EP3232459A1 - Elektrisches gerät zum leitungsschutz - Google Patents

Elektrisches gerät zum leitungsschutz Download PDF

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Publication number
EP3232459A1
EP3232459A1 EP17305409.9A EP17305409A EP3232459A1 EP 3232459 A1 EP3232459 A1 EP 3232459A1 EP 17305409 A EP17305409 A EP 17305409A EP 3232459 A1 EP3232459 A1 EP 3232459A1
Authority
EP
European Patent Office
Prior art keywords
differential
trigger
line protection
contacts
electrical line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17305409.9A
Other languages
English (en)
French (fr)
Other versions
EP3232459B1 (de
Inventor
Vincent BOITEUX
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.)
Hager Electro SAS
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Hager Electro SAS
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Filing date
Publication date
Application filed by Hager Electro SAS filed Critical Hager Electro SAS
Publication of EP3232459A1 publication Critical patent/EP3232459A1/de
Application granted granted Critical
Publication of EP3232459B1 publication Critical patent/EP3232459B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • 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
    • H01H71/1072—Release mechanisms which are reset by opening movement of contacts

Definitions

  • the invention relates to an electrical line protection device of the differential switch type (RCCB).
  • RRCB differential switch type
  • This type of device is designed in particular to cut low levels of short-circuit current, and to trigger in case of differential fault.
  • the differential relay There is a precise and sensitive mechanism housed inside the differential relay. It is generally a magnetic circuit composed of a movable pallet driven at a distance or against polar surfaces of a fixed armature. These polar surfaces are rectified to obtain a high accuracy in the operation of the relay. In the case of a differential relay, when the pallet is positioned on the armature, it is said closed or armed, and when the pallet is remote from the armature, it is said open or triggered.
  • Polar surfaces are highly stressed in the electrical apparatus. They are particularly requested at each relay reset, which occurs after a differential trip, and which also occurs during each manipulation of the joystick to open the contacts. In the latter case, since it is a manual manipulation without differential tripping has occurred previously, the relay is already armed, and the lock comes to "force" the resetting of the relay causing vibrations and friction of the movable pallet on the polar surfaces, and causing premature wear of the polar surfaces.
  • This wear modifies the air gap between the movable pallet and a first of the polar surfaces on one side, and between the movable pallet and a second one of the polar surfaces on the other side.
  • the solution currently implemented is to declare a limited cycle number for the device. The user will know that beyond this number of cycles, the device may be faulty. This solution does not solve the technical problem mentioned above, and is not satisfactory.
  • the present invention aims to overcome the aforementioned drawbacks, by providing an electrical line protection apparatus comprising a differential tripping device that provides effective protection against differential faults, and which is not a point of weakness for the duration general life of the device.
  • This apparatus is mainly characterized in that it comprises a first kinematic for the opening of the contacts following a manual action on the handle and a second kinematic for the opening of the contacts following a differential trigger, said two kinematics being decorrelated from each other so as to reset the differential tripping device only during the implementation of the second kinematics.
  • the kinematic term must be understood or must be understood as being a mechanical system producing a kinematic or motion chain or as being a kinematic system or a kinematic mechanism.
  • the idea underlying the invention is to reduce the solicitations of the differential tripping device by the lock, rather than asking users to count down the number of cycles.
  • a reset is performed after and only after a differential trip. In no other case is the differential tripping device biased.
  • this new operation of the device uses conventional parts of a lock, but with some adaptations and modifications of parts to obtain two different kinematics of the lock depending on the type of trigger.
  • the first kinematic is implemented for a manual triggering of the device following a manual action performed directly on the joystick, while the second kinematic is implemented for an automatic differential trigger following the appearance of a differential defect on a line.
  • the same parts are used in both kinematics, but have different movements depending on the type of trigger. And in particular, only the second kinematic resets the differential tripping device.
  • the first kinematic does not act on the differential tripping device.
  • the second kinematics comprises a mechanism for resetting the differential tripping device.
