DE102017116722B3 - CLAMP AND METHOD FOR ELECTRICALLY CONTACTING A PROTECTOR - Google Patents

Abstract

The present invention relates to a tensioning clamp (300) for electrically contacting a contactor (100), wherein the tensioning clamp (300) has a carrier slidable on a busbar (400) with a wedge structure and a carrier slot for receiving a screw (200) and a relative to the carrier in a wedge direction of the wedge structure between a transport position and a clamping position movable sliding element having a in the clamping position substantially to the carrier slot congruent slot, wherein the sliding element rests in the transport position on the carrier next to the wedge structure and rests in the clamping position on the wedge structure wherein the wedge structure defines a span distance between the carrier and the slide member. Furthermore, the invention relates to a method for electrically contacting a contactor (100).

Description

Technical area

The present invention relates to a clamp for electrically contacting a contactor and a method for electrically contacting a contactor.

State of the art

The present invention will be described below mainly in connection with switching elements (contactors) for vehicle electrical systems. However, the invention can be used in any application in which electrical loads are switched.

A busbar can be connected by a screw with a terminal of a contactor. The screw connection generates a necessary contact force in order to be able to transfer electrical current with little loss between the busbar and the terminal.

DE 11 2014 002 786 T5 discloses a mounting structure for a control board to a metal housing of a power control unit (hereinafter called PCU). A PCU is arranged directly on a vehicle-side transmission. A mounting structure for mounting a control board to a PCU housing includes a nut disposed on an inner surface of the PCU housing and having an internal thread disposed therein; a bolt disposed in a mounting hole in the control board and bolted to the nut; and a disc made of a viscoelastic material and located between a head of the bolt and the control board, the bolt having an externally threaded portion in threaded connection with the internal thread, an intermediate portion and a head.

JP H02-62 109 U and JP S51-37362 A show screws as fasteners.

Description of the invention

An object of the invention is therefore to provide an alternative connection method to the screw with the use of structurally simplest possible means.

The object is solved by the subject matters of the independent claims. Advantageous developments of the invention are specified in the dependent claims, the description and the accompanying figures. In particular, the independent claims of a claim category can also be developed analogously to the dependent claims of another claim category.

• • einen auf eine Stromschiene aufschiebbaren Träger mit einer Keilstruktur und einem Trägerschlitz zum Aufnehmen einer Schraube; und
• • ein relativ zu dem Träger in einer Keilrichtung der Keilstruktur zwischen einer Transportposition und einer Spannposition bewegliches Schiebeelement mit einem in der Spannposition im Wesentlichen zu dem Trägerschlitz deckungsgleichen Schlitz, wobei das Schiebeelement in der Transportposition auf dem Träger neben der Keilstruktur aufliegt und in der Spannstellung auf der Keilstruktur aufliegt, wobei die Keilstruktur einen Spannabstand zwischen dem Träger und dem Schiebeelement definiert.

A clamp for electrically contacting a contactor is presented, the clamp having the following features:

• A carrier slidable on a bus bar with a wedge structure and a carrier slot for receiving a screw; and
• • a relative to the carrier in a wedge direction of the wedge structure between a transport position and a clamping position movable sliding element with a clamping position substantially to the carrier slot congruent slot, wherein the sliding element rests in the transport position on the carrier next to the wedge structure and in the clamping position the wedge structure rests, wherein the wedge structure defines a clamping distance between the carrier and the sliding element.

• • einen Schaft mit einem Gewinde zum Einschrauben in ein in einer Kontaktfläche des Schützes angeordnetes Innengewinde des Schützes;
• • einen an den Schaft anschließenden Schraubenkopf mit einer quer zu dem Schaft ausgerichteten Anlagefläche; und
• • einen Abstandhalter zum Definieren eines Abstands zwischen der Anlagefläche und der Kontaktfläche.

The screw for electrically contacting the contactor has the following features:

• • a shaft with a thread for screwing into a arranged in a contact surface of the contactor internal thread of the contactor;
• A bolt head adjoining the shaft with a contact surface aligned transversely to the shaft; and
• • a spacer for defining a distance between the contact surface and the contact surface.

