EP0218497A1 - Schutzschalter mit federnder Lasche - Google Patents

Schutzschalter mit federnder Lasche Download PDF

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Publication number
EP0218497A1
EP0218497A1 EP86401923A EP86401923A EP0218497A1 EP 0218497 A1 EP0218497 A1 EP 0218497A1 EP 86401923 A EP86401923 A EP 86401923A EP 86401923 A EP86401923 A EP 86401923A EP 0218497 A1 EP0218497 A1 EP 0218497A1
Authority
EP
European Patent Office
Prior art keywords
hook
contact
protection switch
lever
control member
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
EP86401923A
Other languages
English (en)
French (fr)
Other versions
EP0218497B1 (de
Inventor
Dominique Beurdeley
Bernard Bizard
Pierre Merlin
Lucien Sauthier
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.)
Telemecanique SA
Original Assignee
Telemecanique Electrique SA
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 Telemecanique Electrique SA filed Critical Telemecanique Electrique SA
Priority to AT86401923T priority Critical patent/ATE50663T1/de
Publication of EP0218497A1 publication Critical patent/EP0218497A1/de
Application granted granted Critical
Publication of EP0218497B1 publication Critical patent/EP0218497B1/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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • H01H71/402—Combined electrothermal and electromagnetic mechanisms in which the thermal mechanism influences the magnetic circuit of the electromagnetic mechanism
    • 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

