EP4287411A1 - Underplug protection part - Google Patents
Underplug protection part Download PDFInfo
- Publication number
- EP4287411A1 EP4287411A1 EP23168008.3A EP23168008A EP4287411A1 EP 4287411 A1 EP4287411 A1 EP 4287411A1 EP 23168008 A EP23168008 A EP 23168008A EP 4287411 A1 EP4287411 A1 EP 4287411A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- protection part
- under
- plug protection
- screw
- clamping frame
- 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.)
- Pending
Links
- 238000009434 installation Methods 0.000 claims description 30
- 239000004033 plastic Substances 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 4
- 238000009424 underpinning Methods 0.000 claims description 3
- 230000005489 elastic deformation Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 description 34
- 238000003780 insertion Methods 0.000 description 20
- 230000037431 insertion Effects 0.000 description 20
- 239000000463 material Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/22—Bases, e.g. strip, block, panel
- H01R9/24—Terminal blocks
- H01R9/2425—Structural association with built-in components
- H01R9/2433—Structural association with built-in components with built-in switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/36—Conductive members located under tip of screw
-
- 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
- H01H71/08—Terminals; Connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/305—Clamped connections, spring connections utilising a screw or nut clamping member having means for facilitating engagement of conductive member or for holding it in position
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/36—Conductive members located under tip of screw
- H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member
- H01R4/366—Conductive members located under tip of screw with intermediate part between tip and conductive member intermediate part attached to the tip of the screw
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/22—Bases, e.g. strip, block, panel
- H01R9/24—Terminal blocks
- H01R9/2416—Means for guiding or retaining wires or cables connected to terminal blocks
Definitions
- the present invention relates to an underplug protection part, a screw terminal and an installation device.
- Installation devices d. H. Electrical components used in distributions, which are often mounted on a top-hat rail, are usually connected to electrical lines using spring terminals or screw terminals.
- a stripped end of an electrical cable is inserted into a terminal chamber, also referred to as a conductor receiving space or simply as a chamber, and clamped therein by tightening a screw, which is also referred to as a clamping screw.
- Single-chamber terminals which have a single terminal chamber, are differentiated between pressure piece terminals and elevator terminals.
- Pressure piece clamps when the screw rotates, the screw with a pressure piece attached to the screw tip moves along the screw axis relative to a fixed clamping frame; Any existing terminal connection is fixed.
- Pressure piece clamps are e.g. Am DE8134378U (Siemens AG) February 25, 1982 and EP0735614A2 (Weidmüller Interface GmbH & Co.) October 2, 1996 disclosed.
- elevator clamps when the screw rotates, a clamping frame moves along the axis of the screw, while the screw itself does not experience any movement in the axial direction.
- Elevator clamps are e.g. Am DE1802558A1 (Woertz, Oskar, Basel, Switzerland) July 31, 1968 disclosed.
- Double chamber clamps have both a movable pressure piece and a movable clamp frame, both can be moved relative to a stationary terminal connection by turning the screw. This makes it possible to have an upper chamber between the pressure piece and the terminal connection and a lower chamber between the terminal connection and the underside of the terminal frame.
- Double chamber terminals are e.g. Am DE1935560U (Georg Schlegel, Electrotechnical Factory) March 31, 1966 and DE3314919A1 (Murr Elektronik GmbH) October 25, 1984 disclosed.
- Double-chamber terminals offer more convenience than single-chamber terminals because two cables with different diameters or one cable and a busbar can be connected in a double-chamber terminal.
- double chamber clamps like elevator clamps, have the following disadvantage: When the screw clamp is closed, the clamp frame moves upwards, i.e. H. towards the screw head. This makes a cavity accessible under the clamping frame. So there is a risk that an installer will not insert one end of the cable into the lower terminal chamber, but into the cavity underneath. This is facilitated by the fact that the installation situation is often poorly lit and cannot be seen directly.
- the installer may therefore mistakenly believe that he has inserted the end of the cable into the lower terminal chamber, when in fact he has inserted it into the cavity below, a so-called under-plugging, mis-plugging or behind-plugging.
- the incorrectly inserted cable end is therefore not clamped; Nevertheless, it can touch electrically active parts, which even makes it difficult to find the fault using a continuity tester. If a load current is applied, high heating and thus a destructive effect can occur due to the high contact resistance due to a lack of contact pressure.
- the object of the present invention is an improved underplug protection.
- the under-plug protection part is suitable for sliding onto a clamping frame of a screw terminal.
- the under-plug protection part has the shape of a closed frame which has two longitudinal elements lying opposite one another and a first and a second transverse element, which lie opposite one another and each connect the longitudinal elements to one another.
- the first transverse element has a feed-through opening for passing a screw shaft through.
- a cover apron that serves as under-plug protection is molded onto the second cross element.
- the invention is based on the finding that an underplug protection part in the form of a closed frame deforms significantly less, e.g. B. when an installer touches the cover skirt with one end of the conductor, as an under-plug protection part which does not have the shape of a closed frame; Therefore, an under-plug protection part in the form of a closed frame can be better guided in the housing of an installation device than a under-plug protection part which does not have the shape of a closed frame. Thus is It is also almost impossible for the under-plug protection part to get caught or wedged.
- the under-plug protection part according to the invention with its symmetrical shape has the advantage that forces acting on the frame are transmitted evenly through the frame.
- the under-plug protection part is therefore better guided and can be better attached to a clamping frame in which a screw, also known as a clamping screw, is guided in a threaded hole.
- the tight fit for example when an installer hits the cover skirt with the end of a conductor, is better with a symmetrical frame than with an asymmetrical frame.
- the closed frame shape allows the underplug protection part to be easily pushed onto a clamping frame of a screw terminal. Because the cover apron is molded onto the frame of the under-plug protection part, there is no need to have a holding contour on the clamping frame that is specifically used to fix the cover apron, e.g. B. a nose or a hole can be provided.
- the underplug protection part according to the invention can therefore be used on several different clamping frames.
- the first transverse element forms a ring which encloses the feed-through opening.
- the under-plug protection part must be pushed over a clamping frame before the pressure piece is attached to the clamping frame together with the clamping screw.
- the advantage of this configuration is that the under-plug protection part is fixed to the clamping frame by a clamping screw guided in the clamping frame; the tight fit is therefore very stable.
- the first transverse element forms a semicircular arch which encloses the feed-through opening on three sides.
- the under-plug protection part can then be pushed onto the clamping frame from the side before mounting the pressure piece on the clamping frame.
- the advantage of this configuration is that an under-plug protection part with a semicircular arc can be assembled better than an under-plug protection part with a closed ring.
- a further advantage of this configuration is that only an open-close injection molding tool is required for the production of the underplug protection part, whereas a side slide in the injection molding tool is required for the production of a variant of the underplug protection part, in which the first cross element has a ring surrounding the feed-through opening becomes.
- the semicircular arch has a separating joint in the area of an arch apex of the arch, preferably separating the arch into two arch segments of equal length.
- the cover apron is designed as a plate which lies parallel to the plane spanned by the longitudinal and transverse elements.
- the advantage here is that the parallel position effectively prevents a terminal chamber from being plugged underneath a screw terminal.
- At least one spring element is formed on the second transverse element, which is designed so that an elastic deformation of the spring element, which occurs when the under-plug protection part moves in a direction parallel to the longitudinal elements in the direction from the first transverse element to the second transverse element, leading to a restoring force in an opposite direction.
- the advantage here is that the spring element exerts an upward force on the clamping frame and thus creates a forced position of the clamping frame:
- the spring elements under the clamping frame ensure that the upper clamping chamber, also referred to as the upper conductor insertion opening, is completely open and the lower clamping chamber, also referred to as the lower conductor insertion opening, is kept closed except for a small gap, preferably approx.
- the delivery status of the screw terminal mounted in the installation device is as follows: The upper chamber of the screw terminal is completely open to enable conductor insertion of even the thickest conductor end.
- the lower chamber of the screw clamp is almost closed: the spring elements, which are preferably designed as little legs, push the clamp frame upwards due to their spring force;
- the clamping frame remains in a position where the spring legs are completely relaxed and the lower conductor insertion opening has an opening height of 1.5 mm: this opening of 1.5 mm is sufficient for inserting the contact tabs of a busbar.
- the installer can use a screwdriver or similar tool to press the clamping frame down against the force of the spring legs while turning the clamping screw.
- a further embodiment of the invention is an underplug protection part, manufactured by plastic injection molding.
- PA66 can be used without fiberglass reinforcement, which gives the underpinning protection part relatively high flexibility.
- a further embodiment of the invention is a screw clamp in the manner of an elevator clamp.
- the screw terminal has a clamping frame with a head bar and a bottom bar, which lie opposite one another.
- the screw terminal has a screw which is screwably mounted in a threaded hole in the head web; this screw is also known as a clamping screw.
- the screw terminal also has an underplug protection part, as described above.
- the under-plug protection part encloses the clamping frame, the through opening of the under-plug protection part is arranged in alignment with the threaded hole and the cover skirt of the under-plug protection part projects beyond the base web in the direction away from the head web.