1. a) Einschrauben einer Schraube gemäß dem hier vorgestellten Ansatz in das Innengewinde des Schützes, bis der Abstandhalter den Abstand zwischen der Kontaktfläche und der Anlagefläche des Schraubenkopfs definiert;
2. b) Aufschieben einer Spannklammer gemäß dem hier vorgestellten Ansatz auf die Stromschiene, bis der Trägerschlitz des Trägers der Spannklammer an einem Aufnahmeschlitz der Stromschiene ausgerichtet ist;
3. c) Einführen der Schraube in den Aufnahmeschlitz, sodass die Stromschiene an der Kontaktfläche anliegt und die Spannklammer zwischen der Anlagefläche der Schraube und der Stromschiene angeordnet ist; und
4. d) Bewegen des Schiebeelements aus der Transportposition in die Spannposition, um die Stromschiene auf die Kontaktfläche zu pressen.

Furthermore, a method for electrically contacting a contactor with a busbar is presented, the method comprising the following steps:

1. a) screwing a screw in accordance with the approach presented here in the internal thread of the contactor until the spacer defines the distance between the contact surface and the contact surface of the screw head;
2. b) sliding a clamp according to the approach presented here on the busbar until the carrier slot of the carrier of the clamp is aligned with a receiving slot of the busbar;
3. c) inserting the screw in the receiving slot, so that the busbar bears against the contact surface and the clamping clip between the contact surface of the screw and the busbar is arranged; and
4. d) moving the sliding element from the transport position to the clamping position to press the bus bar on the contact surface.

Under a contactor, a switch or switching element for high voltage and / or high electrical current flows are understood. The contactor can have known dimensions. The thread can be adapted to a thread standard of the internal thread of the contactor. The contact surface of the screw head may be aligned substantially perpendicular to the shaft. The screw head may have a receptacle for a screwing tool. There are also external thread in the form of studs conceivable, the screw heads are then represented by nuts. The recording can be carried out according to a tool standard. A diameter of the shaft or the spacer may determine a width of the receiving slot of the carrier, the carrier slot of the busbar and the slot of the sliding element. The carrier slot, the slot, and the receiving slot may be referred to as the slots. The slots can be U-shaped. At a slot bottom, the slots can be as wide as the screw. The slots may have V-shaped tapered edges. The slots can become narrower to the bottom. The wedge structure can be embossed in the carrier. The wedge structure may comprise a plurality of individual, similar wedge elements. The wedge elements can be distributed over the carrier. The sliding element can be resilient.

When screwing in the screws, the screws can be screwed in with torque monitoring so that the screws do not loosen. The clamp can be pushed in the mounting direction to a defined by a positive connection to the busbar layer on the busbars. The screws can be guided in the mounting direction when inserted into the slots by mounting points of the contactor. The busbar may also be spaced from the contact surface by a gap. By moving the sliding element on the wedge structure creates a gap between the carrier and the sliding element. For the clamp is thicker and the gap between the sliding element and the contact surface, the carrier and the busbar and the busbar and the contact surface disappear. When all parts abut each other, the parts are braced against each other.

The spacer may be formed as a shoulder on the shank between the abutment surface and the thread. The approach may have a larger diameter than the thread. One approach may be a non-threaded cylindrical shaft portion. The approach can be easily and precisely made.

The spacer may also be formed as a sleeve arranged on the shaft between the contact surface and the thread. The sleeve or an inner diameter of the sleeve may have a larger diameter than the thread. A sleeve may be a hollow cylindrical tube. The screw can be a standard screw. The sleeve may be glued or otherwise connected to the shaft.

The distance can be defined by a material thickness of a bus bar to be contacted, a thickness of a clamp clip which can be pushed onto the bus bar in a transport position and a desired gap dimension between the contact surface, the clamp and the bus bar. In order to have a desired current carrying capacity, the busbar may have a material thickness between two millimeters and six millimeters, in particular between three millimeters and five millimeters. For example, the busbar can be four millimeters thick. The thickness of the clamping clip results from a material thickness of the carrier and a material thickness of the sliding element. The gap results from manufacturing tolerances. The more precise the production runs, the lower the gap can be.

The carrier may have a fastening device for latching to a contact contour of the busbar. The fastening device can be designed to align the carrier slot of the carrier with a corresponding receiving slot of the contact contour. The fastening device can be designed latching. The fastening device may comprise brackets for gripping around the busbar. The fastening device can produce a positive connection to the busbar.

The carrier may comprise a spring-loaded latching device for latching on the sliding element. The latching device can engage when the sliding element is arranged in the clamping position. The latching device can be designed as a leaf spring. The leaf spring may be stamped out of the carrier and bent. By means of the latching device, the sliding element can no longer be moved back into the transport position without actively moving and overcoming a latching force, for example spring force.

