (fr)
Other versions
EP1378925A1 (de
Inventor
Joel Schneider Electric Industries SAS Fagnoul
Jean-Baptiste Schneider Elec. Ind. SAS Tallier
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.)
Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP1378925A1 publication Critical patent/EP1378925A1/de
Application granted granted Critical
Publication of EP1378925B1 publication Critical patent/EP1378925B1/de
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
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H2083/203—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition with shunt trip circuits, e.g. NC contact in an undervoltage coil circuit
    • 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
    • H01H47/002—Monitoring or fail-safe circuits

Definitions

  • the invention relates to an auxiliary device for controlling the opening of a switchgear, for example of the circuit-breaker or switch type.
  • auxiliary opening control devices are frequently used in conjunction with switchgear, for example of the circuit-breaker or switch type, within the electrical installations. They allow to provide additional safety functions that are not provided in the cut-off device. Thus auxiliaries with minimum or maximum voltage allow to control the opening of the switchgear when the voltage applied to them passes respectively below or above a voltage threshold. Such auxiliary devices serve in particular to perform the safety opening function.
  • FIG. 1-A is schematically shown an auxiliary opening control device operating with a voltage overvoltage relay 1, commonly called release trigger.
  • the auxiliary device comprises two terminals 2 connected to a power supply, at least one pushbutton 10 open in normal use position, and a voltage overvoltage relay 1 which sends a mechanical opening command to a switchgear, not shown. as soon as the voltage applied to its terminals exceeds a predetermined threshold.
  • a voltage overvoltage relay 1 which sends a mechanical opening command to a switchgear, not shown.
  • a voltage overvoltage relay 1 which sends a mechanical opening command to a switchgear, not shown.
  • a voltage overvoltage relay 1 which sends a mechanical opening command to a switchgear, not shown.
  • FIG. 1-B is schematically shown an auxiliary opening control device operating with a relay undervoltage 1, commonly called undervoltage release.
  • the auxiliary device comprises two terminals 2 connected to a power supply, at least a pushbutton 10 closed in the normal use position, and a undervoltage relay 1 which sends an opening command to a switchgear, not shown, as soon as the voltage applied to its terminals becomes lower than a predetermined threshold.
  • the supply voltage is constantly applied to the terminals of the relay 1. If a plurality of push buttons 10 is used, these are connected in series and all closed in the normal use position, so that an action on one pushbuttons 10 suppress the voltage of the power supply across relay 1, which will then control the opening of the switchgear.
  • the document FR-A-2793355 discloses an auxiliary aperture control device according to the preamble of claim 1.
  • auxiliary devices with undervoltage are sensitive to variations in the mains voltage. Indeed, in the case of interruption or voltage drop of the power supply due to a mains voltage drop, the auxiliary device will control the opening of the switchgear. This situation is troublesome when the safety device must not be opened at each disturbance of the electrical network, and poses a problem of continuity of service.
  • the instantaneous undervoltage coils are sometimes replaced by delayed undervoltage coils. However, the delays are of the order of one second and do not allow to guard against cuts that can last several minutes. In addition, delays that are too long do not allow undervoltage coils to be associated with safety opening devices.
  • the invention therefore aims to overcome the drawbacks of the state of the art, so as to provide an auxiliary device for opening control of switchgear, simple and economical construction, ensuring a good continuity of service while improving safety over overvoltage devices.
  • connection terminals short-circuit the tripping means when they are connected by an electrical connection.
  • the auxiliary device comprises a plurality of impedances maintaining an identical potential across the tripping means when the connection terminals are connected by an electrical connection.
  • the auxiliary device comprises a second plurality of power supply terminals intended to be connected to an external power supply.
  • the first and second plurality of power supply terminals are intended to be respectively connected to first and second external power supplies, and have a plurality of impedances maintaining an identical potential across the terminals of the power supply means. tripping when the connection terminals are interconnected by an electrical connection and that the two pluralities of supply terminals are connected to two external power supplies that operate.
  • the plurality or pluralities of supply terminals may optionally be intended to be respectively connected to one or three phase power supplies.
  • an auxiliary device for opening control of a switchgear comprises a plurality of power supply terminals 2 intended to be connected to an external power supply, mechanical triggering means 1, an impedance 4 and terminals connection means 3 intended to be connected through one or a plurality of push buttons 10.
  • the triggering means 1 are able to send a mechanical command to a switchgear, not shown, as soon as a voltage substantially not null is present at their terminals. Only one push button 10 is shown on the Figure 2 , but the device works with any number of push buttons 10 connected in series.
  • the electrical circuit comprising the tripping means 1, the impedance 4 and the connection terminals 3 and supply 2 delivers across the tripping means 1 a zero voltage or close to zero when the connection terminals 3 are connected by an electrical connection, and a substantially non-zero voltage when the power supply terminals 2 are connected to an external power supply that operates and the electrical connection connecting the connection terminals 3 is interrupted.
  • connection terminals 3 are interconnected by one or a plurality of pushbuttons 10 which are all in the closed position.
  • the current then flows between the connection terminals 3 through the push buttons 10 by shorting the tripping means 1.
  • the voltage across the tripping means 1 is zero or very low.
  • a momentary drop in the voltage of the supply circuit will not create a voltage across the tripping means 1 which will not be triggered.
  • the return to normal of the supply circuit voltage also does not require intervention, the auxiliary device according to the invention returning to its mode of operation. current operation as soon as the power supply connected to terminals 2 returns to its nominal voltage. The auxiliary device thus ensures an optimal continuity of service.
  • the impedance 4 is integrated in the device according to the invention so as to be certain that the current flowing through the device will not be too important.
  • the tripping means 1 comprise an electromagnet.
  • the electromagnet is de-energized to allow proper operation with low power.
  • Optional protection means such as diodes may also be added as shown in FIGS. Figures 2-A or 2-B , to reduce AC consumption, or to protect the device in the event of a cabling error.
  • the diodes are particularly adapted to a particular embodiment using a de-energizing electromagnet in the tripping means 1.
  • the rectifying diode 5 is justified by the polarized nature of the electromagnet desensitization, and the diode of freewheel 6 improves the operation of the device and taking into account the inductive nature of the electromagnet.
  • the Figure 2-B is a variant of the figure 2-A , comprising additional protection means 7 which protect the device in case of bad wiring, in particular if the power supply is connected to the connection terminals 3.
  • the auxiliary device according to the invention can easily be mounted downstream of the controlled switchgear, while this requires a complex additional device for a lack of voltage trigger as shown in Figure in. Indeed, in the absence of power supply, the undervoltage relay will send a permanent trip command. It is therefore necessary to supply the relay undervoltage to remove the trip order to be able to reset the device. This is why the undervoltage release can not be placed downstream of the switchgear unless an additional device is used to temporarily supply the undervoltage relay in order to be able to switch on the auxiliary device. On the contrary, the auxiliary device according to the invention does not send a permanent trigger command if it is not powered. Therefore, a re-engagement is possible without the device is fed beforehand. The auxiliary device can be placed downstream of the switchgear without the need for additional temporary power supply devices.
  • the Figure 3 represents another device according to the invention for using a single or dual power supply.
  • the device of the Figure 3 has a first plurality of power supply terminals 2 for connection to a first power supply, and a second plurality of power supply terminals 12 for connection to a second power supply, and a plurality of impedances 4.
  • Terminals 2 and 12 can be connected to a single power supply.
  • the system has an operation equivalent to that of the auxiliary device represented in FIG. figure 2 , but the operating principle differs slightly in that the one or more pushbuttons 10 do not short circuit trigger 1.
  • the plurality of impedances 4 is specially chosen so that in current operation it maintain an identical potential across the tripping means 1 when the connection terminals 3 are connected by an electrical connection. Any actuation of the or a push button 10 interrupts the electrical connection between the connection terminals 3 and causes the sending of a mechanical command by the triggering means 1, a voltage appearing at their terminals because of the imbalance that is created .
  • the auxiliary device according to the invention shown in figure 3 can also be connected to two separate power sources. This redundancy of the power supply provides greater security compared to a single-power mode, since it makes it possible to activate the tripping means 1 in the event of a fault on one of the supply circuits, while a single power system becomes inoperative in the event of failure of the single power supply circuit.
  • the two external power supplies 2 and 12 operate, the plurality of impedances 4 maintaining an identical potential across the tripping means 1 when the connection terminals 3 are connected by an electrical connection. say when the pushbutton or buttons are in the closed position. Thus, there is no voltage across the tripping means.
  • the actuation of the or a push button 10 or a failure of one of the supply circuits causes an imbalance of potentials and reveals a voltage across the tripping means 1, which are then triggered and send a command to the switchgear, not shown.
  • the auxiliary device according to the invention shown in figure 3 also makes it easy to switch from a simple power mode to a dual power mode (and vice versa), depending on the different security options chosen, without changing auxiliary device.
  • auxiliary devices operating with single-phase power supplies are shown.
  • the figures 4 and 5 are examples of auxiliary devices according to the invention, operating respectively with a single and a double three-phase power supply.
  • the number of supply terminals 2 and 12 differs from the auxiliary devices shown on the figures 2 and 3 but the operating principles remain the same.
  • FIG. 5-A a device according to the invention corresponding to that shown in FIG. figure 3-A , but working with three-phase power supplies.
  • the two feed lines that are crossed correspond to the same phase.
  • the relay 1 is triggered and sends an opening command signal.

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  • Keying Circuit Devices (AREA)

Claims (5)

  1. Hilfseinrichtung zur Öffnungssteuerung, die dazu bestimmt ist, die Öffnung eines Schaltgerätes zu steuern, umfassend
    - eine Mehrzahl von Stromversorgungsklemmen (2), die dazu bestimmt sind, an eine erste externe Stromversorgung angeschlossen zu werden,
    - Anschlussklemmen (3), die dazu bestimmt sind, durch mindestens eine Drucktaste (10) miteinander verbunden zu werden,
    - Auslösemittel (1), die geeignet sind, einen mechanischen Befehl zu senden, und
    - mindestens eine Impedanz (4),
    - die Auslösemittel (1) senden einen mechanischen Befehl zu dem Schaltgerät, wenn eine Spannung, die im Wesentlichen nicht null ist, an ihren Klemmen anliegt,
    - der elektrische Schaltkreis, der die Auslösemittel (1), die Impedanz oder die Impedanzen (4) und die Anschluss- (3) und Stromversorgungsklemmen (2) aufweist, gibt an die Klemmen der Auslösemittel (1) Folgendes ab:
    - eine Spannung, die null oder fast null ist, wenn die Anschlussklemmen (3) durch eine elektrische Verbindung miteinander verbunden sind, und
    - eine Spannung, die im Wesentlichen nicht null ist, wenn die Stromversorgungsklemmen (2) an eine externe Stromversorgung angeschlossen sind, die in Betrieb ist, und die elektrische Verbindung, die die Anschlussklemmen (3) verbindet, unterbrochen ist,
    dadurch gekennzeichnet, dass
    die Anschlussklemmen (3) die Auslösemittel (1) kurzschließen, wenn sie durch eine elektrische Verbindung miteinander verbunden sind.
  2. Hilfseinrichtung zur Öffnungssteuerung nach Anspruch 1, dadurch gekennzeichnet, dass sie mehrere Impedanzen (4) aufweist, die ein identisches Potential an den zwei Klemmen der Auslösemittel (1) halten, wenn die Anschlussklemmen (3) durch eine elektrische Verbindung miteinander verbunden sind.
  3. Hilfseinrichtung zur Öffnungssteuerung nach Anspruch 1, ferner umfassend eine zweite Mehrzahl von Stromversorgungsklemmen (12), die dazu bestimmt sind, an eine externe Stromversorgung angeschlossen zu werden.
  4. Hilfseinrichtung zur Öffnungssteuerung nach Anspruch 3, dadurch gekennzeichnet, dass die erste und zweite Mehrzahl von Stromversorgungsklemmen (2, 12) dazu bestimmt sind, jeweils an eine erste und eine zweite Stromversorgung angeschlossen zu werden, die voneinander verschieden sind, wobei die Mehrzahl von Impedanzen (4) ein identisches Potential an den Klemmen der Auslösemittel (1) halten, wenn die Anschlussklemmen (3) durch eine elektrische Verbindung miteinander verbunden sind, und dass die beiden Mehrzahlen von Stromversorgungsklemmen (2, 12) an zwei externe Stromversorgungen angeschlossen sind, die in Betrieb sind.
  5. Hilfseinrichtung zur Öffnungssteuerung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Mehrzahl(en) von Stromversorgungsklemmen (2, 12) dazu bestimmt sind, jeweils an eine oder mehrere dreiphasige Stromversorgungen angeschlossen zu werden.
EP03354048.5A 2002-07-03 2003-06-02 Hilfseinrichtung zur Öffnungssteuerung eines Schaltgerätes Expired - Lifetime EP1378925B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0208308 2002-07-03
FR0208308A FR2842020B1 (fr) 2002-07-03 2002-07-03 Dispositif auxiliaire de commande d'ouverture d'un appareillage de coupure

Publications (2)

Publication Number Publication Date
EP1378925A1 EP1378925A1 (de) 2004-01-07
EP1378925B1 true EP1378925B1 (de) 2016-03-30

Family

ID=27589628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03354048.5A Expired - Lifetime EP1378925B1 (de) 2002-07-03 2003-06-02 Hilfseinrichtung zur Öffnungssteuerung eines Schaltgerätes

Country Status (4)

Country Link
EP (1) EP1378925B1 (de)
ES (1) ES2569055T3 (de)
FR (1) FR2842020B1 (de)
NO (1) NO324223B1 (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1353016A (fr) * 1963-01-11 1964-02-21 Forges Ateliers Const Electr Résistances de shuntage pour dispositifs de sécurité
FR2793355B1 (fr) * 1999-05-06 2001-06-15 Schneider Electric Ind Sa Dispositif de protection a commande d'ouverture de securite

Also Published As

Publication number Publication date
ES2569055T3 (es) 2016-05-06
NO20032866D0 (no) 2003-06-20
EP1378925A1 (de) 2004-01-07
NO20032866L (no) 2004-01-05
FR2842020B1 (fr) 2004-08-13
FR2842020A1 (fr) 2004-01-09
NO324223B1 (no) 2007-09-10

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