GB2004699A - Circuit breaker trip - Google Patents

Circuit breaker trip

Info

Publication number
GB2004699A
GB2004699A GB7832414A GB7832414A GB2004699A GB 2004699 A GB2004699 A GB 2004699A GB 7832414 A GB7832414 A GB 7832414A GB 7832414 A GB7832414 A GB 7832414A GB 2004699 A GB2004699 A GB 2004699A
Authority
GB
United Kingdom
Prior art keywords
circuit breaker
breaker trip
trip bar
bimetal strip
breaker
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.)
Granted
Application number
GB7832414A
Other versions
GB2004699B (en
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.)
Dorman Smith Switchgear Ltd
Original Assignee
Dorman Smith Switchgear Ltd
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 Dorman Smith Switchgear Ltd filed Critical Dorman Smith Switchgear Ltd
Priority to GB7832414A priority Critical patent/GB2004699B/en
Publication of GB2004699A publication Critical patent/GB2004699A/en
Application granted granted Critical
Publication of GB2004699B publication Critical patent/GB2004699B/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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism

Landscapes

  • Breakers (AREA)

Abstract

In an electric circuit breaker, the amount by which a bimetal strip 16 must deflect to cause breaker-tripping movement of a trip bar 51 is adjustable by displacing the trip bar 51 in an axial direction so as to shift an inclined abutment surface 56 relative to a calibration screw 17 carried by the bimetal strip 16. Adjustment is effected manually from outside the circuit breaker by means of a peg 74 projecting from a crank arm 73 rotatable within limits by means of a slotted extension 66 of a boss 65. <IMAGE>
GB7832414A 1977-09-17 1978-08-07 Electric circuit breakers Expired GB2004699B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7832414A GB2004699B (en) 1977-09-17 1978-08-07 Electric circuit breakers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3885577 1977-09-17
GB7832414A GB2004699B (en) 1977-09-17 1978-08-07 Electric circuit breakers

Publications (2)

Publication Number Publication Date
GB2004699A true GB2004699A (en) 1979-04-04
GB2004699B GB2004699B (en) 1982-01-27

Family

ID=26263937

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7832414A Expired GB2004699B (en) 1977-09-17 1978-08-07 Electric circuit breakers

Country Status (1)

Country Link
GB (1) GB2004699B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3812934A1 (en) * 1988-04-19 1989-11-02 Sursum Elektrizitaetsgesellsch MULTI-PHASE CIRCUIT BREAKER
US6486759B2 (en) 2000-11-29 2002-11-26 General Electric Company Circuit breaker calibration screw
GB2441356A (en) * 2006-08-29 2008-03-05 Ls Ind Systems Co Ltd Instantaneous trip mechanism for mould cased circuit breaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3812934A1 (en) * 1988-04-19 1989-11-02 Sursum Elektrizitaetsgesellsch MULTI-PHASE CIRCUIT BREAKER
US6486759B2 (en) 2000-11-29 2002-11-26 General Electric Company Circuit breaker calibration screw
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
GB2004699B (en) 1982-01-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee