ES2052979T3 - CONTACT SYSTEM FOR POWER LIMITING CIRCUIT BREAKERS. - Google Patents

CONTACT SYSTEM FOR POWER LIMITING CIRCUIT BREAKERS.

Info

Publication number
ES2052979T3
ES2052979T3 ES90101176T ES90101176T ES2052979T3 ES 2052979 T3 ES2052979 T3 ES 2052979T3 ES 90101176 T ES90101176 T ES 90101176T ES 90101176 T ES90101176 T ES 90101176T ES 2052979 T3 ES2052979 T3 ES 2052979T3
Authority
ES
Spain
Prior art keywords
switching arm
current path
braided cable
journals
circuit
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
ES90101176T
Other languages
Spanish (es)
Inventor
Hans Paluschka
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
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 ES2052979T3 publication Critical patent/ES2052979T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)

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>
ES90101176T 1989-01-23 1990-01-22 CONTACT SYSTEM FOR POWER LIMITING CIRCUIT BREAKERS. Expired - Lifetime ES2052979T3 (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
ES2052979T3 true ES2052979T3 (en) 1994-07-16

Family

ID=6372598

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90101176T Expired - Lifetime ES2052979T3 (en) 1989-01-23 1990-01-22 CONTACT SYSTEM FOR POWER LIMITING CIRCUIT BREAKERS.

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
WO2011097612A1 (en) * 2010-02-08 2011-08-11 Siemens Aktiengesellschaft Circuit breaker electrical contact assembly, and systems and methods using same
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
ATE105971T1 (en) 1994-06-15
EP0380012A1 (en) 1990-08-01
DE59005697D1 (en) 1994-06-23
EP0380012B1 (en) 1994-05-18

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