GB1240036A - Electric circuit breaker - Google Patents

Electric circuit breaker

Info

Publication number
GB1240036A
GB1240036A GB22059/70A GB2205970A GB1240036A GB 1240036 A GB1240036 A GB 1240036A GB 22059/70 A GB22059/70 A GB 22059/70A GB 2205970 A GB2205970 A GB 2205970A GB 1240036 A GB1240036 A GB 1240036A
Authority
GB
United Kingdom
Prior art keywords
yoke
jan
current
permanent magnet
secondary winding
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
GB22059/70A
Inventor
Noroimi Miyoshi
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Fuji Electric Manufacturing Co 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 Fuji Electric Co Ltd, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority claimed from DE1904244A external-priority patent/DE1904244C3/en
Publication of GB1240036A publication Critical patent/GB1240036A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H39/006—Opening by severing a conductor
    • 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
    • H01H9/10—Adaptation for built-in fuses
    • H01H9/106—Adaptation for built-in fuses fuse and switch being connected in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

1,240,036. Current transformers. FUJI DENKI SEIZO K.K. 17 Jan., 1969 [20 Jan., 1968; 31 Jan., 1968], No. 22059/70. Divided out of 1,240,035. Heading H1T. [Also in Division H2] In a protective arrangement (see Division H2) a current transformer 50 has a permanent magnet 51, a yoke 52 and a secondary winding 53 around the yoke 52. The secondary winding 53 produces an output pulse when the direct current I in the primary conductor 3b changes in such a direction as to produce a flux to nullify the flux due to the permanent magnet 51. Reference is made to the use of two such parallel connected transformers to enable an output to be obtained for both current directions or for use in an A.C. circuit. The yoke may be of "square-loop" material and have an air gap 55.
GB22059/70A 1968-01-20 1969-01-17 Electric circuit breaker Expired GB1240036A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP318368 1968-01-20
JP619368 1968-01-31
GB1240035T 1969-01-17
DE1904244A DE1904244C3 (en) 1968-01-20 1969-01-29 Switching device arranged in the course of a high-voltage conductor

Publications (1)

Publication Number Publication Date
GB1240036A true GB1240036A (en) 1971-07-21

Family

ID=27430846

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22059/70A Expired GB1240036A (en) 1968-01-20 1969-01-17 Electric circuit breaker

Country Status (1)

Country Link
GB (1) GB1240036A (en)

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