EP1145384B1 - Connecting terminal - Google Patents

Connecting terminal Download PDF

Info

Publication number
EP1145384B1
EP1145384B1 EP99973512A EP99973512A EP1145384B1 EP 1145384 B1 EP1145384 B1 EP 1145384B1 EP 99973512 A EP99973512 A EP 99973512A EP 99973512 A EP99973512 A EP 99973512A EP 1145384 B1 EP1145384 B1 EP 1145384B1
Authority
EP
European Patent Office
Prior art keywords
steel
clamping frame
connecting terminal
cold
clamping
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.)
Expired - Lifetime
Application number
EP99973512A
Other languages
German (de)
French (fr)
Other versions
EP1145384A1 (en
Inventor
Kurt Händler
Klaus Schmitz
Albert Zacharias
Jakob Bolz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Industries GmbH
Original Assignee
Moeller GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Moeller GmbH filed Critical Moeller GmbH
Publication of EP1145384A1 publication Critical patent/EP1145384A1/en
Application granted granted Critical
Publication of EP1145384B1 publication Critical patent/EP1145384B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • H01R4/30—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

Definitions

  • the invention relates to a connection terminal for electrical switching devices the preamble of claim 1.
  • Such an exclusion clamp is from the Document DE-U-94 06 108 known.
  • connection terminals Essentially two different types are known. Depending on the material used, these clamps are designed with closed clamp frames in a first embodiment and with open clamp frames in a second embodiment.
  • clamp frames in an open embodiment increased demands are to be made of the material to be used with regard to the tensile strength (Rm) and the yield strength (Rp 0.2 ). The requirements are varied. On the one hand, a certain strength of the clamping frame is required so that it does not plastically deform under load, and on the other hand, the material must be sufficiently soft so that it can still be processed as well as possible (especially punching and bending).
  • Known clamping frames only partially meet these requirements.
  • the invention is therefore based on the object of having a connecting terminal to create a particularly open clip frame that the previously mentioned requirements better than conventional Clamping frame.
  • the clamping frame 2 made of a non-magnetizable steel, in Form of a chrome-nickel alloy with an austenitic structure.
  • the Distribution of chromium and nickel within the alloy is chosen so that after work hardening of the material by cold working, this remains non-magnetizable. For this the material becomes like this cold worked that a cross-sectional decrease of 15-20%, preferably 17%, is reached (Fig. 3).
  • FIG. 2 shows the mass content diagram of a particularly preferred material.
  • This is the material with the steel key number 1.4571 (DIN 17007). After a special work hardening, this material fully fulfills the requirements of the invention.
  • the chrome-nickel alloy has the greatest possible distance from the line to the transformation of austenite (not magnetizable) into ferrite or martensite (both magnetizable) with the highest possible proportion of nickel. This distance to the transformation line is required so that no strain of martensite or ferrite is produced during work hardening by cold working, which would then make the material magnetizable. Exactly this magnetizability should be avoided in any case in order to keep the self-heating of the connection terminal which occurs due to eddy current losses as low as possible.
  • this steel is not an expensive custom-made product but a standard steel.
  • this steel is strain hardened to a certain extent in order to obtain the desired properties for the clamping frame according to the invention.
  • the steel is cold worked, for example by rolling or drawing, in such a way that the steel has a cross-sectional decrease of 15% -20%.
  • FIG. 3 shows the tensile strength (Rm / N / mm 2 ), the yield strength (Rp 0.2 / N / mm 2 ) and the elongation at break (A b /%) as a function of the decrease in cross section of the steel 1.4571. It can be seen from this that the desired properties are achieved with a cross-sectional decrease of the above-mentioned material by 15% -20%.
  • a steel treated in this way has a tensile strength of 700-800 N / mm 2 and an elastic limit of 600-700 N / mm 2 .
  • the present invention includes all described in claims 2 to 5 Embodiments.

Landscapes

  • Conductive Materials (AREA)
  • Forging (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)

Description

Die Erfindung betrifft eine Anschlußklemme für elektrische Schaltgeräte nach dem Oberbegriff des Anspruchs 1. Eine solche Auschlußklemme ist aus dem Dokument DE-U-94 06 108 bekannt.The invention relates to a connection terminal for electrical switching devices the preamble of claim 1. Such an exclusion clamp is from the Document DE-U-94 06 108 known.

