EP0496938B1 - Disjoncteur haute puissance à basse tension à commande manuelle - Google Patents

Disjoncteur haute puissance à basse tension à commande manuelle Download PDF

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Publication number
EP0496938B1
EP0496938B1 EP91115344A EP91115344A EP0496938B1 EP 0496938 B1 EP0496938 B1 EP 0496938B1 EP 91115344 A EP91115344 A EP 91115344A EP 91115344 A EP91115344 A EP 91115344A EP 0496938 B1 EP0496938 B1 EP 0496938B1
Authority
EP
European Patent Office
Prior art keywords
opening
rocker
spring
pawl
loaded
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 - Lifetime
Application number
EP91115344A
Other languages
German (de)
English (en)
Other versions
EP0496938A3 (en
EP0496938A2 (fr
Inventor
Markus Anliker
Willy Feller
Christophe Petitpierre
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.)
Rockwell Automation Switzerland GmbH
Original Assignee
Sprecher und Schuh 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 Sprecher und Schuh AG filed Critical Sprecher und Schuh AG
Publication of EP0496938A2 publication Critical patent/EP0496938A2/fr
Publication of EP0496938A3 publication Critical patent/EP0496938A3/de
Application granted granted Critical
Publication of EP0496938B1 publication Critical patent/EP0496938B1/fr
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
    • 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
    • H01H71/56—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/046—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using snap closing mechanisms