- the head web carries on its outside facing away from the base web a threaded flange which encloses the threaded hole, the first transverse element of the under-plug protection part having an inner corner along the feed-through opening on its side facing the second transverse element, against which the threaded flange rests.
- the screw terminal is a double-chamber terminal.
- the under-plug protection part sits on the clamping frame in such a way that the two longitudinal elements of the under-plug protection part divide side parts of the clamping frame, which each extend between the head web and the bottom web, into contact surfaces of approximately the same size.
- the side parts of the clamping frame connect the head bar and the bottom bar of the clamping frame to each other at their ends, thus forming the clamping frame just like the head bar and the bottom bar.
- the two longitudinal elements of the base protection part run approximately along a line which bisects the side parts of the clamping frame from the head bar and the bottom bar.
- Decisive is not that the longitudinal elements of the under-plug protection part run exactly in the vertical center line of the side parts of the clamping frame, but that the side parts of the clamping frame each have a contact surface on their outer edges. It is advantageous that a screw torque, which is caused by turning a screw to move the clamping frame and the pressure piece, can be transferred to the housing of the installation device via the contact surfaces of the clamping frame; otherwise, ie if this screw torque were to be transferred to the housing of the installation device via the longitudinal elements of the under-plug protection part, there is a risk that the resulting increased friction between the under-plug protection part and the housing has a detrimental effect on movement of the screw terminal. Due to the symmetrical positioning of the under-plug protection part on the clamping frame, contact surfaces of approximately the same size are formed on the outside of the side parts of the clamping frame.
- a further embodiment of the invention is an installation device with a screw terminal, as described above.
- the installation device can be divided into two housing halves. Before plugging the two housing halves together, the screw terminal can be inserted into one of the two housing halves.
- the installation device can be any device that has screw terminals for holding and fixing conductor ends of electrical cables.
- the installation device can be an installation switching device such as an Air Circuit Breaker, Arc Fault Detection Device, Arc Fault Circuit Interrupter, Circuit Breaker, Electronically Controlled Protection Device, Miniature Circuit Breaker, Molded Case Circuit Breaker, Residual current operated Circuit-Breaker with Overcurrent protection, Residual Current Device, Residual Current Circuit Breaker or Surge Protection Device.
- Fig. 1 shows an underplug protection part 1, which is suitable for sliding onto a clamping frame of a screw terminal.
- a right-handed Cartesian coordinate network is given.
- the terms "top” and “bottom” are used in relation to the under-plug protection part 1, as is the under-plug protection part 1 in Fig. 1 is oriented; However, these directional or location information should not be restrictive for the position of the under-plug protection part 1 in an actual application.
- the under-plug protection part 1 has the shape of a closed frame lying in the x-y plane, which has two longitudinal elements L1, L2 opposite one another at a clear distance l in the y-direction and a first and a second transverse element Q1, Q2 in the x-direction.
- the first cross element Q1 can also be referred to as an upper cross element and the second cross element Q2 can also be referred to as a lower cross element.
- the two transverse elements Q1, Q2 lie opposite each other at a clear distance q and connect the longitudinal elements L1, L2 to each other at their ends.
- the two longitudinal elements L1, L2 have a rectangular cross section; They have two wider side surfaces, whose surface normals are parallel to the x-axis, and two narrower side surfaces whose surface normals are parallel to the z-axis.
- the first transverse element Q1 forms a ring 10 which encloses a circular feed-through opening A for passing through a screw shaft.
- the second transverse element Q2 has a rectangular cross section, similar to the longitudinal elements L1, L2.
- a web 14 is formed on a narrow side surface of the second transverse element Q2, which carries a cover apron S in the form of a square plate that serves as an underpinning protection.
- the plane of the web 14 lies parallel to the xz plane, while the plane of the cover skirt S lies parallel to the xy plane.
- the cover skirt S projects beyond the second transverse element Q2 in a direction facing away from the first transverse element Q1.
- a nose 15 is formed in the middle, which protrudes from the edge against the y-direction and contributes to its function Fig. 6 is described.
- the nose can have a rectangular, preferably square, outline when viewed in the z direction.
- a spring element F in the form of a foot is formed on each of the two frame corners of the under-plug protection part 1, which are formed by the transitions from the longitudinal elements L1, L2 to the second transverse element Q2.
- the two spring elements F each have the shape of a 90° arc, with the two arcs pointing towards each other. While the plane of the cover skirt S is offset in the z-direction to the frame plane of the under-plug protection part 1, the spring elements F are offset against the z-direction to the frame plane of the under-plug protection part 1. If the under-plug protection part 1 is moved counter to the y-direction against a fixed surface, the spring elements F are bent, which leads to a spring force in the y-direction.
- Fig. 2 shows that in Fig. 1 Under-plug protection part 1 shown is pushed onto a clamping frame 2 of a screw terminal.
- a right-handed Cartesian coordinate network is given.
- the clear distances l, q of the longitudinal and transverse elements L1, L2 and Q1, Q2 are dimensioned such that the under-plug protection part 1 only has enough play against the clamping frame 2 so that the under-plug protection part 1 can be pushed manually onto the clamping frame 2 is, but on the other hand, an unwanted and disruptive movement of the under-plug protection part 1 pushed onto the clamping frame 2 is prevented relative to the clamping frame 2.
- the clamping frame 2 has the shape of a closed frame lying in the xy plane, which has two opposite side parts 21, 22 in the y direction and a head web 23 and a bottom web 24, each in the x direction.
- the head web 23 and the bottom web 24 connect the side parts 21, 22 to each other at their ends.
- the frame elements forming the clamping frame ie the two side parts 21, 22, the head web 23 and the bottom web 24, each have a rectangular cross section; These frame elements each have two wider side surfaces, whose surface normals lie parallel to the xy plane, and two narrower side surfaces, whose surface normals lie parallel to the z-axis.
- In the middle of the head web 23 there is a circular threaded hole 26 for receiving a screw, the axis of which runs in the y-direction.
- the head web 23 carries a threaded flange 25 on its outside facing away from the bottom web 24, which encloses the threaded bore 26.
- the surface of the bottom web 24 facing the head web 23 is designed as a profiled surface 27 in the form of ribs;
- An end of a line which usually has a conductor (solid wire or stranded wire) made of a relatively soft metal such as copper or aluminum, can be inserted into the profile 27 of the floor web 24, which is preferably made of a relatively hard metal such as iron or steel
- Contact pressure of a screw mounted screwably in the threaded hole 26 can be pressed in so that the conductor can be clamped there particularly securely (frictional connection + positive connection).
- the under-plug protection part 1 encloses the clamping frame 2 on its entire outer circumference, the passage opening A of the under-plug protection part 1 being arranged in alignment with the threaded hole 26 of the clamping frame 2 and the cover skirt S of the under-plug protection part 1 protruding beyond the base web 24 in a direction facing away from the head web 23.
- the first transverse element Q1 of the under-plug protection part 1 has an inner corner on its side facing the second transverse element Q2 along the feed-through opening A, against which the threaded flange 25 of the clamping frame 2 rests.
- Fig. 3 shows two different views of an alternative variant of the under-plug protection part 1. All elements of the in Fig. 3 shown underplug protection part 1 except the first cross element Q1 are designed the same as that in the Fig. 1 and 2 shown under-plug protection part 1. Different than in Fig. 1 and 2 forms at the in Fig. 3 shown under-plug protection part 1, the first cross element Q1 has a semicircular arch 11, which encloses the feed-through opening A on three sides. The opening of the semicircular arch 11 is arranged on the side of the under-plug protection part 1 opposite the cover apron S.
- Fig. 4 shows two different views of another alternative variant of the under-plug protection part 1. All elements of the in Fig. 4 shown underplug protection part 1 except the first cross element Q1 are designed the same as in the Fig. 1 to 3 shown under-plug protection parts 1. As in Fig. 3 points to the in Fig. 4 shown under-plug protection part 1, the first cross element Q1 has a semicircular arc 11, which encloses the feed-through opening A on three sides. However, the semicircular arch 11 has one in the area of an arch apex of the arch 11 Parting line 12.
- the arch halves 11a, 11b of the arch 11, which are separated by the parting line 12, can be bent open so that they can be guided over a pressure piece mounted on a screw, see Fig. 5 .
- This flexibility is achieved by the under-plug protection part 1 made of a plastic, e.g. B. PA66 without fiberglass reinforcement.
- Fig. 5 shows a screw clamp 3 of the elevator clamp type, which has a clamping frame 2, an under-plug protection part 1 pushed onto the clamping frame 2, a screw 30 screwably mounted in the clamping frame, a pressure piece 40 mounted on a screw head of the screw 30 and a gripping protection 42 attached to the pressure piece 40 having.
- the reach-around protection prevents the fitter from reaching around the installation device, e.g. B. when mounting on the top-hat rail or when moving, the fitter's hand comes into contact with conductive components.
- the screw terminal 3 is suitable for use in an installation device; there is in Fig. 5 a terminal connection K of the installation device is also shown, which protrudes into the interior of the clamping frame 2.
