EP1537588A1 - Ensemble contacts de commutation dote d'un temoin d'usure des contacts - Google Patents

Ensemble contacts de commutation dote d'un temoin d'usure des contacts

Info

Publication number
EP1537588A1
EP1537588A1 EP03797161A EP03797161A EP1537588A1 EP 1537588 A1 EP1537588 A1 EP 1537588A1 EP 03797161 A EP03797161 A EP 03797161A EP 03797161 A EP03797161 A EP 03797161A EP 1537588 A1 EP1537588 A1 EP 1537588A1
Authority
EP
European Patent Office
Prior art keywords
display
contact
erosion
pin
switching
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
EP03797161A
Other languages
German (de)
English (en)
Other versions
EP1537588B1 (fr
Inventor
Detlev Schmidt
Günter Seidler
Sezai TÜRKMEN
Artur Wajnberg
Ingo Thiede
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1537588A1 publication Critical patent/EP1537588A1/fr
Application granted granted Critical
Publication of EP1537588B1 publication Critical patent/EP1537588B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/0015—Means for testing or for inspecting contacts, e.g. wear indicator

Definitions

  • the invention is in the field of electrical switches, which are equipped with a switching contact arrangement provided with a movable first switching contact and a second switching contact assigned to the first switching contact, and can be used in the structural design and manufacture of a burn-up indicator for the switching contacts.
  • the erosion display has a display pin and a display surface or display edge, the display pin following the movement of the first switch contact and then and only then projecting over the display surface or display edge when the switch contacts are closed, if the value of the erosion of the switch contacts is less than a specified maximum value (operating instructions for the 3WN6 circuit breaker from Siemens AG, Germany, 1998).
  • the movable switching contact has a contact carrier and a plurality of contact levers which are each supported on the contact carrier by means of contact force springs.
  • the metal indicator pin is supported on one of the contact levers and is guided in a bore of the contact carrier running in the direction of force of the contact force spring.
  • a recess of the contact carrier serving as a viewing opening is open on one side towards the bore, the end of the indicator pin facing away from the contact lever only protruding into the viewing opening when the amount of erosion of contact supports (contact pieces) formed on the contact levers protrudes. is the value of the erosion of these contact pads greater than the predetermined maximum value, the indicator pin no longer protrudes into this viewing opening.
  • a newly provided indicator pin must be inserted into the bore of the contact carrier and, when the switch contacts are closed, shortened in such a way that its end facing away from the contact lever after shortening by the value of the specified maximum erosion - for example 2.7 mm - protrudes into the viewing opening.
  • a special tool that can be inserted into the very narrow viewing opening is required for this shortening. Since the replacement of worn switch contact arrangements is regularly carried out by installers at the site of the operator of such electrical switches, the installer must have this special tool.
  • the invention has for its object to design the erosion display so that the shortening of the indicator pen is facilitated.
  • this object is achieved in that at least one marking is provided for shearing off the display pin, the marking being spaced apart from the display surface or display edge by the maximum permissible value of the erosion of the switching contacts.
  • a newly provided indicator pen can be replaced by simple, common tools. ge, for example with a slotted screwdriver on the
  • the on-site fitter therefore does not need an expensive special tool to shorten the display pin when the switch contacts are closed at a point which is spaced from the display surface or display edge by the predetermined value of the maximum erosion.
  • a display pin is to be understood to mean any element which, when it projects over the display surface or display edge, is clearly visible and which can be shortened without great technical effort, for example by shearing.
  • Such an element can, for example, have any polygonal, oval or round cross-section or, for example, also be designed as a strip or stiff band.
  • This element can be supported on the movable switch contact directly or via an intermediate link, fastened to the movable switch contact or can also be designed as an integrated component of the movable switch contact.
  • a preferred embodiment of the new switch contact arrangement provides that the marking, in particular for guiding the shear edge of a tool, is designed as a shear surface or shear edge. With such a configuration, the indicator pin can be shortened exactly at the shearing edge or shearing surface without the need for additional marking of the indicator pin itself.
  • the indicator pin is made of plastic.
  • a support surface can be provided which runs parallel to the indicator pin.
  • the low-voltage circuit breaker known from the aforementioned operating instructions can also be provided with the new switching contact arrangement in that the marking is formed by a first side of a second recess that is open to the first recess.
  • the support surface can be formed by a section of the bore that is open to the bottom of the first recess.
  • the second recess can form lateral guide surfaces for the tool used for shearing off.
  • the indicator pin of a new switch contact arrangement installed in the electrical switch can easily be adapted to the given dimensions of the new switch contact arrangement by appropriate shearing off.
  • all that is required is a display pin that projects beyond the marking when the switch contacts are closed and then sheared off at the marking.
  • a common tool for example a flat-blade screwdriver, can be used for shearing.
  • Circuit breaker with the new burn-up indicator is shown in Figures 1 to 7. Show:
  • FIG. 1 shows a schematically illustrated low-voltage circuit breaker with a switch contact arrangement which comprises a burn-up indicator for the switch contacts provided with contact pads
  • FIG. 2 shows the switch contact arrangement according to FIG. 1 in a first view in new condition with an uncut indicator pin
  • FIG. 3 shows the switching contact arrangement in new condition when the indicator pin is sheared off
  • FIG. 4 shows the switch contact arrangement in the state of the maximum permissible erosion of the contact supports of the switch contacts
  • FIG. 5 shows a first section of the switch contact arrangement in a sectional view along the section line A-A in FIG. 3 and
  • FIGS. 6 and 7 show a second section of the switch contact arrangement in a top view with an uncut indicator pin according to FIG. 2 and a sheared indicator pin according to FIG.
  • the low-voltage circuit breaker according to FIG. 1 has a housing 1, in which a switching contact arrangement, consisting of a movable switching contact 2 and a fixed contact 3, an arc quenching chamber 4 and a drive mechanism 6 are accommodated.
  • the drive mechanism 6 serves to actuate the movable switching contact 2, which has a plurality of contact levers 8 which are supported in a pivotable contact carrier 7 and arranged parallel to one another (only one contact lever is visible in the figure).
  • the contact levers 8 are pivotally mounted in the contact carrier 7 in a known manner by means of a gel bolt and are prestressed by two contact force springs 9 each.
  • Flexible conductors 10 are used to connect the contact levers 8 to a lower connecting bar 11.
  • the fixed switching contact 3 assigned to the movable switching contact 2 is connected to an upper connecting bar 12.
  • the switching contacts 2, 3 are provided with contact pads 13, 14 (switching pieces) in the form of an attached body made of a highly specialized material, which consist of sintered materials that Ni, W and other special target metals contained. These are comparatively expensive and are therefore applied in relatively thin layers. Since the contact pads 13, 14, which are still relatively thick when the switching contact arrangement is new, are subject to material erosion in switching arcs, for example, a complete melting of the contact pads must be ensured. Therefore, a certain value of the erosion is specified as the maximum permissible value, the switching contact arrangement for displaying the respectively existing value of the erosion comprising a display device 15. When installing a new switch contact arrangement at the location of the operator of the electrical switch, it is desirable that the erosion indicator can be set to the specified value of the maximum permissible erosion without special tools.
  • the erosion indicator according to FIG. 2 has a display pin 16 made of plastic, and a display surface 17 or display edge 18 running in a first plane, the display pin 16 with closed switch contacts 2, 3 on a marking of the switch contact arrangement designed as a shear surface 19 is to be shortened.
  • This shear surface 19 is at a distance 20 from the display surface 17, the value of which corresponds to the predetermined maximum value of the shield.
  • the newly inserted indicator pin is supported on one of the contact levers 8.
  • it has a collar 21 at its end facing the contact lever. This collar 21 engages in a pocket 22 of the contact lever.
  • the contact force springs 9 penetrated by the indicator pin 16 are prestressed and hold the indicator pin on the contact lever 8 such that it follows the movement of the contact lever.
  • a bore 25 begins at the bottom 23 of the receiving force 24 of the contact force spring and extends through the contact carrier 7 and is open to a first side of a first recess 27 forming the display surface 17 and to the bottom 35 of the first recess 27. This bore 25 serves for guiding the indicator pin 16.
  • the first recess 27 has a width in the direction of displacement of the indicator pin 16, the value of which corresponds to the value of the distance 20 and thus the value of the maximum permissible erosion.
  • a newly provided indicator pin 16 projects beyond the first side of the second recess 30 serving as the shear surface 19 (cf. also FIG. 6).
  • a slotted screwdriver 31 with its wedge-shaped end serving as a shear edge 32 is jerkily guided downward on the shear surface 19 to shear off the indicator pin 16.
  • the side surfaces 33, 34 (see FIG. 6) of the second recess 30 serve as guide surfaces for the screwdriver 31.
  • a section of the bore that is open toward the bottom 35 of the first recess 27 forms a support surface 36 for the indicator pin 16 when sheared off.
  • the bottom 37 of the second recess is located somewhat lower, so that a part 38 (cf. FIGS. 3 and 6) of the indicator pin 16 projecting beyond the shear surface 19 can be completely sheared off.
  • This part 38 can also be cut off, filed off or cut off in another way by other tools.
  • the indicator pin 16 ends after shearing in the plane of the shear surface 19 and thus, when the switching contact arrangement is in new condition, shows exactly the value of the maximum permissible erosion when viewed in relation to the display surface 17.
  • the indicator pin 16 ends in the plane of the display surface 17 and is therefore no longer visible to the viewer from above when the contact supports 13, 14 of the switch contacts 2, 3 have burned down by the predetermined maximum permissible value and the switch contact arrangement is renewed got to .

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Breakers (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Abstract

L'invention concerne un ensemble contacts de commutation comprenant un premier contact de commutation (2) mobile, un deuxième contact de commutation (3) associé au premier et un témoin d'usure (15) des contacts, lequel est pourvu d'une broche d'indication (16) et d'une surface d'indication (17) ou d'un bord d'indication (18). La broche suit le mouvement du premier contact de commutation et lorsque les contacts de commutation sont fermés, mais seulement lorsqu'ils sont fermés, elle dépasse la surface ou le bord d'indication si la valeur d'usure des contacts de commutation est inférieure à une valeur maximale définie. L'invention vise à raccourcir la broche d'indication d'un tel ensemble à l'état neuf sans outils spéciaux, à une certaine distance (20) de la surface d'indication (17) ou du bord d'indication (18), cette distance correspondant à la valeur de l'usure maximale autorisée des contacts de commutation (2, 3). A cet effet, au moins un marquage pour la coupe de la broche est placé à une distance correspondant à la valeur maximale autorisée d'usure des contacts de commutation relativement à la surface ou au bord d'indication.
EP03797161A 2002-09-13 2003-07-30 Ensemble de contacts de commutation avec un indicateur d'usure pour les contacts Expired - Fee Related EP1537588B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10243835 2002-09-13
DE10243835A DE10243835B3 (de) 2002-09-13 2002-09-13 Schaltkontaktanordnung mit einer Abbrandanzeige für die Schaltkontakte
PCT/DE2003/002591 WO2004027802A1 (fr) 2002-09-13 2003-07-30 Ensemble contacts de commutation dote d'un temoin d'usure des contacts

Publications (2)

Publication Number Publication Date
EP1537588A1 true EP1537588A1 (fr) 2005-06-08
EP1537588B1 EP1537588B1 (fr) 2007-05-09

Family

ID=32009857

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03797161A Expired - Fee Related EP1537588B1 (fr) 2002-09-13 2003-07-30 Ensemble de contacts de commutation avec un indicateur d'usure pour les contacts

Country Status (6)

Country Link
US (1) US7045731B2 (fr)
EP (1) EP1537588B1 (fr)
CN (1) CN100421194C (fr)
DE (2) DE10243835B3 (fr)
HK (1) HK1078984A1 (fr)
WO (1) WO2004027802A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101217081B (zh) * 2007-12-30 2010-12-22 人民电器集团有限公司 具有指示装置的小型断路器
FR2945661A1 (fr) * 2009-05-18 2010-11-19 Schneider Electric Ind Sas Evaluation de l'usure de contacts enfonces par la variation de la rotation de l'arbre des poles
CN103377860B (zh) * 2012-04-20 2017-03-01 施耐德电器工业公司 断路器及监测断路器触头磨损程度的方法
DE102017213266A1 (de) 2017-08-01 2019-02-07 Siemens Aktiengesellschaft Schalter, insbesondere Niederspannungs-Leistungsschalter, mit einer Signalisierung der Abnutzung seiner Kontaktauflagen und Einrichtung zur Signalisierung der Abnutzung
DE102017213245B4 (de) 2017-08-01 2021-02-04 Siemens Aktiengesellschaft Schalter, insbesondere Niederspannungs-Leistungsschalter, mit einer Signalisierung der Abnutzung seiner Kontaktauflagen und Einrichtung zur Signalisierung der Abnutzung
DE102017213234A1 (de) 2017-08-01 2019-02-07 Siemens Aktiengesellschaft Schalter, insbesondere Niederspannungs-Leistungsschalter, mit einer Signalisierung der Abnutzung seiner Kontaktauflagen und Einrichtung zur Signalisierung der Abnutzung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1092101B (de) * 1955-08-29 1960-11-03 Siemens Ag Anordnung zur UEberwachung des Schaltstueckabbrandes
DE1764447U (de) * 1957-10-10 1958-04-03 Willi Fiedler Selbstkassierende anschliessvorrichtung.
GB1360837A (en) * 1972-10-19 1974-07-24 Reyrolle Parsons Ltd Lock-out mechanisms for switches
DE19635366A1 (de) * 1996-08-21 1998-02-26 Siemens Ag Bewegbare Kontaktanordnung für einen Niederspannungs-Leistungsschalter mit einem Schwenklager
DE29615566U1 (de) * 1996-08-28 1998-01-02 Siemens AG, 80333 München Bewegbare Schaltkontaktanordnung mit einem Kontakthebel aufnehmenden Kontakthebelträger
US6150625A (en) * 1999-10-12 2000-11-21 Eaton Corporation Vacuum circuit breaker with contact wear indicator tool

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004027802A1 *

Also Published As

Publication number Publication date
US7045731B2 (en) 2006-05-16
DE50307255D1 (de) 2007-06-21
EP1537588B1 (fr) 2007-05-09
CN100421194C (zh) 2008-09-24
WO2004027802A1 (fr) 2004-04-01
DE10243835B3 (de) 2004-04-15
CN1679127A (zh) 2005-10-05
US20050224331A1 (en) 2005-10-13
HK1078984A1 (en) 2006-03-24

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