Definitions

  • the present invention relates to a manually operable low-voltage circuit breaker with externally recognizable ON, OFF and TRIP positions, with an opening lever loaded by an opening spring, during an opening movement and in the OFF and TRIP positions acting on a movable contact piece is supported in the ON position of the circuit breaker on a stationary release pawl which can be released by a thermal and / or by a dynamic overcurrent release.
  • a current-limiting low-voltage circuit breaker is known from US-A-3935409.
  • a switch-off spring in order to achieve a sufficiently quick contact opening in the event of a short circuit, in this arrangement the mating contact piece to the movable contact piece is also movably mounted and moved away from the movable contact piece by the electromagnetic effect of the short circuit current, which is increased by an iron ring. With this measure, the contact opening of this circuit breaker is accelerated but dependent on the current.
  • a current-dependent contact opening time is disadvantageous for a fast-switching circuit breaker, in particular when relatively small short-circuit currents are interrupted, because the arcing time can extend over the first current zero crossing.
  • the downstream interrupters which are not designed for short-circuit current interruption, open and close depending on time and not on current. In such a switching arrangement, malfunctions cannot be ruled out.
  • this circuit breaker must be switched on directly against the opening spring of the movable contact piece by hand.
  • the separated contact pieces approach depending on the operating speed of the operator, the latches of the two spring-loaded counter-contact pieces still having to be released at the end of the switch-on movement. It is difficult to achieve the simultaneous closing of the two counter contact pieces.
  • the object of the present invention is to propose a low-voltage circuit breaker of the type mentioned at the outset which, for each size of the current to be interrupted, carries out a contact separation during the first increase in the short-circuit current, before reaching the first maximum value, and in each case essentially in the same time range, and one allows the circuit breaker to be switched on suddenly, regardless of the operating speed of the operator.
  • This low-voltage circuit breaker is able to perform a very quick separation between the movable contact piece and the fixed contact pieces because the overcurrent release acts directly on the transmission lever, the transmission lever on the one hand unlatching the release pawl and on the other hand releasing the support of the spring washers which are spring-loaded in the opening direction.
  • the first system consists of the transmission lever, the release pawl, the release lever with the release spring. This system acts very quickly on the moving contact piece.
  • the second system which contains all the other parts of the mechanical drive, is accelerated separately from the first system by the swivel plates which are spring-loaded in the direction of switch-off.
  • This circuit breaker has short-circuit current limiting properties. The circuit breaker is switched on independently of the operating speed of the operator by releasing the movable contact piece acted upon by the closing spring by means of the closing pawl.
  • the transfer lever and a resetting cam resetting against it are attached.
  • the trigger plunger which has been displaced by an overcurrent release, can easily be returned to the rest position via the transmission lever.
  • Figures 1 to 12 is in particular the mechanical drive of a manually operated low Voltage circuit breaker in different switching positions and intermediate positions shown schematically, with certain parts of the drive either hatched or strikingly thick, in order to better illustrate the movement of these parts during the switching movements. In these figures, therefore, the contours of several parts lying one behind the other in different planes are drawn one above the other.
  • Figures 13 to 23 show some parts of the drive on their own on a different scale, on an enlarged scale.
  • the manually operable low-voltage circuit breaker is equipped with two fixed contact pieces 1 and with a movable contact piece 2.
  • An only schematically indicated closing spring 3 acts on the movable contact piece 2.
  • This movable contact piece 2 is rigidly connected to a switching bar 4 which can be actuated by the mechanical drive.
  • On the switching bar 4 acts during a switch-off movement and in the OFF and TRIP positions ( Figures 1, 5, 6, 7, 11, 12) a switch lever 5 which is pivotally mounted about the axis 41 and which is loaded by a switch-off spring 6.
  • the opening lever 5 In the ON position and at the start of an opening movement (FIGS. 3, 4, 9, 10) of the circuit breaker, the opening lever 5 is supported on an opening pawl 8 which is pivotably mounted in the housing 7 about the axis 42.
