WO2002082486A2 - Unite de declenchement thermomagnetique pour disjoncteur - Google Patents

Unite de declenchement thermomagnetique pour disjoncteur Download PDF

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Publication number
WO2002082486A2
WO2002082486A2 PCT/US2001/010327 US0110327W WO02082486A2 WO 2002082486 A2 WO2002082486 A2 WO 2002082486A2 US 0110327 W US0110327 W US 0110327W WO 02082486 A2 WO02082486 A2 WO 02082486A2
Authority
WO
WIPO (PCT)
Prior art keywords
trip
slide
indicator
circuit
overcurrent
Prior art date
Application number
PCT/US2001/010327
Other languages
English (en)
Inventor
Bhaskar T. Ramakrishnan
Roger Neil Castonguay
Original Assignee
General Electric Company
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 General Electric Company filed Critical General Electric Company
Priority to CNB018096417A priority Critical patent/CN100419933C/zh
Priority to MXPA02011861A priority patent/MXPA02011861A/es
Priority to PL364517A priority patent/PL200689B1/pl
Priority to HU0302359A priority patent/HU226013B1/hu
Priority to PCT/US2001/010327 priority patent/WO2002082486A2/fr
Priority to DE10196263T priority patent/DE10196263T5/de
Publication of WO2002082486A2 publication Critical patent/WO2002082486A2/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/2058—Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker
    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • 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
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee
    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • H01H2071/042—Means for indicating condition of the switching device with different indications for different conditions, e.g. contact position, overload, short circuit or earth leakage
    • 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
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/164—Heating elements

