EP4138111B1 - Elektrische schutzvorrichtung mit thermoauslöser, elektrische schalttafel mit einer solchen vorrichtung und verfahren zur regulierung einer solchen vorrichtung - Google Patents

Elektrische schutzvorrichtung mit thermoauslöser, elektrische schalttafel mit einer solchen vorrichtung und verfahren zur regulierung einer solchen vorrichtung

Info

Publication number
EP4138111B1
EP4138111B1 EP22188956.1A EP22188956A EP4138111B1 EP 4138111 B1 EP4138111 B1 EP 4138111B1 EP 22188956 A EP22188956 A EP 22188956A EP 4138111 B1 EP4138111 B1 EP 4138111B1
Authority
EP
European Patent Office
Prior art keywords
adjustment
housing
adjustment member
relative
configuration
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.)
Active
Application number
EP22188956.1A
Other languages
English (en)
French (fr)
Other versions
EP4138111A1 (de
Inventor
Inès MOUELHI
Pascal Escapa
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP4138111A1 publication Critical patent/EP4138111A1/de
Application granted granted Critical
Publication of EP4138111B1 publication Critical patent/EP4138111B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • H01H71/7436—Adjusting the position (or prestrain) of the bimetal
    • 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
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • the present invention relates to a thermally tripped electrical protection device and an electrical panel comprising such a protection device.
  • the invention also relates to a method for adjusting such an electrical protection device.
  • An electrical installation in a building typically includes an electrical panel, which connects the installation to a shared electricity distribution network and incorporates various devices for protecting, controlling, and monitoring the electrical system.
  • electrical protection devices is a circuit breaker, which protects the electrical installation, or a person, from an electrical fault in a circuit by opening the circuit.
  • the circuit breaker is tripped by an overload, a short circuit, or a residual current fault within that circuit.
  • such an electrical protection device includes a trip unit, which detects a predetermined type of electrical fault and, if necessary, triggers a switching mechanism to open the circuit.
  • a trip unit which detects a predetermined type of electrical fault and, if necessary, triggers a switching mechanism to open the circuit.
  • the trip unit considered here comprises a support on which a bimetallic strip is mounted. This strip heats up due to the Joule effect and deforms, thus opening the electrical circuit.
  • Such a trip unit is, by extension, called a "thermal trip unit.”
  • the thermal trip unit generally includes a calibration device.
  • the calibration must be secure; that is, after calibration, the thermal trip unit must not be able to become misaligned.
  • EP-1 643 530-A1 This describes, for example, a circuit breaker comprising a switching mechanism with a thermal trip unit, including a bimetallic strip fixed at one end to a support. When the bimetallic strip heats up and deforms, it triggers the switching mechanism via a connecting rod with an adjustable stop. This adjustable stop is not secured. Furthermore, the connecting rod is relatively bulky and remains complex to integrate into the housing of the electrical protection device.
  • DE-10 2017 101728-A1 For example, it describes a circuit breaker comprising a bimetallic strip connected to a bracket. An adjustment screw is provided to adjust the bracket's position and calibrate the circuit breaker. A movable rod is provided to prevent access to the adjustment screw after the circuit breaker has been calibrated.
  • the invention aims to address in particular, by offering a thermal trigger that is easier and more precise to calibrate.
  • the support further comprises an adjustment portion, separate from the fixing portion, while the adjustment member is configured to move the adjustment portion relative to the fixing portion, so as to adjust the position of the actuating end relative to the housing, the thermal trigger is configured, when the adjustment member is actuated, to deform the support elastically, and the electrical protection device comprises a locking device having selectively an engaged configuration, in which the locking device blocks the adjustment member and prevents the adjustment portion from moving relative to the fixing portion, and a released configuration, in which the adjustment member is not blocked.
  • the bimetallic strip support is elastically deformed, i.e., reversibly. This allows the calibration operation to be repeated if it is not satisfactory the first time, by adjusting the mechanism.
  • the electrical protection device is thus particularly easy to calibrate. This reduces the discard rate of electrical protection devices, resulting in cost savings. Since the calibration is reversible, the safety margin associated with calibration can also be reduced, and the thermal trip unit can be calibrated more precisely. Furthermore, a locking mechanism is provided to permanently lock the locking element in the corresponding position after calibration, preventing the thermal trip unit from malfunctioning during operation.
  • the invention also relates to an electrical panel, comprising a fixing rail and an electrical protection device fixed to this fixing rail, in which the electrical protection device is as described above.
  • FIG. 1 shows an electrical panel 10 conforming to the invention.
  • the electrical panel 10 is configured to be integrated into an electrical installation, equipping for example a building.
  • the electrical panel 10 is presented as a modular row.
  • this modular row can be combined with other modular rows.
  • Electrical panel 10 accommodates several electrical protection devices. Electrical panel 10 is modular, meaning that it is equipped with a variable number of electrical protection devices, depending on the needs of the electrical installation into which it is configured to be integrated, and that the electrical protection devices can be of several types.
  • electrical protection devices 12 of a first type and electrical protection devices 14 of a second type are represented.
  • the electrical panel 10 further includes a mounting rail 16, on which the electrical protection devices 12 and 14 are installed.
  • the fixing rail 16 extends along an axis of width X10 from the electrical panel 10.
  • the electrical protection devices 12 and 14 are juxtaposed along the axis of width X10.
  • a depth axis Y10 and a height axis Z10 of the electrical panel 10 which are perpendicular to each other and to the width axis X10.
  • the height axis Z10 is vertical and directed upwards.
  • the electrical panel 10 further includes a supply busbar 18, which extends along the width axis X10, which is connected to all the electrical protection devices 12 and 14 and which supplies electrical energy to the electrical protection devices, via connectors 20.
  • the connectors 20 are divided into several groups, with all the connectors in the same group being electrically connected to each other and electrically isolated from the connectors in the other groups.
  • the power supply comb 18 comprises four groups of connectors 20.
  • three groups are each connected to a power supply phase of the electrical panel 10 and one group is connected to a neutral conductor of the electrical panel.
  • the supply comb 18 includes a different number of connector groups 20, for example two connector groups, respectively connected to a supply phase and a neutral conductor.
  • the power supply comb 18 is positioned above the mounting rail 16, along the height axis Z10 of the electrical panel.
  • the housing 30 constitutes an essentially closed and electrically insulating enclosure.
  • the housing 30 advantageously comprises a front 32 and a back 34, distributed along the depth direction Y30, with the front 32 in the Y30 direction relative to the back 34.
  • the device 12 is advantageously designed to be fixed to the mounting rail 16 via the housing 30.
  • the device 12 advantageously includes, on its back 34, suitable fastening means, such as a snap-on clamp 36, configured to securely attach the device 12 to the rail 16, preferably by hand and without tools.
  • suitable fastening means such as a snap-on clamp 36
  • the X30 direction is parallel to the rail 16 and to the X10 axis
  • the Y30 direction is parallel to the Y10 axis
  • the Z30 direction is parallel to the Z10 axis.
  • the back 34 of the housing 30 of the electrical protection device 12 is directed towards the rail 16 and the front 32 is opposite the rail 16.
  • the housing 30 advantageously comprises a lower end 38 and an upper end 40 distributed along the direction Z30, with the upper end 40 in the direction Z30 relative to the lower end 38, the upper end 40 being arranged above the lower end 38 in the mounted configuration of the device 12 on the electrical panel 10.
  • the housing 30 advantageously comprises a right side 42 and a left side 44, preferably flat and parallel to each other, distributed along the width direction X30, with the left side 44 in the direction X30 relative to the right side, the left side 44 being arranged to the left of the right side 42 in the mounted configuration of the device 12 on the electrical panel 10.
  • the width of the device 12, measured along the X30 direction between the left side 44 and the right side 42, is between 15 mm and 25 mm, preferably also equal to 18 mm.
  • the front 32 and the back 34 each connect the right side to the left side, along the X30 direction.
  • Each side connects the back 34 to the front 32, along the Y30 direction.
  • the housing 30 includes an internal partition 46 visible on the figures 3 to 10 , which extends parallel to the Y30 and Z30 directions and separates an internal volume of the case 30 into a right-hand compartment 48, visible on the Figures 5 , 7 And 9 and in a left compartment 50, visible on the figures 3 , 4 , 6 , 8 And 10 .
  • an internal partition 46 visible on the figures 3 to 10 , which extends parallel to the Y30 and Z30 directions and separates an internal volume of the case 30 into a right-hand compartment 48, visible on the Figures 5 , 7 And 9 and in a left compartment 50, visible on the figures 3 , 4 , 6 , 8 And 10 .