- the terms "top” and "bottom” are used with respect to the screw terminal 3, as is the screw terminal 3 in Fig. 5 is oriented; However, these directional or location information should not be restrictive for the position of the screw terminal in an actual application.
- the screw 30 has a screw head with a cross slot for attaching a corresponding screwdriver and a threaded body adjoining the screw head, the screw being inserted from above into a threaded hole in the clamping frame 2, as in Fig. 2 shown is screwed in.
- the pressure piece becomes 40 moves from above and the bottom web 24 from below against the terminal connection K.
- a head plate of the pressure piece 40 lies around the screw head of the screw 30, so that an axial movement of the screw generates a corresponding movement of the pressure piece.
- the pressure piece 40 can be made of tin-plated steel
- the clamping frame 2 can be made of copper-plated steel
- the grip protection 42 can be made of plastic
- the under-plug protection part 1 can be made of plastic
- the screw 30 can be made of steel.
- Fig. 6 is a side view of the in Fig. 5 screw terminal 3 shown, inserted into a second housing half-shell 62 of a housing 60 of an installation device 4.
- the screw shaft 32 of the screw 30, which is provided with a screw thread can be seen, as well as the pressure piece 40, which has a ring element placed around the screw head 31 of the screw 30, so that an axial movement of the screw head 31 results in a movement of the pressure piece 40 relative to the fixed terminal connection K im Interior of the clamping frame 2 leads.
- the downwardly projecting nose 15 formed on the cover apron S always remains behind the beveled frame 68 in every position of the cover apron S, see Fig. 12 , and thus provides guidance for the cover apron S.
- Fig. 7 is a sectional view of the in Fig. 5 screw terminal 3 shown, inserted into the housing 60 of the installation device 4, which is formed from a first housing half-shell 61 and a second housing half-shell 62.
- a state of the screw terminal 3 is shown in which an upper conductor insertion opening 66, which lies between the pressure piece 40 and the terminal connection K, is opened and a lower conductor insertion opening 67, which lies between the terminal connection K and the bottom web 24 of the clamping frame 2, closed is.
- a cavity located below the base web 24 of the clamping frame 2 is covered by the cover skirt S in such a way that a conductor end is prevented from being inserted underneath.
- the downward-pointing nose 15, which is formed centrally on the downward-pointing edge of the cover apron S, ensures that the cover apron S does not thread out of the lower conductor insertion opening 67 in any part tolerance situation.
- the entire lower edge of the cover skirt S could alternatively be extended to the lower edge of the nose 15, which would require more material than if only the centrally arranged nose 15 was formed.
- a material-intensive extension of the entire cover apron S is not necessary, since the cover apron S does not have to hermetically seal the lower conductor insertion opening 67, but rather only has to prevent a conductor, which always has a certain minimum thickness, from being inserted into the lower conductor insertion opening 67.
- the projection of the nose 15 downwards over the lower edge of the cover skirt S is therefore chosen to be approximately as large as the minimum diameter of a conductor end.
- FIG. 8 and 9 are oblique views of the in Fig. 5 screw terminal 3 shown, inserted into a housing 60 of an installation device 4; thereby showing Fig. 8 the screw terminal 3 in the open state and Fig. 9 the screw terminal 3 in the closed state.
- Both figures show an access opening 65 arranged in the housing 60, through which the screw head of the screw 30 of the screw terminal 3 is accessible, so that it can be used, for example. B. can be applied with a screwdriver.
- Fig. 10 is a side view of the in Fig. 5 screw terminal 3 shown, inserted into a first housing half-shell 61 of a housing 60 of an installation device 4, which has a slide manual actuation 50;
- the slide manual actuation 50 enables the installation device 4 to be released from a top-hat rail or from a busbar assembly without tools.
- Fig. 11 and 12 are oblique views of the in Fig. 5 screw terminal 3 shown, inserted into a housing 60 of an installation device 4, which has a slide manual actuation 50.
- Fig. 11 shows the screw terminal 3 in the open state
- Fig. 12 the screw terminal 3 in the closed state. Both figures show an access opening 65 arranged in the housing 60, through which the screw head of the screw 30 of the screw terminal 3 is accessible, so that it can be used, for example. B. can be applied with a screwdriver.
- the distance between the lower edge S1 of the cover skirt S and the upper edge 68K of the cover 68 formed on the housing 60 is smaller than the smallest possible diameter of a conductor end.
- the downward-pointing nose 15, which is formed centrally on the downward-pointing edge S1 of the cover apron S, ensures that the cover apron S does not thread out of the lower conductor insertion opening 67 in any part tolerance situation; in other words: the nose prevents the cover skirt S from getting in front of the cover 68.
- the entire lower edge of the cover skirt S could alternatively be extended to the lower edge of the nose 15, which would require more material than if only the centrally arranged nose 15 was formed. But a material-intensive extension of the entire cover apron S is not necessary, since the cover apron S does not have to hermetically seal the lower conductor insertion opening 67, but rather only has to prevent a conductor, which always has a certain minimum thickness, from being inserted underneath.
- the projection of the nose 15 downwards over the lower edge of the cover skirt S is therefore chosen to be approximately as large as the minimum diameter of a conductor end.
- Fig. 13 shows a side view of an underplug protection part 1, which is pushed onto a clamping frame 2 of a screw terminal.
- the under-plug protection part 1 has the shape of a closed frame with two longitudinal elements and two transverse elements connecting the longitudinal elements, of which in Fig. 13 a first longitudinal element L1 and the two transverse elements Q1, Q2 are visible.
- a first transverse element Q1 has a through opening A for passing through a screw shaft.
- a web 14 running in the z-direction is formed on the second transverse element Q2 and has a plate-shaped cover apron S that serves as under-plug protection extends in the xy plane.
- the clamping frame 2 has the shape of a closed frame with four frame elements, of which in Fig. 13 a first side part 22, a head bar 23 and a bottom bar 24 are visible.
- the cover apron S is positioned on the under-protection part 1 in such a way that the lower edge S1, i.e. H. the side edge of the cover skirt S facing away from the first transverse element Q1, the lower edge 24UK of the floor web 24, d. H. the side of the bottom web 24 facing away from the head web 23, in a direction facing away from the head web 23, i.e. H. counter to the y-direction, by a support length b.
- the support length b is chosen so that the cover skirt S prevents a clamping chamber of a screw terminal from being inserted under it in all possible positions of the clamping frame 2.
- This in Fig. 13 Under-plug protection part 1 shown differs from that in Fig. 1 shown underplug protection part 1 essentially in the following points: a) the web 14 of the in Fig. 13 Under-plug protection part 1 shown is attached to the underside of the second cross element Q2, whereas the web 14 of the in Fig. 1 illustrated underplug protection part 1 is attached to the front of the second cross element Q2; b) the in Fig. 13 Under-plug protection part 1 shown has no spring elements F; and c) the in Fig. 13 Under-plug protection part 1 shown has no nose 15 on the lower edge S1 of the cover apron S.
- the under-plug protection part 1 is designed in such a way that its longitudinal elements L1, L2 are located approximately in the middle of the side parts 21, 22 of the clamping frame 2 and is plugged onto the under-plug protection part 1; That is, in a view of the clamping frame 2 against the x direction, the longitudinal elements L1, L2 divide the side parts 21, 22 of the clamping frame 2 into contact surfaces of approximately the same size, namely a front contact surface C1 and a rear contact surface C2. In these contact surfaces C1, C2, the clamping frame 2 supports the screw tightening torque, which is in a relatively high value range, e.g. b. at 3.5 Nm, can be in the housing 60.
Landscapes
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Abstract
Die Erfindung betrifft ein Untersteckschutzteil (1) zum Aufschieben auf einen Klemmrahmen (2) einer Schraubklemme (3),- wobei das Untersteckschutzteil (1) die Form eines geschlossenen Rahmens hat, der zwei einander gegenüberliegende Längselemente (L1, L2) und ein erstes und ein zweites Querelement (Q1, Q2), die einander gegenüberliegen und die Längselemente jeweils miteinander verbinden, aufweist,- wobei das erste Querelement (Q1) eine Durchführöffnung (A) zum Durchführen eines Schraubenschafts aufweist und- wobei an das zweite Querelement (Q2) eine als Untersteckschutz dienende Abdeckschürze (S) angeformt ist.The invention relates to an under-plug protection part (1) for sliding onto a clamping frame (2) of a screw terminal (3), - the under-plug protection part (1) has the shape of a closed frame, which has two opposing longitudinal elements (L1, L2) and a first and a second transverse element (Q1, Q2), which lie opposite one another and each connect the longitudinal elements to one another, - the first transverse element (Q1) having a through opening (A) for passing through a screw shaft and - wherein on the second transverse element (Q2) a A cover apron (S) serving as under-plug protection is formed.
Description
Die vorliegende Erfindung betrifft ein Untersteckschutzteil, eine Schraubklemme und ein Installationsgerät.The present invention relates to an underplug protection part, a screw terminal and an installation device.