The carrier may have a transport lock for holding the sliding element in the transport position. The transport lock can temporarily hold the sliding element until it is used for clamping. The transport lock can release the sliding element when it is moved out of the transport position.

list of figures

• 1 eine Darstellung eines Schützes;
• 2 eine Darstellung einer Schraube gemäß einem Ausführungsbeispiel;
• 3 eine Darstellung einer Spannklammer gemäß einem Ausführungsbeispiel;
• 4 eine Darstellung einer Stromschiene mit einer Kontaktkontur gemäß einem Ausführungsbeispiel;
• 5 eine Darstellung eines Schützes mit in einen Aufnahmeschlitz eingeführten Schrauben gemäß einem Ausführungsbeispiel;
• 6 eine Darstellung eines unter Verwendung von Spannklammern gemäß einem Ausführungsbeispiel elektrisch kontaktierten Schützes; und
• die 7 und 8 Darstellungen eines Werkzeugs zum Kontaktieren gemäß einem Ausführungsbeispiel.

Hereinafter, an advantageous embodiment of the invention will be explained with reference to the accompanying figures. Show it:

• 1 a representation of a contactor;
• 2 an illustration of a screw according to an embodiment;
• 3 an illustration of a clamping clip according to an embodiment;
• 4 a representation of a busbar with a contact contour according to an embodiment;
• 5 an illustration of a contactor with inserted into a receiving slot screws according to an embodiment;
• 6 an illustration of a contact using electrically clamped according to an embodiment contactor; and
• the 7 and 8th Representations of a tool for contacting according to an embodiment.

The figures are merely schematic representations and serve only to illustrate the invention. Identical or equivalent elements are consistently provided with the same reference numerals.

Detailed description

For ease of understanding, reference numerals will be used in the following description 1-6 retained as a reference.

1 shows a representation of a conventional contactor 100 , The contactor 100 is a switch for switching electrical voltages in the high-voltage range. The contactor 100 is loadable with high current flows. To the high current flows through the contactor 100 with low loss, the contactor has two large contact surfaces 102 or terminals on. The contact surfaces 102 are round here and have a central internal thread 104 on. The contact surfaces 102 are on a side surface of the contactor 100 arranged side by side. Between the contact surfaces 102 is an electrically insulating rib 106 arranged to allow required clearance and creepage distances between the contact surfaces 102 observed.

Conventionally, when contacting the contactor 100 two electrical conductors with a large cross-section, such as busbars, by conventional, in the internal thread 104 screwed screws on the contact surfaces 102 pressed. The screws are tightened with a defined torque to ensure a required contact force.

The contactor 100 has two attachment points 108 on. At the attachment points 108 becomes the contactor 100 bolted to a supporting structure. The attachment points 108 have mounting holes that are transverse to the internal threads 104 are aligned. The orientation of the mounting holes determines a mounting direction of the contactor 100 , The internal thread 104 are thus aligned transversely to the mounting direction and can in the assembled state of the contactor 100 difficult to reach. In particular, for monitoring and documenting the applied torque but accessibility with a torque tool may be required.

The contactor 100 can be used for example in a switchgear box. Switchgear boxes accommodate a variety of electrical components that need to be electrically connected. In switchgear boxes are, for example, contactors 100 , Busbars, fuses and resistors arranged. An example of a switchgear box is a battery distributor or "Battery Junction Box" (BJB). For high-current connections busbars made of copper or aluminum sheet have proven. The different geometries of the components result in each case different mounting and screwing directions. The large number of individual parts and the narrowness of the installation space make automated assembly difficult.

So far, the busbars to the shooters 100 screwed with double combi screws, consisting of screw, clamping washer and washer. The contact resistance depends on the contact force and therefore on the tightening torque. Therefore, these fittings are tightened with a torque monitor.

In the following figures, a clip solution for contacting the contactor 100 presented.

This eliminates unwanted metallic small parts during final assembly. Without the small parts nothing can fall down and lead to a short circuit. In addition, the mounting direction is standardized for simplified installation.

The busbars are connected to the contactor 100 to be contacted ends equipped with brackets that lead in a linear motion via a wedge effect for contacting with a defined contact force.