  • the right compartment 48 and left compartment 50 are arranged along the width X30 direction.
  • the right compartment 48 is bounded by the partition 46 and the right side 42 along the X30 direction, by the ends 38 and 40 along the Z30 direction, and by the front 32 and the back 34 along the Y30 direction.
  • the left compartment 50 is bounded by the partition 46 and the left side 44 along the X30 direction, by the ends 38 and 40 along the Z30 direction, and by the front 32 and the back 34 along the Y30 direction.
  • the electrical protection device 12 is a bipolar device, in that it has two conduction paths.
  • each conduction path will have an input terminal, an output terminal, a moving contact and a fixed contact.
  • a first conduction path 60 comprises an input terminal 62, an output terminal 64, a moving contact 66 and a fixed contact 68, visible on the figures 3 , 6 And 8
  • a second conduction path 70 comprises an input terminal 72, an output terminal 74, a movable contact 76 and a fixed contact 78, visible on the Figures 5 , 7 And 9 .
  • each conduction path 60 and 70 are electrically isolated from each other.
  • each conduction path is essentially, if not entirely, located in one of the respective compartments 48 or 50 of the housing 30.
  • the first conduction path 60 is located in the left compartment 50 and the second conduction path 70 is located in the right compartment 48.
  • the internal partition 46 is interposed between the paths 60 and 70, so as to ensure that they are electrically isolated from each other.
  • the input terminals 62 and 72 are arranged at the upper end 40 of the housing 30, so that they can be electrically connected to the connectors 20 of the power comb 18 belonging to the electrical panel 10.
  • input terminal 62 is connected to a first connector 20 belonging to a first group of connectors of the power comb 18, while input terminal 72 is connected to a second connector 20 belonging to a second group of connectors of the power comb 18.
  • each input terminal 62 and 72 includes a cavity 80, configured to receive a connector 20, and a screw 82, configured to tighten the connector 20 against the corresponding input terminal so as to establish electrical continuity between the connector 20 and the corresponding input terminal.
  • the device 12 is connected to the power comb 18 simply by inserting the connectors 20 of the comb into the input terminals 62 and 72 and then tightening the screws 82.
  • input terminals 62 and 72, as well as output terminals 64 and 74 are screw terminals.
  • input terminals 62, 72 and/or output terminals 64, 74 are push-in terminals, also known as plug-in terminals, or quick-connect terminals.
  • Each conduction path 60 or 70 constitutes a separate pole of the device 12.
  • path 60 constitutes a neutral pole
  • path 70 constitutes a phase pole.
  • path 60 is connected to a neutral conductor of the electrical panel via a connector 20
  • path 70 is connected to a phase supplying the electrical panel via a connector 20.
  • each conduction path is intended to be carried at a separate potential.
  • the device 12 is designed for use under low voltage, i.e., a voltage between 100 V and 600 V, for example, a voltage of 240 V.
  • the two conduction paths 60 and 70 are phase conduction paths.
  • the output terminals 64 and 74 are preferably located at the lower end 38 of the housing 30, so that they can be electrically connected to an electrical circuit supplying loads, for example, in the case of a building, household appliances or lighting. These electrical loads are then supplied with the electrical energy provided at the input terminals 62 and 72 by the connectors 20 of the power busbar 18, through the device 12.
  • the input terminal 62 of the conduction path connected to a neutral conductor of the electrical panel is located at the lower end 38 of the enclosure 30, i.e., near the output terminals 64 and 74, and the conduction path 60 forms a loop within the enclosure.
  • three terminals are located at the lower end 38 of the enclosure, and only the input terminal 72 is located at the upper end 40 of the enclosure.
  • one of the three terminals is replaced by a pinning clamp, or by an electrical wire extending out of the housing 30.
  • the fixed contact 68 is fixed here relative to the housing 30, and is electrically connected to the input terminal 62.
  • the moving contact 66 is electrically connected here to the output terminal 64.
  • the fixed contact 68 is arranged in the direction Z30 relative to the moving contact 66.
  • the movable contact 66 preferably comprises a conductive end 90, which performs the electrical contact function and is electrically connected to the output terminal 64.
  • the movable contact 66 also comprises a contact holder 92, which carries the end 90.
  • the movable contact 66 pivots, relative to the housing 30, via the contact holder 92, about a movable contact axis X66, parallel to the width direction X30. This pivoting is performed between a conductive position, shown in the diagrams. figures 3 And 8 , and a position of isolation, shown on the figure 6 .
  • the conductive end 90 is in electrical contact with the fixed contact 68, which electrically connects the input terminal 62 to the output terminal 64.
  • the end 90 of the moving contact 66 is away from the fixed contact 68, so as to be electrically isolated from it, which breaks the electrical connection between the terminals 62 and 64, so that the terminals 62 and 64 are electrically isolated from each other.
  • the fixed contact 78 is fixed relative to the housing 30, and is electrically connected to the input terminal 72.
  • the moving contact 76 is electrically connected to the output terminal 74.
  • the fixed contact 78 is arranged in the direction Z30 relative to the moving contact 76.
  • the moving contact 76 preferably comprises a conductive end 94, which provides the electrical contact function and is electrically connected to the output terminal 74.
  • the moving contact 76 also comprises a contact holder 96, which carries the end 94.
  • the moving contact 76 pivots, relative to the housing 30, via the contact holder 96, about a movable contact axis.
  • the respective movable contact axes of the moving contacts 66 and 76 coincide; that is, the moving contact 76 pivots about the same axis as the moving contact 66, in other words, about the axis X66.
  • the moving contact axes of contacts 66 and 76 are parallel to each other, not coincident, and both parallel to the width direction X30.
  • the pivoting of contact 76 is performed between a conduction position, shown on the figure 5 , and a position of isolation, shown on the figure 7 .
  • the moving contacts 66 and 76 are advantageously pivotable relative to the housing independently. When they move from their respective conduction positions to their respective insulation positions, the moving contacts 66 and 76 advantageously rotate in the same direction around their respective moving contact axis, in this example around the X66 axis. In particular, the contact ends 90 and 94 are then displaced in the opposite direction to Z30, i.e. towards the output terminals 64 and 74, or towards the lower end 38 of the housing 30.
  • the conductive end 94 is in electrical contact with the fixed contact 78, which electrically connects the input terminal 72 to the output terminal 74.
  • the end 94 of the moving contact 76 is away from the fixed contact 78, so as to be electrically isolated from it, which breaks the electrical connection between the terminals 72 and 74, so that the terminals 72 and 74 are electrically isolated from each other.
  • the moving contact 76 is shown in an intermediate position between the conduction and isolation positions; that is, the conductive end 94 is away from the fixed contact 78, but the moving contact 76 is not in the isolation position. This intermediate position is obtained during the switching of the moving contact 76 from its conduction position to its isolation position.
  • the electrical protection device 12 includes a breaking chamber 100, which is shown complete on the figure 5 , and partially open to the figures 7 And 9 , to reveal its contents.
  • the breaking chamber 100 aims to provide breaking power to the device 12, by dissipating any electric arc that could occur when the moving contact 76 passes from the conduction position to the isolation position, i.e. when it moves away from the fixed contact 78.
  • the breaking chamber 100 is advantageously located in the right-hand compartment 48, between the fixed contact 78 and the input terminal 72, along the back 34 of the housing 30.
  • the breaking chamber 100 comprises, for example, a stack of metal plates 102, sometimes called fins or separators, placed at intervals, here along the Y30 direction, to extend and thus extinguish any potential electric arc.
  • the breaking chamber 100 advantageously includes insulating cheeks, not shown, between which the plates 102 are arranged.
  • the fixed contact 78 is preferentially extended by an arc horn 104, curved towards the stack of metal plates 102 of the cutting chamber 100.
  • the breaking chamber advantageously includes an arc horn 105, which is electrically connected to the conduction path 70, between the moving contact 76 and the output terminal 74.
  • the arc horn 105 is arranged opposite the arc horn 104.
  • any electric arc is conducted to the metal plates 102 via the arc horns 104 and 105, to be divided and extinguished within the breaking chamber 100.
  • the electrical protection device 12 further includes at least one trip unit.
  • the protection device includes three trip units 110, 112 and 114, configured to be excited each by an electrical fault of a distinct predetermined type and to switch the moving contacts 66 and 76 to the isolation position when they are excited.
  • the trip unit 110 is configured to be triggered by an electrical fault such as a short circuit, which may occur, for example, between conduction paths 60 and 70, or between conduction path 70 and ground.
  • the trip unit 110 is therefore triggered by a short circuit occurring downstream of output terminals 64 and 74, on the electrical circuit supplied through device 12, or on one of its loads. In this case, it is a phase-to-neutral or phase-to-ground short circuit.
  • the release 110 is located in the right-hand compartment 48, and connected in series on the conduction path 70.
  • the release 110 is located between the input terminal 72 and the fixed contact 78.
  • the release 110 is located between the breaking chamber 100 and the front 32 of the housing 30.
  • the release 110 is located between the right side 42 of the housing and the internal partition 46 of the housing.
  • the trigger 110 is sometimes called a magnetic trigger.
  • the trigger 110 takes the form of a magnetic actuator, which here comprises an electromagnetic winding 120 and a moving core 122.
  • the core 122 is visible only on the figure 9
  • the input terminal 72 is electrically connected to the fixed contact 78 via the release 110, specifically the electromagnetic winding 120.
  • the current flowing in the winding 120 becomes abruptly very high, so as to generate an electromagnetic force sufficient to move the moving core 122 from a rest position, shown on the Figures 5 And 7 , up to a triggered position, shown on the figure 9 , with respect to the housing 30.
  • the movement of the core 122 from the rest position to the triggered position is carried out in a direction opposite to the direction Z30, i.e., towards the lower end 38 of the housing.
  • the core 122 When the core 122 is moved to the triggered position, it causes the moving contacts 66 and 76 to rotate from their conduction position to their isolation position, thus interrupting the flow of an electric current between the input terminals 62 and 72 and the output terminals 64 and 74.
  • the electrical protection device 12 is shown in a configuration where the trip 110 is being tripped, i.e., when the core 122 is in the tripped position.
  • the moving contact 76 is no longer in the conduction position and has not yet reached the isolation position illustrated in the figure 7 and the mobile contact 66 has not yet left its conduction position.
  • the second trigger 112 visible on the Figures 5 , 7 And 9
  • the trip unit 112 is configured to be triggered by a predetermined type of electrical fault, namely an overload fault, which, for example, is likely to occur between conduction paths 60 and 70.
  • the trip unit 112 is therefore triggered, in particular, by an overload occurring downstream of output terminals 64 and 74, on the electrical circuit supplied through device 12, or on one of its loads. This type of fault can occur when one or more loads connected to this electrical circuit impose an excessive current demand.
  • the trigger 112 is located in the right-hand compartment 48, and connected in series on the conduction path 70.
  • the trigger 112 is located between the output terminal 74 and the moving contact 76.
  • the trigger 112 is located between the back 34 and the front 32 of the housing 30.
  • the trigger 112 is located between the right side 42 of the housing and the internal partition 46 of the housing.
  • Trigger 112 is sometimes called a thermal trigger. Specifically, trigger 112 takes the form of a thermal actuator, which is here formed by An electrically conductive and thermo-deformable bimetallic strip 113. When an electric current passes through the bimetallic strip 113, it heats up due to the Joule effect and deforms. When the bimetallic strip 113 is no longer subjected to an electric current and returns to room temperature, it resumes its initial shape and is in a so-called "resting" configuration, as shown in the diagram. Figures 5 , 7 And 9 .
  • the bimetallic strip 113 is connected in series with the moving contact 76 between the input terminal 72 and the output terminal 74.
  • the moving contact 76 is electrically connected to the output terminal 74 via the trip unit 112, i.e., here via the bimetallic strip 113.
  • a flexible braid 124 electrically connects the moving contact 76 to the trip unit 112.
  • the bimetallic strip 113 When, under the effect of an electric current flowing within the conduction path 70, the temperature of the bimetallic strip 113 exceeds a predetermined threshold, the bimetallic strip 113 deforms into a distorted configuration, represented in figure 11 and in which the bimetallic strip 113 switches the switching mechanism 150 into the open configuration and causes the moving contacts 66 and 76 to rotate from their conduction position to their isolation position, thus interrupting the flow of an electric current between the input terminals 62 and 72 and the output terminals 64 and 74.
  • the third trip unit 114 is configured to be activated by an electrical fault of another predetermined type, namely a differential fault, which is likely to occur between the conduction path 70 and ground.
  • Trip unit 114 is therefore activated, in particular, by a current leakage to ground, which would occur downstream of the output terminals 64 and 74, causing a difference between the current flowing within the conduction path 70 and the current flowing in the opposite direction within the conduction path 60.
  • the differential sensor 126 detects a differential current, which is equal to the difference between the current flowing in the first conduction path 60 and the current flowing in the second conduction path 70.
  • the release 114 extends into both compartments 48 and 50, passing through the internal partition 46. Following the direction Z30, the release 114 is advantageously positioned between, on the one hand, the output terminals 64 and 74, and on the other hand, the fixed contacts 68 and 78 and the moving contacts 66 and 76.
  • the trigger 114 is sometimes called a differential trigger.
  • the trigger 114 includes a differential sensor 126, which extends both in the compartments 48 and 50, being arranged along the back 34 of the case 30.
  • the trigger 114 also includes a relay 128, which extends only into the left compartment 50, being positioned between the front panel 32 and the differential sensor 126.
  • the relay 128 is shown open to reveal its contents, as an example.
  • the relay 128 here includes a plate 129, which pushes back a movable rod 130 when the relay 128 is activated by the differential sensor 126.
  • the differential sensor 126 includes, for example, a ferromagnetic toroid carrying two electromagnetic windings, one formed by the conduction path 60 and the other formed by the conduction path 70.
  • the electromagnetic winding of the conduction path 60 is advantageously formed by a portion of the path 60 between the moving contact 66 and the output terminal 64.
  • the electromagnetic winding of the path 70 is advantageously formed by a portion of the path 70 that connects the moving contact 76 to the output terminal 74, more precisely by a portion of the path 70 between the trigger 112 and the output terminal 74.
  • the moving contact 66 and the winding of the differential sensor 126 of the conduction path 60 are electrically connected by means of a braid, not shown.
  • a current difference is established between paths 60 and 70, beyond a certain threshold, an electromagnetic field is generated at the toroid of the differential sensor 126.
  • the differential sensor 126 is configured to generate electrical energy when the differential current is non-zero.
  • the relay 128 is configured to be activated when this electrical energy exceeds a certain threshold, which has the effect of releasing the plate 129 and activating the movement of the movable rod 130 belonging to the relay 128, from a rest position, shown in the figures 3 And 8 , up to a triggering position, not visible in the figures, relative to the housing 30.
  • the movement of the movable rod 130 from the rest position to the triggered position is carried out along the direction Z30, that is to say towards the upper end 40 of the housing 30.
  • the movable rod 130 Once the movable rod 130 has reached the triggered position, it must be brought back to the rest position to reset the relay 128 and thus allow the relay 128 to actuate the rod 130 again in the event of a differential fault, as explained below.
  • the movable rod 130 When the movable rod 130 is moved from its rest position to its triggered position, it causes the movable contacts 66 and 76 to rotate from their conduction position to their isolation position, thus interrupting the flow of an electric current between the input terminals 62 and 72 and the output terminals 64 and 74.
  • the electrical protection device 12 also includes a switching mechanism 150.
  • the switching mechanism 150 is housed in casing 30, partly in compartment 48 and in compartment 50.
  • the switching mechanism 150 is configured to switch between an armed configuration, shown on the figures 3 to 5 And 10 , in which mechanism 150 places the two moving contacts 66 and 76 in the conduction position, and a triggered configuration, shown on the figures 6 And 7 , in which the switching mechanism 150 puts the moving contacts 66 and 76 in the isolation position.
  • the switching mechanism 150 includes a bracket 152, visible on the figures 3 to 10
  • the bracket 152 pivots relative to the housing 30 around a bracket axis X152, parallel to the movable contact axis X66.
  • the bracket 152 extends into both compartments 48 and 50, being supported by the internal partition 46, straddling it.
  • the bracket 152 When the mechanism 150 is in the armed configuration, the bracket 152 is in a first orientation, called the “armed position,” relative to the housing 30, around the axis X152. When the mechanism 150 is in the disengaged configuration, the bracket 152 is in a second orientation, called the “disengaged position,” around the axis X152. The mechanism 150 actuates the moving contacts 66 and 76 via the bracket 152.
