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GB2004698A - Circuit breaker trip - Google Patents

Circuit breaker trip

Info

Publication number
GB2004698A
GB2004698A GB7832413A GB7832413A GB2004698A GB 2004698 A GB2004698 A GB 2004698A GB 7832413 A GB7832413 A GB 7832413A GB 7832413 A GB7832413 A GB 7832413A GB 2004698 A GB2004698 A GB 2004698A
Authority
GB
United Kingdom
Prior art keywords
trip
rod
circuit breaker
trip bar
poles
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
GB7832413A
Other versions
GB2004698B (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 GB7832413A priority Critical patent/GB2004698B/en
Publication of GB2004698A publication Critical patent/GB2004698A/en
Application granted granted Critical
Publication of GB2004698B publication Critical patent/GB2004698B/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 a multi-pole moulded-case electric circuit breaker wherein each pole has an excess-current trip actuator e.g. bimetal strip 16, which carries an adjusting screw 17 to engage an inclined abutment surface 56 and so cause pivotal tripping movement, about a rod 52, of a trip bar common to all poles and formed of three levers such as 51 solidly linked side-by-side on the rod 52, the trip bar is adapted for adjusting displacement laterally along the rod 52 by means of a cranked pin and slot device 73-73 to simultaneously adjust the trip-rating of all poles by varying the effective spacing between the calibrating screws 7 and their respective inclined abutment surfaces 56 on the trip bar. <IMAGE>
GB7832413A 1977-09-17 1978-08-07 Electric circuit breakers Expired GB2004698B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7832413A GB2004698B (en) 1977-09-17 1978-08-07 Electric circuit breakers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3885677 1977-09-17
GB7832413A GB2004698B (en) 1977-09-17 1978-08-07 Electric circuit breakers

Publications (2)

Publication Number Publication Date
GB2004698A true GB2004698A (en) 1979-04-04
GB2004698B GB2004698B (en) 1982-02-17

Family

ID=26263938

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7832413A Expired GB2004698B (en) 1977-09-17 1978-08-07 Electric circuit breakers

Country Status (1)

Country Link
GB (1) GB2004698B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540961A (en) * 1983-12-19 1985-09-10 Westinghouse Electric Corp. Molded case circuit breaker with an apertured molded cross bar for supporting a movable electrical contact arm
AU573286B2 (en) * 1983-12-19 1988-06-02 Westinghouse Electric Corporation Molded case circuit breaker with apertured molded cross bar

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540961A (en) * 1983-12-19 1985-09-10 Westinghouse Electric Corp. Molded case circuit breaker with an apertured molded cross bar for supporting a movable electrical contact arm
AU573286B2 (en) * 1983-12-19 1988-06-02 Westinghouse Electric Corporation Molded case circuit breaker with apertured molded cross bar

Also Published As

Publication number Publication date
GB2004698B (en) 1982-02-17

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Legal Events

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