EP0883149A2 - Elektrische Anordnung mit Betätigungsvorrichtung für einen Lastschalter, mit Fehlfunktonanzeigeeinrichtung - Google Patents

Elektrische Anordnung mit Betätigungsvorrichtung für einen Lastschalter, mit Fehlfunktonanzeigeeinrichtung Download PDF

Info

Publication number
EP0883149A2
EP0883149A2 EP98201703A EP98201703A EP0883149A2 EP 0883149 A2 EP0883149 A2 EP 0883149A2 EP 98201703 A EP98201703 A EP 98201703A EP 98201703 A EP98201703 A EP 98201703A EP 0883149 A2 EP0883149 A2 EP 0883149A2
Authority
EP
European Patent Office
Prior art keywords
pin
electrical assembly
actuating device
opening position
operating
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.)
Granted
Application number
EP98201703A
Other languages
English (en)
French (fr)
Other versions
EP0883149B1 (de
EP0883149A3 (de
Inventor
Fabrizio Fabrizi
Marcello Re
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.)
BTicino SpA
Original Assignee
BTicino SpA
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 BTicino SpA filed Critical BTicino SpA
Publication of EP0883149A2 publication Critical patent/EP0883149A2/de
Publication of EP0883149A3 publication Critical patent/EP0883149A3/de
Application granted granted Critical
Publication of EP0883149B1 publication Critical patent/EP0883149B1/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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/66—Power reset mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • H01H71/462—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts housed in a separate casing, juxtaposed to and having the same general contour as the main casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • H01H2071/467—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts with history indication, e.g. of trip and/or kind of trip, number of short circuits etc.
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/66—Power reset mechanisms
    • H01H71/70—Power reset mechanisms actuated by electric motor