  • the stirrup 152 comprises a plate 154, located in the left compartment 50, and a counter-plate 156, located in the right compartment 48.
  • the plate 154 and the counter-plate 156 are positioned on either side of the internal partition 46 and each pivots around the stirrup axis X152.
  • the plate 154 and the counter-plate 156 are fixedly connected by a connecting shaft 158, so that any rotational movement of the plate 154 around the stirrup axis X152 results in an identical rotational movement of the counter-plate 156 around the stirrup axis X152, and vice versa.
  • the stirrup axis X152 is also an axis of the plate 154, around which the plate 154 pivots.
  • the plate 154 is said to be in the open position, respectively the closed position, when the stirrup 152 is in the armed position, respectively the triggered position.
  • the plate 154 of the yoke 152 includes, for example, a cam 160, located in the left-hand compartment 50, by means of which the yoke 152 drives the moving contact 66 of the first conduction path 60 from the conduction position to the isolation position, when the yoke 152 is pivoted from the armed position to the tripped position.
  • the cam 160 bears against the contact holder 92 of the contact mobile 66.
  • the plate 154 is configured so that, when the plate 154 moves from its closed position to its open position, it moves the first contact 66 from its conduction position to its isolation position.
  • the switching mechanism 150 advantageously includes a spring 162, called the "contact spring”, which is disposed in the left compartment 50, bearing both on the plate 154 of the yoke 152 and on the moving contact 66, more precisely on the contact holder 92.
  • the contact spring which is disposed in the left compartment 50, bearing both on the plate 154 of the yoke 152 and on the moving contact 66, more precisely on the contact holder 92.
  • the spring 162 is expected to apply force to the contact 66, bearing against the plate 154, preferably the cam 160, which tends to press the moving contact 66 against the fixed contact 68 when the caliper 152 is in the armed position. This force ensures satisfactory contact pressure between the moving contact 66 and the fixed contact 68.
  • the counterplate 156 of the yoke 152 includes, for example, a cam 164, located in the right-hand compartment 48, by means of which the yoke 152 drives the moving contact 76 of the second conduction path 70 from the conduction position to the isolation position, when the yoke 152 is pivoted from the armed position to the tripped position.
  • the cam 164 bears against the contact holder 96 of the moving contact 76.
  • the switching mechanism 150 advantageously includes a spring 166, called the "contact spring”, which is located in the right compartment 48, bearing both on the counter plate 156 of the yoke 152 and on the moving contact 76, more precisely on the contact holder 96.
  • the contact spring which is located in the right compartment 48, bearing both on the counter plate 156 of the yoke 152 and on the moving contact 76, more precisely on the contact holder 96.
  • the contact spring 166 is expected to apply force to the contact 76, bearing against the counter-plate 156, preferably against the cam 164, which tends to press the moving contact 76 against the fixed contact 78 when the caliper 152 is in the cocked position. This force ensures satisfactory contact pressure between the moving contact 76 and the fixed contact 78.
  • the contact springs 162 and 166 are helical torsion springs, mounted respectively on the moving contact 66 and on the moving contact 76, and whose first arm bears respectively on the moving contact 66 and on the contact mobile 76 and of which a second branch respectively rests on cam 160 and on cam 164.
  • cams 160 and 164 and the contact springs 162 and 166 transmit a rotational movement of the caliper 152 into a rotational movement of the moving contacts 66 and 76, and that the direction of rotation of the moving contacts 66 and 76 is opposite to the direction of rotation of the caliper 152.
  • the caliper swings from the armed position to the unhooked position, it rotates clockwise, at the angle of the figures 3 And 4 , and rotates the moving contacts 66 and 76 counterclockwise, at the angle of figures 3 And 4 .
  • the switching mechanism 150 also includes a spring 170, known as the "caliper spring”, visible on the figures 3 , 4 , 6 , 8 , 10 , 11 And 12 and shown alone with the 154 turntable Figures 11 And 12
  • the caliper spring 170 is located here in the left compartment 50 of the housing 30.
  • the caliper spring 170 applies a force to the caliper plate 154, bearing against the housing 30, which tends to move the caliper 152 from the cocked position to the uncocked position.
  • the caliper spring 170 is a helical torsion spring.
  • the electrical protection device 12 also includes a switching handle 190.
  • the switching lever 190 is pivotable, relative to the housing 30, around a lever axis X190, parallel to the axis X30, between a closed position, shown on the figures 3 to 5 And 8 to 10 , and an opening position, shown on the figures 6 And 7 .
  • the switching lever 190 includes a base 192, to which the lever is pivotally attached to the housing 30.
  • the base 192 is positioned through an opening in the front panel 32, thus covering this opening.
  • the switching lever 190 is therefore supported by the front panel 32.
  • the base 192 advantageously extends on either side of the internal partition 46.
  • the lever 190 is advantageously centered, along the X30 direction, on the front panel 32.
  • the switching lever 190 includes a crank 194, supported by the base 192, through which a user can rotate the lever 190. To be accessible to the user, the crank 194 is located outside the housing 30.
  • the switching mechanism 150 advantageously includes a spring 196, called the "lever spring", visible on the figures 3 , 4 , 6 , 8 And 10
  • the lever spring 196 applies force to the lever 190 by bearing against the housing 30, which tends to return the lever from the closed position to the open position.
  • the lever spring 196 is a helical torsion spring, housed inside the base 192 around of the X190 joystick axis, one branch of which rests on the 190 joystick and another branch rests on the internal partition 46.
  • the 150 switching mechanism advantageously includes a 200 connecting rod, visible on the figures 3 , 4 , 6 , 8 And 10
  • the connecting rod 200 for example, is located in the left compartment 50.
  • the connecting rod 200 includes a first end 202 attached to the lever 190, specifically to its base 192. Through this first end 202, the connecting rod 200 can pivot relative to the lever 190, around an axis that is parallel to, and distinct from, the axis of the lever X190. Thus, the rotation of the lever 190 is linked to a cranking motion of the first end 202 of the connecting rod 200.
  • the first end 202 of the connecting rod 200 describes an arc of a circle centered on the axis of the lever X190.
  • the connecting rod 200 includes a second end 204, opposite the first end 202, which interacts in particular with the caliper 152, as described below.
  • the second end 204 is guided in a groove 206 made in the plate 154, that is to say in a plane parallel to the directions Y30 and Z30.
  • the switching mechanism 150 advantageously includes a locking latch 210, visible on the figures 3 , 4 , 6 , 8 And 10 . At least part of the locking latch 210 is disposed in the same compartment as that of the connecting rod 200, to cooperate with the latter, here the left compartment 50.
  • At least part of the locking latch 210 extends into the compartment(s) housing the triggers 110, 112, and 114, to cooperate mechanically with them, here compartments 48 and 50.
  • the latch 210 is advantageously supported by the bracket 152.
  • the latch 210 moves between a locking configuration, shown on the figures 3 to 5 And 10 , and an unlocking configuration, shown on the figures 6 to 9 .
  • each trigger 110, 112 and 114 is configured to switch the locking latch 210 from the locking configuration to the unlocking configuration, directly or indirectly, when said trigger 110, 112 or 114 in question detects an electrical fault, of the type predetermined for that trigger.
  • the latch 210 includes a bolt 212 and a hook 214 which cooperate together.
  • hook 214 extends into both compartments 48 and 50, so as to be visible on the figures 3 to 10 In practice, it is intended that the hook 214 extends both into the compartment(s) receiving the triggers to be actuated by them.
  • the hook 214 also extends into the compartment where the lock 212 is located, to cooperate with the latter.
  • the hook 214 is carried by the bracket 152, pivoting relative to the bracket 152 around an axis X214, called the "hook axis", here parallel and not confused with the bracket axis X152. This pivoting is carried out when the latch 210 moves between the locking and unlocking configurations.
  • the hook 214 comprises a first part 216, located in the same compartment as the latch 212, and a second part 218, located in the other compartment.
  • the first part 216 and the second part 218 are fixedly connected to each other, preferably by being embedded within each other, so that any movement of the first part 216 results in an identical movement of the second part 218, and vice versa.
  • the lock 212 extends into the left compartment 50, so as to be visible on the figures 3 , 4 , 6 , 8 And 10
  • the locking pin 212 is designed to extend within the same compartment as the connecting rod 200, in order to cooperate with it.
  • the locking pin 212 is carried by the yoke 152, pivoting relative to the yoke 152 around an axis X212, called the "locking pin axis," which is parallel to, and not coincident with, the axis X152.