  • a thermal and dynamic overcurrent release acts to a switch-off plunger 9 which, in the event of thermal or dynamic triggering caused by an overcurrent, pivots a transmission lever 10 which is pivotably mounted in the housing 7 about the axis 43 from the rest position.
  • the other lever arm of this transmission lever 10 in turn pivots the switch-off pawl 8 from the rest position and thereby unlatches the switch-off lever 5.
  • an actuating shaft 11 is provided which is pivotable through 90 ° and is provided with an actuating handle, not shown.
  • the OFF position of the actuating shaft 11 (Fig. 1, 7) is in its counterclockwise end position and the ON position (Fig. 3, 9) is in its end position in a clockwise direction.
  • the actuating shaft 11 lies between these two end positions.
  • the position of the operating handle reveals the position of the circuit breaker from the outside.
  • the actuating shaft 11 is shown in Figures 13 and 14 from the side and in the axial direction, alone. On this actuating shaft 11, two swivel plates 14 are pivotably mounted at points 12 and 13.
  • the swivel disk 14 mounted at point 13 is shown in FIG. 15 alone.
  • the swivel disk mounted at point 12 has the same contours as the swivel disk 14 in FIG. 15.
  • These two, at the points 12 and 13 mounted on the actuating shaft 11 swivel plates 14 are rigidly connected to one another and at the same time spaced by transverse bolts, not shown, inserted into the bores 16, 17, 16.
  • the interconnected swivel plates 14 are spring-loaded in the switch-off direction, counterclockwise in FIGS. 1 to 12.
  • the two swivel plates 14 have locking lugs 19 on which the transmission lever 10 is supported in the ON position of the circuit breaker (FIGS. 3, 9). After a thermal or dynamic triggering of the circuit breaker, the transmission lever 10 is pivoted away from the swivel plates 14, whereupon the swivel plates 14 move counterclockwise due to the spring action in the switch-off direction.
  • a rocker 20 which is shown in FIGS. 17 and 18 from the direction of the swivel axis and from the side, is pivotably mounted on a first connecting bolt inserted into the bores 18.
  • a support surface 27 is provided on one arm of the rocker 20 lying in the switch-off direction or in the counterclockwise direction of this connecting bolt.
  • a support pin 23 projecting to the side of the rocker 20 is arranged.
  • a clockwise spring-loaded rocker locking element 24 is pivotably mounted on a second connecting bolt inserted into the bores 17 of the swivel plates 14.
  • This rocker locking member 24 is shown in Figures 19 and 20 from the side and in the axial direction of its storage.
  • the spring acting on the rocker locking element 24 is not shown for reasons of better clarity, it is a leg spring which is wound onto the extension 25, supported on the rocker locking element 24 and on the swivel plate 14.
  • the blocking surface 26 of the rocker blocking element 24 lies in the OFF position of the circuit breaker (FIGS. 1, 7) on the supporting surface 27 of the rocker 20.
  • the laterally projecting extension 29 of the rocking blocking element 24 abuts one in FIGS. 2 and 8 Switching-on movement of the circuit breaker shown on a stationary stop 30, after which the rocker locking member 24 is tilted counterclockwise and the locks are released.
  • cam 21 On the actuating shaft 11 has a radially projecting extension 22 cam 21 is fixed against rotation. This cam disk 21 is shown in another scale on three sides in FIGS. 21, 22 and 23.
  • the extension 22 comes into engagement with the support pin 23 during a switch-off movement carried out by hand and pivots the arm of the rocker 20 carrying the support pin 23 radially inwards until the other arm of the rocker 20 pushes the transmission lever 10 away from the locking lugs 19 of the swivel plates 14. In this way, on the one hand, the latching between the swivel plates 14 and the transmission lever 10 and, on the other hand, the switch-off pawl 8 is released.
  • the actuating shaft 11 is provided with a radial cam 31 which carries an axially protruding driving pin 32.
  • the driver pin 32 protrudes in the assembled circuit breaker through the arcuate opening 15 of the swivel plate 14 mounted at the point 13 of the actuating shaft 11 and is under the action of a spring, not shown.
  • the switch pawl 34 Via the stop 33, the switch pawl 34, which is drawn only in FIG. 16, is set in drag connection with the cam 31.
  • the engaging pawl 34 is namely pushed with its bore 35 onto the actuating shaft 11 in the area 12 between the swivel plate 14 and the cam 31.
  • the switch pawl 34 is loaded counterclockwise by a spring, not shown.
  • driver pin 37 which is fastened in the bores 16 of the swivel plates 14 and which, when the circuit breaker is switched on, picks up the switch-off lever 5 on the surface 38 and thus tensions the switch-off spring 6.