This leads to a simplified pre-assembly with a reduced pre-assembly, further to an automation of the assembly and to an acceleration of the assembly. The achievable contact forces no longer depend directly on the tightening torque of the screws. The screws do not have to be tightened so much, which is advantageous in the restricted thread depth of shooters

2 shows a representation of a screw 200 according to an embodiment. The screw 200 is for contacting a contactor, as in 1 is shown formed. This is the screw 200 screwed into the internal thread of a contact surface of the contactor and tightened before mounting the contactor. In the approach presented here, a working direction when contacting the contactor of the mounting direction of the contactor is adjusted. This is indicated by the screw 200 a spacer 202 on, in the screwed state of the screw 200 a defined distance 204 between the respective contact surface and a contact surface 206 a screw head 208 the screw 200 ensures. Here is the spacer 202 as integral with a shaft 210 the screw 200 connected approach 212 executed. The approach 212 is cylindrical and has a larger diameter than a thread 214 the screw 200 on. The approach 212 This forms a stop surface, which when screwing the screw 200 strikes in the internal thread on the contact surface and is clamped against the contact surface.

The contactor comes with two screws 200 with a defined approach 212 preassembled. The cylindrical approach 212 has the purpose of an exact distance of the screw head 208 to ensure the contact surface of the contactor.

In one embodiment, the screw 200 as a spacer 202 one on the shaft 210 deferred sleeve 216 on. The sleeve 216 is designed as a hollow cylinder and strikes in the screwed state of the screw 200 at the contact surface 206 and the contact surface.

A length of the neck 212 or the sleeve 216 is dependent on a bridging material thickness of a busbar to be contacted and a thickness of a slidable on the busbar clamp according to an embodiment, as shown in 3 is shown, and a desired gap between the contact surface 206 , the clamp and the busbar.

3 shows a representation of a clamp 300 according to an embodiment. The clamp 300 is designed to work in conjunction with a screw, such as in 2 is shown, a busbar electrically conductive with a contactor, such as in 1 is shown to connect. These are the busbar and the clamp 300 arranged between the contact surface and the contact surface of the screw head. So that the busbar and the clamp 300 can be arranged between the contact surface and contact surface, gaps between the partners of the connection are required. The clamp 300 is designed to close the gap and brace the connection.

The clamp 300 has a carrier 302 and a sliding element 304 on. The carrier 302 is a stamped and bent part made of a thin sheet metal. The sliding element 304 is a stamped bent part made of a thicker sheet metal. The carrier 302 is adapted to be slid onto the bus bar and abut against a flat surface of the bus bar. The carrier 302 has an investment area 306 to the abutment on the surface of the busbar and one in the contact area 306 embossed wedge structure 308 on. The sliding element 304 is designed to be applied to the contact surface of the screw head. When the sliding element 304 in a wedge direction on the wedge structure 308 is moved up, it is from a transport position shown here 310 moved to a clamping position, not shown here. Before the sliding element reaches the clamping position, it rests against the contact surface. The wedge direction is about a wedge angle of the wedge structure 308 oblique to a plane of the carrier 302 hired. In the transport position 310 is the sliding element 304 on the investment area 306 on. In the clamping position is the sliding element 304 spaced by a stroke to the contact area 306 ,

The carrier 302 and has a carrier slot 312 on. The sliding element 304 has a slot 314 on. The carrier slot 312 and the slot 314 are essentially the same shape. Both are U-shaped and adapted to receive the shaft of the screw and partially enclose. When the sliding element 304 is arranged in the clamping position, the slot 314 approximately to the carrier slot 312 congruent.

In the clamping position is thus a thickness of the clamp 300 greater than in the transport position 310 , Between the transport position 310 and the clamping position guides the sliding element 304 effectively the stroke perpendicular to the investment area 306 or towards the wearer 302 out. The stroke depends on an embossing depth of the wedge structure 308 , The stroke causes gaps between the contact surface of the screw head and the sliding element 304 , the carrier 302 and the busbar and the busbar and the contact surface the contactor closed. From the point where the gaps are closed and all of the connection partners in the connection abut each other, the screw is stressed while the clamp 300 and bus bar are subjected to compression. All partners are elastically deformed. In particular, the sliding element 304 thereby elastically deformed. The more the partners deform, the greater is the preload force of the connection. The one through the wedge structure 308 defined stroke thus determines the through the clamp 300 achievable in the clamping position biasing force. The sliding element 304 serves as a spring storage for the preload force and can compensate for movements and thermal expansions of the partners.

The wedge structure 306 here consists of four in the carrier 302 embossed beads on from a low end in the transport position 310 rise to a high end in the area of the clamping position in the wedge direction. The beads are symmetrical to the slot 312 of the carrier 302 arranged.

The carrier 302 also has a fastening device 316 for locking on the busbar. The fastening device 316 has four spring clips 318 on, which are adapted to embrace an edge region of the busbar. At least two of the clips 318 be elastically bent during sliding onto a contact contour of the busbar and spring back on reaching a designated position behind locking lugs of the contact contour.

