EP0108678B1 - Ferngesteuertes Stromschaltgerät - Google Patents

Ferngesteuertes Stromschaltgerät Download PDF

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Publication number
EP0108678B1
EP0108678B1 EP83402080A EP83402080A EP0108678B1 EP 0108678 B1 EP0108678 B1 EP 0108678B1 EP 83402080 A EP83402080 A EP 83402080A EP 83402080 A EP83402080 A EP 83402080A EP 0108678 B1 EP0108678 B1 EP 0108678B1
Authority
EP
European Patent Office
Prior art keywords
remote control
contact arm
movable contact
spring
arm
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
EP83402080A
Other languages
English (en)
French (fr)
Other versions
EP0108678A1 (de
Inventor
Gérard Terrier
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
Priority to AT83402080T priority Critical patent/ATE19838T1/de
Publication of EP0108678A1 publication Critical patent/EP0108678A1/de
Application granted granted Critical
Publication of EP0108678B1 publication Critical patent/EP0108678B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • H01H89/08—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together
    • H01H2071/0278—Mounting several complete assembled circuit breakers together with at least one of juxtaposed casings dedicated to an auxiliary device, e.g. for undervoltage or shunt trip
    • 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
    • H01H71/66—Power reset mechanisms
    • H01H2071/665—Power reset mechanisms the reset mechanism operating directly on the normal manual operator, e.g. electromagnet pushes manual release lever back into "ON" position