  • This reset mechanism is adapted to be activated by a transfer of energy from the contact carrier, said energy being created when the contacts are closed and restored when the contacts are opened. Indeed, when closing the contacts, the springs associated with the contact carrier compress and store energy. During a differential trip, the second kinematics starts, and causes the movement of the contact carrier so as to move the movable contact of the fixed contact. During this movement, the springs of the contact carrier relax and return this energy to the reset mechanism to implement the resetting of the differential tripping device.
  • said differential tripping device comprises a movable tripping pusher between a retracted position when the differential tripping device is armed, and an output position when the differential tripping device has just tripped, said resetting mechanism being solicited. when the pusher takes the extended position and allowing the pusher to move from the extended position to the retracted position.
  • the reset mechanism engages by the exit of the pusher, and generates a succession of training movements which ultimately cause the retraction of the pusher.
  • the contact carrier 8 which consists of an assembly carrying movable contacts 8a.
  • the electrical apparatus being four-pole.
  • These movable contacts 8a are moved remotely or against fixed contacts 8b, also four in number, against contact springs 8c tending to move the movable contacts 8a away from the fixed contacts 8b.
  • the contact carrier 8 moves against at least one contact carrier spring 8d which then compresses.
  • this contact carrier spring 8d and the contact springs relax.
  • the contact carrier 8 is connected to a joystick 9 for controlling the contacts via a first connecting rod 7 and a second connecting rod 6.
  • the lever 9 is movable in rotation between an ON position where the contacts are closed, and an OFF position where the contacts are open.
  • These connecting rods 6,7 make it possible to transmit the rotational movement of the lever 9 towards the contact carrier 8 so that it opens or closes the contacts.
  • the first rod 7 is pivotally connected at its first end 7a with the contact carrier 8, and in pivot connection at its second end 7b with a first end 6a of the second connecting rod 6, the latter being in pivot connection at its second end 6b with the lever 9.
  • the lever 9 has a protrusion 9b inside which is a housing accommodating the second end 6b swivel of the second connecting rod 6. This housing is offset with respect to the axis 9a of rotation (better visible in figure 2 ) of the controller 9.
  • a differential tripping device 1 corresponding to a relay 1 differential.
  • This relay 1 conventionally consists of a magnetic circuit, with a fixed frame generally U-shaped, and a movable paddle attracted magnetically by the armature and adapted to come into contact with the ends of the two branches of the U. These ends are commonly called polar surfaces.
  • the pallet may be mobile in rotation or mobile in translation. It is associated with a pusher that translates between a retracted position, in this case the pallet is in contact with the polar surfaces and the relay 1 is armed, and an output position, in this case the pallet is at a distance from the polar surfaces and the relay 1 is triggered.
  • This spring element 11 consists in this example of a helical spring 11, but could quite correspond to a flexible blade or to any other form of spring 11. It comprises a first free end 11a adapted to be driven by the second arm 4c of the trigger 4, and a second free end 11b adapted to bear on the second face 2b of the rocker 2 to rotate it to enter the pusher. It is the action of the trigger 4 on the first free end 11a of the spring 11 which allows to pivot the spring 11 and in particular to rotate the second free end 11b of the spring 11 to reset the relay 1 by returning the pusher.
  • the latch 2, the pawl 3, the trigger 4, and the spring 11 form the reset mechanism of the relay 1.
  • the handle 9 of the device is in the ON position, that is to say directed to the left in the figure, and the contacts are closed.
  • Relay 1 is armed, and the pusher is in the retracted position.
  • the rocker 2 is pressed against the pusher of the relay 1 and held in place with a certain clearance by the tab 3b of the pawl 3.
  • the projection 3c of the pawl 3 blocks the first arm 4b of the trigger 4 in the raised position.
  • the second arm 4c of the trigger 4 is at a distance from the first free end 11a of the spring 11 and therefore does not exert any action on the spring 11.
  • the pushbutton of the relay 1, the rocker 2, the pawl 3, the trigger 4, and the spring 11 do not move during the opening and closing of the contacts manually.
  • the trigger 4 is never in contact with the spring 11.
  • the protuberance 9b accommodating the second end 6b of the second connecting rod 6 pivots clockwise about the axis of rotation 9a of the lever 9, driving the second connecting rod 6 upwards, as illustrated in FIG. figure 3 .
  • the second connecting rod 6 in turn drives up the second end 7b of the first connecting rod 7 and the first end 5a of the third connecting rod 5.