The carrier 302 also has a latching device 320 on. The locking device 320 is here as one from the investment area 306 formed out bent spring element. The spring element is when moving the sliding element 304 from the transport position 310 elastically bent in the clamping position or in the wedge direction and springs back into a starting position when the sliding element 304 over the locking device 320 has been moved away.

The carrier 302 still has a transport lock 322 on, which is adapted to the sliding element 304 in the transport position 310 to hold up the sliding element 304 is actively moved in the wedge direction. The transport security 322 has two brackets, which form a border area of the sliding element 304 grip around and the sliding element 304 hold sideways. In addition, a movement of the sliding element 304 prevented by another spring element against the wedge direction.

4 shows a representation of a busbar 400 with a contact contour 402 according to an embodiment. The contact contour 402 is designed to be a clamp, as for example in 3 is shown to record. The contact contour 402 is further adapted to a screw, as in 2 is shown to record. This is indicated by the contact contour 402 a substantially U-shaped receiving slot 404 , two slip-on slants 406 , two locking lugs 408 and two wells 410 on. The receiving slot 404 is aligned in a mounting direction for a contactor. When the contactor is mounted with the screw screwed in, the screw will be in the receiving slot 404 arranged.

The ends of the busbars 400 get in a punching a bifurcated contour. On these ends of sheet metal clips are pushed, which lock on it.

If brackets of a fastening device of the clamp in the mounting direction on the Aufschiebeschrägen 406 they are bent open, so they over the locking lugs 408 can slip. Behind the detents 408 the clips spring back and lie in the recesses 410 at the power rail 400 at. So the clamp is safe on the power rail 400 attached.

5 shows a representation of a contactor 100 with in busbars 400 inserted screws 200 according to an embodiment. The busbars 400 correspond essentially to the illustration in 4 , The contactor 100 essentially corresponds to the contactor in 1 , The screws 200 essentially correspond to the screw in 2 , At the power rails 400 are clamps as in 3 arranged. The contact surfaces of the contactor 100 lie on the busbars 400 at. The rib of the contactor 100 is placed between the bills. The receiving slots of the busbars 400 are essentially congruent with the carrier slots of the clamps 300 , The clamps 300 are in a transport position 310 arranged. So that's the screw heads of the screws 200 spaced from sliding elements of the clamping brackets 300 ,

The contactor 100 gets on the bifurcated ends of the busbars 400 pushed on and fastened with two other screws. Now the two clamps are pushed upwards with the help of a tool, causing them to move over a wedge between the screw head and the busbar 400 terminals. Thus, a defined clamping force is generated. At the end of the lifting movement, this clip locks on a latching lug, thereby preventing unintentional release.

6 shows a representation of one using clamps 300 according to an embodiment electrically contacted contactor 100 , The presentation essentially corresponds to the representation in 5 , In contrast, the sliding elements of the clamps 300 in the clamping positions 600 arranged. These are the sliding elements in the wedge direction on the wedge structures and under the screw heads of the screws 200 been pushed. Thus, the wedge structures of the clamps 300 arranged between the sliding elements and the carriers and the sliding elements abut contact surfaces of the screw heads. The clamps are therefore thicker than in 5 , The sliding elements are elastically deformed by the contact pressure, for pressing the busbars 400 to the contact surfaces of the contactor. The elastic deformation allows the sliding elements to compensate for tolerances and thermal expansions.

7 and 8th show representations of a tool 700 according to an embodiment. The tool 700 is designed to have two sliding elements 304 two clamps 300, as in 3 are shown, simultaneously from a transport position 310 in a clamping position 600 to move. The two clamps 300 are here as in 5 on two power rails, as in 4 are shown, postponed. In the slots of the busbars and clamps 300 are two screws 200 as they are in 2 are shown arranged. The screws 200 are in internal thread of a contactor 100 as he is in 1 is shown screwed.

The tool 700 is in two parts. A tool shell 702 has support surfaces for support on the screw heads 208 the screws on. Between the support surfaces is a recess for the rib of the contactor 100 arranged. The tool shell 702 defines a position of the entire tool over the support surfaces 700 ,

A tool base 704 of the tool 700 is relative to the tool top 702 movable. The lower part of the tool 704 surrounds the sliding elements 304 and pull the sliding elements 304 in the wedge direction on the wedge structure and under the screw heads 208. Since the upper tool 702 during the clamping movement of the lower tool part 704 against the screw heads 208 supported, the power flow is closed here on short ways and thus there are no radial loads on the screws.