Definitions

  • the present invention relates generally to circuit breakers and more particularly to a circuit breaker employing a thermal-magnetic trip unit having an over centering mechanism for unlatching the circuit breaker operating mechanism and a trip flag system that discriminates between a short circuit trip and an overcurrent trip.
  • Circuit breakers typically provide protection against persistent overcurrent and against very high currents produced by short circuits. This type of protection is provided in many circuit breakers by a thermal-magnetic trip unit having a thermal trip portion, which trips the circuit breaker on persistent overcurrent conditions, and a magnetic trip portion, which trips the circuit breaker on short-circuit conditions.
  • the thermal magnetic trip unit In order to trip the circuit breaker, the thermal magnetic trip unit must activate an operating mechanism. Once activated, the operating mechanism separates a pair of main contacts to stop the flow of current in the protected circuit.
  • Conventional trip units act directly upon the operating mechanism to activate the operating mechanism.
  • the thermal trip portion In current thermal-magnetic trip unit designs, the thermal trip portion includes a bimetallic strip (bimetal), which bends at a predetermined temperature.
  • the magnetic trip portion includes an anvil disposed about a current carrying strap and a lever disposed near the anvil, which is drawn towards the anvil when high, short-circuit currents pass through the current carrying strap.
  • the force created by the bimetal or lever, and the distance that they travel, may be insufficient to directly trip the operating mechanism.
  • a conventional way to solve this problem is to use a latch system as a supplemental source of energy.
  • the drawback of a latch system is the use of latching surfaces, which degenerate over repeated use.
  • a circuit breaker having a thermal-magnetic trip unit can be tripped by three events, namely: overcurrent, short circuit and ground fault. It is important to know the cause due to which a breaker has tripped. Distinguishing the reasons for tripping allows the user to determine if the breaker can be reset immediately, as in the case of an overcurrent, or only after careful inspection of the circuitry, as in the case of a short circuit or ground fault.
  • Circuit breaker trip mechanisms of the prior art have solved this problem by the use of flags, which are visible through windows disposed in the case of the circuit breaker.
  • a flag appears in one window upon the occurrence of an overcurrent condition, while another flag appears in another window upon the occurrence of a short-circuit condition.
  • This solution works well for trip units having an inactive bimetal. That is, for trip units where the bimetal does not carry electrical current, but is attached to a current-carrying strap.
  • this solution can provide indeterminate indications when it is used with a trip unit having an active bimetal. That is, when it is used with a trip unit where the bimetal carries electrical current.
  • bimetal When such an active bimetal is used, it is possible during a short circuit event that, in addition to the magnetic trip portion, the bimetal also moves to expose the overcurrent flag, thereby leading to both the short-circuit and overcurrent flags being shown thus providing an indeterminate indication to the user.
  • a circuit breaker trip mechanism includes an over centering spring tripping linkage.
  • the trip unit consists of a trip bar having a first leg and a second leg.
  • the trip bar is rotatably mounted within the case about a first pivot where the first leg is adjacent to a bimetal mounted within the circuit breaker trip mechanism.
  • a link having a third leg and a fourth leg, is rotatably mounted within the case about a second pivot.
  • the second leg is pivotally engaged to the third leg of the link by a moveable pin which slides in a slot in the trip bar.
  • the fourth leg of the link is pivotally engaged to a slide by a moveable pin.
  • a slide projection extending outward from the slide is disposed between the first end and the second end of the slide. Further, the link is biased in a first direction about second pivot when the trip unit is in a reset condition and biased in a second direction about pivot when the trip bar is rotated about first pivot thereby urging the slide to interact with the trip lever of the circuit breaker operating mechanism.
  • an improved indication-of-trip system comprising a two-piece trip bar mechanism.
  • visual confirmation of the cause of the trip is provided.
  • This embodiment includes a second trip bar having a fifth and sixth leg.
  • the second trip bar is rotatably mounted within the case about a third pivot.
  • a second link, having a seventh leg and an eighth leg, is rotatably mounted within the case about a fourth pivot.
  • the sixth leg is pivotally engaged to the seventh leg of the second link by a moveable pin.
  • the eighth leg of the second link is pivotally engaged to a second slide by a moveable pin.
  • a slide projection extending outward from the second slide is disposed between the third end and the fourth end of the second slide.
  • the second link is biased in a first direction about the fourth pivot when the trip unit is in a reset condition and biased in a second direction about the fourth pivot when the second trip bar is rotated about the third pivot thereby urging the second slide to interact with the trip lever of the circuit breaker operating mechanism.
  • the circuit breaker casein this embodiment of the invention includes a window disposed in the case in a location conducive to a user viewing a position indicator thus enabling the rapid determination of the type of trip that has occurred.
  • an overcurrent indicator is employed with the first trip bar whereby the indicator senses the bimetallic force applied on the heat sensitive bimetal.