  • the locking pin axis X212 is carried by the connecting shaft 158, which links the plate 154 to the counter-plate 156.
  • a through hole 213 is provided in the lock 212.
  • the hook 214 In the locking configuration, the hook 214 is in a so-called "holding orientation,” where the hook 214 holds the latch 212 in a so-called “capture orientation.”
  • the first part 216 of the hook 214 includes, for example, a radial arm 220, against which the latch 212 comes to a rotational stop.
  • the hook 214 In the unlocking configuration, the hook 214 is in a so-called “release orientation,” where the hook 214 allows the latch 212 to be pivoted relative to the stirrup 152.
  • the hook 214 pivots clockwise to change from the holding orientation to the unhooking orientation. When the hook 214 is moved from the unhooking orientation to the holding orientation, it returns and holds the latch 212 in the capture orientation.
  • the hook 214 and the latch 212 are in contact, so that the latch 212 is prevented from rotating around the latch axis X212 by the hook 214, whereas in the unlocking configuration, the hook 214 and the latch 212 are not in contact, so that the latch 212 is not prevented from pivoting around the latch axis X212 by the hook 214.
  • the minimum value of the moment M when the stirrup 152 is in the armed position is advantageous, because the forces generated on the contacting surfaces of the hook 214 and the lock 212 are also minimal.
  • the force to be exerted on the hook 214 for necessary to move the hook 214 from its holding orientation to its unhooking orientation is minimal.
  • the latch 210 is particularly sensitive.
  • the switching mechanism 150 advantageously includes a spring 222, called the "latch spring", visible on the Figures 5 , 7 And 9 .
  • the latch spring 222 is provided in the right compartment 48.
  • the latch spring 222 applies a force on the locking latch 210, bearing against the counter plate 156 of the caliper 152, which tends to return the locking latch 210 from the unlocked configuration to the locked configuration.
  • the latch spring 222 is a helical torsion spring, one arm of which bears on the counter plate 156 and another arm of which bears on the second part 218 of the hook 214, so that the latch spring 222 actuates the latch 210 via the hook 214.
  • the latch spring 222 tends to return the hook 214 from the release orientation to the holding orientation.
  • the second end 204 of the connecting rod 200 is captured by the locking latch 210, specifically by the latch 212, when the latch 210 is in the locked position, here when the latch 212 is in the capture orientation. Indeed, the second end 204 of the connecting rod is positioned in the through hole 213 of the latch 212. Then, via the latch 210, the second end 204 is attached to the bracket 152 by pivoting relative to said bracket 152.
  • the second end 204 of the connecting rod 200 is clamped between the walls of the groove 206 of the plate 154 and the walls of the through hole 213 of the lock 212 and therefore cannot move relative to the plate 154 of the bracket 152 or relative to the lock 212.
  • the second end 204 of the connecting rod 200 is free to move in the groove 206 of the plate 154, and this movement causes the lock 212 to rotate around the lock axis X212.
  • the position of the switching handle 190 is subject to the position of the bracket 152, and therefore to the position of the moving contacts 66 and 76, via the connecting rod 200 and the locking latch 210.
  • the stirrup 152 is put in the armed position, by means of the connecting rod 200, the second end of which 204 is captured by the latch 210 to drive the stirrup 152.
  • the stirrup 152 being put in the armed position, it puts the moving contacts 66 and 76 in the conduction position, by means of the contact springs 162 and 166.
  • the stirrup 152 is placed in the triggered position, via the connecting rod 200, the second end of which 204 is captured by the locking latch 210 to drive the stirrup 152.
  • the stirrup With the stirrup in the triggered position, it puts the contacts 66 and 76 in the isolation position, via the cams 160 and 164 of the plate 154 and the counter plate 156.
  • the stirrup 152 When the locking latch 210 is in the locked configuration, the stirrup 152 is in the armed position and the switching handle 190 is in the closed position, the stirrup 152 and the switching handle 190 hold each other in position, against the stirrup spring 170, which tends to move the stirrup 152 towards the triggered position, and the handle spring 196, which tends to move the switching handle 190 towards the open position.
  • the connecting rod 200 is in the locking orientation when the first end 202 is positioned in a direction opposite to the Y30 direction with respect to a straight line, parallel to the Y30 and Z30 directions and passing through the joystick axis X190 and the second end 204.
  • the rotation of the switching lever 190 from the closed position to the open position causes a movement of the first end 202, in a plane parallel to the Y30 and Z30 directions, which describes an arc of a circle centered on the lever axis X190.
  • This arc-shaped movement leads to a displacement of the first end 202 in the opposite direction to the Z30 direction, i.e. towards the lower end 38 of the housing, as long as the connecting rod 200 is in the locking orientation, then to a displacement of the first end 202 in the Z30 direction when the connecting rod 200 is no longer in the locking orientation, i.e. when the first end is positioned in the Y30 direction with respect to a straight line, parallel to the Y30 and Z30 directions and passing through the lever axis X190 and the second end 204.
  • the displacement of the first end 202 in the opposite direction to the Z30 direction causes the second end 204 to move in the same direction.
  • the second end 204 exerts a force on the walls of the groove 206 of the plate 154 as well as a force on the walls of the through hole 213 of the lock 212.
  • This force on the lock 212 tends to rotate the lock 212 around the lock axis X212 in a clockwise direction, at the angle of figures 3 And 4 This tends to keep the locking latch 210 in the locked position.
  • the connecting rod 200 keeps the locking latch 210 in the locked position.
  • the lock 212 and the stirrup 152 are then prevented from rotating, which prevents the second end 204 from moving in the opposite direction to the Z30 direction and which prevents the first end 202 from moving.
  • the switching lever 190 is prevented from rotating.
  • the caliper 152 is prevented from rotating.
  • the switching handle 190 and the caliper 152 mutually hold each other in the closed and armed positions, via the connecting rod 200.
  • the connecting rod is initially moved in the opposite direction to the Z30 direction, as described above, and the actuation force applied by the user results in a force being exerted on the plate 154 which is sufficient to drive the rotation of the caliper 152 in the counterclockwise direction, at the angle of figures 3 And 4 , against the force exerted by the caliper spring 170.
  • the connecting rod 200 is moved from its locking orientation until the first end 202 is positioned in the Y30 direction relative to the right, parallel to the Y30 and Z30 directions, which crosses the joystick axis X190 and the second end 204.
  • the connecting rod 200 is no longer in the locking orientation, so the mutual positioning between the caliper 152 and the switching lever 190 is no longer ensured. Then, under the effect of the caliper spring 170, the caliper 154 is moved to the triggered position, and under the effect of the lever spring 196, the switching lever 190 is returned to the open position. When the caliper 152 is in the triggered position and the lever 190 is in the open position, they are held in these positions by the caliper spring 170 and the lever spring 196.
  • the locking latch releases the bracket 152 so that the bracket tilts towards the triggered position.
  • the handle 190 puts the switching mechanism 150 in the armed position.
  • the handle 190 puts the switching mechanism 150 in the triggered position.
  • the direction of rotation of the switching lever 190 is identical to the direction of rotation of the bracket 152.
  • the switching lever 190 is actuated towards the open position, that is, when the lever rotates around the lever axis X190 clockwise, at the angle of figures 3 And 4 , then the caliper is tilted into the triggered position by rotating around the caliper axis X152 clockwise, at the angle of figures 3 And 4 .
  • Each trip unit 110, 112, and 114 is individually configured to trigger the switching mechanism 150 into the tripped configuration, while the switching mechanism 150 was in the armed configuration, when said trip unit 110, 112, or 114 is energized by an electrical fault of the type predetermined for that trip unit 110, 112, or 114. This leads to the switching mechanism 150 isolating the moving contacts 66 and 76 when the electrical fault occurs.
  • each trip unit 110, 112, and 114 is designed to trigger a switching the 210 locking latch from the locking configuration to the unlocking configuration.
  • the groove 206 of the plate 154 forms a branch-free path along which the second end 204 of the connecting rod 200 is allowed to move.
  • the connecting rod 200 no longer provides mutual support to the position of the stirrup 152 and the switching lever 190. Then, the lever 190 is returned to the open position under the action of the lever spring 196 and the stirrup 152 is returned to the triggered position under the action of the stirrup spring 170, the stirrup 152 then driving the moving contacts 66 and 76 towards the isolation position.
  • the switching mechanism 150 in particular the lever spring 196, will return the switching lever 190 to the open position when the switching mechanism 150 is put into the triggered configuration, whether by user action on the switching lever 190 itself, or by triggering from one of the triggers 110, 112 or 114.