  • Figures 1 and 7 show the circuit breaker in the OFF position.
  • the rocker 20 are hatched with dashed lines, the rocker locking member 24 with two-dot chain lines and the actuating shaft 11 with one-dot chain lines. This hatching is retained in the further FIGS. 2 to 6.
  • the contours of the swash plate 14 are drawn with a continuous, thick line.
  • the cam disc 21 was hatched and the contours of a one-piece reset cam 39 with a dashed line drawn out strikingly thick. This representation is constant in FIGS. 8 to 12.
  • the switch-off spring 6 is relaxed and the switch-off lever 5 is in contact with the switching bar 4.
  • the switch pawl 34 locks the switch bar 4 in the OFF position.
  • the actuating shaft 11 is in its counterclockwise end position, which can be recognized from the outside by the position of the actuating handle attached to the actuating shaft 11 as an OFF position.
  • the actuating shaft 11 is rotated clockwise by means of the actuating handle until the mechanical drive reaches the position shown in FIGS. 2 and 8.
  • the actuating shaft is in this position on the limit of the tilting of the parts of the rocker 20 and the rocker locking member 24, after which there is no turning back.
  • the cam 31 of the actuating shaft 11 has taken the rocker 20 and thus also the two swivel plates 14 in a clockwise direction.
  • the driver pin 37 fastened between the swivel plates 14 has attacked the take-off lever 5 on the surface 38 and has also taken it along, as a result of which the turn-off spring 6 has been tensioned.
  • the actuating shaft 11 is rotated counterclockwise.
  • the radial cam 31 is rotated under the rocker 20 until the intermediate position shown in FIGS. 4 and 10 is reached.
  • the pawl 34 rotates counterclockwise on the action of the spring loading it as soon as the cam 31 and the stop 33 of the pawl 34 are pivoted.
  • the switch pawl 34 is on the switching bar 4, as shown in Figures 4 and 10.
  • the radial cam 31 pivots the rocker 20 in a clockwise direction.
  • the extension 22 formed on the cam plate 21 engages the support pin 23 and pivots the rocker 20 clockwise until the other arm of the rocker 20 presses the transmission lever 10 away from the locking lugs 19 of the swivel plates 14, whereby on the one hand the spring-loaded swivel plates 14 are released are and on the other hand at the same time the switch pawl 8 is pivoted and thus the latch of the switch lever 5 is unlatched.
  • the switch-off lever 5 pushes the switch bar 4 and the movable cone clock 2 in the OFF position.
  • the spring-loaded rocker locking element 24 can, after the corners of the rocker 20 and the rocker locking element 24 have come out of engagement at the end of the pivoting movement of the rocker 20, tilt counterclockwise into the rest position.
  • FIGS. 1 and 7 show the circuit breaker in the OFF position.
  • the activated circuit breaker is shown in Figures 3 and 9.
  • the trigger plunger 9 hits the transmission lever 10.
  • the opening pawl 8 is pivoted on the one hand and the latching of the opening lever 5 caused by the opening pawl 8 is released and, on the other hand, the latching of the swivel plates 14 is released because it is released the transmission lever 10 is pivoted away from the locking lugs 19 of the swivel plates 14.
  • the release of the latching of the switch-off lever 5 by means of a two-lever system causing relatively little delay allows a very quick separation between the movable contact piece 2 and the fixed contact pieces 1.
  • the swivel plates 14 move into the position shown in FIGS. 5 and 11 .
  • the rocker 20, which is locked by the rocker locking member 24, and the rocker locking member 24 are themselves taken in a counterclockwise direction by the spring acting on the swivel plates 14 until the rocker locking member 24 is in contact with the switch-off lever 5.
  • the support pin 23 of the rocker 20 holds the switch-off pawl 8 in the unlatched position.
  • the radial cam 31 of the actuating shaft 11 has no non-positive or positive connection with the rocker 20.
  • the circuit breaker To be able to switch the circuit breaker back on after an overcurrent trip, the circuit breaker must first be moved from the TRIP position to the OFF position.
  • the TRIP position is shown in Figures 5 and 11. From this position, the actuating shaft 11 is rotated counterclockwise until the position shown in FIGS. 6 and 12 is reached.
  • the reset cam 39 presses the horizontal arm of the transmission lever 10 and thus the trigger plunger 9 upwards.
  • the trigger plunger 9 can only be pushed upwards if the thermal and dynamic overcurrent release is itself already in the untripped position. If the trigger plunger 9 is pushed upwards by swiveling the transmission lever 10 in a clockwise direction, the rocker 20 is also tilted back in a clockwise direction via the release pawl 8 and the support pin 23.