  • a short circuit indicator is employed with the second trip bar whereby the indicator senses the magnetic force applied to the improved indicator of trip bar system.
  • Figure 1 is a perspective view of a circuit breaker
  • Figure 2 is an exploded view of the circuit breaker of Figure 1;
  • Figure 3 is an illustration of the circuit breaker of Figure 1 employing the spring trip unit;
  • Figure 4 is an illustration of the indication of trip two-piece trip bar system
  • Figure 5 is an enlarged view of the second trip bar linkage of Figure 4.
  • Figure 6 is an enlarged view of the position indicator and flag system of Figure 4.
  • Circuit breakers of this type have an insulated case 11 and a mid-cover 12 that house the components of the circuit breaker 9.
  • a handle 20 extending through a cover 14 gives the operator the ability to turn the circuit breaker 9
  • circuit breaker 9 in Figure 1 shows a typical three phase configuration, however, the present invention is not limited to this configuration but may be applied to other configurations, such as one, two or four phase circuit breakers.
  • the handle 20 is attached to a circuit breaker operating mechanism 10.
  • the circuit breaker operating mechanism 10 is coupled with a center cassette 16B and is connected with outer cassettes 16A and 16C by a drive pin 18.
  • the cassettes 16 A, 16B, and 16C along with the circuit breaker operating mechanism 10 are assembled into the base 2 and retained therein by the mid-cover 12.
  • the mid-cover 12 is connected to the base by any convenient means, such as screws 26, snap-fit (not shown) or adhesive bonding (not shown).
  • a cover 14 is attached to the mid-cover 12 by screws 28.
  • the trip unit 22 is assembled into the base 2 along with the cassettes 16. Straps 23 A, 23B, and 23C conduct current from the power source to the protected circuit.
  • the internal operating mechanism 160 of the trip unit 22 is shown in
  • the trip unit 22 consists of a trip bar (first trip bar) 30 having a first leg 33 and a second leg 64.
  • the trip bar 30 is rotatably mounted within the case 11 about a first pivot 32.
  • Link (first link) 34 is rotatably mounted within the case 11 about a second pivot 86.
  • Link 34 includes a third leg 88 and a fourth leg 90, both extending from second pivot 86.
  • the second leg 64 of the trip bar 30 is pivotally engaged to the third leg 88 of link 34, for example by a moveable pin 36 which slides in a slot 31 in the trip bar 30.
  • a slide 38 has a first end 70 and a second end 67.
  • the fourth leg 90 of link 34 is pivotally engaged to the first end 70 of the slide (first slide) 38, for example by a moveable pin 40.
  • a slide projection 39 extending outward from slide 38 is disposed between the first end 70 and the second end 67 of the slide 38.
  • link 34 is biased in a first direction about pivot 86 when the trip unit is in a reset condition and biased in a second direction about second pivot 86 when the trip bar 30 is rotated about first pivot 32 thereby urging the slide 38 to interact with the trip lever 92 of the circuit breaker operating mechanism 10.
  • a first spring 42 having moveable and fixed ends and preferably connecting between a moveable pin 36 and a fixed pin 76 attached to the case 11. The moveable end of the first spring 42 is attached to the third leg 88.
  • First spring 42 as shown in Figure 3 is arranged to bias the slide 38 away from the trip lever 92.
  • the ends of the first spring 42 are pivoted with respect to first pivot 32, such that, it initially provides a counterclockwise moment on the trip bar 30 to prevent nuisance tripping.
  • a heat sensitive strip for example a bimetal, 84, having a first end 60 and a second end 62, is attached at the first end 60 to the strap 23B by a screw 44. While this attachment is shown as a screw, any process commonly used in circuit breaker manufacturing can be used, such as brazing or welding.
  • the second end 62 of the bi-metal 84 is adjacent to the first leg 33 of the trip bar 30. While only one bimetal is shown here for clarity, a corresponding bimetal would be attached to the adjoining straps 23A and 23C.
  • a lever 48 having a first end 68 and a second end 72 is mounted within the case 11 and pivots about a pin 49.
  • the lever 48 is made of a ferrous material.
  • a ferrous plate 50 is mounted on the first end 68 of the lever 48.
  • An anvil 46 preferably U-shaped, is positioned around the strap 23B adjacent to the first end 68 of the lever 48. The anvil 46 generates a magnetic field in proportion to the current level.
  • the second end 72 of the lever 48 is adjacent the slide projection 39.
  • a second spring 80 connects between a pin 74 connected to the case 11 and a pin 82 located on the lever 48. Second spring 80 is arranged to bias the lever 48 away from the slide projection 39 as shown in Figure 3.
  • the strap 23B When an overcurrent condition occurs, the strap 23B generates heat that increases the temperature of the bimetal 84. If the temperature of the bimetal 84 increases sufficiently, due to the current draw exceeding a predefined current level, the second end 62 of the bimetal 84 deflects from an initial position thereby engaging the trip bar 30.
  • the trip bar 30 rotates in the clockwise direction in response to the bimetal force rotatably engaging link 34.
  • Link 34 rotates in a counter-clockwise direction about second point 86 pushing the slide 38 from the reset position as shown in Figure 3 to the released position towards trip lever 92 (the released position is shown in phantom lines).
  • the first spring 42 changes with respect to first pivot 32, providing a moment that rotates the trip bar 30 in the clockwise direction.
  • the first spring 42 takes over from the bimetal 84 and provides the required force and motion so that the slide 38 can engage the trip lever 92 thereby tripping the mechanism 10.