  • the magnetic release 110 actuates, for example, a rocker 240 belonging to the switching mechanism 150; the rocker 240 drives the hook 214 to the unlocked position.
  • the rocker 240 is visible on the Figures 5 , 7 And 9 .
  • the rocker 240 is attached to the housing 30, for example to the internal partition 46, being pivotable relative to the housing 30 around a rocker axis X240 parallel to the yoke axis X152, between an initial position shown on the Figures 5 And 7 , and a tilting position shown on the figure 9 .
  • the magnetic trigger 110 drives the rocker 240 from the initial position to the tilting position by displacement of the moving core 122, which comes to rest against a first end 242 of the rocker 240, here in a direction opposite to the Z30 direction.
  • the rocker 240 has a second end 244, which comes to rest against a leg 246 belonging to the second part 218 of the hook 214, in the direction Z30, so that the hook 214 pivots to the unhooking orientation under the action of the pivoting of the rocker 240 to the tilting position, against the effort of the latch spring 222.
  • the moving core 122 returns to its initial position, allowing the rocker 240 to be returned to its initial position. This, in turn, allows the hook 214 to be returned to its holding orientation. Under the action of the latch spring 222, the rocker 240 is then returned to its initial position via the leg 246 of the second part 218 of the hook 214, while the hook 214 itself is returned to its holding orientation by the latch spring 222.
  • the moving contact 76 is directly moved into the isolation position, without waiting for the pivoting of the bracket 152.
  • the switching of the moving contact 76 into the isolation position is faster than the switching of the locking latch 210 into the unlocked position and the switching of the bracket 152 into the triggered position, so that, when the bracket pivots into the triggered position, it only causes the moving contact 66 to switch into the isolation position and also allows the moving contact 76 to be maintained in the isolation position, due to the action of the cam 164.
  • the differential release 114 actuates, for example, a mechanical force amplifier 260, which is visible on the figures 3 , 4 , 6 And 8 , via the movable rod 130.
  • the amplifier 260 includes, for example, a drawer 262, a lock 264, a drawer spring 266, a lock spring 268 and a reset lever 270.
  • the drawer 262 is movable relative to the housing 30 between an armed position, where the drawer 262 allows the locking latch 210 to be in the locked configuration, and a triggered position, where the drawer 262 puts the latch 210 in the unlocked configuration, in order to trigger a switchover of the switching mechanism 150 towards the triggered configuration.
  • the drawer 262 rests against a leg 272 of the hook 214 when the drawer 262 is moved from the armed position to the released position, which moves the hook 214 from the holding position to the release position.
  • the drawer spring 266 applies a force to the drawer 262, which tends to move the drawer from the armed position to the released position.
  • the moving contact 66 changes from the conduction position to the isolation position, the moving contact 66 returns the drawer 262 to the armed position, against the force of the drawer spring 266, by resting against the drawer 262.
  • the lock 264 is rotationally mobile relative to the housing 30 around an axis X264 between a locking position, shown on the figures 3 , 4 , 6 And 8 , where the lock 264 is in a drawer, and an unlocking position, not visible in the figures, where the lock 264 allows the drawer 262 to be moved from the armed position to the triggered position by the drawer spring 266, and to be brought back from the triggered position to the armed position by the moving contact 66.
  • the locking spring 268 exerts a force on the locking mechanism 264, bearing against the internal partition 46 of the housing 30, which tends to return the locking mechanism 264 from the unlocked position to the locked position.
  • the cocking lever 270 is supported by the housing 30, specifically by the internal partition 46, and extends between the locking mechanism 264 and the movable rod 130 of the trigger 114. In this example, the lever 270 is rotatable relative to the housing 30 about an axis of rotation X270, which is parallel to the direction X30.
  • the movable rod 130 When a differential fault occurs, the movable rod 130 is displaced, here in the Z30 direction. Under the action of the displacement of the movable rod 130, the reset lever 270 is pivoted between the neutral position, shown in the diagrams. figures 3 , 4 And 8 and the unlocking position, not visible in the figures. In this pivoting movement, the lever 270 moves the lock 264 from its locked position to the unlocked position, against the action of the lock spring 268. With the lock 264 in the unlocked position, the drawer 262 is allowed to move from the cocked position to the triggered position, under the action of the drawer spring 266, and presses against the leg 272 of the hook 214, which pivots the hook 214 from the holding orientation to the unhooking orientation.
  • the drawer 262 switches the locking latch 210 from the locked position to the unlocked position.
  • the bracket 152 switches the moving contacts 66 and 76 from the conduction position to the isolation position, in pivoting itself from the armed position to the triggered position.
  • the contact holder 92 of contact 66 bears against the slide 262, thus returning the slide 262 to the armed position, against the action of the slide spring 266.
  • the slide 262 drives the reset lever 270 to the reset position. Consequently, the movable rod 130 is returned by the lever 270 to its reset position, so that the differential release 114 is reset.
  • the drawer 262 During the movement of the drawer 262 towards the armed position, the drawer 262 allows the lock 264 to be brought back to the locking position by the lock spring 268, so that the lock 264 is opposite the locking notch of the drawer 262.
  • thermal trigger 112 we now describe in detail the thermal trigger 112 and its operation.
  • the bimetallic strip 113 comprises two distinct ends, with a fixed end 280 and an actuating end 282.
  • the bimetallic strip 113 has an elongated shape, and the fixed end 280 and the actuating end 282 are two opposing ends.
  • the actuating end 282 moves relative to the fixed end 280.
  • the thermal trigger 112 also includes a support 284 and an adjustment element 300.
  • the thermal trigger 112 also actuates the rocker 240 from the initial position to the rocker position, here via a connecting rod 250, belonging to the switching mechanism 150.
  • the connecting rod 250 includes a first end fixed to the first end 242 of the rocker 240 and a second end forming a hook and guided in translation in a pocket 252 provided in the internal partition 46 of the housing 30.
  • the actuating end 282 causes the connecting rod 250 to move in a direction opposite to the direction Z30, so that the rocker 240 is driven from the initial position to the rocker position, as when the moving core 122 of the magnetic trigger 120 comes to rest on the first end 242 of the rocker 240.
  • the actuation end 282 of the bimetallic strip 113 is configured to switch the switching mechanism 150 into the open configuration when the temperature of the bimetallic strip 113 changes to the deformed configuration.
  • the rocker 240 when the rocker 240 is driven from the initial position to the rocker position by a trigger other than the thermal trigger 112, for example by the magnetic trigger 110 as illustrated in the figure 9 , the movement of the connecting rod 250 does not cause the actuating end 282 of the bimetallic strip 113 to move, which avoids stressing the bimetallic strip 113 at each triggering linked to the magnetic trigger 110 and reduces fatigue of the bimetallic strip material, contributing to the durability of the electrical protection device 12.
  • the support 284 further includes an adjustment portion 292, separate from the fixing portion 286, arranged so that when the adjustment portion 292 is moved relative to the fixing portion 286, the attachment portion 288 also moves, thereby moving the actuating end 282 of the bimetallic strip 113 relative to the housing 30.
  • moving the adjustment portion 292 allows the position of the actuating end 282 relative to the switching mechanism 150 to be adjusted, which is equivalent to calibrating the thermal trigger 112.
  • the attachment portion 288 is located between the adjustment portion 292 and the fixing portion 286.
  • the housing 30 advantageously includes two guide stops 294, which are configured to guide the adjustment portion 292 in translation relative to the housing 30.
  • the movements of the adjustment portion 292 thus guided are more precise, which improves the accuracy of the calibration by eliminating any uncontrolled movements of the adjustment portion 292.
  • the adjustment portion 292 has an elongated plate shape, while the guide stops 294, visible on the figure 12 These are partitions that project outwards from the internal partition 46 and are arranged on the sides and on the other side of the adjustment portion 292, which slides between the two guide stops 294.
  • the adjustment portion 292 includes a relief 296, which is provided along the adjustment portion 292 and which is configured to cooperate with the adjustment organ 300, as explained later.
  • the 300 adjustment unit is now described.
  • the adjustment element 300 includes a rod 302, which here has a shape of revolution around an adjustment axis A300.
  • the housing 30 includes bearings 304, which cooperate with the rod 302 so that the adjusting member 300 is rotatable relative to the housing 30 around the adjusting axis A300.
  • the adjusting member 300 is located near an outer wall 305 belonging to the housing 30.