Es sind im wesentlichen zwei unterschiedliche Arten von Anschlußklemmen bekannt. In Abhängigkeit von dem verwendeten Werkstoff sind diese Klemmen in einer ersten Ausführungsform mit geschlossenen und in einer zweiten Ausführungsform mit offenen Klemmrahmen ausgebildet. Für Klemmrahmen in einer offenen Ausführungsform sind erhöhte Anforderungen an das zu verwendende Material in bezug auf die Zugfestigkeit (Rm) und die Dehngrenze (Rp0,2) zu stellen. Die Anforderungen sind vielseitig. So ist zum einen eine gewisse Festigkeit des Klemmrahmens erforderlich, damit dieser unter Belastung sich nicht plastisch verformt, und zum anderen muß der Werkstoff ausreichend weich sein, damit er sich noch möglichst gut verarbeiten (insbesondere stanzen und biegen) läßt. Bereits bekannte Klemmrahmen erfüllen diese Anforderungen nur bedingt.Essentially two different types of connection terminals are known. Depending on the material used, these clamps are designed with closed clamp frames in a first embodiment and with open clamp frames in a second embodiment. For clamp frames in an open embodiment, increased demands are to be made of the material to be used with regard to the tensile strength (Rm) and the yield strength (Rp 0.2 ). The requirements are varied. On the one hand, a certain strength of the clamping frame is required so that it does not plastically deform under load, and on the other hand, the material must be sufficiently soft so that it can still be processed as well as possible (especially punching and bending). Known clamping frames only partially meet these requirements.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Anschlußklemme mit einem insbesondere offenen Klemmrahmen zu schaffen, der die zuvor genannten Anforderungen deutlich besser erfüllt als herkömmliche Klemmrahmen.The invention is therefore based on the object of having a connecting terminal to create a particularly open clip frame that the previously mentioned requirements better than conventional Clamping frame.

Ausgehend von einem Klemmrahmen der eingangs genannten Art wird die Aufgabe erfindungsgemäß durch die kennzeichnenden Merkmale des unabhängigen Anspruches gelöst, während den abhängigen Ansprüchen vorteilhafte Weiterbildungen der Erfindung zu entnehmen sind. Ein Klemmrahmen mit besonders vorteilhaften Eigenschaften wird geschaffen durch eine Materialzusammensetzung des Klemmrahmens bestehend aus einer Chrom-Nickel-Legierung mit einem Chromgehalt von 16%-18%, insbesondere 17%, Massengehalt wobei dieser Stahl durch Längen (z.B. Walzen oder Ziehen) kaltverfestigt wird. Dabei erfährt das Material durch die Kaltverfestigung eine Querschnittsabnahme von 15%-20%, vorzugsweise 17%.Starting from a clamping frame of the type mentioned, the Task according to the characterizing features of independent claim solved during the dependent claims advantageous developments of the invention can be found. On Clamping frames with particularly advantageous properties are created due to a material composition of the clamping frame a chromium-nickel alloy with a chromium content of 16% -18%, in particular 17% by mass, this steel being characterized by lengths (e.g. Rolling or drawing) is work hardened. The material experiences through the Strain hardening a decrease in cross section of 15% -20%, preferably 17%.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus dem folgenden, anhand von Figuren erläuterten Ausführungsbeispiel. Es zeigen

Figur 1:
eine Anschlußklemme mit offenem Klemmrahmen bei herkömmlichem Aufbau;
Figur 2:
ein Massengehaltsdiagramm einer Chrom-Nickel-Legierung; und
Figur 3:
ein Festigkeitsdiagramm für einen bevorzugten Klemmrahmenwerkstoff.
Further details and advantages of the invention result from the following exemplary embodiment explained with reference to figures. Show it
Figure 1:
a terminal with an open terminal frame in a conventional structure;
Figure 2:
a mass content diagram of a chromium-nickel alloy; and
Figure 3:
a strength diagram for a preferred clamping frame material.

Fig. 1 zeigt eine Anschlußklemme mit einem offenen Klemmrahmen 2, einer - eine Klemmschraube 4 aufnehmenden - Klemmmutter 5 und einer an der Klemmschraube 4 befestigten Druckplatte 6. Gemäß der Erfindung besteht insbesondere der Klemmrahmen 2 aus einem nichtmagnetisierbaren Stahl, in Form einer Chrom-Nickel-Legierung, mit austenitischem Gefüge. Die Verteilung von Chrom und Nickel innerhalb der Legierung ist derart gewählt, daß nach einer Kaltverfestigung des Materials durch Kaltverformung, dieses nach wie vor nichtmagnetisierbar bleibt. Hierfür wird das Material derart kaltverformt, daß eine Querschnittsabnahme von 15-20%, vorzugsweise 17%, erreicht wird (Fig. 3).1 shows a connection terminal with an open clamping frame 2, a - a clamping screw 4 receiving - clamping nut 5 and one on the Clamping screw 4 attached pressure plate 6. According to the invention in particular the clamping frame 2 made of a non-magnetizable steel, in Form of a chrome-nickel alloy with an austenitic structure. The Distribution of chromium and nickel within the alloy is chosen so that after work hardening of the material by cold working, this remains non-magnetizable. For this the material becomes like this cold worked that a cross-sectional decrease of 15-20%, preferably 17%, is reached (Fig. 3).

