EP0077229B1 - Dispositif de déclenchement d'un disjoncteur électrique - Google Patents

Dispositif de déclenchement d'un disjoncteur électrique Download PDF

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Publication number
EP0077229B1
EP0077229B1 EP19820401698 EP82401698A EP0077229B1 EP 0077229 B1 EP0077229 B1 EP 0077229B1 EP 19820401698 EP19820401698 EP 19820401698 EP 82401698 A EP82401698 A EP 82401698A EP 0077229 B1 EP0077229 B1 EP 0077229B1
Authority
EP
European Patent Office
Prior art keywords
hooking
spline
rollers
hook
force
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
Application number
EP19820401698
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0077229A1 (fr
Inventor
Pierre Batteux
Robert Morel
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin 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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0077229A1 publication Critical patent/EP0077229A1/fr
Application granted granted Critical
Publication of EP0077229B1 publication Critical patent/EP0077229B1/fr
Expired 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
    • H01H71/505—Latching devices between operating and release 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
    • H01H71/505—Latching devices between operating and release mechanism
    • H01H2071/506—Latching devices between operating and release mechanism using balls or rollers in the latching device

Definitions

  • the invention relates to a device for tripping an electrical circuit breaker according to the preamble of claim 1.
  • a known triggering device of the kind mentioned (US-A No. 2662136) uses locking members or rollers with rolling movement, that is to say with low friction. These roller hooks are capable of resuming large reactions without requiring a significant unlocking force and are particularly suitable for circuit breakers of high caliber using springs of large force.
  • the rolling force of the hook is derived from the rolling force of the rollers and the sliding of the tongue inserted between the two rollers towards an unlocking position.
  • This self-unlocking is hampered by the attraction of the tab by an electromagnet, the triggering resulting from the release of the tab by bypassing the flux of the electromagnet.
  • This known system has failures due to bonding and matting of the contacting surfaces which transmit the large force exerted by the hook. This sticking, which slows or prevents tripping of the circuit breaker, is frequent when the circuit breaker rarely works and failure to trip can have disastrous consequences.
  • the object of the present invention is to remedy these drawbacks and, as characterized in claim 1, it allows the production of a reliable and simple triggering device.
  • Triggering takes place in two successive phases, a first phase of pivoting of the tongue, imposed by the action of the triggering lever, which leads, on the one hand, to disengagement of the tongue from the stop and, on the other hand, a micro-displacement of the support points of the rollers on the tongue and a second phase of self-displacement of the tongue and the rollers.
  • the displacement force of the tongue is derived from the hooking force of the hook and is greater the greater the support force and, therefore, the risk of sticking.
  • the trigger lever acts transversely on the tongue and it will appear from the description below that the micro-displacements generated by this transverse movement of the tongue break the bonding forces and initiate the sliding movement of the tongue.
  • the pair of rollers is advantageously mounted in a cage crossed by the end of the tongue and urged in the hooking position by a spring. As soon as the hook is released, the rollers automatically return to the locked position, as does the tongue also subjected to a return spring. When resetting the circuit breaker, the hook temporarily pushes the rollers back to catch on and, during this maneuver, the discharged rollers slide easily on the tongue and the support.
  • a hook 10 of a mechanism (not shown) of an electric circuit breaker cooperates with a roller hook, designated by the general reference 12.
  • the circuit breaker can be of the molded case type having a manual operating handle and an automatic trigger on fault.
  • Such circuit breakers are well known to specialists under the trade name Compact, and they include an energy storage spring (not shown) for opening the contacts when the hook 10 is released under the action of the trip device.
  • the beak-shaped end 14 of the hook 10 abuts against a roller 16, lower in the figures, of a pair of superimposed rollers 16,18 mounted in a holding cage 20.
  • the upper roller 18 is supported on a support surface 22 of a fixed support 24, and the assembly of rollers 16, 18 and cage 20 is mounted with limited sliding in the fixed support 24 parallel to the support surface 22 between the rollers 16,18 is inserted the end of a hooking tongue 26, which extends substantially parallel to the bearing surface 22 through the cage 20.
  • the opposite end 28 of the tongue attachment 26 cooperates, in the locked position, with a stop plate 30 of the fixed support 24, preventing sliding of the tongue 26 to the right in the figures.
  • a trigger lever 32 rotatably mounted on an axis 34, strikes, when triggered, the end 28 to lift the latter above the edge of the stop plate 30 and unlock the tongue 26, which can then slide freely.
  • the hooking force of the hook 10 is transmitted by the lower roller 16, the tongue 26 and the upper roller 18 to the fixed support 24.
  • the bearing surface 22 is slightly inclined to form, with the surface 36 of the spout 14, a small angle corner, and that the hooking force of the hook 10 tends to drive the rollers 16, 18 to the outside of this corner to the right in the figures.
  • the rollers 16, 18 can roll by imposing on the tongue 26 a double movement to the right in the directions indicated by the arrows in the figures.
  • Rolling friction is very low, even in the presence of a high latching force. It is easy to choose the angle of the bearing surfaces 22, 36 in order to have an unlocking force, derived from the latching force, sufficient to move the rollers 16, 18 and tongue 26 assembly by rotation. self-unlocking hook 10, but insufficient for sliding movement.
  • the spout 14 escapes after a predetermined displacement of the rollers 16, 18 to the right, and the released hook 10 pivots towards the release position, the cage 20 and the support 24 of course having a groove 38 for passage of the hook 10 ( fig. 4).
  • the tongue 26, clamped between the rollers 16,18, is urged by this clamping force to a position perpendicular to the line 0102 of the centers of the rollers 16, 18, which corresponds to the locking position of the tongue 26.
  • the tongue 26 tends to pivot clockwise while pressing the trigger lever 32 and the stop plate 30.
  • the locking position is a stable position preventing any untimely triggering.
  • the trigger lever 32 When triggered, the trigger lever 32 rotates the tab 26 counterclockwise in the figures to lift the end 28 above the edge of the stop plate 30 and unlock the tongue 26. During this pivoting, the points 8 1 , 8 2 of contact of the rollers 16, 18 and of the tongue 26 are modified, which breaks the bonding forces and initiates the self-unlocking by rolling of the rollers 16, 18 to the right. These displacements of the contact points 8 1 , B Z are very small, but sufficient to eliminate any risk of blocking the attachment.
  • the trigger lever 32 must overcome the sliding friction of the end 28 on the stop plate 30 and the centering force imposed by the rollers 16,18, but these forces are easily controllable and can possibly be reduced.
  • the device works as follows:
  • the hooking force of the hook 10 is taken up by the fixed support 24 via the rollers 16, 18. Any displacement by rolling of the rollers 16,18 is prevented by the tongue 26 in abutment of the stop plate 30.
  • the slight inclination of the surface 36 of the spout 14 of the hook 10 generates a component in the sliding direction of the tongue 26 towards the unlocking position, which is taken up by the stop plate 30.
  • the trigger causes a pivoting in the trigonometric direction of the trigger lever 32, which strikes the end 28 of the tongue 26.
  • the tongue 26 pivots (fig.
  • the hook 10 pivots in the opposite direction and, in passing, pushes the rollers 16, 18, which are unloaded, to the right, before coming to hang in the position shown in FIG. 1.
  • the assembly is simple and reliable and allows a control of important fastening forces essential in circuit breakers of high rating.

