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EP0872867B1 - Electrically assembly with actuating device for a switch - Google Patents

Electrically assembly with actuating device for a switch Download PDF

Info

Publication number
EP0872867B1
EP0872867B1 EP98201104A EP98201104A EP0872867B1 EP 0872867 B1 EP0872867 B1 EP 0872867B1 EP 98201104 A EP98201104 A EP 98201104A EP 98201104 A EP98201104 A EP 98201104A EP 0872867 B1 EP0872867 B1 EP 0872867B1
Authority
EP
European Patent Office
Prior art keywords
component
wall
motor
electrical assembly
switch
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
EP98201104A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0872867A2 (en
EP0872867A3 (en
Inventor
Fabrizio Fabrizi
Claudio Ghirimoldi
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 EP0872867A2 publication Critical patent/EP0872867A2/en
Publication of EP0872867A3 publication Critical patent/EP0872867A3/en
Application granted granted Critical
Publication of EP0872867B1 publication Critical patent/EP0872867B1/en
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
    • H01H71/70—Power reset mechanisms actuated by electric motor
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together
    • H01H2071/0278—Mounting several complete assembled circuit breakers together with at least one of juxtaposed casings dedicated to an auxiliary device, e.g. for undervoltage or shunt trip
    • 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
    • H01H2071/665—Power reset mechanisms the reset mechanism operating directly on the normal manual operator, e.g. electromagnet pushes manual release lever back into "ON" position
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together
    • 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
    • H01H71/1009—Interconnected mechanisms
    • H01H71/1018—Interconnected mechanisms with only external interconnections