  • the outer wall 305 is advantageously a portion of the back 34 of the housing 30.
  • One of the bearings 204 is provided in the outer wall 305, while another of the bearings 304 is provided in a partition 307 belonging to the housing 30, for example, integral with the inner partition 46.
  • the adjusting member 300 is supported by the housing 30.
  • the adjusting member 300 is actuated through the outer wall 305 of the housing 30.
  • the adjusting member 300 includes a recess 306, formed on one end of the rod 302 oriented towards the outer wall 305 and configured to cooperate with a tool (not shown) so as to rotate the adjusting member 300 around the adjustment axis A300.
  • the tool corresponding to the recess 306 is, for example, operated by a user or by a calibration machine.
  • the recess 306, visible on the figure 13 here presents a six-lobe shape and is chosen to drive the adjustment member 300 in rotation around the axis A300 without having to exert force parallel to the axis A300 on the adjustment member 300.
  • the adjusting member 300 includes a drive portion 308, which is provided radially to the adjusting axis A300.
  • the drive portion 308 extends outward from the rod 302.
  • the drive portion 308 is configured to cooperate with the relief 296 provided in the adjustment portion 292, so as to move the adjustment portion 292 when the adjustment member 300 is actuated in rotation around the adjustment axis A300.
  • the relief 296 is thus a complementary relief of the drive portion 308.
  • the drive portion 308 comprises a toothed wheel, while the complementary relief 296 is a rack.
  • the drive portion 308 is configured to cooperate with the complementary relief 296 by meshing of the toothed wheel with the rack, so as to move the adjustment portion 292 relative to the fixing portion 286.
  • the adjustment axis A300 is advantageously arranged orthogonally to the direction of movement of the adjustment portion 292, guided in translation by the lugs 294.
  • the adjusting member 300 also includes a locking portion 310, which here has a cylindrical shape centered on the adjusting axis A300.
  • the locking portion 310 includes locking claws 312, which are formed to project radially from the adjusting axis A300.
  • the blocking portion 310 is provided opposite the partition 307.
  • An additional portion 314 is provided in a recess in the partition 307 opposite the blocking portion 310.
  • the bearings 304 are also configured to guide the adjusting member 300 in translation relative to the housing 30 along the adjusting axis A300, between an adjusting position, in which the locking portion 310 does not cooperate with the complementary portion 314 and does not prevent the rotation of the adjusting member 300 relative to the housing 30 around the adjusting axis A300, and a blocked position, in which the locking portion 310 cooperates with the complementary portion 314 and prevents the rotation of the adjusting member 300 around the adjusting axis A300.
  • the adjusting element 300 is shown respectively in the adjusted position and in the locked position on inserts a) and b) of the figure 12 .
  • the locking claws 312 are implanted in the complementary portion 314 so as to lock the adjusting member 300 both in rotation around the adjusting axis A300 and in translation along the axis A300.
  • the blocking portion 310 and the complementary portion 314 together form a blocking device 316 of the electrical protection device 12.
  • the blocking device 316 is selectively in a so-called “engaged” configuration when the adjusting member 300 is in the blocked position, or in a so-called “released” configuration when the adjusting member 300 is in the adjusting position.
  • the transition from the released configuration to the engaged configuration is done simply by pushing the adjustment member 300 parallel to the adjustment axis A300, for example using a tool cooperating with the impression 306, so as to implant the locking claws 312 in the material of the partition 307.
  • the partition 307 is made of a polymer material, which deforms during the insertion of the locking claws 312. When the adjusting member 292 is in the engaged position, the elastic return of the partition material 307 prevents the adjusting member 300 from moving from the engaged position to the set position. In other words, once the locking device 316 is in the engaged configuration, the locking of the adjusting member 300 is considered irreversible.
  • the arc horn 105, the adjusting portion 292, and the remainder of the support 284 each form the sides of a triangle, with the adjusting portion 292 arranged near the outer wall 305 of the housing 30.
  • the adjusting portion 292 is arranged parallel to the outer wall 305, while the adjusting axis A300 is advantageously orthogonal to the outer wall 305, near which the adjusting element 300 is located, the adjusting element 300 being at least partially contained within the triangle. This arrangement is particularly compact.
  • an operator actuates the adjusting member 300 in rotation around the adjusting axis A300 to move the adjusting portion 292 relative to the fixing portion 286, so as to adjust the position of the actuating end 282 relative to the switching mechanism 150.
  • the support 284 being elastically deformed, the rotation of the adjusting member 300 around the adjusting axis A300 can be done in both directions as many times as necessary, until the calibration of the thermal trigger 112 meets the criteria determined by the user.
  • the operator moves the locking device 316 into the engaged configuration, so as to selectively lock the adjusting member 300 and prevent the movement of the adjusting portion 292 relative to the fixing portion 286.
  • the switching mechanism 150 described here and its triggering mode by triggers 110, 112 and 114 is given only as an illustrative example.
  • the magnetic release 110 and the thermal release 112 can be considered as a single release, then called a "magnetothermal release", which switches the switching mechanism 150 into the triggered configuration when an electrical fault of the short-circuit type or product overload occurs, by acting on the rocker 240.
  • a second embodiment of the electrical protection device 12 is shown in figure 12
  • elements analogous to those in the first embodiment bear the same references and function in the same way. The following primarily describes the differences between the first and second embodiments.
  • the drive portion 308 of the adjusting member 300 is a cam, which here has an ovoid shape, while the complementary relief 296, provided in the adjusting portion 292, is a notch configured to receive the cam.
  • the drive portion 308 is provided radially to the adjustment axis A300 and includes a peripheral surface, configured to bear against an internal surface 320 of the notch, so that when the adjusting member pivots relative to the housing around the adjustment axis, the adjustment portion 292 is displaced relative to the fixing portion 286.
  • the transformation of the rotational movement of the adjusting member 300 around the adjusting axis A300 into a displacement of the adjusting portion 292 relative to the fixing portion 286 can be achieved by any other means equivalent to those described in the two embodiments.
  • the adjusting member 300 comprises, for example, a pin arranged parallel to the adjusting axis, this pin being received in an oblong hole formed in the adjusting portion 292.

Landscapes

  • Breakers (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Claims (12)

  1. Elektrische Schutzvorrichtung (12), umfassend:
    - ein Gehäuse (30),
    - einen Leitungspfad (70), umfassend einen Eingangsanschluss (72), einen Ausgangsanschluss (74) und einen bewegbaren Kontakt (76) umfasst, der in Bezug auf das Gehäuse (30) bewegbar ist, zwischen:
    • einer leitenden Position, in der der bewegbare Kontakt (76) den Eingangsanschluss (72) elektrisch mit dem Ausgangsanschluss (74) verbindet, und
    • einer Isolierposition, in der der erste Eingangsanschluss (72) und der erste Ausgangsanschluss (74) elektrisch voneinander isoliert sind;
    - einen Schaltmechanismus (150), der in dem Gehäuse (30) untergebracht und konfiguriert ist, um umzuschalten zwischen:
    • einer geschlossenen Konfiguration, in der der Schaltmechanismus den bewegbaren Kontakt in Leitungsposition bringt, und
    • einer offenen Konfiguration, in der der Schaltmechanismus den bewegbaren Kontakt in Isolierposition bringt;
    - einen thermischen Auslöser (112), umfassend:
    • ein Bimetall (113), das ein Befestigungsende (280) und ein Betätigungsende (282) aufweist, die voneinander getrennt sind, wobei das Bimetall mit dem bewegbaren Kontakt (76) zwischen dem Eingangsanschluss (72) und dem Ausgangsanschluss (74) in Reihe verbunden ist, wobei das Bimetall verformbar ist, wenn das Bimetall erwärmt wird,
    • eine Halterung (284), die einen Befestigungsabschnitt (286), der fest mit dem Gehäuse (30) verbunden ist, und einen Anbringungsabschnitt (288), an dem das Befestigungsende (280) des Bimetalls (113) befestigt ist, umfasst,
    • ein Stellglied (300), das von dem Gehäuse (30) getragen wird, das durch eine Außenwand (305) des Gehäuses betätigbar ist und das konfiguriert ist, um den Anbringungsabschnitt (288) in Bezug auf den Befestigungsabschnitt (286) zu bewegen, um die Position des Betätigungsendes (282) des Bimetalls (113) in Bezug auf den Schaltmechanismus (150) einzustellen,
    wobei:
    - das Betätigungsende (282) des Bimetalls (113) konfiguriert ist, um den Schaltmechanismus (150) in die offene Konfiguration zu schwenken, wenn unter der Wirkung eines elektrischen Stroms, der innerhalb des Leitungswegs (70) fließt, die Temperatur des Bimetalls (113) einen vorbestimmten Schwellenwert überschreitet und das Bimetall (113) in eine verformte Konfiguration verformt wird,
    und
    - die Halterung (284) ferner einen Einstellabschnitt (292) umfasst, der sich von dem Befestigungsabschnitt (286) unterscheidet,
    - das Stellglied (300) konfiguriert ist, um den Einstellabschnitt (292) in Bezug auf den Befestigungsabschnitt (286) zu bewegen, um die Position des Betätigungsendes (282) in Bezug auf das Gehäuse (30) einzustellen,
    - der thermische Auslöser (112) konfiguriert ist, um, wenn das Stellglied (300) betätigt wird, die Halterung (284) elastisch zu verformen, dadurch gekennzeichnet, dass:
    - die elektrische Schutzvorrichtung (12) eine Blockiervorrichtung (316) umfasst, die selektiv eine eingerückte Konfiguration, in der die Blockiervorrichtung (316) das Stellglied (300) blockiert und eine Bewegung des Stellglieds (292) in Bezug auf den Befestigungsabschnitt (286) verhindert, und eine freigegebene Konfiguration, in der das Stellglied (300) nicht blockiert ist, aufweist.