Definitions

  • the invention relates to a low voltage current cutoff device having a movable contact carried by a tilting contact arm and cooperating in the closed position with a fixed contact, said contact arm being subjected to the action of a spring.
  • tilting mechanism that selectively solicits the contact arm in two stable positions, one for closing and the other for opening the device contacts, to the exclusion of any other intermediate position and a high-endurance remote control mechanism having a pivoting balance cooperating with said spring to suddenly tilt said movable contact arm from the closed position to the open position and vice versa following a remote control command.
  • remote-controlled devices of the type mentioned, in particular remote control switches or contactors which allow manual or automatic remote control to start or stop a power supply circuit.
  • a charge FR-A-2 482 773.
  • the circuit is protected by a separate device, in this case a circuit breaker which opens automatically in the event of an overload or fault.
  • the present invention starts from the observation that these devices are generally mounted on the same panel and that a grouping of the two remote control and protection functions in the same device would allow significant reductions in manufacturing and installation costs.
  • the apparatus according to the present invention is characterized in that it further comprises an automatic triggering mechanism in the event of overload and / or fault having a triggering spring of force greater than that of said tilting spring and cooperating with said movable contact arm for moving the latter in the open position while controlling a fault current and for maintaining the movable contact arm in the open position regardless of the position of the remote control mechanism as long as the trigger mechanism is in the triggered position , and a manual reset member of the trigger mechanism to authorize in the armed position of the latter a remote-controlled closure of the device.
  • the remote control mechanism and the triggering mechanism are independent of each other but they both act on the same movable contact, the connection between the remote control mechanism and the movable contact being arranged so as not to hinder an action of the mechanism. trigger.
  • the high endurance remote control mechanism is capable of carrying out several tens of thousands of operations while the tripping mechanism has the characteristics of a circuit breaker in this case sufficient energy and rapidity to cut off a current of short circuit.
  • Circuit breakers are known which are fitted with an electric control allowing remote control of closing and / or opening.
  • the electrical control acts directly on the handle (US-A-4,167,716) or on the mechanism (US-A-4,292,612) of the circuit breaker which is designed for a limited number of operations, for example a few thousand.
  • Remote-controlled circuit breakers can be used in certain special cases, for example centralizing orders, but they are unable to provide intensive remote control service.
  • the movable contact arm and the remote control pendulum constituting a bistable click assembly, the displacement of one of the elements causing that of the other, so that they always occupy the same position. Whatever the mode of opening the contacts, the balance is positioned correctly for a successive closing command.
  • the trip mechanism After a fault trip, the trip mechanism must be reset by actuation of a reset lever to allow a closing remote control.
  • the lever automatically comes to the open position when the contacts are separated on tripping, but it can only come to this position if the contacts are effectively separated.
  • the position of the lever in the open position is a visible and reliable indication of the opening of the contacts.
  • All the constituent elements are housed in a molded case, for example of the modular system commercially known as MULTI 9, the pole pitch being 18 mm.
  • the device can of course include several contiguous poles.
  • the actual remote control actuator is housed in an independent molded case of the same profile, rigidly coupled to the cut-off block to form a one-piece assembly.
  • This remote control is advantageously of the remote control type, well known in itself, causing a change of position at each control pulse. It can be of a different type, for example with two electromagnets, one for closing, the other for opening, or with a single electromagnet associated with a return spring.
  • the remote control unit is equipped with an emergency control handle, which replaces the remote control for manual opening or closing of the device.
  • the reset lever is arranged to allow a manual control of opening of the contacts comparable to a trip on fault which neutralizes the remote control mechanism.
  • This handle provides reliable sectioning and to avoid unnecessary handling the handle is shaped to require an actuation tool.
  • a breaking device represented by the general reference 10, comprises a molded case 12 of profile corresponding to the modular system commercially known as MULTI 9.
  • MULTI 9 modular system commercially known as MULTI 9.
  • Several unipolar blocks can be assembled or joined to form a multipolar device, each block having its individual box 12 or the assembly being assembled in a single multipole box. Only one of the poles of the device is described in detail below, the others being exactly identical.
  • a fixed contact 14 connected by a conductor 16 to a current arrival terminal 18 as well as a movable contact 20 carried by a contact arm 22, pivotally mounted on a fixed pivot 24 secured to the housing 12.
  • the movable contact 20 is electrically connected by a braid 26 to the input of a trip coil 28, the output of which is connected by a braid 30 to a bimetallic strip 32 connected to the opposite terminal 34.
  • the closed position of the contacts 14, 20, shown in FIG. 1 the current entering at a given time through the terminal 18 passes through the closed contacts 14, 20, the coil 28 and the bimetallic strip 32 before exiting through the opposite terminal 34.
  • the open position of the contacts 20, 14, shown in FIG . 2 the circuit is interrupted.
  • the movable contact arm 22 extends beyond the articulation (fixed pivot 24) and at its end 36 opposite the contact 20 is anchored a tension spring 38 whose opposite end 40 is anchored to a pivoting lever or balance 42 mounted for rotation on a fixed axis 44 integral with the housing 12.
  • the spring 38 exerts on the contact arm 22 a moment tending to rotate the arm 22 in the trigonometric direction in bearing on the movable contact 20 on the fixed contact 14.
  • the lever 42 is pivoted, in the trigonometric direction indicated by arrow 0 in fig.
  • a trigger mechanism 50 having an electromagnetic trigger with a coil 28 and a thermal bimetal trigger 32.
  • a plunger core 52 Inside the coil 28 is slidably mounted a plunger core 52, cooperating in the attracted position with a striker 54 pivoting a trigger bar 56.
  • the plunger core 52 carries an extractor 58 whose head 60 strikes and pulls the contact arm 22 in the open position during an attraction of the plunger core 52.
  • the bimetallic strip 32 cooperates with the trigger bar 56 in the event of an overload (see fig. 3), so as to pivot the latter clockwise and to release a catch 62 from a hook 64 mounted for rotation on a fixed pivot 66 of the housing 12.