Installationsgeräte, d. h. in Verteilungen eingesetzte elektrotechnische Bauteile, die in vielen Fällen auf einer Hutschiene montiert sind, werden in der Regel mittels Federklemmen oder Schraubklemmen an elektrische Leitungen angeschlossen.Installation devices, d. H. Electrical components used in distributions, which are often mounted on a top-hat rail, are usually connected to electrical lines using spring terminals or screw terminals.
Bei Schraubklemmen unterscheidet man Einkammer- und Doppelkammerklemmen, je nachdem, ob die Schraubklemme eine oder zwei Klemmenkammern aufweist. In eine Klemmenkammer, auch als Leiteraufnahmeraum oder einfach als Kammer bezeichnet, wird ein abisoliertes Leitungsende einer elektrischen Leitung eingeführt und darin durch Anziehen einer Schraube, die auch als Klemmschraube bezeichnet wird, geklemmt.When it comes to screw terminals, a distinction is made between single-chamber and double-chamber terminals, depending on whether the screw terminal has one or two terminal chambers. A stripped end of an electrical cable is inserted into a terminal chamber, also referred to as a conductor receiving space or simply as a chamber, and clamped therein by tightening a screw, which is also referred to as a clamping screw.
Bei Einkammerklemmen, die eine einzige Klemmenkammer aufweisen, unterscheidet man Druckstückklemmen und Fahrstuhlklemmen. Bei Druckstückklemmen bewegt sich bei einer Drehung der Schraube die Schraube mit einem an der Schraubenspitze angesetzten Druckstück entlang der Schraubenachse relativ zu einem feststehenden Klemmrahmen; ein eventuell vorhandener Klemmenanschluss ist feststehend. Druckstückklemmen sind z. B. in
Doppelkammerklemmen haben sowohl ein verschiebliches Druckstück als auch einen verschieblichen Klemmrahmen, die beide durch Drehen der Schraube relativ zu einem ortsfesten Klemmenanschluss bewegt werden können. Dadurch ist eine obere Kammer zwischen dem Druckstück und dem Klemmenanschluss und eine untere Kammer zwischen dem Klemmenanschluss und einer Klemmrahmenunterseite möglich. Doppelkammerklemmen sind z. B. in
Doppelkammerklemmen bieten mehr Komfort als Einkammerklemmen, da in einer Doppelkammerklemme zwei Leitungen mit unterschiedlichen Durchmessern oder eine Leitung und eine Sammelschiene angeschlossen werden können. Allerdings haben Doppelkammerklemmen, ebenso wie Fahrstuhlklemmen, folgenden Nachteil: Beim Schließen der Schraubklemme bewegt sich der Klemmrahmen nach oben, d. h. in Richtung Schraubenkopf. Dadurch wird unter dem Klemmrahmen ein Hohlraum zugänglich. Also besteht das Risiko, dass ein Installateur ein Leitungsende nicht in die untere Klemmenkammer, sondern in den darunter liegenden Hohlraum einsteckt. Dies wird dadurch begünstigt, dass die Einbausituation oft schlecht beleuchtet und nicht direkt einsehbar ist. Der Installateur kann also irrtümlich der Meinung sein, er habe das Leitungsende in die untere Klemmenkammer eingesteckt, obwohl er es tatsächlich in den Hohlraum darunter eingeführt hat, ein sogenanntes Unter-, Fehl- oder Hinterstecken. Beim Anziehen der Schraube wird das falsch eingesteckte Leitungsende daher nicht geklemmt; gleichwohl kann es elektrisch aktive Teile berühren, was sogar das Auffinden des Fehlers mittels eines Durchgangsprüfers erschwert. Bei Anliegen eines Laststromes kann es dann wegen des hohen Übergangswiderstands aufgrund eines fehlenden Kontaktdrucks zu einer hohen Erwärmung und somit einer Zerstörungswirkung kommen.Double-chamber terminals offer more convenience than single-chamber terminals because two cables with different diameters or one cable and a busbar can be connected in a double-chamber terminal. However, double chamber clamps, like elevator clamps, have the following disadvantage: When the screw clamp is closed, the clamp frame moves upwards, i.e. H. towards the screw head. This makes a cavity accessible under the clamping frame. So there is a risk that an installer will not insert one end of the cable into the lower terminal chamber, but into the cavity underneath. This is facilitated by the fact that the installation situation is often poorly lit and cannot be seen directly. The installer may therefore mistakenly believe that he has inserted the end of the cable into the lower terminal chamber, when in fact he has inserted it into the cavity below, a so-called under-plugging, mis-plugging or behind-plugging. When tightening the screw, the incorrectly inserted cable end is therefore not clamped; Nevertheless, it can touch electrically active parts, which even makes it difficult to find the fault using a continuity tester. If a load current is applied, high heating and thus a destructive effect can occur due to the high contact resistance due to a lack of contact pressure.
Aufgabe der vorliegenden Erfindung ist ein verbesserter Untersteckschutz.The object of the present invention is an improved underplug protection.
Diese Aufgabe wird erfindungsgemäß durch ein Untersteckschutzteil mit den in Anspruch 1 angegebenen Merkmalen gelöst. Das Untersteckschutzteil ist geeignet zum Aufschieben auf einen Klemmrahmen einer Schraubklemme. Dabei hat das Untersteckschutzteil die Form eines geschlossenen Rahmens, der zwei einander gegenüberliegende Längselemente und ein erstes und ein zweites Querelement, die einander gegenüberliegen und die Längselemente jeweils miteinander verbinden, aufweist. Das erste Querelement weist dabei eine Durchführöffnung zum Durchführen eines Schraubenschafts auf. Und an das zweite Querelement ist eine als Untersteckschutz dienende Abdeckschürze angeformt.This object is achieved according to the invention by an underplug protection part with the features specified in
Der Erfindung liegt die Erkenntnis zugrunde, dass ein Untersteckschutzteil in Form eines geschlossenen Rahmens sich signifikant weniger verformt, z. B. wenn ein Installateur mit einem Leiterende die Abdeckschürze berührt, als ein Untersteckschutzteil, welches nicht die Form eines geschlossenen Rahmens aufweist; daher ist ein Untersteckschutzteil in Form eines geschlossenen Rahmens besser im Gehäuse eines Installationsgerät führbar als ein Untersteckschutzteil, welches nicht die Form eines geschlossenen Rahmen aufweist. Somit ist auch ein Verhaken oder Verkeilen des Untersteckschutzteils fast ausgeschlossen.The invention is based on the finding that an underplug protection part in the form of a closed frame deforms significantly less, e.g. B. when an installer touches the cover skirt with one end of the conductor, as an under-plug protection part which does not have the shape of a closed frame; Therefore, an under-plug protection part in the form of a closed frame can be better guided in the housing of an installation device than a under-plug protection part which does not have the shape of a closed frame. Thus is It is also almost impossible for the under-plug protection part to get caught or wedged.
Gegenüber einem Untersteckschutzteil, welches nicht die Form eines geschlossenen Rahmens aufweist, weist das erfindungsgemäße Untersteckschutzteil mit seiner symmetrischen Form den Vorteil auf, dass auf den Rahmen einwirkende Kräfte durch den Rahmen gleichmäßig übertragen werden. Das Untersteckschutzteil ist dadurch besser geführt und besser an einem Klemmrahmen, in dem eine auch als Klemmschraube bezeichnete Schraube in einer Gewindebohrung geführt ist, befestigbar. Der Festsitz, beispielsweise, wenn ein Installateur mit einem Leiterende an die Abdeckschürze stößt, ist bei einem symmetrischen Rahmen besser als bei einem asymmetrischen Rahmen.Compared to an under-plug protection part, which does not have the shape of a closed frame, the under-plug protection part according to the invention with its symmetrical shape has the advantage that forces acting on the frame are transmitted evenly through the frame. The under-plug protection part is therefore better guided and can be better attached to a clamping frame in which a screw, also known as a clamping screw, is guided in a threaded hole. The tight fit, for example when an installer hits the cover skirt with the end of a conductor, is better with a symmetrical frame than with an asymmetrical frame.
Außerdem erlaubt es die geschlossene Rahmenform, das Untersteckschutzteil einfach über einen Klemmrahmen einer Schraubklemme aufzuschieben. Dadurch, dass die Abdeckschürze an den Rahmen des Untersteckschutzteils angeformt ist, muss am Klemmrahmen nicht eine eigens einer Fixierung der Abdeckschürze dienende Haltekontur, z. B. eine Nase oder ein Loch, vorgesehen werden. Das erfindungsgemäße Untersteckschutzteil kann also an mehreren unterschiedlichen Klemmrahmen verwendet werden.In addition, the closed frame shape allows the underplug protection part to be easily pushed onto a clamping frame of a screw terminal. Because the cover apron is molded onto the frame of the under-plug protection part, there is no need to have a holding contour on the clamping frame that is specifically used to fix the cover apron, e.g. B. a nose or a hole can be provided. The underplug protection part according to the invention can therefore be used on several different clamping frames.
Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.Advantageous refinements and further developments of the invention are specified in the dependent claims.