  • the ratio between the lengths of third and fourth legs 88 and 90 provides for the magnification of the linear motion of the slide 38 relative to the movement of the trip bar 30 due to the force applied by the bimetal 84.
  • the linear movement of the slide 38 will generally be greater than the movement of the trip bar 30.
  • a magnetic field in the anvil 46 is generated proportional to the current passing through strap 23B.
  • the magnetic force attracting the ferrous plate 50 of the lever 48 is greater than a predetermined level, the first end 68 of the lever 48 is attracted to the anvil 46 causing the second end 72 to engage the slide projection 39 thereby moving the slide 38 to the released position towards trip lever 92 (the released position is shown in phantom lines).
  • the first spring 42 changes with respect to first pivot 32, providing a moment that rotates the trip bar 30 in the clockwise direction.
  • an improved indication-of-trip system comprising a two piece trip bar mechanism.
  • visual confirmation of the cause of the trip is provided.
  • the first trip bar mechanism includes the trip bar 30, the link 34, and the slide 38 as described hereinabove.
  • the second trip bar mechanism includes a second trip bar 94, a second link 100 and a second slide 104.
  • the first trip bar mechanism senses the bimetallic force and the second trip bar senses the magnetic force.
  • the internal operating mechanism 160 of the improved indication-of- trip system used in trip unit 22 is shown in Figure 4.
  • the trip unit 22 consists of a trip bar 30 having a first leg 33 and a second leg 64.
  • the trip bar 30 is rotatably mounted within the case 11 about a first pivot 32.
  • Link 34 is rotatably mounted within the case 11 about a second pivot 86.
  • Link 34 includes a third leg 88 and a fourth leg 90, both extending from second pivot 86.
  • the second leg 64 of the trip bar 30 is pivotally engaged to the third leg 88 of link 34, for example by a moveable pin 36 which slides in a slot 31 in the trip bar 30.
  • a slide 38 has a first end 70 and a second end 67.
  • the fourth leg 90 of link 34 is pivotally engaged to the first end 70 of the slide 38, for example by a moveable pin 40.
  • link 34 is biased in a first direction about pivot 86 when the trip unit is in a reset condition and biased in a second direction about pivot 86 when the trip bar 30 is rotated about first pivot 32 thereby urging the slide 38 to interact with the trip lever 92 of the circuit breaker operating mechanism 10.
  • the first spring 42 having moveable and fixed ends and preferably connecting between a moveable pin 36 and a fixed pin 76 attached to the case 11. The moveable end of the first spring 42 is attached to the third leg 88.
  • First spring 42 as shown in Figure 3 is arranged to bias the slide 38 away from the trip lever 92.
  • the ends of the first spring 42 are pivoted with respect to first pivot 32, such that, it initially provides a counterclockwise moment on the trip bar 30 to prevent nuisance tripping.
  • the trip unit 22 also consists of a second trip bar 94 having a fifth leg 96 and a sixth leg 98.
  • the second trip bar 94 is rotatably mounted within the case 11 about a third pivot 144.
  • Second link 100 is rotatably mounted within the case 11 about a fourth pivot 148. It is within the scope of this embodiment of the present invention and apparent to those skilled in the art that both trip bar 30 and second trip bar 94 could be modified to rotate about first pivot 32, independent of each other.
  • Second link 100 includes a seventh leg 128 and an eighth leg 130, both extending from fourth pivot 148.
  • both link 34 and second link 100 could be modified to rotate about second pivot point 86, independent of each other.
  • the sixth leg 98 of the trip bar 94 is pivotally engaged to ⁇ the seventh leg 128 of second link 100, for example by a moveable pin 136 which slides in a slot 152 of the second trip bar 94.
  • Second slide 104 has a third end 102 and a fourth end 106.
  • the eighth leg 130 of second link 100 is pivotally engaged to the third end 102 of the second slide 104, for example by a moveable pin 150.
  • a slide projection 140 extending outward from second slide 104 is disposed between the third end 102 and the fourth end 106 of the second slide 104.
  • second link 100 is biased in a first direction about fourth pivot 148 when the trip unit is in a reset condition and biased in a second direction about fourth pivot 148 when the trip bar 94 is rotated about third pivot 144 thereby urging the second slide 104 to interact with the trip lever 92 of the circuit breaker operating mechanism 10.
  • a third spring 138 having moveable and fixed ends and preferable connecting between the moveable pin 136 and a fixed pin 158 attached to the case 11.
  • the moveable end of the third spring 138 is attached to the seventh leg 128.
  • the third spring 138 as shown in Figure 4 is arranged to bias the second slide 104 away from the trip lever 92.
  • the ends of the spring are pivoted with respect to third pivot 144, such that, it initially provides a counter-clockwise moment on the second trip bar 94 to prevent nuisance tripping.
  • a heat sensitive strip for example a bimetal, 84, having a first end 60 and a second end 62, is attached at the first end 60 to the strap 23B by a screw 44. While this attachment is shown as a screw, any process commonly used in circuit breaker manufacturing can be used, such as brazing or welding.
  • the second end 62 of the bimetal 84 is adjacent to the first leg 33 of the trip bar 30. While only one bimetal is shown here for clarity, a corresponding bimetal would be attached to the adjoining straps 23A and 23C.
  • a lever 48 having a first end 68 and a second end 72 is mounted within the case 11 and pivots about a pin 49.
  • the lever 48 is made of a ferrous material.
  • a ferrous plate 50 is mounted on the first end 68 of the lever 48.