Since the apparatus and methods described above are exemplary embodiments, they may be modified in a conventional manner to a wide extent by those skilled in the art without departing from the scope of the invention. In particular, the mechanical arrangements and the size ratios of the individual elements to each other are merely exemplary

LIST OF REFERENCE NUMBERS

100

contactor

102

contact area

104

inner thread

106

rib

108

attachment point

200

screw

202

spacer

204

distance

206

contact surface

208

screw head

210

shaft

212

approach

214

thread

216

shell

300

clamp

302

carrier

304

sliding element

306

plant area

308

wedge structure

310

transport position

312

carrier slot

314

slot

316

fastening device

318

clinch

320

locking device

322

transport safety

400

conductor rail

402

Contact outline

404

receiving slot

406

chamfered edge

408

locking lug

410

deepening

600

clamping position

700

Tool

702

Upper die

704

Tool part

Claims (8)

A tensioning clamp (300) for electrically contacting a contactor (100), wherein the tensioning clamp (300) has the following features: a carrier (302) slidable on a bus bar (400), having a wedge structure (308) and a carrier slot (312) for receiving a screw (200), the screw (200) a shaft (210) having a thread (214) for screwing into a in an contact surface (102) of the contactor (100) arranged inside thread (104) of the contactor (100); a screw head (208) adjoining the shaft (210) with a contact surface (206) aligned transversely to the shaft (210); and a spacer (202) for defining a spacing (204) between the abutment surface (206) and the contact surface (102); and a sliding member (304) movable relative to the carrier (302) in a wedge direction of the wedge structure (308) between a transport position (310) and a clamping position (600) with a substantially coincident in the clamping position (600) to the carrier slot (312) Slit (314), wherein the sliding element (304) in the transport position (310) on the support (302) adjacent to the wedge structure (308) rests and in the clamping position (600) on the wedge structure (308), wherein the wedge structure (308 ) defines a span distance between the carrier (302) and the sliding member (304). Clamp (300) according to Claim 1 in that the carrier (302) has attachment means (316) for engaging a contact contour (402) of the bus bar (400), the attachment means (316) being adapted to engage the carrier slot (312) of the carrier (302) align corresponding receiving slot (404) of the contact contour (402). A clamp (300) as claimed in any one of the preceding claims, wherein the carrier (302) includes spring loaded latch means (320) for latching to the pusher member (304) when the pusher member (304) is in the cocking position (600). A clamp (300) according to any one of the preceding claims, wherein the carrier (302) comprises a transport lock (322) for holding the pusher (304) in the transport position (310). Clamp (300) according to Claim 1 wherein the spacer (202) is formed as a lug (212) on the shank (210) between the abutment surface (206) and the thread (214), the lug (212) having a larger diameter than the thread (214). , Clamp (300) according to Claim 1 wherein the spacer (202) is formed as a sheath (216) disposed on the shank (210) between the abutment surface (206) and the thread (214), wherein the sleeve (216) has a larger diameter than the thread (214 ). Clamp (300) according to one of the preceding claims, wherein the distance (204) by a material thickness of a busbar to be contacted (400), a thickness of a force on the busbar (400) retractable clamp (300) in a transport position (310) and a desired Gap between the contact surface (206), the clamping clip (300) and the busbar (400) is defined. A method of electrically contacting a contactor (100) with a bus bar (400), the method comprising the steps of: Screwing in a screw (200), the screw (200) a shaft (210) having a thread (214) for screwing into a in an contact surface (102) of the contactor (100) arranged inside thread (104) of the contactor (100); a screw head (208) adjoining the shaft (210) with a contact surface (206) aligned transversely to the shaft (210); and a spacer (202) for defining a distance (204) between the abutment surface (206) and the contact surface (102) into the internal thread (104) of the contactor (100) until the spacer (202) interposes the distance (204) the contact surface (102) and the abutment surface (206) of the screw head (208) defined; Sliding on the bus bar (400) a clip (300) according to any one of the preceding claims until the carrier slot (312) of the carrier (302) of the clip (300) is aligned with a receiving slot (404) of the bus bar (400); Inserting the screw (200) in the receiving slot (404), so that the bus bar (400) on the contact surface (102) is applied and the clamping clip (300) between the contact surface (206) of the screw (200) and the bus bar (400) is; and Moving the sliding member (304) from the transport position (310) to the clamping position (600) to press the bus bar (400) onto the contact surface (102).

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