Definitions

  • the present invention relates to an electrical assembly comprising a circuit breaker and a device for actuating the circuit breaker, and in particular to an electrical assembly according to the preamble of Claim 1.
  • a circuit breaker is an electrical apparatus which is able to interrupt or establish a flow of current in a circuit by means of special separable contacts; in particular, the contacts are pressed together with a suitable force in a closed circuit breaker condition, while they are separated by an isolating distance in an open circuit breaker condition.
  • Actuating devices are commonly used, for example in control systems for industrial plants, to perform switching operations (opening and closing) of the circuit breaker using energy other than manual energy.
  • actuating devices use an electric motor to move an operating lever of the circuit breaker from an opening position into a closing position, and vice versa, in response to a suitable external command signal.
  • the circuit breaker includes moreover a safety mechanism which allows the circuit breaker to be opened automatically in a situation where there is a malfunction (or fault) of the circuit in which the circuit breaker is arranged.
  • a drawback of the known electrical assemblies consists in the fact that the electric circuit breaker opened by this safety mechanism following a malfunction may be closed inadvertently in a manual manner by an operator.
  • the known electrical assemblies in fact do not allow one to distinguish whether the circuit breaker has been opened voluntarily following a normal switching operation (either manually or by means of the actuating device) or whether it has been opened non-voluntarily on account of a malfunction.
  • the closing of the circuit breaker in this situation results in operation of the circuit under incorrect conditions, with a high risk of damage to the circuit breaker and the devices connected.
  • the object of the present invention is to overcome the aforementioned drawbacks.
  • an electrical assembly as described in Claim 1 is provided.
  • the electrical assembly according to the present invention allows an operator to be warned of the fact that a malfunction situation has occurred. In this way the circuit breaker can be locked in the opening condition, avoiding the danger of incorrect operations; this also prevents the circuit breaker from being accidentally closed by the actuating device owing to a spurious command signal.
  • an electrical assembly 100 comprising an actuating device 103 for a circuit breaker 106 is illustrated.
  • the actuating device 103 is used as a servomotor in a closed-chain control system, even though its use in different applications is not excluded - for example for simple remote operation of the circuit breaker 106.
  • the circuit breaker 106 comprises an insulating body 107 on the side walls of which one or more pairs of terminals 109 for connecting the circuit breaker 106 to corresponding pairs of electric wires of an external circuit (not shown in the figure) are provided.
  • An operating element 110 typically consisting of a lever, is movable rotatably about an axis 112 between a position 110' (shown in continuous lines) and a position 110'' (shown in broken lines) for opening and closing the circuit breaker 106, respectively.
  • the insulating body 107 has, housed inside it, an opening mechanism (not shown in the figure) which, when the operating lever from the closing position 110'' reaches an intermediate release position 110''' (shown in broken lines), triggers movement of the operating lever towards the opening position 110'; this mechanism imparts a sudden acceleration to the operating lever 110, pushing it with force towards the opening position 110', so as to avoid the formation of an electric arc between the contacts of the circuit breaker which are about to separate.
  • an opening mechanism (not shown in the figure) which, when the operating lever from the closing position 110'' reaches an intermediate release position 110''' (shown in broken lines), triggers movement of the operating lever towards the opening position 110'; this mechanism imparts a sudden acceleration to the operating lever 110, pushing it with force towards the opening position 110', so as to avoid the formation of an electric arc between the contacts of the circuit breaker which are about to separate.
  • a slot 113 which allows access to a hole 114 is formed on a front wall of the insulating body 107.
  • the hole 114 is formed (perpendicular to the front wall of the insulating body 107) in an internal element connected to the operating lever 110.
  • the hole 114 moves correspondingly from an opening position 114' (shown in continuous lines) to a closing position 114'' (shown in broken lines);
  • the hole 114 does not move until the operating lever reaches the release position 110''', following which it moves correspondingly from the closing position 114'' to the opening position 114'.
  • An additional slot 115 (with a slightly curved shape) is provided on a rear surface of the insulating body 107; this slot 115 allows access to a groove 116 (coaxial with the hole 114) having a shape slightly elongated in the direction of the slot 115.
  • the groove 116 is formed (perpendicular to the rear wall of the insulating body 107) in an additional internal element movable integrally with the element in which the hole 114 is formed, so as to move the groove 116 between an opening position 116' (shown in continuous lines) and a closing position 116'' (shown in broken lines) in a similar manner to that described above.
  • a suitable operating element (not shown in the figure), consisting for example of a pin, is inserted into the hole 114.
  • a remote protection device (not shown in the figure) acts on this pin so as to displace the hole 114 from the closing position 114'' into the opening position 114'. This displacement causes movement of the operating lever 110 towards the release position 110''', causing opening of the circuit breaker 106.
  • the present invention may also be realized using different equivalent safety elements.
  • the actuating device 103 comprises an insulating body 117 which is provided on one of its lateral flanks with a terminal strip 118 for connecting the actuating device 103 to an electrical power supply network.
  • the terminal strip 118 is also used for applying to the actuating device 103 suitable (opening and closing) command signals which are supplied by a remote control device (not shown in the figure).
  • the actuating device 103 is provided with a bar 154 (or other equivalent driving means) which is parallel to the axis of rotation 112 and on the bottom surface of which a longitudinal channel 157 is formed, into which channel the operating lever 110 of the circuit breaker 106 is inserted.
  • the operating lever 110 is slidable inside the channel 157 in the direction of the axis 112 so as to allow assembly of the electrical unit 100, while the operating lever 110 and the driving bar 154 move locked together in rotation about the axis 112.
  • a slot 159 facing the slot 115 formed on the rear wall of the circuit breaker 106.