  • An anvil 46 preferably U-shaped, is positioned around the strap 23B adjacent to the first end 68 of the lever 48. The anvil 46 generates a magnetic field in proportion to the current level.
  • the second end 72 of the lever 48 is adjacent the slide projection 140.
  • a second spring 80 connects between a pin 74 connected to the case 11 and a pin 82 located on the lever 48. Second spring 80 is arranged to bias the lever 48 away from the slide projection 140.
  • the strap 23B When an overcurrent condition occurs, the strap 23B generates heat that increases the temperature of the bimetal 84. If the temperature of the bimetal 84 increases sufficiently due to the current draw exceeding a predefined current level, the second end 62 of the bimetal 84 deflects from an initial position thereby engaging the trip bar 30. The deflection is proportional to the current level.
  • the trip bar 30 rotates in the clockwise direction in response to the bimetal force rotatably engaging link 34.
  • Link 34 rotates in a counter-clockwise direction about point 86 pushing the slide 38 to the released position towards trip lever 92 (the released position is shown in phantom lines).
  • the first spring 42 changes with respect to first pivot 32, providing a moment that rotates the trip bar 30 in the clockwise direction.
  • the first spring 42 takes over from the bimetal 84 and provides the required force and motion so that the slide 38 can engage the trip lever 92 thereby tripping the mechanism 10.
  • the ratio between the lengths of third and fourth legs 88 and 90 provides for the magnification of the linear motion of the slide 38 relative to the movement of the trip bar 30 due to the force applied by the bimetal 84.
  • the linear movement of the slide 38 will generally be greater than the movement of the trip bar 30.
  • a magnetic field in the anvil 46 is generated proportional the current passing through strap 23B.
  • the magnetic force attracting the ferrous plate 50 of the lever 48 is greater than a predetermined level, the first end 68 of the lever 48 is attracted to the anvil 46 causing the second end 72 to engage the slide projection 140 thereby moving the second slide 104 to the released position towards trip lever 92 (the released position is shown in phantom lines).
  • a third spring 138 changes with respect to third pivot 144, providing a moment that rotates the trip bar 94 in the clockwise direction.
  • third spring 138 takes over from the lever 48 and moves the second slide 104 engaging the trip lever 92 and thereby tripping the mechanism 10.
  • the ratio between the lengths of the seventh and eighth legs 128 and 130 provides for the magnification of the linear motion of the slide 38 relative to the movement of the trip bar 94 due to the force applied by the lever 48.
  • the linear movement of the slide 38 will generally be greater than the movement of the trip bar 94.
  • the case 11 in this embodiment of the invention includes a window 124 disposed therein in a location conducive to a user viewing an identification flag on the end of a position indicator thus enabling the rapid determination of the type of trip that has occurred.
  • a position indicator (overcurrent indicator) 120 is employed.
  • the overcurrent indicator 120 carries the first flag (overcurrent flag) 132 and senses the bimetallic force applied on the bimetal which is heat sensitive.
  • a position indicator (short circuit indicator) 122 is employed.
  • the short circuit indicator 122 caries the second flag (short circuit flag) 134 and senses the magnetic force applied to the improved indicator of trip bar system.
  • the overcurrent indicator 120 and flag 132 are viewable through the window 124 for indicating a tripped position which occurs when the current path is interrupted in response to a trip event caused by overheating.
  • the overcurrent indicator 120 is located some distance between the first end 70 and second end 67 of the first slide 38.
  • the short circuit indicator 122 and second flag 134 are viewable through the window 124 for indicating a tripped position which occurs when the current path is interrupted in response to a short circuit.
  • the short circuit indicator 122 is located some distance between the third end 102 and fourth end 106 of the second slide 104.
  • the first slide 38 moves to expose the first flag 132 through the window 124 of the case 11. If a short circuit event occurs, only the second slide 104 moves to expose the second flag 134 through the window 124 of the case 11.
  • the bimetal 84 also engages the trip bar 30. In this instance the first flag 132 would be exposed thereby leading to a false indication as to the cause of the trip.
  • the second flag 134 is located at a plane higher that the first flag 132.
  • the overcurrent indicator 120 is shorter in length than the short circuit indicator 122.
  • the second flag 134 has an extended top surface which completely overlaps the first flag 132. Therefore, during a short circuit event, only the second flag 134 is seen from the window 124 thereby preventing a false indication of what caused the trip event.
  • a position indicator 120 and 122 may also be utilized on the slide 38 to indicate a trip caused by overheating or a short circuit.
  • the advantage of the over centering spring tripping mechanism is that it eliminates the requirement for latching surfaces which degenerate with repeated use. In addition, the mechanism provides the additional force and motion required to trip a circuit breaker.
  • the two-piece trip bar and position indicator flag system discriminates between a trip caused by over heating and a trip caused by a short circuit.
  • the position indicator and flag system does not mislead the user when a short circuit event has occurred. When a short circuit event has occurred, only the second flag 134, and not the first flag 132, is visible from the window 124 of the case 11.