Gemäß einer bevorzugten Ausgestaltung der Erfindung bildet das erste Querelement einen Ring, der die Durchführöffnung umschließt. In diesem Fall muss das Untersteckschutzteil über einen Klemmrahmen geschoben werden, bevor das Druckstück zusammen mit der Klemmschraube an dem Klemmrahmen befestigt wird. Von Vorteil an dieser Ausgestaltung ist dabei, dass das Untersteckschutzteil durch eine im Klemmrahmen geführte Klemmschraube am Klemmrahmen fixiert wird; der Festsitz ist daher sehr stabil.According to a preferred embodiment of the invention, the first transverse element forms a ring which encloses the feed-through opening. In this case, the under-plug protection part must be pushed over a clamping frame before the pressure piece is attached to the clamping frame together with the clamping screw. The advantage of this configuration is that the under-plug protection part is fixed to the clamping frame by a clamping screw guided in the clamping frame; the tight fit is therefore very stable.
Gemäß einer bevorzugten Ausgestaltung der Erfindung bildet das erste Querelement einen halbkreisförmigen Bogen, der die Durchführöffnung auf drei Seiten einschließt. Das Untersteckschutzteil kann dann vor der Montage des Druckstücks am Klemmrahmen von der Seite auf den Klemmrahmen aufgeschoben werden. Von Vorteil an dieser Ausgestaltung ist dabei, dass sich ein Untersteckschutzteil mit einem halbkreisförmigen Bogen besser montieren lässt als ein Untersteckschutzteil mit einem geschlossenen Ring. Ein weiterer Vorteil an dieser Ausgestaltung ist, dass für die Herstellung des Untersteckschutzteils nur ein Auf-Zu-Spritzgießwerkzeug benötigt wird, wohingegen für die Herstellung einer Variante des Untersteckschutzteils, bei der das erste Querelement einen die Durchführöffnung umschließenden Ring aufweist, ein Seitenschieber im Spritzgießwerkzeug benötigt wird.According to a preferred embodiment of the invention, the first transverse element forms a semicircular arch which encloses the feed-through opening on three sides. The under-plug protection part can then be pushed onto the clamping frame from the side before mounting the pressure piece on the clamping frame. The advantage of this configuration is that an under-plug protection part with a semicircular arc can be assembled better than an under-plug protection part with a closed ring. A further advantage of this configuration is that only an open-close injection molding tool is required for the production of the underplug protection part, whereas a side slide in the injection molding tool is required for the production of a variant of the underplug protection part, in which the first cross element has a ring surrounding the feed-through opening becomes.
Gemäß einer bevorzugten Ausgestaltung der Erfindung weist der halbkreisförmige Bogen im Bereich eines Bogenscheitels des Bogens, vorzugsweise den Bogen in zwei gleichlange Bogensegmente trennend, eine Trennfuge auf. Von Vorteil an dieser Ausgestaltung ist, dass sich das Untersteckschutzteil auf einen Klemmrahmen montieren lässt, an dem ein Druckstück bereits montiert ist: durch die Trennfuge können die Enden der durch die Trennfuge getrennten Bogensegmente auseinandergebogen und um das Druckstück herumgeführt werden.According to a preferred embodiment of the invention, the semicircular arch has a separating joint in the area of an arch apex of the arch, preferably separating the arch into two arch segments of equal length. The advantage of this configuration is that the under-plug protection part can be mounted on a clamping frame on which a pressure piece is already mounted: through the parting joint, the ends of the arch segments separated by the parting joint can be bent apart and guided around the pressure piece.
Gemäß einer bevorzugten Ausgestaltung der Erfindung ist die Abdeckschürze als eine Platte ausgebildet ist, die parallel zu der durch die Längs- und Querelemente aufgespannten Ebene liegt. Von Vorteil ist dabei, dass die parallele Lage ein Unterstecken einer Klemmkammer einer Schraubklemme effektiv verhindert.According to a preferred embodiment of the invention, the cover apron is designed as a plate which lies parallel to the plane spanned by the longitudinal and transverse elements. The advantage here is that the parallel position effectively prevents a terminal chamber from being plugged underneath a screw terminal.
Gemäß einer bevorzugten Ausgestaltung der Erfindung ist an das zweite Querelement mindestens ein Federelement angeformt, welches so ausgebildet ist, dass eine elastische Verformung der Federelements, welche bei einer Bewegung des Untersteckschutzteils in einer Richtung parallel zu den Längselementen in Richtung von dem ersten Querelement zu dem zweiten Querelement erfolgt, zu einer Rückstellkraft in einer entgegengesetzten Richtung führt. Von Vorteil ist dabei, dass das Federelement eine Kraft auf den Klemmrahmen nach oben ausübt und somit eine Zwangsposition des Klemmrahmens schaffen: Die Federelemente unter dem Klemmrahmen sorgen dafür, dass die obere Klemmkammer, auch als obere Leitereinführöffnung bezeichnet, vollständig offen und die untere Klemmkammer, auch als untere Leitereinführöffnung bezeichnet, bis auf einen kleinen Spalt, vorzugsweise ca. 1,5 mm, ausreichend für Kontaktzungen einer Sammelschiene, geschlossen gehalten wird. Dadurch ist die untere Klemmkammer einer Doppelkammerklemme nahezu geschlossen und die obere Klemmkammer komplett geöffnet, so wie es der Installateur zu Beginn beim Anklemmen als Auslieferungszustand des Installationsgeräts erwartet.According to a preferred embodiment of the invention, at least one spring element is formed on the second transverse element, which is designed so that an elastic deformation of the spring element, which occurs when the under-plug protection part moves in a direction parallel to the longitudinal elements in the direction from the first transverse element to the second transverse element, leading to a restoring force in an opposite direction. The advantage here is that the spring element exerts an upward force on the clamping frame and thus creates a forced position of the clamping frame: The spring elements under the clamping frame ensure that the upper clamping chamber, also referred to as the upper conductor insertion opening, is completely open and the lower clamping chamber, also referred to as the lower conductor insertion opening, is kept closed except for a small gap, preferably approx. 1.5 mm, sufficient for contact tabs of a busbar. As a result, the lower clamping chamber of a double-chamber clamp is almost closed and the upper clamping chamber is completely open, just as the installer expects at the beginning of the connection as the delivery state of the installation device.
Der Auslieferungszustand der in dem Installationsgerät montierten Schraubklemme ist dabei wie folgt: Die obere Kammer der Schraubklemme ist komplett offen, um eine Leitereinführung auch eines maximal dicken Leiterendes zu ermöglichen. Die untere Kammer der Schraubklemme ist nahezu geschlossen: die vorzugsweise als Beinchen ausgebildeten Federelemente drücken durch ihre Federkraft den Klemmrahmen nach oben; der Klemmrahmen bleibt steht an einer Position, an der die Federbeinchen vollständig entspannt sind und die untere Leitereinführöffnung eine Öffnungshöhe von 1,5 mm aufweist: diese Öffnung von 1,5 mm reicht für das Einschieben der Kontaktzungen einer Sammelschiene. Zum Anschließen dickerer Leiter kann der Monteur mit einem Schraubenzieher oder einem ähnlichen Werkzeug den Klemmrahmen gegen die Kraft der Federbeinchen nach unten drücken, während er an der Klemmschraube dreht.The delivery status of the screw terminal mounted in the installation device is as follows: The upper chamber of the screw terminal is completely open to enable conductor insertion of even the thickest conductor end. The lower chamber of the screw clamp is almost closed: the spring elements, which are preferably designed as little legs, push the clamp frame upwards due to their spring force; The clamping frame remains in a position where the spring legs are completely relaxed and the lower conductor insertion opening has an opening height of 1.5 mm: this opening of 1.5 mm is sufficient for inserting the contact tabs of a busbar. To connect thicker conductors, the installer can use a screwdriver or similar tool to press the clamping frame down against the force of the spring legs while turning the clamping screw.
Eine weitere Ausgestaltung der Erfindung ist ein Untersteckschutzteil, hergestellt durch Kunststoff-Spritzguss. Zum Beispiel kann PA66 ohne Glasfaserbewehrung verwendet werden, was dem Untersteckschutzteil eine relativ hohe Biegsamkeit verleiht.A further embodiment of the invention is an underplug protection part, manufactured by plastic injection molding. For example, PA66 can be used without fiberglass reinforcement, which gives the underpinning protection part relatively high flexibility.
Eine weitere Ausgestaltung der Erfindung ist eine Schraubklemme nach Art einer Fahrstuhlklemme. Die Schraubklemme weist dabei einen Klemmrahmen mit einem Kopfsteg und einem Bodensteg, die einander gegenüberliegen, auf. Die Schraubklemme weist eine Schraube auf, die in einer Gewindebohrung des Kopfstegs schraubbar gelagert ist; diese Schraube wird auch als Klemmschraube bezeichnet. Die Schraubklemme weist außerdem ein Untersteckschutzteil, wie oben beschrieben, auf. Dabei umschließt das Untersteckschutzteil den Klemmrahmen, die Durchführöffnung des Untersteckschutzteils ist fluchtend zur Gewindebohrung angeordnet und die Abdeckschürze des Untersteckschutzteils überragt den Bodensteg in von dem Kopfsteg abgewandter Richtung.A further embodiment of the invention is a screw clamp in the manner of an elevator clamp. The screw terminal has a clamping frame with a head bar and a bottom bar, which lie opposite one another. The screw terminal has a screw which is screwably mounted in a threaded hole in the head web; this screw is also known as a clamping screw. The screw terminal also has an underplug protection part, as described above. The under-plug protection part encloses the clamping frame, the through opening of the under-plug protection part is arranged in alignment with the threaded hole and the cover skirt of the under-plug protection part projects beyond the base web in the direction away from the head web.