Landscapes

  • Breakers (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP19820401698 1981-10-05 1982-09-20 Dispositif de déclenchement d'un disjoncteur électrique Expired EP0077229B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8118841A FR2514196A1 (fr) 1981-10-05 1981-10-05 Dispositif de declenchement d'un disjoncteur electrique
FR8118841 1981-10-05

Publications (2)

Publication Number Publication Date
EP0077229A1 EP0077229A1 (fr) 1983-04-20
EP0077229B1 true EP0077229B1 (fr) 1985-04-10

Family

ID=9262814

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820401698 Expired EP0077229B1 (fr) 1981-10-05 1982-09-20 Dispositif de déclenchement d'un disjoncteur électrique

Country Status (6)

Country Link
EP (1) EP0077229B1 (enrdf_load_stackoverflow)
JP (1) JPS5870657U (enrdf_load_stackoverflow)
CA (1) CA1221397A (enrdf_load_stackoverflow)
DE (1) DE3263007D1 (enrdf_load_stackoverflow)
ES (1) ES8306425A1 (enrdf_load_stackoverflow)
FR (1) FR2514196A1 (enrdf_load_stackoverflow)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662136A (en) * 1951-03-14 1953-12-08 Hitachi Ltd High speed trip device for electric circuit breakers
GB850647A (en) * 1956-03-06 1960-10-05 British Thomson Houston Co Ltd Improvements in high speed tripping mechanisms
DE1192295B (de) * 1962-04-06 1965-05-06 Bbc Brown Boveri & Cie UEbertotpunktgesperre mit sich aufeinander abstuetzenden Waelzkoerpern

Also Published As

Publication number Publication date
JPH0121465Y2 (enrdf_load_stackoverflow) 1989-06-27
JPS5870657U (ja) 1983-05-13
FR2514196A1 (fr) 1983-04-08
CA1221397A (en) 1987-05-05
ES516083A0 (es) 1983-06-01
DE3263007D1 (en) 1985-05-15
EP0077229A1 (fr) 1983-04-20
FR2514196B1 (enrdf_load_stackoverflow) 1984-12-28
ES8306425A1 (es) 1983-06-01

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