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  • Breakers (AREA)

Abstract

L'invention concerne une unité de déclenchement thermomagnétique (22), adaptée à une utilisation dans un disjoncteur (9), rendant inutile la présence de surfaces de verrouillage mais fournissant la force et le mouvement supplémentaires nécessaires au déclenchement du disjoncteur (9) pendant un court-circuit ou pendant un événement de déclenchement de surintensité. L'unité de déclenchement (22) comprend un maillon (34) qui est sollicité en fonction de la position d'une barre de déclenchement (30). Un ressort (42) sollicite le maillon (34) dans une première direction lorsque l'unité de déclenchement (22) est à l'état de réarmement, et dans une seconde direction lorsque la barre de déclenchement (30) est orientée autour d'un point de pivotement (32). L'unité de déclenchement (22) comprend également un système indicateur du déclenchement amélioré qui est composé d'un mécanisme à barre de déclenchement à deux pièces et d'un système repère qui permet de distinguer les défauts de court-circuit et les défauts de surintensité. Le mode de réalisation décrit dans cette invention permet d'obtenir une confirmation visuelle de la cause du déclenchement. Le boîtier (11) du disjoncteur (9) susmentionné comprend une fenêtre (124) ménagée dans ledit boîtier à un emplacement qui facilite la visualisation, par l'utilisateur, d'un repère d'identification (132, 134), ce qui permet de déterminer plus rapidement le type de déclenchement qui s'est produit. Pour identifier un déclenchement provoqué par un état de surintensité, un premier repère (132) est utilisé. Pour identifier un déclenchement provoqué par un état de court-circuit, un second repère (134) est utilisé. Si un événement de surintensité se produit, la première glissière (38) de la barre de déclenchement bouge de manière à exposer le premier repère (132). Si un événement de court-circuit se produit, seule la seconde glissière (104) de la barre de déclenchement bouge de manière à exposer le second repère (134).
PCT/US2001/010327 2001-03-29 2001-03-29 Unite de declenchement thermomagnetique pour disjoncteur WO2002082486A2 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CNB018096417A CN100419933C (zh) 2001-03-29 2001-03-29 断路器的热-磁自动分离装置
MXPA02011861A MXPA02011861A (es) 2001-03-29 2001-03-29 Unidad de desconexion termo magnetica de un interruptor de circuito.
PL364517A PL200689B1 (pl) 2001-03-29 2001-03-29 Termiczno-magnetyczny zespół wyzwalający wyłącznika automatycznego i wyłącznik automatyczny z termiczno-magnetycznym zespołem wyzwalającym
HU0302359A HU226013B1 (en) 2001-03-29 2001-03-29 Circuit breaker thermal magnetic trip unit
PCT/US2001/010327 WO2002082486A2 (fr) 2001-03-29 2001-03-29 Unite de declenchement thermomagnetique pour disjoncteur
DE10196263T DE10196263T5 (de) 2001-03-29 2001-03-29 Thermisch-magnetische Auslöseeinheit für einen Schalter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2001/010327 WO2002082486A2 (fr) 2001-03-29 2001-03-29 Unite de declenchement thermomagnetique pour disjoncteur