Gemäß einer bevorzugten Ausgestaltung der Schraubklemme trägt der Kopfsteg auf seiner dem Bodensteg abgewandten Außenseite einen Gewindeflansch, der die Gewindebohrung umschließt, wobei das erste Querelement des Untersteckschutzteils auf seiner dem zweiten Querelement zugewandten Seite entlang der Durchführöffnung eine Innenecke aufweist, an der der Gewindeflansch anliegt.According to a preferred embodiment of the screw terminal, the head web carries on its outside facing away from the base web a threaded flange which encloses the threaded hole, the first transverse element of the under-plug protection part having an inner corner along the feed-through opening on its side facing the second transverse element, against which the threaded flange rests.
Gemäß einer bevorzugten Ausgestaltung der Schraubklemme ist die Schraubklemme eine Doppelkammerklemme.According to a preferred embodiment of the screw terminal, the screw terminal is a double-chamber terminal.
Gemäß einer bevorzugten Ausgestaltung der Schraubklemme sitzt das Untersteckschutzteil so auf dem Klemmrahmen, dass die zwei Längselemente des Untersteckschutzteils Seitenteile des Klemmrahmens, die sich jeweils zwischen dem Kopfsteg und dem Bodensteg erstrecken, jeweils in ungefähr gleich große Anlageflächen unterteilen. Die Seitenteile des Klemmrahmens verbinden den Kopfsteg und den Bodensteg des Klemmrahmens an deren Enden jeweils miteinander, bilden also ebenso wie der Kopfsteg und der Bodensteg den Klemmrahmen. Die zwei Längselemente des Untersteckschutzteils verlaufen, bei einer Blickrichtung frontal auf die Seitenteile des Klemmrahmens, ungefähr entlang einer Linie, welche die Seitenteile des Klemmrahmens vom Kopfsteg und den Bodensteg halbiert. Entscheidend ist nicht, dass die Längselemente des Untersteckschutzteils exakt in der vertikalen Mittenlinie der Seitenteile des Klemmrahmens verlaufen, sondern dass die Seitenteile des Klemmrahmens anschließend an ihre Außenkanten jeweils eine Anlagefläche aufweisen. Es ist nämlich vorteilhaft, dass ein Schraubendrehmoment, welches durch das Drehen einer Schraube zum Verfahren des Klemmrahmens und des Druckstücks bewirkt wird, über die Anlageflächen des Klemmrahmens auf das Gehäuse des Installationsgeräts übertragen werden kann; andernfalls, d. h. falls dieses Schraubendrehmoment über die Längselemente des Untersteckschutzteils auf das Gehäuse des Installationsgeräts übertragen würde, besteht die Gefahr, dass die dadurch entstehende erhöhte Reibung zwischen dem Untersteckschutzteil und dem Gehäuse einen nachteiligen Effekt auf eine Bewegung der Schraubklemme hat. Durch die symmetrische Positionierung des Untersteckschutzteils auf dem Klemmrahmen werden ungefähr gleich große Anlageflächen auf den Außenseiten der Seitenteile des Klemmrahmens gebildet.According to a preferred embodiment of the screw terminal, the under-plug protection part sits on the clamping frame in such a way that the two longitudinal elements of the under-plug protection part divide side parts of the clamping frame, which each extend between the head web and the bottom web, into contact surfaces of approximately the same size. The side parts of the clamping frame connect the head bar and the bottom bar of the clamping frame to each other at their ends, thus forming the clamping frame just like the head bar and the bottom bar. When looking frontally at the side parts of the clamping frame, the two longitudinal elements of the base protection part run approximately along a line which bisects the side parts of the clamping frame from the head bar and the bottom bar. Decisive is not that the longitudinal elements of the under-plug protection part run exactly in the vertical center line of the side parts of the clamping frame, but that the side parts of the clamping frame each have a contact surface on their outer edges. It is advantageous that a screw torque, which is caused by turning a screw to move the clamping frame and the pressure piece, can be transferred to the housing of the installation device via the contact surfaces of the clamping frame; otherwise, ie if this screw torque were to be transferred to the housing of the installation device via the longitudinal elements of the under-plug protection part, there is a risk that the resulting increased friction between the under-plug protection part and the housing has a detrimental effect on movement of the screw terminal. Due to the symmetrical positioning of the under-plug protection part on the clamping frame, contact surfaces of approximately the same size are formed on the outside of the side parts of the clamping frame.
Eine weitere Ausgestaltung der Erfindung ist ein Installationsgerät mit einer Schraubklemme, wie oben beschrieben. Das Installationsgerät kann dabei in zwei Gehäusehälften unterteilt sein. Vor dem Zusammenstecken der beiden Gehäusehälften kann die Schraubklemme in eine der beiden Gehäusehälften eingelegt werden. Das Installationsgerät kann jedes Gerät sein, welches Schraubklemmen zur Aufnahme und Fixierung von Leiterenden von elektrischen Leitungen aufweist. Insbesondere kann das Installationsgerät ein Installationsschaltgerät wie ein Air Circuit Breaker, Arc Fault Detection Device, Arc Fault Circuit Interrupter, Circuit Breaker, Electronically Controlled Protection Device, Miniature Circuit Breaker, Moulded Case Circuit Breaker, Residual current operated Circuit-Breaker with Overcurrent protection, Residual Current Device, Residual Current Circuit Breaker oder Surge Protection Device sein.A further embodiment of the invention is an installation device with a screw terminal, as described above. The installation device can be divided into two housing halves. Before plugging the two housing halves together, the screw terminal can be inserted into one of the two housing halves. The installation device can be any device that has screw terminals for holding and fixing conductor ends of electrical cables. In particular, the installation device can be an installation switching device such as an Air Circuit Breaker, Arc Fault Detection Device, Arc Fault Circuit Interrupter, Circuit Breaker, Electronically Controlled Protection Device, Miniature Circuit Breaker, Molded Case Circuit Breaker, Residual current operated Circuit-Breaker with Overcurrent protection, Residual Current Device, Residual Current Circuit Breaker or Surge Protection Device.
Im Folgenden wird die Erfindung anhand mehrerer Ausführungsbeispiele unter Zuhilfenahme der beiliegenden Zeichnung erläutert. Es zeigt jeweils schematisch und nicht maßstabsgetreu
- Fig. 1
- eine Schrägansicht eines Untersteckschutzteils;
- Fig. 2
- eine Schrägansicht des in
Fig. 1 dargestellten Untersteckschutzteils, das auf einen Klemmrahmen einer Schraubklemme aufgeschoben ist; - Fig. 3
- zwei unterschiedliche Ansichten einer alternativen Variante des Untersteckschutzteils;
- Fig. 4
- zwei unterschiedliche Ansichten einer weiteren alternativen Variante des Untersteckschutzteils;
- Fig. 5
- eine Schraubklemme mit dem in
Fig. 3 gezeigten Untersteckschutzteil; - Fig. 6
- eine Seitenansicht der in
Fig. 5 gezeigten Schraubklemme, eingesetzt in eine Gehäuse-Halbschale eines Installationsgerätes; - Fig. 7
- eine Schnittansicht der in
Fig. 5 gezeigten Schraubklemme, eingesetzt in ein Installationsgerät; - Fig. 8
- eine Schrägansicht der in
Fig. 5 gezeigten Schraubklemme im offenen Zustand, eingesetzt in ein Installationsgerät; - Fig. 9
- eine Schrägansicht der in
Fig. 5 gezeigten Schraubklemme im geschlossenen Zustand, eingesetzt in ein Installationsgerät; - Fig. 10
- eine Seitenansicht der in
Fig. 5 gezeigten Schraubklemme, eingesetzt in eine Gehäuse-Halbschale eines Installationsgerätes mit einer Schieberhandbetätigung; - Fig. 11
- eine Schrägansicht der in
Fig. 5 gezeigten Schraubklemme im offenen Zustand, eingesetzt in ein Installationsgerät mit einer Schieberhandbetätigung; - Fig. 12
- eine Schrägansicht der in
Fig. 5 gezeigten Schraubklemme im geschlossenen Zustand, eingesetzt in ein Installationsgerät mit einer Schieberhandbetätigung; und - Fig. 13
- eine Seitenansicht eines Untersteckschutzteils.
