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EP-4318529-B1 - SWITCHING DEVICE USING ASSEMBLY OF TWO-PART MOVEABLE HEAD WITH BUILT-IN MAIN AND AUXILIARY ELECTRICAL CONDUCTORS

EP4318529B1EP 4318529 B1EP4318529 B1EP 4318529B1EP-4318529-B1

Inventors

  • ALBUQUERQUE, Andre
  • TOMASELLI, Deivt
  • ROSSO, Juliano

Dates

Publication Date
20260506
Application Date
20210326

Claims (14)

  1. Electromagnetic switching device (A), comprising: a lower set (3) which houses at least one pair of main fixed elongated conductor members (3a, 3a'), each said main fixed elongated conductor member (3a, 3a') comprising a conductor end (3b, 3b'), wherein said conductor ends (3b, 3b') of said pair of main fixed elongated conductor members (3a, 3a') are separated from each other by a gap (3h); a stationary intermediate set (2) which comprises a fixed core (2a) and a coil (2d), arranged above said lower set (3); an upper cover (1) arranged above said stationary intermediate set (2); a split movable carrier (2.1) comprising an upper part (2.1a) arranged above said fixed core (2a), and a lower part (2.1b), arranged below said fixed core (2a), which houses at least one main movable conductor bridge (2.1d) comprising first conductor ends (2.1s, 2.1s'); said upper part (2.1a) of said split movable carrier (2.1) houses a movable core (2.1c) and characterized in that said upper part (2.1a) of said split movable carrier (2.1) houses at least one auxiliary movable conductor bridge (2.1g) comprising second conductor ends (2.1q, 2.1q').
  2. Electromagnetic switching device (A) according to claim 1, characterized in that said split movable carrier (2.1) operates between a first and a second operating position, wherein in said first operating position, the conductor ends (3b, 3b'; 2.1s, 2.1s') of a main conductor set (3a, 3a'; 2.1d) are separated from each other by a gap (3h) between them, and wherein in said second operating position, said main fixed elongated conductor members (3a, 3a') are electrically connected by means of said conductor ends (3b, 3b') in contact with said conductor ends (2.1s, 2.1s') of said main movable conductor bridge (2.1d).
  3. Electromagnetic switching device (A) according to claim 1, characterized in that said fixed core (2a) of said stationary intermediate set (2) is fastened by means of fastening latches (2b).
  4. Electromagnetic switching device (A) according to claim 1, characterized in that stoppers (2.2a) are positioned in holes (2.2b) of the contact faces (2.2g) between a support for auxiliary fixed elongated conductor members (2.2) and said upper cover (1).
  5. Electromagnetic switching device (A) according to claim 4, characterized in that said support for auxiliary fixed elongated conductor members (2.2) houses at least one pair of auxiliary fixed elongated conductor members (2.2d, 2.2d').
  6. Electromagnetic switching device (A) according to claim 5, characterized in that said support for auxiliary fixed elongated conductor members (2.2) comprises at least one route limiting cavity (2.1j) for a sliding protective latch (2.1p) of said upper portion (2.1a) of said split movable carrier (2.1), which allows a sliding guided movement between a first and a second operating position of said electromagnetic switching device (A).
  7. Electromagnetic switching device (A) according to claim 4, characterized in that the manner of fastening said support for auxiliary fixed elongated conductor members (2.2) on said switching device (A) occurs between said upper cover (1) and said intermediate enclosure (2j) of said stationary intermediate set (2) positioned by means of a rib (2.2e) in a slot (2h).
  8. Electromagnetic switching device (A) according to claim 1, characterized in that the fastening between said upper portion (2.1a) and said lower portion (2.1b) of said split movable carrier (2.1) is made by interlocking between a tab (2.1e) and a latch (2.1f).
  9. Electromagnetic switching device (A) according to claim 8, characterized in that the removal of the fastening of said latch (2.1f) between said upper portion (2.1a) and said lower portion (2.1b) is made by bending said tab (2.1e) of said upper part (2.1a) of said split movable carrier (2.1).
  10. Electromagnetic switching device (A) according to claim 1, characterized in that a connection set (4) provides an electric power connection access for said main fixed elongated conductor members (3a, 3a') by means of the fastening elements (4a).
  11. Electromagnetic switching device (A) according to claim 4, characterized in that the coil connection terminals (2.1h) are connected directly to the winding of the said coil (2d) and pass through said support for auxiliary fixed elongated conductor members (2.2), positioned above the stationary intermediate set (2) through holes (2.2f).
  12. Electromagnetic switching device (A) according to claim 1, characterized in that said auxiliary conductor movable bridge (2.1g) of said movable split carrier (2.1) operates alternatively between a first and a second operating position, wherein in said first operating position the conductor ends (2.2h, 2.2h') of a pair of auxiliary fixed elongated conductor members (2.2d, 2.2d'), allocated on the support for auxiliary fixed elongated conductor members (2.2) comprise a spacing in the gap (2.1u), and wherein in said second operating position said conductor ends (2.2h, 2.2h') are connected to said auxiliary movable bridge (2.1g) by means of the conductor ends (2.1q, 2.1q').
  13. Electromagnetic switching device (A) according to claim 1, characterized in that said split movable carrier (2.1) slides on sliding guides (2f) of said stationary intermediate set (2), wherein said lower part (2.1b) comprises at least one lower laying chamber (2.1n) for said main movable conductor bridge (2.1d) and for main springs (2.1r).
  14. Electromagnetic switching device (A) according to claim 1, characterized in that said upper cover (1) comprises an electrical conductor passage groove (1a) and can house a block (1b) in a cavity (1c).

Description

TECHNICAL FIELD The present invention is part of the electrical technical field, relating specifically to an electromagnetic switching device, known as contactor. This switching device has an electromagnetic actuation system comprising a coil, one movable core and fixed cores, wherein the main power conductors are positioned at the base of the device, below the electromagnetic actuation system and one or more auxiliary and command conductors, which are incorporated to the enclosure, positioned on the upper part of the switching device. BACKGROUND OF THE INVENTION There are currently at least two main assembly concepts known for facilitating replacing the command coil in switching devices. In a first known concept, the coil is located below and in a second concept, said coil is located above the main power conductors of said switching devices. In the first concept cited above, the main, auxiliary and command conductors are positioned on the upper part, prioritizing the assembly access and replacement of the coil through the lower part of the device, and wherein the access for assembly and disassembly of said main and auxiliary conductors is performed through a set of intermediate, generally split enclosures. This occurs for switching devices with auxiliary conductors incorporated into the enclosure. This model of the state of the art shows difficulties in the assembly of the final set, due to alignment mounting details of the main and auxiliary conductors, which do not have a facilitated access for inspection or subsequent maintenance. This arrangement, wherein the main conductors are positioned in an intermediate split set of said devices, nowadays is commonly covered with an additional layer for closing of said split intermediate enclosure sets. Added to these characteristics, the use of split enclosures can impair the robustness of the set when these devices are submitted to great mechanical operating efforts, such as a short-circuit, for example. In these configurations containing split intermediate enclosures, wherein the positioning of the coil is provided in the lower set of said switching device and the positioning of the main conductors is made in the intermediate position above said coil, there is the need for a connection between said coil power conductors, arranged on the upper part of the device and the coil arranged on the lower part, since said lower set must enable the connection thereof in the assembly and disassembly when it is disconnected for maintenance. This electric connection between the upper part, the intermediate and the lower part (wherein the coil is located) is usually made by a spring or by a similar pressure terminal system, allowing the occurrence of reliability problems in this connection. There are known failures in said spring or pressure connections, commonly used in industrial assembly processes, which can be due to dimensional variation, constructive connection techniques, which can increase the temperature at specific points in the conductor terminals, or due to wear or oxidation, reducing the life of the components of the switching device. The use of said split enclosures demand a reasonable time and many operations, both in manufacturing assembly as in maintenance. In the field of application, it is desired that the final user has access to the change of coils or electrical conductor sets, so as to minimize assembly errors and avoid less specialized work force. For the user or technical assistant to replace the main electrical conductors in the said first concept, it is necessary to dismount said split enclosures, which makes this operation difficult outside of an industrial or specialized location. The main and auxiliary movable bridges, housed in a movable carrier, must be positioned laterally parallel to the respective fixed conductors, which are inserted on each side of the intermediate split internal enclosures, whereby it is necessary that the 3 parts (left side, right side and movable carrier between them) are arranged in the correct manner for a successful assembly. This must be done without the occurrence of a collision between said fixed and movable conductors, which makes the process complex and subject to errors in the operation if some component is not correctly aligned and positioned. In an assembly variation, similar to the first concept presented above, the switching device comprises a coil, movable armature and fixed armature on the lower part, an intermediate internal one-piece enclosure as an alternative, which contemplates integrated chambers for accommodating the auxiliary fixed and coil command conductors comprising main, auxiliary conductors, coil command power conductors above said coil and a closing cover, in the search for solving the problems caused and already reported by the use of said internal split enclosures. In this concept, many additional assembly components, such as additional conductor insulating elements, are necessary to comple