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EP-4742296-A1 - FUSE LOAD BREAK SWITCH FOR BUSBARS OF DIFFERENT THICKNESSES

EP4742296A1EP 4742296 A1EP4742296 A1EP 4742296A1EP-4742296-A1

Abstract

A fuse-switch disconnector comprises: a housing; a sliding element that is movably arranged relative to the housing between a first position and a second position and that can be latched in both positions; a contact element that is movably arranged relative to the housing; and a spring element. The sliding element and the contact element are configured to define a first receiving area for a first busbar of a first thickness when the sliding element is in the first position, and a second receiving area for a second busbar of a second thickness, which is less than the first thickness, when the sliding element is in the second position. The spring element is configured to bias the contact element in the direction of the sliding element to contact a first busbar inserted into the first receiving area and to contact a second busbar inserted into the second receiving area.

Inventors

  • BRUCHMANN, KLAUS
  • NESS, FRANZ

Assignees

  • Klaus Bruchmann GmbH

Dates

Publication Date
20260513
Application Date
20250716

Claims (15)

  1. Fuse-switch disconnector (1) for busbars (3) of different thicknesses, wherein the fuse-switch disconnector (1) comprises: a case (10); a sliding element (20) which is arranged to be movable back and forth relative to the housing (10) between a first position and a second position and which can be locked in the first position and in the second position respectively; a contact element (40) which is arranged to be movable relative to the housing (10); and a spring element (50); wherein the sliding element (20) and the contact element (40) are configured to define a first receiving area for a first busbar (3a) of a first thickness when the sliding element (20) is arranged in the first position, and a second receiving area for a second busbar (3b) of a second thickness, which is less than the first thickness, when the sliding element (20) is arranged in the second position; and wherein the spring element (50) is designed to pre-tension the contact element (40) in the direction of the sliding element (20) in order to contact a first busbar (3a) inserted into the first receiving area and to contact a second busbar (3b) inserted into the second receiving area.
  2. Fuse load break switch (1) according to claim 1, wherein the housing (10) comprises a guide element (30) for guiding the sliding element (20) along a guide direction between the first and the second position.
  3. Fuse-switch disconnector (1) according to claim 2, wherein the guide element (30) has a first detent edge (31) and a second detent edge (32); and wherein the sliding element (20) includes a locking lug (21) configured to engage on the first locking edge (31) to lock the sliding element (20) in the first position, and configured to engage on the second locking edge (32) to lock the sliding element (20) in the second position.
  4. Fuse load disconnect switch (1) according to claim 2 or 3, wherein the guide element (30) has a first recess (33) which is limited by the first detent edge (31) so that when the detent lug (21) engages on the first detent edge (31), the detent lug (21) engages in the first recess (33).
  5. Fuse load disconnect switch (1) according to claim 4, wherein the locking lug (21) and the first recess (33) are designed such that, when the sliding element (20) is locked in the first position, the locking lug (21) can be pushed out of the first recess (33) by an external force acting on the sliding element (20) in the direction from the first position to the second position in order to release the locking of the sliding element (20) in the first position.
  6. A fuse-switch disconnector (1) according to claim 5, which is further configured such that, when the sliding element (20) is locked in the second position, the locking lug (21) can be pushed beyond the second locking edge (32) in the direction of the first external force by a first external force acting perpendicular to the guide direction and perpendicular to the second locking edge (32) on a section of the sliding element (20) which projects in the guide direction relative to the guide element (30), and subsequently the sliding element (20) can be released from the locking in the second position and moved in the direction of the first position by a second external force acting on the sliding element (20) in the direction from the second position to the first position.
  7. Fuse load break switch (1) according to one of the preceding claims, wherein the sliding element (20) is designed in a plate-like form.
  8. Fuse load break switch (1) according to one of the preceding claims, wherein, when the sliding element (20) is arranged in the first position, the sliding element (20) and the guide element are arranged one above the other; and when the sliding element (20) is arranged in the second position, the sliding element (20) and the guide element (30) are arranged offset from each other in the guide direction.
  9. Fuse load break switch (1) according to one of the preceding claims, wherein the sliding element (20) has a surface with one or more grooves (201) and/or slots that extend perpendicular to the guide direction.
  10. Fuse load break switch (1) according to one of the preceding claims, wherein a distance between the first and the second position of the sliding element (20) is greater than a stroke of the spring element (50), wherein preferably the distance between the first and the second position is at least twice, at least three times or at least five times the stroke.
  11. Fuse-switch disconnector (1) according to one of the preceding claims, wherein the fuse-switch disconnector (1) comprises a further sliding element (20) which is parallel to the The sliding element (20) is arranged and is spaced apart from the sliding element (20) in an extension direction of the busbars (3).
  12. Fuse load break switch (1) according to claim 11, wherein the housing (10) comprises a further guide element (30) for guiding the further sliding element (20) along the guide direction, wherein the further guide element (30) is arranged parallel to the guide element (30) and is spaced apart from the guide element (30) in the extension direction of the busbars (3).
  13. Fuse load break switch (1) according to claim 11 or 12, wherein the sliding element (20) and the further sliding element (20) are arranged on opposite side sections (101a, 101b) of the housing (10).
  14. Fuse load disconnect switch (1) according to one of the preceding claims, wherein the contact element (40) is plate-shaped.
  15. Fuse load break switch (1) according to claim 14, wherein the contact element (40) comprises a first contact section (41) and a second contact section (42) which are arranged parallel to each other and spaced apart from each other in the extension direction of the busbars (3), and a connecting section (43) for connecting the first contact section (41) to the second contact section (42).