- Fig. 1
- an oblique view of an underplug protection part;
- Fig. 2
- an oblique view of the in
Fig. 1 shown under-plug protection part, which is pushed onto a clamping frame of a screw terminal; - Fig. 3
- two different views of an alternative variant of the under-plug protection part;
- Fig. 4
- two different views of a further alternative variant of the under-plug protection part;
- Fig. 5
- a screw terminal with the in
Fig. 3 shown underplug protection part; - Fig. 6
- a side view of the in
Fig. 5 screw terminal shown, inserted into a housing half-shell of an installation device; - Fig. 7
- a sectional view of the in
Fig. 5 screw terminal shown, inserted into an installation device; - Fig. 8
- an oblique view of the in
Fig. 5 screw terminal shown in the open state, inserted into an installation device; - Fig. 9
- an oblique view of the in
Fig. 5 screw terminal shown in the closed state, inserted into an installation device; - Fig. 10
- a side view of the in
Fig. 5 screw terminal shown, inserted into a housing half-shell of an installation device with a slide manual actuation; - Fig. 11
- an oblique view of the in
Fig. 5 screw terminal shown in the open state, inserted into an installation device with a slide manual operation; - Fig. 12
- an oblique view of the in
Fig. 5 screw terminal shown in the closed state, inserted into an installation device with a slide manual operation; and - Fig. 13
- a side view of an underplug protection part.
Das Untersteckschutzteil 1 hat die Form eines in der x-y-Ebene liegenden geschlossenen Rahmens, der zwei in einem lichten Abstand l einander gegenüberliegende Längselemente L1, L2 in y-Richtung und ein erstes und ein zweites Querelement Q1, Q2 in x-Richtung aufweist. Gemäß der Orientierung des Untersteckschutzteils 1 kann das erste Querelement Q1 auch als oberes Querelement und das zweite Querelement Q2 auch als unteres Querelement bezeichnet werden. Dabei liegen die beiden Querelemente Q1, Q2 in einem lichten Abstand q einander gegenüber und verbinden die Längselemente L1, L2 an deren Enden jeweils miteinander.The under-
Die beiden Längselemente L1, L2 haben einen rechteckigen Querschnitt; dabei weisen sie zwei breitere Seitenflächen, deren Flächennormalen parallel zur x-Achse liegen, und zwei schmälere Seitenflächen, deren Flächennormalen parallel zur z-Achse liegen, auf.The two longitudinal elements L1, L2 have a rectangular cross section; They have two wider side surfaces, whose surface normals are parallel to the x-axis, and two narrower side surfaces whose surface normals are parallel to the z-axis.
Das erste Querelement Q1 bildet einen Ring 10, der eine kreisrunde Durchführöffnung A zum Durchführen eines Schraubenschafts umschließt. Das zweite Querelement Q2 hat einen rechteckigen Querschnitt, ähnlich den Längselementen L1, L2. Dabei ist an eine schmale Seitenfläche des zweiten Querelements Q2 ein Steg 14 angeformt, der eine als Untersteckschutz dienende Abdeckschürze S in Form eines quadratischen Plättchens trägt. Die Ebene des Stegs 14 liegt parallel zur x-z-Ebene, während die Ebene der Abdeckschürze S parallel zur x-y-Ebene liegt. Die Abdeckschürze S überragt das zweite Querelement Q2 in einer von dem ersten Querelement Q1 abgewandten Richtung.The first transverse element Q1 forms a
An einer nach unten weisenden Kante der Abdeckschürze S, d.h. an der gegen die y-Richtung zeigenden Kante, ist mittig eine Nase 15 angeformt, die gegen die y-Richtung von der Kante absteht und deren Funktion bei
An den beiden Rahmenecken des Untersteckschutzteils 1, die durch die Übergänge von den Längselementen L1, L2 zu dem zweiten Querelement Q2 gebildet werden, ist jeweils ein Federelement F in Form eines Füßchens angeformt. Die beiden Federelemente F haben jeweils die Form eines 90°-Bogens, wobei die beiden Bögen aufeinander zu weisen. Während die Ebene der Abdeckschürze S in der z-Richtung zu der Rahmenebene des Untersteckschutzteils 1 versetzt ist, sind die Federelemente F entgegen der z-Richtung zu der Rahmenebene des Untersteckschutzteils 1 versetzt. Falls das Untersteckschutzteil 1 entgegen der y-Richtung gegen eine feststehende Fläche bewegt wird, werden die Federelemente F eingebogen, was zu einer Federkraft in die y-Richtung führt.A spring element F in the form of a foot is formed on each of the two frame corners of the under-
Der Klemmrahmen 2 hat die Form eines in der x-y-Ebene liegenden geschlossenen Rahmens, der zwei einander gegenüberliegende Seitenteile 21, 22 in y-Richtung und einen Kopfsteg 23 und einen Bodensteg 24, jeweils in x-Richtung, aufweist. Dabei verbinden der Kopfsteg 23 und der Bodensteg 24 die Seitenteile 21, 22 an deren Enden jeweils miteinander.The
Die den Klemmrahmen bildenden Rahmenelemente, d. h. die beiden Seitenteile 21, 22, der Kopfsteg 23 und der Bodensteg 24, haben jeweils einen rechteckigen Querschnitt; dabei weisen diese Rahmenelemente jeweils zwei breitere Seitenflächen, deren Flächennormalen parallel zur x-y-Ebene liegen, und zwei schmälere Seitenflächen, deren Flächennormalen parallel zur z-Achse liegen, auf. In der Mitte des Kopfstegs 23 ist eine kreisrunde Gewindebohrung 26 zur Aufnahme einer Schraube angeordnet, deren Achse in der y-Richtung verläuft. Außerdem trägt der Kopfsteg 23 auf seiner dem Bodensteg 24 abgewandten Außenseite einen Gewindeflansch 25, der die Gewindebohrung 26 umschließt. Die dem Kopfsteg 23 zugewandte Oberfläche des Bodenstegs 24 ist als eine profilierte Oberfläche 27 in Form von Rippen ausgebildet; in das Profil 27 des vorzugsweise aus einem relativ harten Metall wie Eisen oder Stahl bestehenden Bodenstegs 24 kann ein Ende einer Leitung, welche in der Regel einen Leiter (Massivdraht oder Litzen) aus einem relativ weichen Metall wie Kupfer oder Aluminium aufweist, durch den Anpressdruck einer in der Gewindebohrung 26 schraubbar gelagerten Schraube eingepresst werden, so dass der Leiter dort besonders sicher geklemmt werden kann (Kraftschluss + Formschluss) .The frame elements forming the clamping frame, ie the two
Das Untersteckschutzteil 1 umschließt den Klemmrahmen 2 auf seinem gesamten Außenumfang, wobei die Durchführöffnung A des Untersteckschutzteils 1 fluchtend zur Gewindebohrung 26 des Klemmrahmens 2 angeordnet ist und die Abdeckschürze S des Untersteckschutzteils 1 den Bodensteg 24 in einer von dem Kopfsteg 23 abgewandten Richtung überragt. Dabei weist das erste Querelement Q1 des Untersteckschutzteils 1 auf seiner dem zweiten Querelement Q2 zugewandten Seite entlang der Durchführöffnung A eine Innenecke auf, an der der Gewindeflansch 25 des Klemmrahmens 2 anliegt.The under-
In
Die Schraube 30 weist einen Schraubenkopf mit einem Kreuzschlitz zum Ansetzen eines entsprechenden Schraubendrehers sowie einen an den Schraubenkopf anschließenden Gewindekörper auf, wobei die Schraube von oben her in eine Gewindebohrung des Klemmrahmens 2, wie in
Um den Schraubenkopf der Schraube 30 herum liegt ein Kopfblech des Druckstücks 40, so dass eine Axialbewegung der Schraube eine entsprechende Bewegung des Druckstücks generiert.A head plate of the
Das Druckstück 40 kann aus verzinntem Stahl, der Klemmrahmen 2 aus verkupfertem Stahl, der Umgreifschutz 42 aus Kunststoff, das Untersteckschutzteil 1 aus Kunststoff und die Schraube 30 aus Stahl gefertigt sein. Diese Materialangaben sind nur beispielhaft, aber nicht einschränkend. Die Teile können auch aus anderen geeigneten Materialien bestehen.The
Die nach unten weisende Nase 15, die mittig an der nach unten weisenden Kante der Abdeckschürze S angeformt ist, bewirkt, dass die Abdeckschürze S in jeglicher Teiletoleranzsituation nicht aus der unteren Leitereinführöffnung 67 ausfädelt. Zur Erzielung dieser Wirkung könnte alternativ auch die gesamte Unterkante der Abdeckschürze S bis zur Unterkante der Nase 15 verlängert werden, was mehr Material erfordern würde, als wenn nur die mittig angeordnete Nase 15 ausgebildet wird. Aber eine materialaufwändige Verlängerung der gesamten Abdeckschürze S ist nicht nötig, da die Abdeckschürze S die untere Leitereinführöffnung 67 nicht hermetisch abschließen muss, sondern lediglich verhindern muss, dass ein Leiter, welcher ja immer eine gewisse Mindestdicke hat, in die unteren Leitereinführöffnung 67 eingesteckt wird. Somit wird die Auskragung der Nase 15 nach unten über die Unterkante der Abdeckschürze S ungefähr so groß gewählt, wie ein minimaler Durchmesser eines Leiterendes. Durch eine Ausbildung des Führungselements und Ausfädelschutzes als Nase 15 wird somit Material eingespart.The downward-pointing