  • a pin 160 which is inserted into the groove 116 projects from the slot 159, perpendicularly with respect to the insulating body 117; the pin 160 is displaced by the groove 116 (as described in detail below) so as to connect the safety mechanism of the circuit breaker 106 to the actuating device 103.
  • the present invention may, however, also be realized using different equivalent connecting means.
  • the circuit breaker 106 and the actuating device 103 are connected together, along each side surface of the electrical assembly 100, by means of an L-shaped element 166 (only one of which is shown in the figure).
  • the L-shaped element 166 terminates on the smaller arm of the "L” in a tractional hook 169 which engages in a cavity 172 formed on the rear surface of the circuit breaker 106.
  • the L-shaped element 166 is housed in a matching seat 173 formed in the actuating device 103 along a front vertical edge and is fixed by means of a screw 181 which is screwed into a metal plate (not shown in the figure).
  • a bar 202 parallel to the wall 158 of the actuating device 103 extends perpendicularly from the driving bar 154 of the actuating device 103 (connected in a manner known per se to an electric motor, not shown in the figure).
  • a flange 204 projects upwards from the bar 202; a curved circular-shaped projection 205 with its centre on the axis of rotation 112 extends, in relief, from the rear wall of the bar 202 and the flange 204.
  • the plate 206 has, at each of its corners, a tongue 207,208,210 which is bent towards the inside of the actuating device 103.
  • An L-shaped element 212 is also pivotably mounted on the pin 160 at a common end of its arms. The bigger arm and the smaller arm of the L-shaped element 212 rest in abutment, respectively, against a rib 213 (formed on the wall 158) and against the tongue 208 of the plate 206; an additional rib 215 is formed on the wall 158 above the rib 213.
  • the free end of the smaller arm of the L-shaped element 212 is provided with a turret piece 214 (parallel to the pin 160) which rests in abutment against a bar 216 pivotably mounted at one of its free ends on the pin 160; the other end of the bar 216 is movable rotatably about a pivot 218 parallel to the pin 160.
  • a flat spring 220 (or other equivalent resilient means) is wound around the pivot 218 and a parallel pin 222; the spring 220 acts with one of its ends against the tongue 210 of the plate 206 and with its other end on the turret piece 214 of the L-shaped element 212 so as to keep the lever mechanism consisting of the elements 206, 212 and 216 in the position shown in the figure.
  • a microswitch 224 which is electrically connected to the terminal strip (118 in Fig. 1) by means of one or more suitable wires 226, is arranged in the vicinity of the lever mechanism 206,212,216.
  • a flat spring 228 (or other equivalent resilient means) is associated with the microswitch 224 and in the rest condition rests in abutment with one of its free ends against the rib 213, so that the microswitch 224 is open.
  • the actuating device 103 is in the condition shown in the figure, with the driving bar 154 and the pin 160 in a position, indicated respectively by 154'' and 160'', corresponding to the closing position of the circuit breaker. If the actuating device 103 receives an opening command signal, the driving element 154 starts to rotate in the clockwise direction about the axis 112. As described above, until the driving element 154 reaches a position corresponding to the release position of the operating lever (110''' in Fig. 1), the pin 160 does not move, so that the lever mechanism 206,212,216 remains in the position shown in the figure.
  • the projection 205 comes into contact with the tongue 207 of the plate 206, causing the plate 206 to rotate in an anti-clockwise direction about the pin 160.
  • the tongue 208 of the plate 206 transmits this movement also to the L-shaped element 212, so that the smaller arm provided with the turret piece 214 moves away from the bar 216 against the action of the spring 220.
  • the driving element 154 reaches a position corresponding to the release position of the operating lever, the pin 160 starts to move towards the right, causing rotation of the lever mechanism 206,212,216 in a clockwise direction about the pivot 218.
  • the free end of the bigger arm of the L-shaped element 212 is located above the rib 215 which acts as a guide, preventing this end from coming into contact with the spring 228.
  • the projection 205 then disengages from the tongue 207 of the plate 206 and the driving element 154 and the pin 160 complete their movement.
  • the driving element 154 and the pin 160 reach a position, indicated respectively by 154' and 160', corresponding to the opening position of the circuit breaker; it should be noted that the pin 160 does not reach the top end of the slot 159, owing to the elongated shape of the groove 116. If, in the condition shown in the figure, the actuating device 103 receives a closing command signal, the driving element 154 starts to rotate in an anti-clockwise direction about the axis 112; the pin 160 moves correspondingly towards the left, causing rotation of the lever mechanism 206,212,216 in an anti-clockwise direction about the pivot 218.
  • the plate 206 When the projection 205 comes into contact with the tongue 207, the plate 206 is made to rotate in a clockwise direction about the pin 160 in opposition to the spring 220. The tongue 207 then disengages from the projection 205, the free end of the bigger arm of the L-shaped element is freed from the rib 215 and the spring 220 brings the lever mechanism 206,212,216 back into the position illustrated in Fig. 2a.
  • Closing of the microswitch 224 produces a malfunction signal which is transmitted (by means of the wires 226) to a remote location.
  • This signal activates a warning device, for example of the luminous type, so as to inform an operator of the malfunction situation in the circuit in which the electrical assembly is arranged; typically, the operator locks the driving element 154 of the actuating device 103 in the opening position 154', for example by means of a padlock (not shown in the figure), so as to prevent the circuit breaker from being accidentally closed.
  • the present invention may, however, also be realized using different systems for transmission of the malfunction signal (for example using radio waves), with a luminous signalling device incorporated directly in the actuating device or using other equivalent signalling means.
  • the driving element 154 is released and a closing command signal is sent to the actuating device 103 (or the driving element 154 is displaced manually towards the closing position 154''). In this case, the actuating device 103 returns, in a manner similar to that described above, into the condition shown in Fig. 2a.
  • the lever mechanism described above is particularly compact, reliable and effective. Moreover, it is extremely simple and may be mass-produced at a low cost, so that it does not increase the final cost of the entire actuating device.
  • the present invention may, however, be constructed also with a driven member different from the lever mechanism described above, with other cam systems, or with equivalent means for activation of the microswitch.