Definitions

  • the present invention relates to an electrical assembly comprising a switch and an actuating device for the switch and in particular to an electrical assembly according to the preamble of the first Claim.
  • a switch is an electrical device able to interrupt or establish a flow of current in a circuit by means of suitable contacts which can be separated; in particular, the contacts are pressed together with a suitable force in a closed condition of the switch, while they are separated by an isolating distance in an open condition of the switch.
  • Actuating devices are commonly used, for example in control systems for industrial installations, in order to perform switching operations (opening or closing) of the switch using energy other than manual energy.
  • the actuating devices use an electric motor in order to move an operating lever of the switch from an open position into a closed position, and vice versa, in response to a suitable external command signal.
  • a drawback of the known electrical assemblies consists in the fact that the actuating devices require the use of motors which are extremely fast, and therefore complex and costly, in order to be able to adapt to the high opening speed of the switch.
  • the use of simpler and slower motors, with a speed suitable for the closing operation creates problems during opening of the switch; in particular, when the operating lever reaches the release position, the opening mechanism drives the motor at too high a speed or else the motor brakes the operating lever, slowing down the opening operation. In both cases, a malfunction situation arises, with consequent possible damage to the switch or the motor of the actuating device.
  • the object of the present invention is to overcome the aforementioned drawbacks. This object is achieved by an electrical assembly as described in the first Claim.
  • the electrical assembly according to the present invention ensures a high speed of opening of the switch using, for the constructional design of the actuating device, a slow motor which has a speed suitable for the closing operation and therefore has a simple and extremely low-cost design.
  • Document EP 0 549 084 discloses a device according to the preamble of claim 1.
  • this shows an electrical assembly 100 comprising an actuating device 103 for a switch 106.
  • the actuating device 103 is used as a servomotor in a closed-chain control system, although its use for different applications, for example for simple remote control of the switch 106, is not excluded.
  • the switch 106 comprises an insulating body 107, the side walls of which are provided with one or more pairs of terminals 109 for connection of the switch 106 to corresponding pairs of electric cables of an external circuit (not shown in the figure).
  • An operating component 112 typically consisting of a lever, is movable rotationally about an axis 113 between a position 112' and a position 112" for opening and closing the switch 106, respectively.
  • the insulating body 107 houses internally an opening mechanism (not shown in the figure) which, when the operating lever, leaving the closed position 112" , reaches a middle release position 112"', triggers movement of the operating lever towards the open position 122'.
  • this opening mechanism which is known per se and conventional, consists of a spring tensioned during an operation involving closing of the switch 106 and released when the operating lever 112 reaches, during an opening operation, the position 112"' .
  • the actuating device 103 comprises an insulating body 115 formed by two half-shells joined together by suitable screws. One lateral flank of the insulating body 115 is provided with a terminal strip 118 for connection of the actuating device 103 to an electrical power supply network.
  • the terminal strip 118 is also used to apply to the actuating device 103 suitable command signals (for opening and closing) supplied by a remote control device (not shown in the figure); the actuating device 103 may, however, be designed also using different systems for transmission of the command signals, for example by means of radio waves.
  • the actuating device 103 is provided with a bar 154 (or other equivalent positioning means known per se) which is parallel to the axis of rotation 113 and the bottom surface of which has, formed in it, a longitudinal channel 157 into which the operating lever 112 of the switch 106 is inserted.
  • the operating lever 112 is slidable inside the channel 157, in the direction of the axis 113, so as to allow assembly of the electrical group 100, while the operating lever 112 and the positioning bar 154 move locked in rotation about the axis 113.
  • the switch 106 and the actuating device 103 are connected together by means of special locking components.
  • an L-shaped component 166 (only one of which is shown in the figure).
  • the L-shaped component 166 terminates, along the smaller arm of the L, in a tractional hook 169 which engages in a slit 172 formed in a rear surface of the switch 106.
  • the L-shaped component 116 is housed in a matching seat 173 formed in the actuating device 103 along a front vertical edge.
  • the larger arm of the L-shaped component terminates, at its free end, in an opening 175 which is situated opposite a threaded hole 178 formed in the seat 173 perpendicularly with respect to a side surface of the actuating device 103.
  • a screw 181 seated in the opening 175 and screwed into the threaded hole 178 removably fixes the L-shaped component 166 to the actuating device 103.
  • the actuating device 103 includes a motor 203 (for example a reversible synchronous electric motor) connected to the positioning bar 154 by means of a special transmission device 206.
  • a disc 209 is connected to the motor 203 so as to be rotationally moved about an axis 210 parallel to the axis of rotation 113.
  • a side surface 211 of the disc 209 is provided with two recesses 212 and 215 which are diametrically opposite.
  • a micro-switch 218 is located in the vicinity of the disc 209 and has, associated with it, a flat spring 221 (or other equivalent resilient means) terminating in an idle wheel 224 which is free to rotate about an axis parallel to the axis of rotation 210.
  • a flat spring 221 or other equivalent resilient means terminating in an idle wheel 224 which is free to rotate about an axis parallel to the axis of rotation 210.
  • the wheel 224 is disengaged from the recess 212 and is pushed towards the micro-switch 218 by the side surface 211 of the disc 209, so that the spring 221 closes the contact of the micro-switch 218.
  • the disc 209 has performed a rotation through 180°, the other recess 215 is located opposite the wheel 224; the spring 221 pushes the wheel 224 inside the recess 215 and opens the contact of the micro-switch 218, which interrupts the movement of the motor 203 (and hence the disc 209).
  • the disc 209 is connected to the positioning bar 154 by means of a sliding link structure; the present invention may, however, also be realized with connections of a different type, such as the friction type.
  • the front surface 209 in the vicinity of its side surface, is provided with two sliding members 227 and 230, for example in the form of a stud, situated diametrically opposite one another and slightly staggered with respect to the recesses 212 and 215.
  • the positioning mechanism 206 then includes an articulated structure formed by a component 233 and a component 236 movable rotationally about the axis 113.
  • a hole 239 is formed in one end of the component 233 and receives, inserted inside it, a pin 242 arranged along the axis of rotation 113 and integral with the body 115 of the actuating device 103; the positioning bar 154 is fixed perpendicularly with respect to the free end of the component 233.
  • the component 233 terminates, in the vicinity of the pin 242, in a substantially cylindrical shape; from a front surface of this end there extends perpendicularly a wall 245 in the form of a portion of a cylindrical side surface.
  • the component 236 also terminates, at one of its ends, in a substantially cylindrical shape in which a hole 247 for receiving the pin 242 is formed; from a rear surface of this end there extends perpendicularly a further wall 250 in the form of a cylindrical side surface portion.
  • a helical spring 253 (or other equivalent resilient means), the ends of which are fixed in suitable holes formed in the components 233 and 236, is inserted between the component 233 and the component 236 (specifically in a groove formed on the front surface of the component 233).
  • the spring 253 keeps the components 233 and 236 aligned, with the walls 245 and 250 being arranged in abutment along their upper side edges 254 and 255, respectively.
  • the walls 245 and 250 are of a length such that, in this condition, their bottom side edges, 256 and 257, are separated preferably by an angle of 60° with respect to the axis 113.
  • the rear surface of the component 236 has, formed in it, a longitudinal groove 258 which is open at the free end of the component 236 and which acts as a guide for the studs 212 and 215.
  • the actuating device 103 is in the condition shown in the figure, with the positioning bar 154 and the component 236 in a position 154' and 236', respectively, corresponding to the open position of the switch. If the actuating device 103 receives a closing command signal, the disc 209 is rotated through 180° in an anti-clockwise direction. When the stud 227 reaches the component 236, it engages inside the guide 258, causing the component 236 to rotate in an anti-clockwise direction about the pin 242.
  • connection between the walls 250 and 245 transmits this movement also to the component 233 which moves integrally with the component 236.
  • the positioning bar 154 (integral with the component 233) during its movement causes displacement of the operating bar of the switch so that the latter is closed.
  • the component 236 and the positioning bar 154 reach a position 236" and 154", respectively, corresponding to the closed position of the switch; the stud 227 disengages from the guide 258 and the disc 209 completes its rotation until the recess 215 reaches the wheel 224.
  • the disc 209 is rotated through 180° in a clockwise direction.
  • the stud 227 engages inside the guide 258, causing the component 236 to rotate in an anti-clockwise direction about the pin 242.
  • the component 236 is free to rotate with respect to the component 233; by suitably calibrating the stiffness of the spring 253 so that the force required to deform it is less than the force required to operate the switch, the component 236 rotates against the action of the spring 253, while the component 233 remains stationary.
  • the bottom edge 257 of the wall 250 is arranged in abutment against the bottom edge 256 of the wall 245.
  • the connection between the walls 245 and 250 transmits the movement of the component 236 also to the component 233 which moves integrally with the latter.
  • the positioning bar 154 (integral with the component 233) is thus displaced as far as the position 154"' and during its movement causes displacement of the operating bar of the switch so that it reaches the release position.
  • the stud 227 disengages at this point from the guide 258 and the disc 209 completes its rotation until the recess 212 reaches the wheel 224, while the component 236 is aligned with the component 233 by the spring 253.
  • the positioning bar 154 is disengaged from the disc 209 (and hence from the motor 203), so that it is displaced by the operating lever of the switch until it reaches the position 154' shown in Fig. 2a.
  • the presence of two studs 227 and 230 allows the actuating device 106 to be used independently of the initial position of the component 236 and hence the operating lever 154.
  • the transmission mechanism described above is particularly compact, reliable and effective. Moreover it is extremely simple and can be mass-produced at a low cost, so that it does not increase the final cost of the entire actuating device.