In Fig. 2 ist das Massengehaltsdiagramm eines besonders bevorzugten Werkstoffes dargestellt. Es handelt sich hier um den Werkstoff mit der Stahlschlüsselnummer 1.4571 (DIN 17007). Dieser Werkstoff erfüllt nach einer speziellen Kaltverfestigung die im Sinne der Erfindung gestellten Anforderungen in vollem Umfang. Die Chrom-Nickel-Legierung weist einen möglichst großen Abstand von der Linie zu Umwandlung von Austenit (nicht magnetisierbar) in Ferrit oder Martensit (beide magnetisierbar) auf bei gleichzeitig möglichst hohem Nickelanteil. Dieser Abstand zur Umwandlungslinie wird benötigt, damit bei einer Kaltverfestigung durch Kaltverformung kein Martensit oder Ferrit entsteht, wodurch das Material dann magnetisierbar würde. Genau diese Magnetisierbarkeit soll aber auf jeden Fall vermieden werden, um die durch auftretende Wirbelstromverluste auftretende Eigenerwärmung der Anschlußklemme möglichst niedrig zu halten.
Ferner ist von Vorteil, daß dieser Stahl keine teure Sonderanfertigung sondern ein Standardstahl ist. Gemäß der Erfindung wird dieser Stahl in einem bestimmten Maße kaltverfestigt um die gewünschten Eigenschaften für den erfindungsgemäßen Klemmrahmen zu erhalten. Hierfür wird der Stahl kaltverformt, zum Beispiel durch Walzen oder Ziehen, derart, daß der Stahl eine Querschnittsabnahme von 15%-20% erfährt.2 shows the mass content diagram of a particularly preferred material. This is the material with the steel key number 1.4571 (DIN 17007). After a special work hardening, this material fully fulfills the requirements of the invention. The chrome-nickel alloy has the greatest possible distance from the line to the transformation of austenite (not magnetizable) into ferrite or martensite (both magnetizable) with the highest possible proportion of nickel. This distance to the transformation line is required so that no strain of martensite or ferrite is produced during work hardening by cold working, which would then make the material magnetizable. Exactly this magnetizability should be avoided in any case in order to keep the self-heating of the connection terminal which occurs due to eddy current losses as low as possible.
Another advantage is that this steel is not an expensive custom-made product but a standard steel. According to the invention, this steel is strain hardened to a certain extent in order to obtain the desired properties for the clamping frame according to the invention. For this purpose, the steel is cold worked, for example by rolling or drawing, in such a way that the steel has a cross-sectional decrease of 15% -20%.

In Fig. 3 sind die Zugfestigkeit (Rm / N/mm2), die Dehngrenze (Rp0,2 / N/mm2) sowie die Bruchdehnung (Ab / %) in Abhängigkeit von der Querschnittsabnahme des Stahls 1.4571 dargestellt. Hieraus ist erkennbar, daß bei einer Querschnittsabnahme des o.g. Werkstoffs um 15%-20% die gewünschten Eigenschaften erreicht werden. Ein derart behandelter Stahl weist eine Zugfestigkeit von 700-800 N/mm2 und eine Dehngrenze von 600-700 N/mm2 auf.3 shows the tensile strength (Rm / N / mm 2 ), the yield strength (Rp 0.2 / N / mm 2 ) and the elongation at break (A b /%) as a function of the decrease in cross section of the steel 1.4571. It can be seen from this that the desired properties are achieved with a cross-sectional decrease of the above-mentioned material by 15% -20%. A steel treated in this way has a tensile strength of 700-800 N / mm 2 and an elastic limit of 600-700 N / mm 2 .

Die vorliegende Erfindung umfaßt alle in dem Ansprüchen 2 bis 5 beschriebenen Ausführungsformen.The present invention includes all described in claims 2 to 5 Embodiments.

Claims (6)

  1. Connecting terminal for electrical switchgear, in particular power circuit-breakers, with
    an open clamping frame (2), a clamping screw (4), a clamping nut (5) and a pressure plate (6)
    characterized in that
    the clamping frame (2) consists of a steel with the key number 1.4571 according to DIN 17007, which is cold-formed in such a way that its original cross section is reduced by 15-20%.
  2. Connecting terminal according to Claim 1,
    characterized in that the clamping frame (2) consists of a steel cold-hardened with a cross-sectional reduction of 17%.
  3. Connecting terminal according to Claim 1 or 2,
    characterized in that the steel is cold-hardened and, after cold hardening, has a tensile strength of 700-800 N/mm2 and a yield strength of > 500 N/mm2, in particular 600-700 N/mm2.
  4. Connecting terminal according to one of the preceding claims, characterized in that the clamping frame is of an open form.
  5. Method of producing a clamping frame material for the clamping frame (2) of a connecting terminal according to Claim 1, characterized in that a steel with the key number 1.4571 according to DIN 17007 is cold-formed in such a way that its original cross section is reduced by 15-20%.
  6. Method according to Claim 6, characterized in that the yield strength of the steel is 600-700 N/mm2.
EP99973512A 1998-12-18 1999-11-09 Connecting terminal Expired - Lifetime EP1145384B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19858488 1998-12-18
DE19858488 1998-12-18
PCT/EP1999/008588 WO2000038277A1 (en) 1998-12-18 1999-11-09 Connecting terminal