Wenn die untere Leitereinführöffnung 67 vollständig geschlossen ist, wie in
Die Abdeckschürze S ist so am Untersteckschutzteil 1 positioniert, dass die Unterkante S1, d. h. die vom ersten Querelement Q1 abgewandte Seitenkante der Abdeckschürze S, die Unterkante 24UK des Bodenstegs 24, d. h. die vom Kopfsteg 23 abgewandte Seite des Bodenstegs 24, in einer vom Kopfsteg 23 abgewandten Richtung, d. h. entgegen der y-Richtung, um eine Unterragungslänge b unterragt. Dabei ist die Unterragungslänge b so gewählt, dass die Abdeckschürze S ein Unterstecken einer Klemmkammer einer Schraubklemme in allen möglichen Positionen des Klemmrahmen 2 verhindert.The cover apron S is positioned on the under-
Das in
Das Untersteckschutzteil 1 ist so ausgebildet, dass seine Längselemente L1, L2 sich ungefähr in der Mitte der Seitenteile 21, 22 des Klemmrahmens 2 befinden, auf den Untersteckschutzteil 1 aufgesteckt ist; d. h. die Längselemente L1, L2 unterteilen, in einer Ansicht des Klemmrahmens 2 entgegen der x-Richtung, die Seitenteile 21, 22 des Klemmrahmens 2 in ungefähr gleich große Anlageflächen, nämlich eine vordere Anlagefläche C1 und eine hintere Anlagefläche C2. In diesen Anlageflächen C1, C2 stützt der Klemmrahmen 2 das Schraubenanzugsmoment, das in einem relativ hohen Wertebereich, z. B. bei 3,5 Nm, liegen kann, im Gehäuse 60 ab. im Fall einer nicht-mittigen Positionierung des Untersteckschutzteils 1 auf dem Klemmrahmen 2 könnte nämlich der Fall eintreten, dass das Schraubenanzugsmoment sich über das Untersteckschutzteil 1 abstützt, was sehr nachteilig wäre und zu Problemen führen könnte. Durch die mittige Positionierung des Untersteckschutzteils 1 auf dem Klemmrahmen 2 ist der Steg 14 notwendig, um die Abdeckschürze S an dem zweiten Querelement Q2 des Untersteckschutzteils 1 zu befestigen.The under-
Claims (12)
wobei
where
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102022205610.8A DE102022205610A1 (en) | 2022-06-01 | 2022-06-01 | Under-plug protection part |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4287411A1 true EP4287411A1 (en) | 2023-12-06 |
Family
ID=86052395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP23168008.3A Pending EP4287411A1 (en) | 2022-06-01 | 2023-04-14 | Underplug protection part |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4287411A1 (en) |
CN (1) | CN117154429A (en) |
DE (1) | DE102022205610A1 (en) |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1935560U (en) | 1964-02-21 | 1966-03-31 | Georg Schlegel Elektrotechnisc | CONNECTION TERMINAL FOR ONE OR MORE ELECTRICAL CONDUCTORS. |
DE1802558A1 (en) | 1967-11-13 | 1969-08-14 | Woertz Fa | Electrical clamp |
DE8134378U1 (en) | 1981-11-25 | 1982-02-25 | Siemens AG, 1000 Berlin und 8000 München | Electromagnetic switching device |
DE3314919A1 (en) | 1983-04-25 | 1984-10-25 | Murr-Elektronik Gmbh, 7155 Oppenweiler | Screw connecting terminal |
FR2601513A1 (en) * | 1986-07-09 | 1988-01-15 | Alsthom Cgee | Protected connection terminal |
EP0735614A2 (en) | 1995-04-01 | 1996-10-02 | Weidmüller Interface GmbH & Co. | Electrical connector with a clamping screw |
US6172586B1 (en) * | 1999-11-05 | 2001-01-09 | Siemens Energy & Automation Inc. | Terminal barrier system for molded case circuit breaker |
DE10018352C1 (en) | 2000-04-13 | 2001-09-27 | Siemens Ag | Clamp arrangement with housing for automatic cut-out or fault- current (FI) circuit-breaker circuit |
KR20060068576A (en) * | 2004-12-16 | 2006-06-21 | 엘에스산전 주식회사 | The apparatus for joining the box terminal to the circuit breaker |
DE102016122852A1 (en) | 2016-11-28 | 2018-05-30 | Abb Schweiz Ag | Installation switching device with contact terminal |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2740911B1 (en) | 1995-11-03 | 1998-01-16 | Legrand Sa | ELECTRICAL APPARATUS WITH CONNECTION TERMINALS PROTECTED BY A DIAPHRAGM FIXED BY WINGS |
DE102009049709A1 (en) | 2009-10-17 | 2011-04-21 | Abb Ag | Screw terminal with cover and service switching device |
-
2022
- 2022-06-01 DE DE102022205610.8A patent/DE102022205610A1/en active Pending
-
2023
- 2023-04-14 EP EP23168008.3A patent/EP4287411A1/en active Pending
- 2023-05-29 CN CN202310614700.9A patent/CN117154429A/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1935560U (en) | 1964-02-21 | 1966-03-31 | Georg Schlegel Elektrotechnisc | CONNECTION TERMINAL FOR ONE OR MORE ELECTRICAL CONDUCTORS. |
DE1802558A1 (en) | 1967-11-13 | 1969-08-14 | Woertz Fa | Electrical clamp |
DE8134378U1 (en) | 1981-11-25 | 1982-02-25 | Siemens AG, 1000 Berlin und 8000 München | Electromagnetic switching device |
DE3314919A1 (en) | 1983-04-25 | 1984-10-25 | Murr-Elektronik Gmbh, 7155 Oppenweiler | Screw connecting terminal |
FR2601513A1 (en) * | 1986-07-09 | 1988-01-15 | Alsthom Cgee | Protected connection terminal |
EP0735614A2 (en) | 1995-04-01 | 1996-10-02 | Weidmüller Interface GmbH & Co. | Electrical connector with a clamping screw |
US6172586B1 (en) * | 1999-11-05 | 2001-01-09 | Siemens Energy & Automation Inc. | Terminal barrier system for molded case circuit breaker |
DE10018352C1 (en) | 2000-04-13 | 2001-09-27 | Siemens Ag | Clamp arrangement with housing for automatic cut-out or fault- current (FI) circuit-breaker circuit |
KR20060068576A (en) * | 2004-12-16 | 2006-06-21 | 엘에스산전 주식회사 | The apparatus for joining the box terminal to the circuit breaker |
DE102016122852A1 (en) | 2016-11-28 | 2018-05-30 | Abb Schweiz Ag | Installation switching device with contact terminal |
US10340097B2 (en) * | 2016-11-28 | 2019-07-02 | Abb Schweiz Ag | Installation switching device having a contact clamp |
Also Published As
Publication number | Publication date |
---|---|
CN117154429A (en) | 2023-12-01 |
DE102022205610A1 (en) | 2023-12-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3627625B1 (en) | Connecting terminal | |
EP2070161B1 (en) | Installation switching device | |
EP1916740B1 (en) | Installation switching device and connecting terminal for an installation switching device | |
EP3685471B1 (en) | High-current connector comprising an insulating bush | |
EP1949501A1 (en) | Switchgear | |
DE102006026064B4 (en) | Electrical switching arrangement and assembly method | |
EP1881752A1 (en) | Housing for electrical components | |
WO2013000804A1 (en) | Surge protector | |
EP1913619A1 (en) | Switch pole with supporting frame having latching means | |
DE102005058307A1 (en) | Electrical connector clamp with a cylindrical actuator having an external thread arranged on the clamp arm | |
EP3849019B1 (en) | Conductor connecting terminal | |
EP4287411A1 (en) | Underplug protection part | |
EP2489100B1 (en) | Clamping screw with cover and installation switching device | |
DE69312202T2 (en) | Terminal for electrical devices | |
EP0059939A1 (en) | Terminal for the connection of electrical conductors | |
EP1703607B1 (en) | Mounting claw for fixation of antenna socket outlet | |
EP2437354A1 (en) | Low voltage switching device with a connection clamp assembly | |
DE102019120306B4 (en) | Conductor connection terminal for connecting at least one electrical conductor | |
EP1909359A2 (en) | Terminal clamp, connecting terminal assembly and installation switching device | |
EP0336251B1 (en) | Clamping screw | |
DE19846196A1 (en) | Connector for vehicle battery has pole clamp for connecting current rail to pole pin with end section with opening for pole pin, sprung center section, contact rail at angle to center section | |
EP1344234B1 (en) | Connector rail made of profiled semifinished products for electrical devices and appliances for various nominal currents | |
DE102020109420A1 (en) | ARRANGEMENT WITH TWO ELECTRIC LADDERS CLAMPED EACH OTHER AND METHOD OF CLAMPING TWO ELECTRIC LADDERS EACH OTHER | |
EP1028488B1 (en) | Connecting terminal for an electrical apparatus | |
EP0141086B1 (en) | Clamping connection member for low-voltage systems, especially for interrupters |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20240603 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |