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GB1148957A - Electric circuit breakers with improved tripping means - Google Patents

Electric circuit breakers with improved tripping means

Info

Publication number
GB1148957A
GB1148957A GB25970/67A GB2597067A GB1148957A GB 1148957 A GB1148957 A GB 1148957A GB 25970/67 A GB25970/67 A GB 25970/67A GB 2597067 A GB2597067 A GB 2597067A GB 1148957 A GB1148957 A GB 1148957A
Authority
GB
United Kingdom
Prior art keywords
bar
circuit breakers
armatures
june
contacts
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
Application number
GB25970/67A
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.)
Schneider Electric USA Inc
Original Assignee
Square D Co
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 Square D Co filed Critical Square D Co
Publication of GB1148957A publication Critical patent/GB1148957A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7418—Adjusting both electrothermal and electromagnetic mechanism

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

1,148,957. Automatic circuit breakers. SQUARE D CO. 6 June, 1967 [29 June, 1966], No. 25970/67. Heading H1N. A multi-pole circuit breaker includes an airgap adjusting cross-bar 29 for controlling the position of each of the armatures 72 with respect to its associated core member 67. The cross-bar 29 is pivotally mounted in brackets 70 and has three screws 76, one in each pole space, engaging actuating members 73 mounted on armature rods 71 carrying the armatures 72. Upon severe overload current through a terminal strap 62 the core 67 attracts its armature 72 and the actuating member 73 pivots a trip bar 57, thereby releasing an intermediate latch member 54 and a trip lever 34 to effect movement of the contacts 48 in all three poles to open position. Moderate overload current through the terminal strap 62 and a heating strip 65 causes heating of a bi-metallic strip 64, the free end of which engages the trip bar 57 to pivot it and cause opening of contacts 48. A screwdriver is used to rotate a control member 28 bearing a cam 78 which co-operates with and pivotally adjusts the air-gap adjusting cross-bar 29. The operating mechanism is as in Specification 1,094,377.
GB25970/67A 1966-06-29 1967-06-06 Electric circuit breakers with improved tripping means Expired GB1148957A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US561456A US3345591A (en) 1966-06-29 1966-06-29 Electric circuit breaker with improved tripping means including a heater strip in the thermal tripping means and adjustable air gaps in the magnetic tripping means

Publications (1)

Publication Number Publication Date
GB1148957A true GB1148957A (en) 1969-04-16

Family

ID=24242048

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25970/67A Expired GB1148957A (en) 1966-06-29 1967-06-06 Electric circuit breakers with improved tripping means

Country Status (3)

Country Link
US (1) US3345591A (en)
DE (1) DE1588732B1 (en)
GB (1) GB1148957A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2441356A (en) * 2006-08-29 2008-03-05 Ls Ind Systems Co Ltd Instantaneous trip mechanism for mould cased circuit breaker

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758887A (en) * 1968-02-06 1973-09-11 Westinghouse Electric Corp Multi-pole circuit breaker with single trip adjustment for all poles
US3480890A (en) * 1968-03-26 1969-11-25 Square D Co Molded-case circuit breaker with manual tripping means externally accessible only by a tool
US3949331A (en) * 1974-05-15 1976-04-06 Westinghouse Electric Corporation Circuit breaker with adjustable thermal trip unit
US3950716A (en) * 1975-02-21 1976-04-13 Westinghouse Electric Corporation Multi-pole circuit breaker with adjustable thermal trip unit
US3950717A (en) * 1975-02-21 1976-04-13 Westinghouse Electric Corporation Multi-pole circuit breaker with adjustable thermal trip unit
US4128822A (en) * 1977-02-28 1978-12-05 Square D Company Polyphase circuit breaker having improved trip crossbar assembly
EP0143022B1 (en) * 1983-10-21 1988-06-01 Merlin Gerin Thermal and magnetic circuit breaker tripping mechanism
DE19903911B4 (en) * 1999-02-01 2004-09-23 Ge Power Controls Polska Sp.Z.O.O. Tripping device for switches and switch contact arrangement
ES2618052T3 (en) * 2013-09-17 2017-06-20 Lsis Co., Ltd. Circuit breaker with magnetic fixing means
US9343257B2 (en) 2013-09-17 2016-05-17 Lsis Co., Ltd. Circuit breaker with a magnet fixing means

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673264A (en) * 1952-04-17 1954-03-23 Fed Electric Prod Co Circuit breaker with adjustable thermal and magnetic controls
US3211860A (en) * 1960-03-02 1965-10-12 Westinghouse Electric Corp Circuit breaker with improved trip-device enclosure
US3249720A (en) * 1962-02-19 1966-05-03 Ite Circuit Breaker Ltd Thermal trip unit with calibrating adjustment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2441356A (en) * 2006-08-29 2008-03-05 Ls Ind Systems Co Ltd Instantaneous trip mechanism for mould cased circuit breaker
GB2441356B (en) * 2006-08-29 2008-10-29 Ls Ind Systems Co Ltd Instantaneous trip mechanism for mould cased circuit breaker

Also Published As

Publication number Publication date
DE1588732B1 (en) 1971-10-21
US3345591A (en) 1967-10-03

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