Publications (2)

Publication Number Publication Date
EP1145384A1 EP1145384A1 (en) 2001-10-17
EP1145384B1 true EP1145384B1 (en) 2003-09-17

Family

ID=7891568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99973512A Expired - Lifetime EP1145384B1 (en) 1998-12-18 1999-11-09 Connecting terminal

Country Status (4)

Country Link
EP (1) EP1145384B1 (en)
AU (1) AU1161700A (en)
DE (2) DE59907062D1 (en)
WO (1) WO2000038277A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10056983A1 (en) * 2000-11-17 2002-05-23 Bsh Bosch Siemens Hausgeraete Fan drive for refrigeration device compressor, has magnetic or magnetisable parts separated by non-magnetisable housing wall and at least one produces magnetic field in operation
DE102009002470A1 (en) * 2009-04-17 2010-10-21 Efen Gmbh Clamp construction as well as load switch bar or isolator with clamp construction
DE202010006409U1 (en) * 2010-05-04 2011-10-12 Weidmüller Interface GmbH & Co. KG threaded plate
CN106911054B (en) * 2017-04-01 2024-03-19 菲尼克斯亚太电气（南京）有限公司 External switch screw switching assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5713976B2 (en) * 1973-01-08 1982-03-20
DE9406108U1 (en) * 1994-04-13 1994-06-16 Klöckner-Moeller GmbH, 53115 Bonn Box clamp for electrical devices
DE19833150C1 (en) * 1998-07-23 1999-10-14 Moeller Gmbh Connection terminal for electrical apparatus, such as power switch

Also Published As

Publication number Publication date
EP1145384A1 (en) 2001-10-17
WO2000038277A1 (en) 2000-06-29
DE29919775U1 (en) 2000-01-20
AU1161700A (en) 2000-07-12
DE59907062D1 (en) 2003-10-23

Similar Documents

Publication Publication Date Title
DE1402867A1 (en) Process for the production of reinforced components
WO1997005951A1 (en) Working part and process for its production
EP1145384B1 (en) Connecting terminal
DE19819148C1 (en) Fiber for reinforcing castable curing materials and method and device for their production
EP0474910B2 (en) Cross-shaped connector and wire rope network with cross-shaped connectors
DE3227466C2 (en)
WO2000002211A1 (en) Inductive component comprising a core
EP0222685B1 (en) Contact arrangement with contact levers mounted in a holder in pivotal relationship to each other
DE2950831C2 (en) Procedure for setting the spring rate of leaf spring assemblies in vibration drives
EP0477423B1 (en) Frame joining system
DE102020100289A1 (en) Method for producing a busbar
DE19727853C1 (en) Low-voltage circuit breakers with one switching shaft
DE4210598C2 (en) Buckling spring
EP0910858B1 (en) Switching contact arrangement with a hinge arrangement for a contact lever
DE4321143A1 (en) Composite body, consisting of materials with different thermal and mechanical properties
DE10204961B9 (en) Device for the condensing connection of electrical conductors
DE8226274U1 (en) SPRING SLIDING KEY
DE1869457U (en) MAGNETIC CIRCUIT WITH SWIVELING ARMATURE FOR CONTACTORS OR SIMILAR DEVICES.
DE1091168B (en) Connection terminal in box shape with U-shaped terminal body
DE19812928A1 (en) Securing method for polymer insulator used for electric line
DE4204641A1 (en) Electric contact for switch device e.g. electromagnetic relay - has convex curved surface with top of curve displaced from middle of surface by predetermined amount
EP0029113B1 (en) Pinned bar for drafting arrangements of textile preparation machines
DE8715295U1 (en) Locking device for a switching device with electromagnetic drive
DE102017223839A1 (en) Magnetic core with yoke legs
DE2333773A1 (en) ELECTROMAGNET WITH POLE LEGS HAVING IRON PARTS

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

17P Request for examination filed

Effective date: 20010505

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030917

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59907062

Country of ref document: DE

Date of ref document: 20031023

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20030917

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20030917

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040618

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20141027

Year of fee payment: 16

Ref country code: DE

Payment date: 20141201

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20141118

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59907062

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151109

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20160729

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151130