Definitions

  • Such a protection switch is described in patent application EP-0 047 847.
  • This switch has a tension spring anchored, on the one hand, on the manual control member at an eccentric point thereof and, d on the other hand, on a contact piece itself articulated with respect to the trigger lever.
  • the device in question requires a carefully calibrated and positioned spring, as well as a triangular kinematic connection of the manual member-lever, manual member-contact piece and lever-contact piece; an anchoring and a guide must, moreover, be provided for the spring in the manual control member and require an oversizing of the latter.
  • the object of the present invention is in particular to give a protection switch of the type mentioned above great simplicity of design and assembly, while retaining a small footprint for the lock-manual control member assembly.
  • Another purpose is to provide a protection switch with high trigger sensitivity.
  • the invention relates to a protection switch of the above type, in which the trigger lever is connected to a separate contact piece by means of a spring constituting, on the one hand, an elastic transmission link between the lever and the contact piece and contributing, on the other hand, to the abrupt opening of the contact piece.
  • An additional spring may be provided to contribute to the opening of the contact piece, but this opening is preferably produced by the aforementioned single elastic link.
  • the contact piece is advantageously pivotally mounted on a pin fixed relative to the housing, the elastic link cooperating with at least one support provided on the piece of contact to keep it applied to the fixed pin.
  • the fixed support is part of a rigid and electrically conductive part integral with one of the terminals of the switch, the spring makes it possible to ensure a satisfactory electrical connection between the terminal and the contact part without requiring braid or other flexible conductive medium.
  • the elastic link is, for example, a leaf or pin spring in the shape of a V or a U.
  • the spring has a first branch of the V applied to a second end of the lever release and a second branch of the V applicable on a closing support and on an opening support of the contact part.
  • the hook can advantageously constitute a spreader interposed between the core of the magnetic trip device and the bimetallic strip of the thermal trip device and arranged so that the beginning of deflection of the bimetallic strip causes a slight pivoting of the hook and a slight plunging of the core.
  • a return spring associated with the core of the magnetic trigger preferably constitutes a means for returning the hook to its position for hooking the spoiler.
  • the protective switch 10 shown in the figures is a circuit breaker having an electrically insulating casing 11, capable of being fixed by means of suitable snap-fastening members on a support such as a perforated plate or a standardized rail and provided with terminals Bl, B2 respectively connected to a movable contact Cl and to a fixed contact C2.
  • a support such as a perforated plate or a standardized rail and provided with terminals Bl, B2 respectively connected to a movable contact Cl and to a fixed contact C2.
  • the switch 10 comprises a manual control member M constituted by a rotary button of axis 01 and an automatic trigger member D provided with a magnetic trigger DM and a thermal trigger DT; the members M and D are mounted in the housing and are capable of separating the contact Cl from the contact C2 and therefore of opening the current path Bl, B2 by means of a lock in response to the detection of an electrical fault via DM or DT triggers or respectively in response to a manual command.
  • An interrupting chamber A is bordering on the contacts C1, C2.
  • the output element of the triggering member D is a hook 12 rotatably mounted about a fixed axis 02 relative to the housing and cooperating by a fork 13 which has two fingers 13a and 13b with a stock 14 with respective surfaces d 'support 14a and 14b.
  • the butt 14 is located at the end of a plunger core 15 of the magnetic trip device DM.
  • the hook 12 further cooperates by means of a finger 16 with a deformable bimetal lever 17 of the thermal trip device DT.
  • the lock comprises a trigger lever 18 in the form of a pendulum made of insulating material.
  • the lever 18 is directly mounted on a tenon 19 of the manual member M and has, for this purpose, a slide 20 slightly inclined (FIG. 1), or even parallel (FIG. 2), with respect to the front face 21 of the circuit breaker, and cooperating with said stud.
  • the tenon 19 is movable from a position X1 to a position X2 and vice-versa, while the slide 20 is curved at 20a at its right end ( Figure 3).
  • the lever 18 comprises, at a first end, a spoiler 22 resting on a support 23 of the hook (FIG. 6), this support being erasable as a result of the pivoting of the hook to authorize the tilting of the lever 18 in response to an electrical fault detected by the DM or DT trigger.
  • the lever 18 comprises, towards its second open end or head 24, a guide groove 25 substantially perpendicular to the face 21 and cooperating with a guide pin 26 formed in the housing.
  • a fulcrum or anchor point 27 is provided for a pin-shaped spring R in the shape of a V.
  • the first branch 28 of the spring R is thus applied to the displaceable anchor point 27 in order to tend to tilt the lever 18 clockwise: the second branch 29 of the spring R is fixed in rotation to a pin 30a formed on a conductive part rigid 30 which is fixed relative to the housing and which is secured to the terminal Bl.
  • the branch 29 is firstly applied at its end on a closing support 31 of a contact piece 32 separated from the lever 18 and constituting or carrying the contact Cl, second applicable near the tip of the V on an opening support 36 of the part 32, the supports 31 and 36 being located on either side of the fixed pin 30a.
  • the application of the brahche 29 on the closing support 31 ensures the closing of the contact C1 and its pressure on the contact C2; the application of the branch 29 on the opening support 36 allowing the opening of the contact Cl.
  • the direction of rotation of the contact piece Cl depends on the application of the differential force of the branch 29 on the one or the other support 31, 36, this being a function of the position of the anchor point 27 of the branch 28.
  • the manual control button M has a manual grip 33, the pin 19 is located substantially opposite the grip 33 relative to the axis 01 and at a distance from this axis allowing amplification of effort.
  • a return spring 34 is associated with the button M to assist the latter during a manual opening command and to call it back to the stop position during a trip on fault.
  • the DM trigger trigger comprises a spring 35 urging the core 15 so that the butt 14 of the latter pushes the finger 13a of the hook 12 in order to return the latter to the armed position of FIGS. 1 and 6.
  • the hook 12 advantageously constitutes a spreader interposed between the magnetic core 15 and the bimetallic strip 17, so that the beginning of deflection of the bimetallic strip causes a very slight counterclockwise pivoting of the hook and therefore a slight plunge of the core. In this way, the trigger intensity threshold of the DM trigger is lowered; an overload detected by the bimetallic strip of the thermal release therefore causes greater sensitivity of the magnetic release.
  • the finger 16 of the hook has an extension 37 located behind the bimetallic strip and provided with marks 16a which facilitate the adjustment of the bimetallic strip.
  • the manual control button M in abutment on the housing occupies a position such that its tenon 19 is in the position denoted Xl at the right end 20a of the slide 20.
  • the spoiler 22 of the lever 18 is hooked on the support 23 of the hook 12, which is held in the position indicated in FIG. 1 by the spring 35 of the magnetic trip device DM.
  • the spring R biases the lever 18 to make it tilt clockwise around the hinge pin 19, but is prevented by the above attachment.
  • the upper end of the groove 25 of the lever 18 is against the guide pin 26.
  • the hook 12 pivots counterclockwise and its bearing surface 23 emerges from the spoiler 22 by releasing the lever 18 (FIG. 7).
  • the latter pivots clockwise around the tenon 19 then occupying the position X1 under the effect of the upward stress exerted by the spring R on its anchor point 27.
  • the branch 28 of the spring rises; the branch 29 which is integral with it is driven and is applied to the drive support 36 provided on the contact piece 32 and rotates the latter suddenly clockwise to open the contact C1.
  • the user manually controls the button M to bring it by clockwise pivoting around 01 from its position in FIG. 1 to the position in FIG. 2, that is to say for carrying the post 19 from position Xl to position X2.
  • the hook 12 remains stationary and the spoiler located at the right end of the lever 18 remains hooked on the support 22, the latter therefore serving as a tipping point for the lever.
  • the hook is reset automatically under the effect of the return of the magnetic core to its upper position. It is sufficient to reset the switch to rotate the manual control button counterclockwise around the axis 01 from the "off" position (figure 2) to the "on” position (figure 1); the lever 18 and the branch 28 of the spring are thus lowered, so that the branch 29 urges the closing support 31 of the contact piece 32 until the application of C1 to C2; the separation of the branch 29 from the drive support 36 authorizes the contact pressure overtravel.
  • the spoiler 22 comes to hang on its support 23. At the end of rearming, the tenon 19 is housed in the curved end 20a of the slide 20, so that the button M is forced to remain in the on position.
  • a trigger display element can be provided on the head 24 of the lever 18 so that its displacement opposite a window formed in the recess of the front face 21 of the housing signals the trigger.
  • Marks 16a are advantageously provided on the finger 16 of the bimetallic strip 17 in order to assist an operator during the process of adjusting the bimetallic strip.
  • the manual control member M represented in the form of a pivoting button, could be produced in the form of a pusher.
  • the actuation of the member M can be carried out from a polar device or additive close to the protection switch considered.
  • the described elastic link constitutes the only means of mechanical interaction between the pivoting trigger lever and the contact part.
EP86401923A 1985-09-20 1986-09-02 Schutzschalter mit federnder Lasche Expired - Lifetime EP0218497B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401923T ATE50663T1 (de) 1985-09-20 1986-09-02 Schutzschalter mit federnder lasche.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8513942A FR2587829B1 (fr) 1985-09-20 1985-09-20 Interrupteur de protection a biellette elastique
FR8513942 1985-09-20

Publications (2)

Publication Number Publication Date
EP0218497A1 true EP0218497A1 (de) 1987-04-15
EP0218497B1 EP0218497B1 (de) 1990-02-28

Family

ID=9323085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401923A Expired - Lifetime EP0218497B1 (de) 1985-09-20 1986-09-02 Schutzschalter mit federnder Lasche

Country Status (4)

Country Link
EP (1) EP0218497B1 (de)
AT (1) ATE50663T1 (de)
DE (1) DE3669226D1 (de)
FR (1) FR2587829B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403329A1 (de) * 1989-06-16 1990-12-19 Hager Electro S.A. Schalter mit automatischer Auslösung, insbesondere Schutzschalter und Fehlerstromschutzschalter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104752113B (zh) * 2015-03-11 2017-05-17 浙江天正电气股份有限公司 一种电压电器电开关

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2132780A1 (de) * 1971-07-01 1973-01-11 Siemens Ag Schutzschalter, insbesondere leitungsschutzschalter
FR2368139A1 (fr) * 1976-10-18 1978-05-12 Bbc Brown Boveri & Cie Disjoncteur electrique automatique de surintensite et de courant de court-circuit
EP0018553A1 (de) * 1979-04-25 1980-11-12 SOCIETE D'APPAREILLAGE ELECTRIQUE SAPAREL Société anonyme dite: Modulschutzschalter
EP0028958A1 (de) * 1979-10-26 1981-05-20 Legrand Schutzschalter, sein Auslösemechanismus
EP0047847A1 (de) * 1980-09-15 1982-03-24 Siemens Aktiengesellschaft Leitungsschutzschalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2132780A1 (de) * 1971-07-01 1973-01-11 Siemens Ag Schutzschalter, insbesondere leitungsschutzschalter
FR2368139A1 (fr) * 1976-10-18 1978-05-12 Bbc Brown Boveri & Cie Disjoncteur electrique automatique de surintensite et de courant de court-circuit
EP0018553A1 (de) * 1979-04-25 1980-11-12 SOCIETE D'APPAREILLAGE ELECTRIQUE SAPAREL Société anonyme dite: Modulschutzschalter
EP0028958A1 (de) * 1979-10-26 1981-05-20 Legrand Schutzschalter, sein Auslösemechanismus
EP0047847A1 (de) * 1980-09-15 1982-03-24 Siemens Aktiengesellschaft Leitungsschutzschalter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403329A1 (de) * 1989-06-16 1990-12-19 Hager Electro S.A. Schalter mit automatischer Auslösung, insbesondere Schutzschalter und Fehlerstromschutzschalter
FR2648615A1 (fr) * 1989-06-16 1990-12-21 Hager Electro Perfectionnements aux interrupteurs a coupure automatique, notamment aux disjoncteurs et disjoncteurs differentiels

Also Published As

Publication number Publication date
DE3669226D1 (de) 1990-04-05
FR2587829B1 (fr) 1993-05-07
EP0218497B1 (de) 1990-02-28
ATE50663T1 (de) 1990-03-15
FR2587829A1 (fr) 1987-03-27

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