EP0737991A1 - Elektrisches Gerät, insbesondere Leistungsschalter, ausgerüstet mit einer Sicherheitsvorrichtung - Google Patents

Elektrisches Gerät, insbesondere Leistungsschalter, ausgerüstet mit einer Sicherheitsvorrichtung Download PDF

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Publication number
EP0737991A1
EP0737991A1 EP96410025A EP96410025A EP0737991A1 EP 0737991 A1 EP0737991 A1 EP 0737991A1 EP 96410025 A EP96410025 A EP 96410025A EP 96410025 A EP96410025 A EP 96410025A EP 0737991 A1 EP0737991 A1 EP 0737991A1
Authority
EP
European Patent Office
Prior art keywords
contacts
stop
opening
lever
position corresponding
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
EP96410025A
Other languages
English (en)
French (fr)
Other versions
EP0737991B1 (de
Inventor
Michel Lazareth
Philippe Delcambre
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
Original Assignee
Schneider Electric SE
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 Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0737991A1 publication Critical patent/EP0737991A1/de
Application granted granted Critical
Publication of EP0737991B1 publication Critical patent/EP0737991B1/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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
    • 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
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
    • H01H2009/288—Provisions relating to welded contacts
    • 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
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
    • H01H9/281—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a padlock

Definitions

  • the present invention relates to an electrical device, and in particular a circuit breaker equipped with a safety device, this device being arranged to prevent padlocking in the event of welding of a movable contact on a fixed contact following a short circuit, this device being equipped with a manual control lever arranged to be brought by rotation about an axis, either in a normal open position corresponding to the opening of said contacts, or in a normal closed position corresponding to the closing of said contacts , and a control mechanism which transmits control of said lever to a pivoting arm carrying said movable contact.
  • the present invention aims to eliminate this danger by equipping the electrical appliance concerned with an adequate safety device.
  • the electrical device according to the invention characterized in that the safety device comprises a stop serving as a stop for said control lever, this stop being offset angularly, relative to a position corresponding to the position. normal opening, of an angle sufficient for the force applied to this lever to bring it to bear against this stop is greater than or equal to a predetermined threshold when said contacts are welded.
  • said predetermined threshold corresponds to a breaking force of essential components of the apparatus, and said breaking force is defined by a standard.
  • the drum carrying the control handle has a recess which is arranged to coincide with an opening formed in the side walls of a housing of the device, to allow said padlocking, said opening is angularly offset with respect to the position occupied by said recess when the lever is in the position corresponding to the application of a force whose value is equivalent to said predetermined threshold when said contacts are welded.
  • the partially shown device in this case a circuit breaker 10, comprises a pair of contacts, one of which 11 is fixed and mounted on a support 12 which is connected, in a non- shown, at one of the terminals of the circuit breaker and the other of which 13 is movable.
  • This movable contact is arranged at one end of an arm 14 pivoting about an axis 15, called a movable contact arm.
  • the axis 15 is mounted on a plate 16 which also carries a hooking hook 17 articulated on an axis 18 integral with the plate 16.
  • the hooking hook is linked to one end of a link 19, this end being articulated at a point 20 on said hook, the other end of the link 19 being articulated at a point 21 on a drum 22 rotating around an axis 23 which carries a lever 24 for manual control.
  • the drum 22 is housed in an appropriate cavity of the circuit breaker housing and has a recess 25 which, when the contacts are open and the lever is brought into abutment against a stop integral with said housing, coincides with an opening 27 formed through the side walls of this housing to allow the passage of a sealing wire 28, the handle of a padlock or other locking device.
  • the configuration of the components as shown in FIG. 1 corresponds to a normal situation, the contacts being free, not welded, and the lever with manual control acting through the control mechanism, correctly on the movable contact.
  • FIG. 2 shows this same device 10 when the contacts 11 and 13 are soldered following a short circuit. It can be seen that, although the contacts are closed, the handle 24 for manual control has been able to be brought to bear against the stop 26 and that the recess 25 has been brought opposite the opening 27 made in the side walls of the housing so that the lockout operation was made possible. To reach this state, the operator had to force the lever, which has the effect of deforming the link 19.
  • the applied force is less than a limit value, or threshold defined by a standard. Beyond this threshold, the applied force causes a complete rupture of the mechanism but, below this threshold, the applied force causes only a deformation of the link which does not allow the operator to realize danger due to the non-de-energization of the circuit.
  • the device 30 shown in this case a circuit breaker, comprises as before a fixed contact 31 mounted on a support 32, a movable contact 33 disposed at one end of an arm 34 pivoting around an axis 35.
  • This axis is carried by a plate 36 which also carries a hook 37 articulated on an axis 38 integral with this plate.
  • a link 39 is linked at a point 40 to said hook 37 and at a point 41 to a drum 42, rotatable about an axis 43, which carries a lever 44 for manual control.
  • the drum 42 is provided with a recess 45 which, when the contacts 31 and 33 are open and the lever is brought into abutment against a stop 46 secured to the housing (not shown) of the device, coincides with an opening 47 formed through the side walls of this box to allow the passage of a sealing wire 48 or the handle of a padlock.
  • the configuration of the components as shown in FIG. 3 corresponds to a normal situation, the contacts 31 and 33 being free, not welded, and the manual control lever 44 acting correctly on the movable contact, through the control mechanism.
  • FIG. 4 shows the device 30 in a configuration where the contacts 31 and 33 are soldered following a short circuit.
  • the handle 44 is in an intermediate position without deformation of the link 39.
  • the recess 45 does not coincide with the opening 47, so that a padlocking of the device is not possible.
  • the device When the operator exerts a force on the lever 44 in the opening direction, the device can be brought into a position which corresponds to that of FIG. 5.
  • the configuration shown corresponds to a limit force, or threshold normalized in below which the mechanism is not completely destroyed, and beyond which the essential components of the mechanism are damaged. It is noted that, in this case, the manual control lever 44 is not in abutment against the stop 46 and that the recess 45 does not coincide with the opening 47 so that padlocking of the device does not is not possible. If the operator pushes the joystick by applying a force which is greater than said threshold, deterioration of essential components of the apparatus is inevitable.
  • Figure 6 shows the device in the unlocked open position, following normal triggering. Note that the recess does not coincide with the opening 47, preventing padlocking. The latter is only possible if the lever 44 is pressed against the stop 46.
  • FIG. 6 it is possible to provide a compression spring 50 which is mounted in such a way that it tends to oppose the movement of the lever 44 in its final phase, that is to say towards the support against the stop 46, when the contacts 31 and 33 are free.
  • the spring 50 opposes a determined resistance on the lever in the displacement phase in which the contacts are already open, but where the lockout position is not yet reached. This resistance makes it possible to make the user attentive to his approach by forcing him to press his effort on the joystick.
  • the spring could be replaced by a friction, or any other member having the same functions, making it possible to attract the attention of the user.