  • the angle between the first rod 7 and the third rod 5 becomes more and more acute, until the joystick 9 reaches the end of its travel on its right, as illustrated in FIG. figure 4 , which corresponds to the OFF position.
  • the first link 7 drives the contact carrier 8 in rotation in the clockwise direction, causing the movable contacts 8a to move away from the fixed contacts 8b: the contacts are then open.
  • the operator actuates the lever 9 to rearm the apparatus by moving it to the left, the protuberance 9b accommodating the second end 6b of the second connecting rod 6 pivots counterclockwise about the axis of rotation 9a of the handle 9, driving the second connecting rod 6 downwards, as illustrated in FIG. figure 5 .
  • the second connecting rod 6 in turn drives down the second end 7b of the first connecting rod 7 and the first end 5a of the third connecting rod 5.
  • the angle between the first 7 and the third rod 5 becomes more and more obtuse, until the lever 9 reaches the end of its race on its left, as illustrated in FIG. figure 6 , which corresponds to the ON position.
  • the figure 6 and the figure 2 are the same.
  • the first link 7 drives the contact carrier 8 in rotation in the counterclockwise direction, causing the movable contacts 8a to approach the fixed contacts 8b until they close.
  • the device is in the same configuration as Figures 2 and 6 , that is to say with the lever 9 in the ON position, and the contacts closed.
  • the pusher pushes on the first face 2a of the rocker 2 so as to rotate it clockwise, as illustrated in FIG. figure 8 .
  • the free end of the tab 3b of the pawl 3 slides on a second face 2b of the rocker 2, opposite the first face 2a.
  • the second face 2b of the rocker 2 and the free end of the pawl 3 have corresponding shapes, allowing them to slide on one another, the pivoting clockwise of the rocker 2 causing the pivoting counterclockwise ratchet 3, in the manner of two toothed wheels.
  • the protrusion 3c of the pawl 3 also has a rotation movement counterclockwise, and thus releases the first arm 4b of the trigger 4 which is then dropped downward by turning counterclockwise on a first angular sector up to the opening of contacts. Indeed, the rotation of the trigger 4 allows its protrusion 4f to rotate and thus move the third link 5 which comes to pull the contact carrier 8 to open the contacts.
  • the second arm 4c of the trigger 4 bears on the first free end 11a of the resetting spring 11, and comes to exert sufficient force to rotate the spring 11 in sense counterclockwise, as illustrated in figure 9 .
  • the second free end 11b of the spring 11 bears on the second face 2b of the rocker 2, and exerts a sufficient force to turn the rocker 2 counterclockwise against the pusher and the spring 11 of the moving pallet, until the latter is again in contact with the polar surfaces.
  • the pusher is found again in the retracted position, and the relay 1 is reset.
  • the force exerted by the trigger 4 on the resetting spring 11 comes from the energy stored by the contact carrier during the closure of the contacts, by the compression of the contact springs 8c and the contact carrier spring 8d. Before the opening of the contacts, this energy is contained thanks to the lever 9 which is in abutment in its ON position, and thanks to the trigger 4 which is in abutment against the pawl 3. At the time of opening of the contacts, the contact springs 8c and the contact carrier spring 8d relax and return this energy to the trigger via the first connecting rod 7 and the third connecting rod 5.
  • the third link 5 first pulls the contact carrier to open the contacts and then transfers the energy to the trigger 4 so that it continues its rotation. anticlockwise. This energy is sufficient to reset relay 1 as previously explained.
  • the resetting spring 11 is calibrated to be able to perform a suitable reset of the relay 1.
  • the first rod 7 then starts to rotate counterclockwise under the effect of a handle spring (not shown) so as to tow the first end 5a of the third rod 5 towards the high.
  • the angle between the first rod 7 and the third rod 5 decreases, to become an acute angle.
  • the first end 6a of the second link 6 is necessarily pulled upward, causing the pivoting of the lever 9 via the second end 6b of the second connecting rod 6 to compensate for this variation in height.
  • the lever 9 is thus progressively directed to the right until it reaches the stop (position OFF) as shown in FIG. figure 11 .
  • the trigger 4 rotates clockwise under the effect of the return of the lever 9 to the OFF position via its handle spring, until it returns to the initial position, that is to say to the position in which it was before the triggering of the relay 1.
  • the pawl 3 also returns to the initial position, and its projection 3c resets abutting on the first arm 4b of the trigger 4 to hold it until the next differential tripping.
  • the tab 3b of the pawl 3 is repositioned in front of the second face 2b of the rocker 2.
  • the reset mechanism of relay 1 is back in place and operational for the next differential trip.
  • the control lever 9 is in turn in the OFF position and the contacts are open, until a manual reset of the device (see Figures 4 to 6 ).

