ATE105971T1 - CONTACT SYSTEM FOR CURRENT-LIMITING CIRCUIT BREAKER. - Google Patents

CONTACT SYSTEM FOR CURRENT-LIMITING CIRCUIT BREAKER.

Info

Publication number
ATE105971T1
ATE105971T1 AT90101176T AT90101176T ATE105971T1 AT E105971 T1 ATE105971 T1 AT E105971T1 AT 90101176 T AT90101176 T AT 90101176T AT 90101176 T AT90101176 T AT 90101176T AT E105971 T1 ATE105971 T1 AT E105971T1
Authority
AT
Austria
Prior art keywords
switching arm
current path
current
braided cable
journals
Prior art date
Application number
AT90101176T
Other languages
German (de)
Inventor
Hans Paluschka
Original Assignee
Kloeckner 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 Kloeckner Moeller Gmbh filed Critical Kloeckner Moeller Gmbh
Application granted granted Critical
Publication of ATE105971T1 publication Critical patent/ATE105971T1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/104—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement with a stable blow-off position

Abstract

In known contact systems for current-limiting circuit breakers, with two moving switching arms in each case per phase, the lower switching arm is connected to the current path by means of a braided cable and, in the event of a short-circuit, pivots against the movement direction of the upper switching arm, which is coupled to the latching mechanism. As a result of the dynamic deflection of the two switching arms in the event of a short-circuit, the arc between the contact pieces is admittedly additionally extended and extinguished more quickly, but the braided cable for the current supply just forms a weak point on the lower switching arm to the extent that the welded attachment of the braided cable to the switching arm is mechanically very highly loaded by the impact-like deflection in the event of a short-circuit. The braided cable can be dispensed with in that the second moving switching arm (3) is held by means of journals (8), directed coaxially to the side, in open, approximately half- cylindrical bearing recesses (9) in pivotably sprung contact on the underside (10) of the current path (6). The moving switching arm (3) additionally has stop tabs (20), which are offset in a parallel manner with respect to the free end of the current path (6), opposite the journals (8), which stop tabs (20) rest on the upper side of the current path (6) when the switching arm (3) is in the switched-on position and secure the spring-loaded switching arm (3) together with the journals (8) on the current path (6) in its switched-on position. <IMAGE>
AT90101176T 1989-01-23 1990-01-22 CONTACT SYSTEM FOR CURRENT-LIMITING CIRCUIT BREAKER. ATE105971T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3901852A DE3901852A1 (en) 1989-01-23 1989-01-23 CONTACT SYSTEM FOR CURRENT CIRCUIT BREAKERS

Publications (1)

Publication Number Publication Date
ATE105971T1 true ATE105971T1 (en) 1994-06-15

Family

ID=6372598

Family Applications (1)

Application Number Title Priority Date Filing Date
AT90101176T ATE105971T1 (en) 1989-01-23 1990-01-22 CONTACT SYSTEM FOR CURRENT-LIMITING CIRCUIT BREAKER.

Country Status (4)

Country Link
EP (1) EP0380012B1 (en)
AT (1) ATE105971T1 (en)
DE (2) DE3901852A1 (en)
ES (1) ES2052979T3 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4337344B4 (en) * 1993-11-02 2005-08-25 Moeller Gmbh Current limiting contact system for circuit breakers
DE19530492B4 (en) * 1995-08-18 2005-08-04 Siemens Ag Movement contact with cutting edge positioning
DE10218938B4 (en) * 2002-04-19 2004-07-01 Siemens Ag Arrangement for mounting a switching shaft of an electrical switch and low-voltage circuit breaker with an arrangement for mounting the switching shaft
DE10239641B3 (en) * 2002-08-29 2004-02-12 Moeller Gmbh Simplified contact system for low voltage circuit breaker, comprises compression spring with bent end, forming center of pressure and bearing point against contact arm
DE10252741B3 (en) * 2002-11-13 2004-02-26 Moeller Gmbh Contact system for low voltage power switch, has switch piece floating bearing provided by bearing pin located in elongate opening for rotation of switch piece upon abutting stop provided by switch housing
CN102822932B (en) * 2010-02-08 2015-12-02 西门子公司 The system and method for circuit breaker electric contact assembly and use circuit breaker electric contact assembly
CN102376497B (en) * 2010-08-23 2014-02-26 上海电科电器科技有限公司 Slice-type contact structure of moulded case circuit breaker
DE102017107441A1 (en) 2017-04-06 2018-10-11 Schaltbau Gmbh Switchgear with contact cover

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365561A (en) * 1966-11-21 1968-01-23 Gen Electric Multiple finger type current-carrying contact arm pivot assembly
US3555471A (en) * 1968-02-28 1971-01-12 Vni I Pk I Electr Oapparatov Automatic breaker with coil adjustable to effect current limiting or electrodynamic blowoff compensation
US4259651A (en) * 1978-10-16 1981-03-31 Westinghouse Electric Corp. Current limiting circuit interrupter with improved operating mechanism
US4554427A (en) * 1983-12-19 1985-11-19 Westinghouse Electric Corp. Molded case circuit breaker with movable lower electrical contact

Also Published As

Publication number Publication date
DE3901852A1 (en) 1990-07-26
DE59005697D1 (en) 1994-06-23
EP0380012A1 (en) 1990-08-01
ES2052979T3 (en) 1994-07-16
EP0380012B1 (en) 1994-05-18

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Legal Events

Date Code Title Description
REN Ceased due to non-payment of the annual fee