  • the hook 64 in the form of a bent lever carries at its opposite end a slide 68 in which is engaged a finger 70 secured to a lever 72 of a toggle 74.
  • the finger 70 is also engaged in a slide era 76 carried by one of the arms of a lever or of a pivoting part 78 mounted for free rotation on the pivot 24 coaxially with the contact arm 22.
  • the part 78 has two other arms, one of which carries at its end a stop 80 for actuating the contact arm 22, and the other of which cooperates at its end 82 with a spiral spring 84 for triggering.
  • the second lever 86 of the toggle joint 74 belongs to a reset lever 88 rotatably mounted on a fixed pivot 90.
  • a return spring 92 biases the lever 88 counterclockwise, the stroke of the lever 88 being limited by stops formed by the ends of the window for passage of the lever 88 through the housing 12.
  • the spring 84 tends to rotate the part 78 clockwise, this rotation being prevented by the toggle joint 74 which is in a position beyond dead center preventing any movement towards the high in the figure of the finger 70 under the action of the slide 76.
  • the stop 80 is separated from the contact arm 22 by a clearance “j” preventing any action on the contact arm 22 in the closed position of the contacts 14, 20.
  • FIGS. 3 and 4 illustrate this tripping phase and the final opening on tripping position in which the hook 64 has returned to the hooked position under the action of a return spring 94.
  • the pivoting of the contact arm 22 under the action of the spring 84 causes the anchor point 36 to move and, after passing the neutral point corresponding to the alignment of the points 44, 36, 40, moves the lever pivoting 42 in the open position, shown in FIGS. 2 and 4.
  • the spring 84 maintains, by means of the pivoting part 78, the contact arm 22 in the open position independently of the remote control mechanism 48.
  • a remote control closing order which pivots the pivoting lever 42 clockwise remains ineffective on the contact arm 22 locked by the markedly greater force of the spring 84. As soon as the closing order is completed, the pivoting lever 42 is returned by the spring 38 to its initial opening position.
  • the reset of the trigger mechanism 50 is achieved by pivoting the lever 88 in the clockwise direction causing an extension of the toggle 74 with passing the neutral point forcing the finger 70 to slide in the slide 68 by pushing towards the bottom of the slide 76.
  • This displacement of the slide 76 implies a rotation of the part 78 in a counterclockwise direction against the force of the spring 84 towards the initial position of the stop 80.
  • the contacts 14, 20 are arranged laterally at the entrance to a breaking chamber with deionization plates 96, an arc guide 98 connected to the fixed contact 14 facilitating the displacement of the drawn arc between the separate contacts 14 , 20 to the breaking chamber 96 in the usual way in circuit breakers.
  • a 10 remote control block 100 having a molded housing 102 of the same profile is attached to the cut-off block 10 (FIG. 6).
  • an electromagnet 104 whose plunger core 106 acts on a pivoting lever 108 articulated by its end on a fixed point 109 of the housing 102.
  • the lever 108 carries a pusher 110 whose end cooperates selectively with shoulders 112, 114 of a rocker 116, rotatably mounted on a fixed axis 118. During this movement the pusher 110 pivots slightly against a restoring force supplied by a spring 120.
  • the lever 108 and the pusher 110 are returned to the original position ready for a new operation when the electromagnet 104 is energized. During this new operation the pusher 110 cooperates with the shoulder 114 to rotate the rocker 116 in the opposite direction. Such an operation is commonly used in remote control switches and there is no need to describe it in more detail.
  • the movement of the rocker 116 is transmitted by the linkage 122 to a pivoting lever 124 rotatably mounted on a fixed axis 126.
  • the pivoting lever 124 carries an arm 128, the end of which comprises a finger 130 passing through the adjoining walls of the housings 12 , 102, which straddles the pivoting lever or balance 42 of the cut-off block 10, so as to mechanically secure the balance 42 and the rocker 116.
  • the axes 44, 126 are sensiblememt aligned.
  • the molded housing 102 includes connection terminals 132 for the remote control actuation wires of the electromagnet 104.
  • the bimetallic strip 32 deflects to the right in FIG. 3 to rotate the trigger bar 56 in the release direction of the hook 64.
  • the hook 64 is also released during a short circuit detected by the coil 28 which attracts the plunger core 52 and pushes by the pusher 54 the trigger bar 56 in the direction of release of the hook 64.
  • the connection between the toggle joint 74 and the slide 76 is broken and the part 78 is rotated in a clockwise direction by the spring 84, the stop 80 pushing the movable contact arm 22 in the open position.
  • the large force of the spring 84 allows rapid movement of the movable contact arm 22 aided in the event of a short circuit by the action of the extractor 58 integral with the plunger core 52.
  • the spring 84 maintains the movable contact 22 in the open position independently of any remote control order, the spring 38 being unable to overcome the force of the spring 84.
  • the lever 88 In the open release position, shown in FIG. 4, the lever 88 has come to the open position while the hook 64 is again hooked . Putting the device back into service requires manual intervention, in this case resetting by tilting handle 88 in armed position.
  • the lever 88 During an intervention on the circuit it is possible to carry out the selection by moving, for example using a tool, the lever 88 from the armed position to the open position. This pivoting causes the toggle 74 to break and the stop 80 to pivot under the action of the spring 84. If the contacts 14, 20 are in the closed position they are automatically brought into the open position by the action of the stop 80 If the contacts 14, 20 were already in the open position, the stop 80 keeps the contact arm 22 in the open position preventing any closure of the contacts 14, 20, in particular by the remote control mechanism 48.
  • the position of the lever 88 in position open constitutes a reliable indication of the opening of the contacts 14, 20. Indeed, in the case of accidental welding of the contacts 14, 20 under the action of short-circuit current causing the triggering of the mechanism 50, the slide 76 maintained in position by the stop 80 in support of the contact arm 22 prevents movement of the lever 88 towards the open position.
  • the assembly is particularly simple and the fact that the remote control mechanism 48 and the trigger mechanism 50 work independently of one another makes it possible to adapt these mechanisms to their respective remote control and protection functions.
  • the assembly can be housed in a standard circuit breaker or miniature switch box for easy incorporation into a distribution box or panel.
  • control unit can be produced in a different way and include, for example, two electromagnets, one opening and the other closing, or any other mechanism for actuating the pivoting lever 42.
  • control block would be incorporated into the cut-off block, or that in which any manual operation would be excluded.