Landscapes

  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Braking Systems And Boosters (AREA)
  • Braking Arrangements (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP96410025A 1995-04-13 1996-03-19 Elektrisches Gerät, insbesondere Leistungsschalter, ausgerüstet mit einer Sicherheitsvorrichtung Expired - Lifetime EP0737991B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9504679A FR2733087B1 (fr) 1995-04-13 1995-04-13 Appareil electrique et notamment disjoncteur equipe d'un dispositif de securite
FR9504679 1995-04-13

Publications (2)

Publication Number Publication Date
EP0737991A1 true EP0737991A1 (de) 1996-10-16
EP0737991B1 EP0737991B1 (de) 2002-06-12

Family

ID=9478253

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96410025A Expired - Lifetime EP0737991B1 (de) 1995-04-13 1996-03-19 Elektrisches Gerät, insbesondere Leistungsschalter, ausgerüstet mit einer Sicherheitsvorrichtung

Country Status (7)

Country Link
EP (1) EP0737991B1 (de)
CN (1) CN1056705C (de)
AT (1) ATE219282T1 (de)
DE (1) DE69621695T2 (de)
ES (1) ES2176422T3 (de)
FR (1) FR2733087B1 (de)
HU (1) HU218957B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1143477A1 (de) * 2000-04-07 2001-10-10 Hager Electro S.A. Sicherheitseinrichtung für elektrisches Gerät vom Schutzschalter Typ

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1111644B1 (de) * 1999-12-21 2004-03-24 Hager Electro S.A. Sicherheitsvorrichtung für elektrisches Gerät
DE102010020987B4 (de) 2010-05-19 2012-04-05 Eaton Industries Gmbh Leistungsschalter mit Abschließvorrichtung
KR102007779B1 (ko) * 2018-02-06 2019-08-07 엘에스산전 주식회사 접지스위치를 갖는 개폐장치

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408466A2 (de) * 1989-07-11 1991-01-16 Merlin Gerin Betätigungsmechanismus für elektrischen Schalter
EP0450699A2 (de) * 1990-04-04 1991-10-09 GE Power Controls Italia S.p.a. Abschliessvorrichtung mittels Vorhängeschloss von Handbedienteilen elektromechanischer Einrichtungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408466A2 (de) * 1989-07-11 1991-01-16 Merlin Gerin Betätigungsmechanismus für elektrischen Schalter
EP0450699A2 (de) * 1990-04-04 1991-10-09 GE Power Controls Italia S.p.a. Abschliessvorrichtung mittels Vorhängeschloss von Handbedienteilen elektromechanischer Einrichtungen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1143477A1 (de) * 2000-04-07 2001-10-10 Hager Electro S.A. Sicherheitseinrichtung für elektrisches Gerät vom Schutzschalter Typ

Also Published As

Publication number Publication date
FR2733087A1 (fr) 1996-10-18
CN1056705C (zh) 2000-09-20
CN1139287A (zh) 1997-01-01
HU9600942D0 (en) 1996-06-28
EP0737991B1 (de) 2002-06-12
HU218957B (hu) 2001-01-29
HUP9600942A3 (en) 1999-04-28
ATE219282T1 (de) 2002-06-15
FR2733087B1 (fr) 1997-06-06
DE69621695T2 (de) 2002-12-05
ES2176422T3 (es) 2002-12-01
HUP9600942A2 (en) 1997-05-28
DE69621695D1 (de) 2002-07-18

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