Landscapes

  • Mechanisms For Operating Contacts (AREA)
  • Relay Circuits (AREA)
  • Keying Circuit Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP98201104A 1997-04-18 1998-04-14 Electrically assembly with actuating device for a switch Expired - Lifetime EP0872867B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI970916 1997-04-18
IT97MI000916A IT1291610B1 (it) 1997-04-18 1997-04-18 Gruppo elettrico con dispositivo di azionamento per un interruttore

Publications (3)

Publication Number Publication Date
EP0872867A2 EP0872867A2 (en) 1998-10-21
EP0872867A3 EP0872867A3 (en) 1999-04-14
EP0872867B1 true EP0872867B1 (en) 2006-06-14

Family

ID=11376964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98201104A Expired - Lifetime EP0872867B1 (en) 1997-04-18 1998-04-14 Electrically assembly with actuating device for a switch

Country Status (6)

Country Link
EP (1) EP0872867B1 (it)
AT (1) ATE330326T1 (it)
DE (1) DE69834859T2 (it)
ES (1) ES2262208T3 (it)
IT (1) IT1291610B1 (it)
PT (1) PT872867E (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10013106C1 (de) * 2000-03-17 2001-10-04 Aeg Niederspannungstech Gmbh Knebelverbindung
DE10013103C1 (de) * 2000-03-17 2001-11-29 Aeg Niederspannungstech Gmbh Gehäuse
FR2817079B1 (fr) * 2000-11-21 2003-02-14 Hager Electro Dispositif de rearmement automatique pour appareillage modulaire de protection a commander
ITRM20030021A1 (it) * 2003-01-22 2004-07-23 Bticino Spa Apparecchio elettrico con interruttore comandato a distanza.
ITBG20030041A1 (it) * 2003-07-22 2005-01-23 Abb Service Srl Comando motorizzato per interrutori di bassa tensione.
DE102005024270B3 (de) 2005-05-27 2006-10-19 Ellenberger & Poensgen Gmbh Vorrichtung zur Fernbetätigung eines Handbetätigers eines Schutzschalters
FR3087273B1 (fr) * 2018-10-15 2020-11-06 Schneider Electric Ind Sas Dispositif de mesure et appareil de commutation electrique
DE102019122978B4 (de) * 2019-08-27 2022-11-10 Bender Gmbh & Co. Kg Elektrischer Fernantrieb zur Betätigung einer Schalteinrichtung einer elektrischen Anlage sowie Fernantriebs-Anordnung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2247567A (en) * 1990-08-30 1992-03-04 Mk Electric Ltd Circuit breaker motorised actuating device
DE4142854A1 (de) * 1991-12-20 1993-06-24 Siemens Ag Kraftantrieb fuer elektrische schaltgeraete mit einem betaetigungshandgriff
FR2699733B1 (fr) * 1992-12-21 1995-03-17 Merlin Gerin Disjoncteur modulaire associé à un bloc de télécommande.

Also Published As

Publication number Publication date
EP0872867A2 (en) 1998-10-21
ATE330326T1 (de) 2006-07-15
DE69834859D1 (de) 2006-07-27
ES2262208T3 (es) 2006-11-16
ITMI970916A1 (it) 1998-10-18
EP0872867A3 (en) 1999-04-14
DE69834859T2 (de) 2006-12-07
PT872867E (pt) 2006-08-31
IT1291610B1 (it) 1999-01-11

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