GB1526011A - Multi-pole circuit breaker with adjustable thermal trip unit - Google Patents

Multi-pole circuit breaker with adjustable thermal trip unit

Info

Publication number
GB1526011A
GB1526011A GB525176A GB525176A GB1526011A GB 1526011 A GB1526011 A GB 1526011A GB 525176 A GB525176 A GB 525176A GB 525176 A GB525176 A GB 525176A GB 1526011 A GB1526011 A GB 1526011A
Authority
GB
United Kingdom
Prior art keywords
bar
tripping
auxiliary
circuit breaker
pole
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
GB525176A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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
Priority claimed from US05/551,937 external-priority patent/US3950717A/en
Priority claimed from US05/551,936 external-priority patent/US3950716A/en
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1526011A publication Critical patent/GB1526011A/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
    • H01H71/7418—Adjusting both electrothermal and electromagnetic mechanism
    • 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
    • H01H71/1009—Interconnected mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H2009/0088—Details of rotatable shafts common to more than one pole or switch unit
    • 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
    • H01H2071/7481—Means for adjusting the conditions under which the device will function to provide protection with indexing means for magnetic or thermal tripping adjustment knob

Landscapes

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

Abstract

1526011 Circuit breakers WESTINGHOUSE EI ECTRIC CORP 11 Feb 1976 [21 Feb 1975 (2)] 05251/76 Heading H1N A multipole circuit breaker has a common operating lever (65, Fig. 1, not shown), a common shaft (37) carrying all moving contacts (23), a bimetallic strip 77, for detecting overcurrent, in each pole and a contact-latching system releasable on engagement of a bimetallic strip 77 with a tripping bar structure, which structure comprises a main bar 95 for performing the tripping movement and an auxiliary bar 97 to be engaged by the bimetallic strips 77, the two bars moving in unison but being adjustably interconnected to enable variation of the spacing between auxiliary bar 97 and bimetallic strips 77, a rotatable cam structure 111, 113, 115 being mounted on the one bar and acting on the other to provide an adjusting means. The two bars are pivotally interconnected. The cam structure includes a rotating shaft 113 that either carries a cam 115 or is eccentrically mounted (Figs. 9-11, not shown) so that it itself provides a camming effect. Its rotation is restricted by shoulders (127, 128, Fig. 8, not shown) or a flange (120, Fig. 9) to less than 360 degrees. The release current of each pole is adjustable by a screw 79 set in the auxiliary tripping bar.
GB525176A 1975-02-21 1976-02-11 Multi-pole circuit breaker with adjustable thermal trip unit Expired GB1526011A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/551,937 US3950717A (en) 1975-02-21 1975-02-21 Multi-pole circuit breaker with adjustable thermal trip unit
US05/551,936 US3950716A (en) 1975-02-21 1975-02-21 Multi-pole circuit breaker with adjustable thermal trip unit

Publications (1)

Publication Number Publication Date
GB1526011A true GB1526011A (en) 1978-09-27

Family

ID=27069903

Family Applications (1)

Application Number Title Priority Date Filing Date
GB525176A Expired GB1526011A (en) 1975-02-21 1976-02-11 Multi-pole circuit breaker with adjustable thermal trip unit

Country Status (4)

Country Link
DE (1) DE2604919A1 (en)
ES (1) ES445347A1 (en)
FR (1) FR2301913A1 (en)
GB (1) GB1526011A (en)

Also Published As

Publication number Publication date
AU1104176A (en) 1977-08-18
DE2604919A1 (en) 1976-09-09
FR2301913A1 (en) 1976-09-17
ES445347A1 (en) 1977-06-01

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Legal Events

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