Landscapes

  • Breakers (AREA)
  • Keying Circuit Devices (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Transmitters (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Push-Button Switches (AREA)
  • Relay Circuits (AREA)
  • Selective Calling Equipment (AREA)
EP98201703A 1997-05-22 1998-05-21 Elektrische Anordnung mit Betätigungsvorrichtung für einen Lastschalter, mit Fehlfunktonanzeigeeinrichtung Expired - Lifetime EP0883149B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI971208 1997-05-22
IT97MI001208A IT1291980B1 (it) 1997-05-22 1997-05-22 Gruppo elettrico con dispositivo di azionamento per un interruttore comprendente mezzi di segnalazione di malfunzionamento

Publications (3)

Publication Number Publication Date
EP0883149A2 true EP0883149A2 (de) 1998-12-09
EP0883149A3 EP0883149A3 (de) 1999-04-14
EP0883149B1 EP0883149B1 (de) 2006-04-12

Family

ID=11377200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98201703A Expired - Lifetime EP0883149B1 (de) 1997-05-22 1998-05-21 Elektrische Anordnung mit Betätigungsvorrichtung für einen Lastschalter, mit Fehlfunktonanzeigeeinrichtung

Country Status (6)

Country Link
EP (1) EP0883149B1 (de)
AT (1) ATE323325T1 (de)
DE (1) DE69834153T2 (de)
ES (1) ES2257793T3 (de)
IT (1) IT1291980B1 (de)
PT (1) PT883149E (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2817079A1 (fr) * 2000-11-21 2002-05-24 Hager Electro Dispositif de rearmement automatique pour appareillage modulaire de protection a commander
FR2817078A1 (fr) * 2000-11-21 2002-05-24 Hager Electro Dispositif de commande a distance pour appareillage modulaire de protection
EP1429361A2 (de) * 2002-12-14 2004-06-16 LG Industrial Systems Co., Ltd. Phasenmangel Anzeigegerät für einen Schutzschalter mit gegossenem Gehäuse
EP1441376A1 (de) * 2003-01-22 2004-07-28 Bticino S.P.A. Elektrisches Gerät mit fernbedienbarem Schalter
DE10324209B4 (de) * 2002-05-30 2016-11-24 Hager-Electro S.A.S. Automatische Reaktivierungs- und Fernsteuerungsvorrichtung für zu steuernde modulare Schutzgeräte

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3806686A (en) * 1972-12-11 1974-04-23 Ite Imperial Corp Actuator for circuit breaker alarm switch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3806686A (en) * 1972-12-11 1974-04-23 Ite Imperial Corp Actuator for circuit breaker alarm switch

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2817079A1 (fr) * 2000-11-21 2002-05-24 Hager Electro Dispositif de rearmement automatique pour appareillage modulaire de protection a commander
FR2817078A1 (fr) * 2000-11-21 2002-05-24 Hager Electro Dispositif de commande a distance pour appareillage modulaire de protection
EP1209712A1 (de) * 2000-11-21 2002-05-29 Hager Electro S.A. Fernsteuervorrictung für modulares Schutzgerät
EP1213740A1 (de) * 2000-11-21 2002-06-12 Hager Electro S.A. Automatische Rückstellvorrichtung für modulares Schutzgerät
DE10324209B4 (de) * 2002-05-30 2016-11-24 Hager-Electro S.A.S. Automatische Reaktivierungs- und Fernsteuerungsvorrichtung für zu steuernde modulare Schutzgeräte
EP1429361A2 (de) * 2002-12-14 2004-06-16 LG Industrial Systems Co., Ltd. Phasenmangel Anzeigegerät für einen Schutzschalter mit gegossenem Gehäuse
EP1429361A3 (de) * 2002-12-14 2006-04-19 LG Industrial Systems Co., Ltd. Phasenmangel Anzeigegerät für einen Schutzschalter mit gegossenem Gehäuse
EP1441376A1 (de) * 2003-01-22 2004-07-28 Bticino S.P.A. Elektrisches Gerät mit fernbedienbarem Schalter

Also Published As

Publication number Publication date
PT883149E (pt) 2006-06-30
ITMI971208A1 (it) 1998-11-22
ITMI971208A0 (de) 1997-05-22
DE69834153T2 (de) 2006-08-31
ES2257793T3 (es) 2006-08-01
DE69834153D1 (de) 2006-05-24
IT1291980B1 (it) 1999-01-25
ATE323325T1 (de) 2006-04-15
EP0883149B1 (de) 2006-04-12
EP0883149A3 (de) 1999-04-14

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