EP2805343B1 - Dispositif indicateur de défaillance de type court-circuit - Google Patents

Dispositif indicateur de défaillance de type court-circuit Download PDF

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Publication number
EP2805343B1
EP2805343B1 EP13722850.8A EP13722850A EP2805343B1 EP 2805343 B1 EP2805343 B1 EP 2805343B1 EP 13722850 A EP13722850 A EP 13722850A EP 2805343 B1 EP2805343 B1 EP 2805343B1
Authority
EP
European Patent Office
Prior art keywords
short
circuit
slider
condition
circuit breaker
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.)
Active
Application number
EP13722850.8A
Other languages
German (de)
English (en)
Other versions
EP2805343A2 (fr
Inventor
Augusto Contardi
Sergio Pianezzola
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.)
Larsen and Toubro Ltd
Original Assignee
Larsen and Toubro Ltd
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 Larsen and Toubro Ltd filed Critical Larsen and Toubro Ltd
Publication of EP2805343A2 publication Critical patent/EP2805343A2/fr
Application granted granted Critical
Publication of EP2805343B1 publication Critical patent/EP2805343B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H71/04—Means for indicating condition of the switching device
    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • H01H2071/042—Means for indicating condition of the switching device with different indications for different conditions, e.g. contact position, overload, short circuit or earth leakage

Definitions

  • the invention relates to a circuit breaker, and more particularly to a fault indicator or a short-circuit indicator adapted for the circuit breaker.
  • a circuit breaker is designed to trip and turn OFF power during short-circuit or fault condition and indicate short-circuit or fault to the user.
  • the handle of the circuit breaker gets tilted during a short circuit situation to indicate the short circuit situation which successively moves to its initial position to indicate that the circuit breaker is switched OFF.
  • mere tilting of the handle of the circuit breaker does not convincingly indicate exact operating condition of the circuit breaker to a remote observer.
  • a short-circuit condition is indicated by an indication mechanism visible on the circuit breaker.
  • the indication mechanism is indicated by a flag that is visible to a user.
  • the flag is mounted on a rotating drum.
  • a solenoid of the circuit breaker acts on the rotating drum.
  • the rotating drum is also connected to a handle of the circuit breaker.
  • an erroneous situation may arise if the rotating drum gets blocked. In such situation, the circuit breaker might mal-function and an indication of the short-circuit condition might be erroneous.
  • Document US 2006/097829 A1 discloses a circuit breaker device having a mechanism for indicating an ON condition, a TRIPPED condition and an OFF condition.
  • the mechanism comprises a slider (a solenoid plunger) connected to a solenoid coil and movable between first and second positions responsive to the operating conditions.
  • a rotating arm is connected to the slider and has an indication flag mounted thereon for indicating the plurality of operating conditions. Therefore, there exists a need of a short-circuit indicator mechanism for a circuit breaker that overcomes all the drawbacks of the prior art.
  • An object of the present invention is to provide a remote indication of a plurality of working conditions of a circuit breaker that gives a remote indication of an operating condition, a short-circuit condition and/or an OFF condition of the circuit breaker to a distant observer.
  • the present invention discloses a circuit breaker device having a short-circuit indicator mechanism adapted for indicating a normal operating condition, a short-circuit condition and an OFF condition of the circuit breaker.
  • the short-circuit indicator mechanism comprises a slider that is having a first end and a second end. The first end of the slider connects to a first hook. The second end of the slider connects to a solenoid. The slider slidably moves between a first position and a second position responsive to a plurality of operating conditions of the circuit breaker.
  • the short-circuit indicator mechanism includes a rotating arm that is having a second hook connected thereto. The second hook engages with the first hook in the first position of the slider. The second hook disengages with the first hook in the second position of the slider.
  • the rotating arm is having an indication flag mounted thereon.
  • the indication flag is adapted for indicating the plurality of operating conditions of the circuit breaker.
  • the rotating arm includes a slot adapted to accommodate a pin that assists in a movement of the rotating arm in response to the plurality of operating conditions.
  • the slider includes a spring extending between a body of the slider and the rotating arm adapted for assisting a counterclockwise rotation of the rotating arm.
  • the short-circuit indicator mechanism includes a solenoid 102, a slider 104, a rotating arm 110, and an indication flag 114.
  • the slider 104 is having a first end that includes a first hook 106.
  • the first hook 106 is preferably positioned substantially perpendicular to the first end.
  • the slider 104 is having a second end that connects to the solenoid 102 via an annular collar 118.
  • the slider 104 is removably connectable in this one preferred embodiment.
  • the slider 104 is linearly movable between a first position and a second position.
  • the solenoid 102 assists in the linear movement of the slider 104 between the first and second positions responsive to a plurality of operating conditions of circuit breaker 100.
  • the slider 104 remains in the first position in a normal operating condition of the circuit breaker 100.
  • the slider 104 moves to the second position during a short-circuit condition of the circuit breaker 100.
  • the short-circuit indicator mechanism includes a spring 103 that extends between a body of the slider 104 and the rotating arm 110.
  • the spring 103 substantially pushes the slider 104 against the solenoid 102.
  • the spring 103 also assists in a counterclockwise rotation of the rotating arm 110 in this one particular embodiment.
  • the rotating arm 110 is mounted on a housing of the circuit breaker 100 along a pivot 112.
  • the rotating arm 110 includes a second hook 108 that respectively engages and disengages with the first hook 106 depending upon the operating condition of the slider 104.
  • the rotating arm 110 includes an elongated slot that engages with a movable pin such that the pin is movable within the elongated slot per the movement of a movable contact of the circuit breaker 100 in this one particular embodiment.
  • the pin moves to an intermediate position inside the slot when the movable contact of the miniature circuit breaker 100 disengages with the fixed contact in the short-circuit condition.
  • the pin is configured to move inside the elongated slot and align to an edge of the slot to move the rotating arm 110 per the movement of a handle 120 of the circuit breaker 100.
  • the handle 120 is configured to open and close the movable contact of the circuit breaker 100 to preferably switch ON and switch OFF the circuit breaker 100. However, it is understood that the rotating arm 110 remains stationary if the short-circuit condition is not verified.
  • the short-circuit indicator mechanism includes an indication flag 114 that indicates the operating condition of circuit breaker 100 in this one preferred embodiment.
  • the short-circuit indicator mechanism further comprises a window 116 preferably located on the housing of circuit breaker 100 such that the indication flag 114 is visible through the window 116.
  • the indication flag 114 is visible through the window 116 during the short-circuit condition of the circuit breaker 100.
  • the flag 114 is invisible through the window 116 during a normal operating condition of the circuit breaker 100.
  • the circuit breaker 100 is in the normal operating condition.
  • the handle 120 In the normal operating position the handle 120 is in an ON position.
  • the solenoid 102 In this condition, the solenoid 102 is in a retracted position and the slider 104 is in a first position.
  • the first hook 106 and the second hook 108 are engaged with each other.
  • the indication flag 114 is not visible through the window 116.
  • FIG. 2 a short circuit condition of the circuit breaker 100 is shown.
  • the solenoid 102 reacts and moves the slider 104 to a second position.
  • the slider 104 moves such that the first hook 106 disengages from the second hook 108 to facilitate rotation of the rotating arm 110.
  • the indication flag 114 is visible through the window 116 to indicate the short-circuit condition of the circuit breaker 100.
  • the circuit breaker 100 is an OFF condition wherein the handle 120 shifts to an OFF position.
  • the solenoid 102 retracts to an original position to move the slider 104 back to the first position.
  • the first hook 106 and the second hook 108 contact without getting engaged with each other.
  • the indication flag 114 remains visible through the window 116 thereby indicating the short-circuit condition of the circuit breaker 100.

Landscapes

  • Breakers (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Claims (3)

  1. Dispositif de disjoncteur (100) comportant un mécanisme d'indication de court-circuit servant à indiquer un état de fonctionnement normal, un état de court-circuit et un état d'arrêt du disjoncteur, le mécanisme d'indication de court-circuit comprenant :
    un coulisseau (104) comportant une première extrémité et une seconde extrémité, la première extrémité étant reliée à un premier crochet (106), la seconde extrémité étant reliée à un solénoïde (102), le coulisseau (104) se déplaçant par coulissement entre une première position et une seconde position en réaction à une pluralité d'états de fonctionnement ; et
    un bras rotatif (110) comportant un second crochet (108) relié à celui-ci, le second crochet (108) venant en prise avec le premier crochet (106) dans la première position du coulisseau (104), le second crochet (108) se séparant du premier crochet (106) dans la seconde position du coulisseau (104), le bras rotatif (110) comportant un indicateur (114) supporté sur celui-ci, l'indicateur (114) étant conçu pour indiquer la pluralité d'états de fonctionnement.
  2. Mécanisme indicateur de court-circuit selon la revendication 1, dans lequel le bras rotatif (110) comprend une fente conçue pour recevoir une goupille qui facilite un déplacement du bras rotatif en réaction à la pluralité d'états de fonctionnement.
  3. Mécanisme indicateur de court-circuit selon la revendication 1, dans lequel le bras rotatif (110) et le coulisseau (104) comportent un ressort (103) s'étendant entre ceux-ci afin de faciliter une rotation du bras rotatif (110).
EP13722850.8A 2012-01-20 2013-01-11 Dispositif indicateur de défaillance de type court-circuit Active EP2805343B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN214MU2012 2012-01-20
PCT/IN2013/000022 WO2013114395A2 (fr) 2012-01-20 2013-01-11 Dispositif indicateur de défaillance de type court-circuit

Publications (2)

Publication Number Publication Date
EP2805343A2 EP2805343A2 (fr) 2014-11-26
EP2805343B1 true EP2805343B1 (fr) 2017-06-28

Family

ID=48444467

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13722850.8A Active EP2805343B1 (fr) 2012-01-20 2013-01-11 Dispositif indicateur de défaillance de type court-circuit

Country Status (2)

Country Link
EP (1) EP2805343B1 (fr)
WO (1) WO2013114395A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3023969B1 (fr) 2014-07-17 2017-12-22 Schneider Electric Ind Sas Dispositif de signalisation d'un defaut electrique dans un appareil de protection electrique, et appareil comportant un tel dispositif

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166989A (en) * 1978-04-19 1979-09-04 General Electric Company Circuit breaker remote close and charged signalling apparatus
DE3339398A1 (de) * 1983-10-29 1985-05-09 Sursum Elektrizitätsgesellschaft Leyhausen GmbH & Co, 8500 Nürnberg Selbstschalter mit offener und geschlossener kontaktstellung
GB2288487B (en) * 1994-04-13 1998-09-23 Gen Electric Apparatus for use with circuit breaker
US7414498B2 (en) * 2004-07-27 2008-08-19 Siemens Energy & Automation, Inc. Enhanced solenoid-armature interface
FR2883406B1 (fr) 2005-03-15 2009-04-17 Hager Electro Sa Sa Systeme indicateur de defaut magnetique

Also Published As

Publication number Publication date
WO2013114395A2 (fr) 2013-08-08
WO2013114395A3 (fr) 2013-10-10
EP2805343A2 (fr) 2014-11-26

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