Description

The present invention relates to a fuse-switch disconnector for busbars of different thicknesses. Fuse-switch disconnectors are commonly mounted on busbar systems and can be adapted to different busbar thicknesses. Busbars with thicknesses of 5 and 10 mm are typically used. These fuse-switch disconnectors can be modified or adjusted using additional (removable) components or components integrated into the fuse-switch disconnector (non-removable). However, covers are increasingly being installed in front of the busbars, providing touch protection even during fuse-switch disconnector installation. Therefore, more compact designs are needed to allow fuse-switch disconnectors to be installed despite this touch protection. DE 297 21 445 U1 describes a device adapter, in particular for load break switches, with contact feet and/or locking feet projecting from an adapter plate or the like for sliding onto busbars, wherein the contact or locking feet are essentially L-shaped and define a foot section that runs approximately parallel to and at a distance from the adapter plate, with compensating elements that can be placed on or into the contact or locking feet. DE 198 36 383 C1 describes a contacting device with clamping brackets for clamping sections of busbars, with electrical contact elements that can be electrically contacted at least partially via openings formed on the underside of the adapter through the busbar sections, in which each clamping bracket has a substantially L-shaped clamping part and a pivoting bracket adjustable to it, wherein the leg length of the adjustable pivoting bracket is dimensioned differently from the leg length of the clamping part. It is an object of the present invention to provide a fuse-switch disconnector in order to improve user-friendliness with regard to the desired applications. This problem is solved by a fuse-switch disconnector according to claim 1. Claims 2 to 15 relate to particularly advantageous implementations of the fuse-switch disconnector according to claim 1. One aspect of the present invention relates to a fuse-switch disconnector for busbars of different thicknesses, in particular for mounting on busbars of different thicknesses and/or contacting busbars of different thicknesses. The fuse-switch disconnector comprises a housing and further a (possibly first) sliding element (and optionally a further or second sliding element as described below), a contact element, and a spring element. The fuse-switch disconnector can also comprise several sliding elements (and optionally several further or second and/or possibly third sliding elements), several contact elements, and several spring elements; in particular, one sliding element (and optionally a further or second sliding element), one contact element, and one spring element for each busbar of a busbar system. The fuse-switch disconnector can, in particular, be three-phase and thus be mounted on three busbars of a busbar system, each corresponding to one of three phases. The (possibly first) sliding element is arranged to be movable back and forth relative to the housing between a first position and a second position, and can be locked in both positions. The (possibly first) sliding element can be attached or fixed to the housing in such a way that it is movable back and forth between the first and second positions. In particular, the (possibly first) sliding element can be arranged to be movable linearly or substantially linearly relative to the housing between the first and second positions, especially along a Z-direction. The first position can be located in the negative Z-direction relative to the second position. The X-direction, Y-direction, and Z-direction are all perpendicular to each other. The contact element is arranged to be movable relative to the housing. In particular, the contact element can be arranged to be movable linearly or substantially linearly relative to the housing, especially along the Z-direction. The contact element can be arranged relative to the (possibly first) sliding element in the positive Z-direction. When the sliding element is in the first position, the distance, especially in the Z-direction, between the sliding element and the contact element can be greater than when the sliding element is in the second position. By moving the contact element relative to the housing, the distance, especially in the Z-direction, between the contact element and the sliding element (which is in the first or second position) can be increased. The position (where locked) can be changed. The contact element can, in particular, move towards and away from the sliding element. The (possibly first) sliding element and the contact element are configured to define a first receiving area for a first busbar of a first thickness when the sliding element is in the first position, and a second receiving area for a second busbar of a second thickness, which is smaller than the first thickness, when the slid