Landscapes

  • Breakers (AREA)
  • Amplifiers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Relay Circuits (AREA)
  • Keying Circuit Devices (AREA)

Claims (2)

1. Disjoncteur de puissance en basse tension, à commande manuelle, comportant trois positions visibles de l'extérieur, à savoir « branchement », « débranchement », « coupure », dans lequel un levier de coupure (5), soumis à l'action d'un ressort de coupure (6) agit pendant un mouvement de coupure ainsi que dans les positions « débranchement » et « coupure » sur une pièce de contact (2) mobile, levier qui dans la position « sous tension » du disjoncteur se trouve en appui sur un cliquet de coupure (8) monté sur un axe fixe et qui peut être dégagé par l'action d'un organe de libération déclenché thermiquement et/ou dynamiquement par une surtension, caractérisé en ce que
a) il est intercalé entre le cliquet de disjonction (8) et l'organe de libération déclenché thermiquement et/ou dynamiquement par une surtension, un levier de transmission (10) basculant prévu pour provoquer le mouvement du cliquet de coupure (8) qui l'amène en position de libération,
b) il est prévu, pour la commande manuelle, un arbre de manoeuvre (11) présentant trois positions stables, « sous tension », coupure » et « disjonction » visibles de l'extérieur,
c) sur l'arbre de manoeuvre (11) sont articulés deux disques basculants (14) reliés entre eux, avec espacement, par des pivots transversaux et soumis à une force élastique dans le sens de la coupure,
d) les deux disques basculants (14) présentent des dents d'arrêt (19) sur lesquelles s'appuie le levier de transmission (10) en position « branchement » de sorte que le basculement du levier de transmission (10), à la suite d'une libération thermique ou dynamique, d'une part dégage le cliquet de disjonction (8) et d'autre part libère de leurs appuis les disques basculants (14), le levier de disjonction (5) amenant alors la pièce mobile de contact (2) de manoeuvre (11) pour l'amener en position « coupure », et qu'un cliquet d'enclenchement (34) monté pivotant sur l'arbre de manoeuvre (11) et soumis à une force élastique, bloque la pièce mobile de contact (2) en position « débranchement »,
e) puis les bords des disques oscillants (14) et entre ceux-ci, sur un premier pivot de liaison, est montée une bascule (20) présentant sur son bras situé, selon le sens de coupure, en amont du pivot et sur l'autre bras, situé en aval, un téton d'appui (23) débordant latéralement, tandis que sur un second pivot de liaison situé, selon le sens de coupure, en amont de la bascule (20), est monté un organe d'arrêt (24) de la bascule, soumis à une force élastique et pouvant être libéré lors d'un mouvement d'enclenchement, par une butée fixe (30), cet organe (24) maintenant la bascule (20), dans les positions « branchement » et « coupure » en position dégagée, et la retenant en position encliquetée par sa surface d'appui (27) pour la position de « débranchement », le téton d'appui (23) maintenant en position dégagée le cliquet de coupure (8) lorsque le disjoncteur est en position « coupure »,
f) sur l'arbre de manoeuvre (11) est montée, solidaire en rotation de celui-ci, une came (21) présentant un bec radial (22) qui, lorsqu'on déclenche manuellement le mouvement de coupure fait basculer radialement vers l'intérieur le bras de la bascule (20) portant le téton (23) jusqu'à ce que l'autre bras de la bascule écarte le levier de transmission (10) par rapport aux disques basculants (14) et libère ainsi le blocage existant entre les disques (14) et le levier de transmission (10), de même que le cliquet de coupure (8),
g) l'arbre de manoeuvre (11) porte une came (31) équipée d'un téton d'entraînement (32) dépassant dans le sens axial, la came (31) se trouvant en liaison de remorquage avec le cliquet d'enclenchement (34) de sorte qu'à la fin d'un mouvement d'enclenchement (34), elle dégage la pièce mobile de contact (2) soumise à l'action du ressort d'enclenchement (3) en maintient, en position « branchement », le cliquet d'enclenchement (34) en position encliquetée, tandis que la came (31), lors d'un mouvement de coupure commandé à la main, ramène en les déplaçant vers l'arrière la bascule (20) et l'organe d'arrêt (24) en position encliquetée,
h) il est prévu, entre les deux disques basculants (14) une broche d'entraînement (37) qui, lors d'un mouvement d'enclenchement, entraîne le levier de coupure (5) et met ainsi sous tension le ressort de débranchement (6).
2. Disjoncteur selon la revendication 1, caractérisé en ce que la came (21) porte une came de rappel (39) qui, après une disjonction par surtension, lorsqu'on ramène en arrière l'arbre de manoeuvre (11) pour le mettre en position de « débranchement », repousse le levier de transmission (10) ainsi qu'un poussoir de libération (9) en appui sur ce levier.
EP91115344A 1991-02-01 1991-09-11 Disjoncteur haute puissance à basse tension à commande manuelle Expired - Lifetime EP0496938B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH323/91A CH681400A5 (fr) 1991-02-01 1991-02-01
CH323/91 1991-02-01

Publications (3)

Publication Number Publication Date
EP0496938A2 EP0496938A2 (fr) 1992-08-05
EP0496938A3 EP0496938A3 (en) 1993-04-21
EP0496938B1 true EP0496938B1 (fr) 1995-04-19

Family

ID=4184401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91115344A Expired - Lifetime EP0496938B1 (fr) 1991-02-01 1991-09-11 Disjoncteur haute puissance à basse tension à commande manuelle

Country Status (6)

Country Link
EP (1) EP0496938B1 (fr)
AT (1) ATE121561T1 (fr)
CH (1) CH681400A5 (fr)
DE (1) DE59105266D1 (fr)
DK (1) DK0496938T3 (fr)
ES (1) ES2071179T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9302253U1 (de) * 1993-02-17 1993-04-22 Klöckner-Moeller GmbH, 53115 Bonn Schaltvorrichtung für Leistungsschaltgeräte
DE19917577B4 (de) * 1999-04-19 2007-11-15 Moeller Gmbh Schaltgerät

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935409A (en) * 1962-05-18 1976-01-27 General Electric Company Current-limiting circuit breaker
IT1137121B (it) * 1981-04-02 1986-09-03 Sace Spa Interruttore elettrico,particolarmente limitatore di corrente
CH662210A5 (de) * 1982-09-28 1987-09-15 Sprecher & Schuh Ag Motorschutzschalter.

Also Published As

Publication number Publication date
EP0496938A3 (en) 1993-04-21
DK0496938T3 (da) 1995-07-31
CH681400A5 (fr) 1993-03-15
EP0496938A2 (fr) 1992-08-05
ATE121561T1 (de) 1995-05-15
ES2071179T3 (es) 1995-06-16
DE59105266D1 (de) 1995-05-24

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