Publications (1)

Publication Number Publication Date
WO2002082486A2 true WO2002082486A2 (fr) 2002-10-17

Family

ID=21742455

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/010327 WO2002082486A2 (fr) 2001-03-29 2001-03-29 Unite de declenchement thermomagnetique pour disjoncteur

Country Status (6)

Country Link
CN (1) CN100419933C (fr)
DE (1) DE10196263T5 (fr)
HU (1) HU226013B1 (fr)
MX (1) MXPA02011861A (fr)
PL (1) PL200689B1 (fr)
WO (1) WO2002082486A2 (fr)

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CN100395856C (zh) * 2006-01-27 2008-06-18 上海电器科学研究所（集团）有限公司 热磁式脱扣器及其脱扣原因指示装置
KR100823144B1 (ko) * 2006-03-29 2008-04-21 새턴정보통신(주) 이상전류의 차단 및 리셋 기능이 구성된 차단기
CN101409182B (zh) * 2007-10-12 2012-07-18 河村电器产业株式会社 电路断开器
CN102347171B (zh) * 2010-07-30 2014-03-26 上海良信电器股份有限公司 热磁脱扣器的故障判别指示装置
CN103456577B (zh) * 2012-05-30 2015-12-23 施耐德电器工业公司 热磁脱扣器和断路器
US8829381B2 (en) * 2012-06-18 2014-09-09 Schneider Electric USA, Inc. High interrupting rating molded case circuit breaker
FR2998415B1 (fr) * 2012-11-19 2015-01-16 Schneider Electric Ind Sas Declencheur magnetothermique de declenchement d'un disjoncteur polyphase
EP2905800A1 (fr) * 2014-02-11 2015-08-12 Siemens Aktiengesellschaft Dispositif de déclenchement thermique, dispositif de commutation, disjoncteur magnétique thermique et procédé de protection d'un circuit électrique contre les dégâts
FR3023969B1 (fr) * 2014-07-17 2017-12-22 Schneider Electric Ind Sas Dispositif de signalisation d'un defaut electrique dans un appareil de protection electrique, et appareil comportant un tel dispositif
JP6661058B2 (ja) * 2017-07-26 2020-03-11 三菱電機株式会社 遮断器

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DE19849393A1 (de) * 1998-10-27 2000-05-04 Abb Patent Gmbh Schaltgerät mit einer Stellungs- oder Zustandsanzeige, insbesondere für einen Leitungsschutzschalter

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MXPA02011861A (es) 2003-05-21
PL200689B1 (pl) 2009-01-30
DE10196263T5 (de) 2004-04-29
CN1429396A (zh) 2003-07-09
HU226013B1 (en) 2008-02-28
CN100419933C (zh) 2008-09-17
HUP0302359A2 (hu) 2003-10-28
PL364517A1 (en) 2004-12-13

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