EP0496938A2 - 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
EP0496938A2
EP0496938A2 EP91115344A EP91115344A EP0496938A2 EP 0496938 A2 EP0496938 A2 EP 0496938A2 EP 91115344 A EP91115344 A EP 91115344A EP 91115344 A EP91115344 A EP 91115344A EP 0496938 A2 EP0496938 A2 EP 0496938A2
Authority
EP
European Patent Office
Prior art keywords
switch
rocker
spring
pawl
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
EP91115344A
Other languages
German (de)
English (en)
Other versions
EP0496938B1 (fr
EP0496938A3 (en
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 a loading lever which is loaded by an opening spring, during an opening movement and in the OFF and TRIP positions 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 supported 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 arc time can extend over the first current zero crossing.
  • the downstream interrupters which are not designed for short-circuit current interruption, open and close, however, depending on the time and not on the 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 each other 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, 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 capable of very fast Carry out 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 switch-off pawl and on the other hand releasing the support of the swivel plates spring-loaded in the switch-off 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 disks which are spring-loaded in the switch-off direction.
  • This circuit breaker has short-circuit current limiting properties. The circuit breaker is switched on regardless 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 pusher resetting against it are attached.
  • the release plunger which has been moved by an overcurrent release, can easily be returned to the rest position via the transmission lever.
  • Figures 1 to 12 the mechanical drive of a manually operable low-voltage circuit breaker is shown schematically in various switching positions and intermediate positions, certain parts of the drive are 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 pivotally mounted about the axis 41, 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 pivotally 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 a 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 opening pawl 8 out of the rest position and thereby unlatches the opening 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) 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 pivotally 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 in the counterclockwise direction due to the spring action in the switch-off direction.
  • a rocker 20 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 rocker-lock member 24 which is spring-loaded in a clockwise direction is pivotably mounted.
  • 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 member 24 is not shown for reasons of clarity, it is a leg spring wound on the extension 25, supported on the rocker locking member 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 inward until the other arm of the rocker 20 moves the transmission lever 10 from the latching lugs 19 of the swivel plates 14 pushes away. 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 pivot plate 14 mounted at the point 13 of the actuating shaft 11 and is under the action of a spring, not shown.
  • the stop pawl 34 drawn only in FIG. 16, is set in drag connection with the cam 31 via the stop 33.
  • the engaging pawl 34 is namely pushed with its bore 35 onto the actuating shaft 11 in the region 12 between the swivel plate 14 and the cam 31 so that it can pivot.
  • the switch pawl 34 is loaded counterclockwise by a spring, not shown.
  • the operation of the manually operated circuit breaker is as follows described on the basis of the individual switching state changes.
  • FIGS. 1 and 7 the circuit breaker is shown 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 single-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 latch 34 latches 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 opening lever 5 on the surface 38 and also taken it along, as a result of which the opening spring 6 has been tensioned.
  • the actuating shaft 11 is rotated counterclockwise.
  • the radial cam 31 is rotated until the intermediate position shown in FIGS. 4 and 10 is reached under the rocker 20.
  • 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 molded on the cam plate 21 extension 22 engages on the support pin 23 and pivots the rocker 20 clockwise until the other arm of the rocker 20 pushes the transmission lever 10 away from the detents 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, but also the pawl 8 pivoted at the same time and thus the latch of the switch lever 5 is unlatched.
  • the switch-off lever 5 pushes the switching bar 4 and the movable contact piece 2 into 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.
  • the two swivel disks 14 reach the OFF position shown in FIGS. 1 and 7 on the action of a spring which loads them counterclockwise.
  • the latch 34 locks the switching bar 4 in the OFF position and holds the movable contact piece 2 in the OFF position.
  • Figures 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 transfer lever 10.
  • the transfer lever 10 By pivoting the transfer lever 10 in a counterclockwise direction, the switch-off pawl 8 is pivoted on the one hand and the release of the release lever 5 caused by the release pawl 8 is released and, on the other hand, the release of the pivot plates 14 is released because the transfer lever 10 is pivoted away from the detents 19 of the pivot plates 14.
  • the release of the latching of the switch-off lever 5 via 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.
  • actuating shaft 11 and the actuating handle attached to it are carried along via the driver pin 32 through the end of the opening 15 in the swivel plate 14 into the TRIP position lying between the ON and OFF positions.
  • Figures 5 and 11 show the circuit breaker in the TRIP position.
  • the circuit breaker To be able to switch the circuit breaker on again 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 in turn already in the untripped position. If the trigger plunger 9 is pushed upwards by pivoting the transmission lever 10 in a clockwise direction, the rocker 20 is also tilted back in a clockwise direction via the switch-off pawl 8 and the support pin 23.

Landscapes

  • Breakers (AREA)
  • Amplifiers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Relay Circuits (AREA)
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
CH323/91 1991-02-01
CH323/91A CH681400A5 (fr) 1991-02-01 1991-02-01

Publications (3)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4304772C1 (de) * 1993-02-17 1994-05-19 Kloeckner Moeller Gmbh Schaltvorrichtung für Leistungsschaltgeräte
DE19917577A1 (de) * 1999-04-19 2000-10-26 Moeller Gmbh Schaltgerät

Citations (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
EP0062369A2 (fr) * 1981-04-02 1982-10-13 SACE S.p.A. Costruzioni Elettromeccaniche Interrupteur électrique, plus particulièrement limiteur de courant
EP0110010A1 (fr) * 1982-09-28 1984-06-13 Sprecher & Schuh AG Disjoncteur pour moteur

Patent Citations (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
EP0062369A2 (fr) * 1981-04-02 1982-10-13 SACE S.p.A. Costruzioni Elettromeccaniche Interrupteur électrique, plus particulièrement limiteur de courant
EP0110010A1 (fr) * 1982-09-28 1984-06-13 Sprecher & Schuh AG Disjoncteur pour moteur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4304772C1 (de) * 1993-02-17 1994-05-19 Kloeckner Moeller Gmbh Schaltvorrichtung für Leistungsschaltgeräte
DE19917577A1 (de) * 1999-04-19 2000-10-26 Moeller Gmbh Schaltgerät
DE19917577B4 (de) * 1999-04-19 2007-11-15 Moeller Gmbh Schaltgerät

Also Published As

Publication number Publication date
DE59105266D1 (de) 1995-05-24
EP0496938B1 (fr) 1995-04-19
ES2071179T3 (es) 1995-06-16
CH681400A5 (fr) 1993-03-15
EP0496938A3 (en) 1993-04-21
DK0496938T3 (da) 1995-07-31
ATE121561T1 (de) 1995-05-15

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