  2. Elektrische Schutzvorrichtung (12) nach Anspruch 1, wobei:
    - das Stellglied (300) von Lagern (304) getragen wird, die zu dem Gehäuse (30) gehören, sodass das Stellglied in Bezug auf das Gehäuse (30) um eine Einstellachse (A300) drehbar ist,
    - das Stellglied (300) eine Prägung umfasst, die konfiguriert ist, um das Stellglied (300) um die Einstellachse (A300) drehbar zu betätigen,
    - das Stellglied (300) einen Antriebsabschnitt (308) umfasst, der radial zu der Einstellachse (A300) ausgebildet ist und konfiguriert ist, um mit einer komplementären Erhebung (296) zusammenzuwirken, die in dem Einstellabschnitt (292) angeordnet ist, um den Einstellabschnitt (292) translatorisch anzutreiben, wenn das Stellglied (300) um die Schaftachse gedreht wird, und den Einstellabschnitt (292) in Bezug auf den Befestigungsabschnitt (286) zu verschieben, um die Position des Betätigungsendes (282) in Bezug auf den Schaltmechanismus (150) einzustellen.
  3. Elektrische Schutzvorrichtung (12) nach Anspruch 2, wobei die Einstellachse (A300) orthogonal zu der Außenwand (305) ist.
  4. Elektrische Schutzvorrichtung (12) nach einem der Ansprüche 2 oder 3, wobei das Gehäuse (30) Führungsanschläge (294) umfasst, die konfiguriert sind, um den Einstellabschnitt (292) in Bezug auf das Gehäuse (30) in einer Richtung orthogonal zu der Einstellachse (A300) translatorisch zu führen, wenn das Stellglied (300) den Einstellabschnitt verschiebt.
  5. Elektrische Schutzvorrichtung (12) nach einem der Ansprüche 2 bis 4, wobei der Antriebsabschnitt (308) ein Zahnrad umfasst, während die komplementäre Erhebung (296) eine Zahnstange ist, wobei der Antriebsabschnitt konfiguriert ist, um mit der komplementären Erhebung durch Eingriff des Zahnrads mit der Zahnstange zusammenzuwirken, um den Einstellabschnitt (292) in Bezug auf den Befestigungsabschnitt (286) zu bewegen.
  6. Elektrische Schutzvorrichtung (12) nach einem der Ansprüche 2 bis 4, wobei der Antriebsabschnitt (308) ein Nocken ist, während die komplementäre Erhebung (296) eine Kerbe ist, wobei der Antriebsabschnitt konfiguriert ist, um mit der komplementären Erhebung (296) durch Einführen des Nockens in die Kerbe zusammenzuwirken, wobei der Nocken an einer Innenfläche (320) der Kerbe anliegt, um den Einstellabschnitt (292) in Bezug auf den Befestigungsabschnitt (286) zu verschieben.
  7. Elektrische Schutzvorrichtung (12) nach einem der Ansprüche 2 bis 6, wobei:
    - das Stellglied (300) auch translatorisch in Bezug auf das Gehäuse (30) entlang der Einstellachse (A300) zwischen einer Einstellposition, in der die Blockiervorrichtung (316) in einer gelösten Konfiguration ist und die Drehung des Stellglieds (300) um die Einstellachse (A300) nicht verhindert, und einer blockierten Position, in der die Blockiervorrichtung (316) des Gehäuses (30) in einer eingerückten Konfiguration ist und die Drehung des Stellglieds (300) verhindert, bewegbar ist.
  8. Elektrische Schutzvorrichtung (12) nach Anspruch 7, wobei:
    - das Stellglied (300), um die Drehung des Stellglieds (300) in der blockierten Position zu verhindern, einen Blockierabschnitt (310) umfasst, während die Blockiervorrichtung (316) einen komplementären Abschnitt (314) umfasst, der sich gegenüber dem Blockierabschnitt (310) befindet,
    - wenn das Stellglied (300) von der Einstellposition in die verriegelte Position übergeht, der Blockierabschnitt (310) mit dem komplementären Abschnitt (314) zusammenwirkt und in die Eingriffskonfiguration übergeht, um eine Drehung des Stellglieds (300) um die Einstellachse (A300) zu verhindern und das Stellglied (300) in der blockierten Position zu halten.
  9. Elektrische Schutzvorrichtung (12) nach Anspruch 8, wobei der Blockierabschnitt (310) Blockierklauen (312) umfasst, die radial zu der Einstellachse (A300) ausgebildet sind, die in dem komplementären Abschnitt (314) implantiert sind, wenn das Stellglied (300) in der blockierten Position ist, und die eine Drehung des Stellglieds (300) um die Einstellachse (A300) verhindern, während die Blockierklauen nicht in dem komplementären Abschnitt (314) implantiert sind, wenn das Stellglied (300) in der Einstellkonfiguration ist.
  10. Elektrische Schutzvorrichtung (12) nach einem der Ansprüche 1 bis 9, wobei die Außenwand (305) eine Rückseite (34) des Gehäuses (30) ist, wobei die Rückseite eine Befestigungseinrichtung (36) umfasst, die konfiguriert ist, um die elektrische Schutzvorrichtung (12) fest an einer Befestigungsschiene (16) einer elektrischen Schalttafel (10) zu befestigen.
  11. Elektrische Schalttafel (10), umfassend eine Befestigungsschiene (16) und eine elektrische Schutzvorrichtung (12), wobei die elektrische Schutzvorrichtung (12) nach einem der Ansprüche 1 bis 10 ist und über das Gehäuse (30) an der Schiene befestigt ist.
  12. Einstellverfahren einer elektrischen Schutzvorrichtung (12) nach einem der Ansprüche 1 bis 10, umfassend:
    - einen Einstellschritt, bei dem, während die Blockiervorrichtung (316) in der gelösten Konfiguration ist, das Stellglied (300) betätigt wird, um den Einstellabschnitt (292) in Bezug auf den Befestigungsabschnitt (286) zu bewegen,
    - einen Blockierschritt, der auf den Einstellschritt folgt, bei dem die Blockiervorrichtung (316) in eine Eingriffskonfiguration gebracht wird, um das Stellglied (300) zu blockieren.
EP22188956.1A 2021-08-06 2022-08-05 Elektrische schutzvorrichtung mit thermoauslöser, elektrische schalttafel mit einer solchen vorrichtung und verfahren zur regulierung einer solchen vorrichtung Active EP4138111B1 (de)

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FR2108554A FR3126059A1 (fr) 2021-08-06 2021-08-06 Dispositif de protection électrique à déclencheur thermique, tableau électrique comprenant un tel dispositif et procédé de réglage d’un tel dispositif

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DE602004007522T2 (de) 2004-10-01 2008-03-13 Hager Electro S.A. Regulierbarer Antrieb für eine Stromleitung-Schutz-Vorrichtung
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ITMI20080335U1 (it) * 2008-10-15 2010-04-16 Abb Spa Interruttore di bassa tensione.
DE102017101728B4 (de) * 2017-01-30 2023-08-10 Abb Schweiz Ag Installationsschaltgerät mit einem Abluftkanal und einer Justierschraube
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