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  • Breakers (AREA)
  • Selective Calling Equipment (AREA)
  • Power Steering Mechanism (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (7)

1. Niederspannungs-Stromschaltgerät mit einem beweglichen Kontakt (20), der von einem schwenkbaren Kontaktarm (22) getragen wird und der in geschlossener Stellung mit einem feststehenden Kontakt (14) zusammenarbeitet, wobei der genannte Kontaktarm (22) der Wirkung einer Kippfeder (38) unterworfen ist, die den Kontaktarm wahlweise in zwei feste Stellungen bringt, eine Öffnungsstellung und eine Schliessstellung der Kontakte (14, 20) des Gerätes, und jegliche Zwischenstellung ausschliesst, und mit einem ferngesteuerten Mechanismus (48) von hoher Leistungsfähigkeit mit einem schwenkbaren Hebel (42), der mit der genannten Feder (38) zusammenarbeitet, um den genannten beweglichen Kontaktarm (22) plötzlich von der geschlossenen Stellung in die offene Stellung und umgekehrt zu schwenken in Folge eines ferngesteuerten Befehls, dadurch gekennzeichnet, dass es ausserdem einen automatischen Auslösemechanismus (50) aufweist für den Falll einer Überlast und/oder eines Fehlerstromes, mit einer Auslösefeder (84), deren Kraft höher als die der genannten Kippfeder (38) ist, und die mit dem genannten beweglichen Kontaktarm (22) zusammenarbeitet, um letzteren in die Öffnungsstellung zu bewegen und dabei einen Fehlerstrom zu bewältigen, und um den beweglichen Kontaktarm (22) in der Öffnungsstellungen zu halten, unabhängig von der Stellung des ferngesteuerten Mechanismus (48), so lange wie der Auslösemechanismus (50) in ausgelöster Stellung ist, und ein handbetätigtes Element (88) zum Wiederspannen des Auslösemechanismus (50), um in der gespannten Stellung des letzteren ein ferngesteuertes Schliessen des Gerätes zu ermöglichen.
2. Stromschaltgerät gemäss Anspruch 1, dadurch gekennzeichnet, dass die genannte Kippfeder (38) durch eines seiner Enden (36) mit dem genannten beweglichen Kontaktarm (22) verankert ist und durch das entgegengesetzte Ende (40) mit dem genannten Hebel (42), so dass ein Schwenken des Hebels (42) ein Versetzen des genannten Endes (36) hervorruft und ein Passieren des toten Punktes, welches ein Schwenken des beweglichen Kontaktarmes (22) bewirkt, und dass umgekehrt ein Schwenken des beweglichen Kontaktarmes (22), insbesondere durch Fehlerstromauslösung, beim Passieren des toten Punktes ein Schwenken des genannten Hebels (42) hervorruft.
3. Stromschaltgerät gemäss Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Wiederspann-Element (88) einen Schwenkgriff aufweist, der wahlweise eine gespannte Stellung und eine offene Stellung einnehmen kann, wobei der Griff automatisch in die offene Stellung versetzt wird, bei einem Öffnen der Kontakte (14, 20) bei Fehlerstromauslösung, wohingegen der Griff bei einer Schweissung der Kontakte (14, 20) in der eingeschalteten Stellung bleibt.
4. Stromschaltgerät gemäss Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass der genannte Auslösemechanismus (50) eine Sperrvorrichtung (62) aufweist, die in befreiter Stellung eine kinematische Verbindung (70, 74, 76) zerbricht zwischen dem genannten handbetätigten Element und einem Drehhebei (78), der unter der Wirkung der genannten Auslösefeder (84) auf den beweglichen Kontaktarm (22) wirkt, um letzteren entgegen der genannten Kippfeder (38), in eine feste Öffnungsstellung zu bewegen, wobei die genannte kinematische Verbindung (70, 74, 76) ein Kniegelenk (74) aufweist, dessen eines Ende auf dem genannten handbetätigten Element schwenkbar angebracht ist, und dessen anderes Ende (70) mit einer ersten Gleitschiene (76) zusammenarbeitet, die von dem genannten Drehhebel (78) getragen wird und die dabei von einer zweiten Gleitbahn (68) geführt wird, die mit einem Sperrvorrichtungshebel (64) verbunden ist.
5. Stromschaltgerät gemäss irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es einen Schaltblock (10) mit gegossenem Isoliergehäuse (12) aufweist, sowie einen ferngesteuerten Block (100) mit gegossenem Isoliergehäuse (102), das mit dem gegossenen Isoliergehäuse des Schalktblocks (10) verbunden werden kann, wobei der in dem Schaltblock (10) untergebrachte schwenkbare Hebel (42) mit einem ferngesteuerten elektromagnetischen Antrieb (104, 122) gekuppelt ist, der in dem ferngesteuerten Block (100) angeordnet ist.
6. Stromschaltgerät gemäss Anspruch 5, dadurch gekennzeichnet, dass der genannte Antrieb einen bistabilen Kipphebel (122) und einen bei jeder Erregung eine Zustandsänderung des genannten Kipphebels bewirkenden Elektromagnet (104) aufweist, sowie ein handbetätigtes Hilfssteuerungs-Element (124), das mit dem genannten Kipphebel (122) zusammenarbeitet, um das genannte Gerät zu öffnen oder zu schliessen.
7. Stromschaltgerät gemäss Anspruch 3, dadurch gekennzeichnet, dass das genannte Wiederspann-Element (88) ausgebildet ist für eine Betätigung durch ein Werkzeug von der gespannten Stellung in die geöffnete Stellung zur Öffnung und/oder Aufrechterhalten der genannten Kontakte (14,20) in der Öffnungsstellung, unabhängig von der Stellung des ferngesteuerten Mechanismus (48).
EP83402080A 1982-11-03 1983-10-25 Ferngesteuertes Stromschaltgerät Expired EP0108678B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83402080T ATE19838T1 (de) 1982-11-03 1983-10-25 Ferngesteuertes stromschaltgeraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8218551A FR2535520A1 (fr) 1982-11-03 1982-11-03 Appareil de coupure de courant telecommande
FR8218551 1982-11-03