Landscapes

  • Push-Button Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP17305409.9A 2016-04-14 2017-04-06 Elektrisches gerät zum leitungsschutz Active EP3232459B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1653302A FR3050313B1 (fr) 2016-04-14 2016-04-14 Appareil electrique de protection de ligne

Publications (2)

Publication Number Publication Date
EP3232459A1 true EP3232459A1 (de) 2017-10-18
EP3232459B1 EP3232459B1 (de) 2020-08-19

Family

ID=56322112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17305409.9A Active EP3232459B1 (de) 2016-04-14 2017-04-06 Elektrisches gerät zum leitungsschutz

Country Status (2)

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EP (1) EP3232459B1 (de)
FR (1) FR3050313B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350525A (en) * 1965-01-25 1967-10-31 Gen Electric Circuit breaker resetting mechanism
EP0125391A2 (de) * 1983-04-13 1984-11-21 Hitachi, Ltd. Überstromschalter
EP0271669A2 (de) * 1986-12-19 1988-06-22 Felten & Guilleaume Energietechnik AG Mechanismus für einen mit einem Leitungsschutzschalter kombinierten Fehlerstromschutzschalter
EP0331586A1 (de) * 1988-03-04 1989-09-06 Merlin Gerin Betätigungsmechanismus eines Hilfsauslöseblocks für Modulschutzschalter
EP0461027A1 (de) * 1990-06-07 1991-12-11 Legrand Differential Auslösevorrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350525A (en) * 1965-01-25 1967-10-31 Gen Electric Circuit breaker resetting mechanism
EP0125391A2 (de) * 1983-04-13 1984-11-21 Hitachi, Ltd. Überstromschalter
EP0271669A2 (de) * 1986-12-19 1988-06-22 Felten & Guilleaume Energietechnik AG Mechanismus für einen mit einem Leitungsschutzschalter kombinierten Fehlerstromschutzschalter
EP0331586A1 (de) * 1988-03-04 1989-09-06 Merlin Gerin Betätigungsmechanismus eines Hilfsauslöseblocks für Modulschutzschalter
EP0461027A1 (de) * 1990-06-07 1991-12-11 Legrand Differential Auslösevorrichtung

Also Published As

Publication number Publication date
FR3050313A1 (fr) 2017-10-20
EP3232459B1 (de) 2020-08-19
FR3050313B1 (fr) 2021-02-19

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