Publications (2)

Publication Number Publication Date
EP0108678A1 EP0108678A1 (de) 1984-05-16
EP0108678B1 true EP0108678B1 (de) 1986-05-14

Family

ID=9278922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83402080A Expired EP0108678B1 (de) 1982-11-03 1983-10-25 Ferngesteuertes Stromschaltgerät

Country Status (10)

Country Link
US (1) US4532486A (de)
EP (1) EP0108678B1 (de)
JP (1) JPS5996626A (de)
AT (1) ATE19838T1 (de)
AU (1) AU556571B2 (de)
CA (1) CA1217804A (de)
DE (1) DE3363536D1 (de)
ES (1) ES8406788A1 (de)
FR (1) FR2535520A1 (de)
ZA (1) ZA838144B (de)

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Also Published As

Publication number Publication date
ZA838144B (en) 1985-02-27
FR2535520A1 (fr) 1984-05-04
AU2091783A (en) 1984-05-10
AU556571B2 (en) 1986-11-06
FR2535520B1 (de) 1985-01-18
JPH0349173B2 (de) 1991-07-26
JPS5996626A (ja) 1984-06-04
DE3363536D1 (en) 1986-06-19
ES526863A0 (es) 1984-08-01
US4532486A (en) 1985-07-30
CA1217804A (en) 1987-02-10
ES8406788A1 (es) 1984-08-01
EP0108678A1 (de) 1984-05-16
ATE19838T1 (de) 1986-05-15

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