GB1250766A - - Google Patents

Info

Publication number
GB1250766A
GB1250766A GB1250766DA GB1250766A GB 1250766 A GB1250766 A GB 1250766A GB 1250766D A GB1250766D A GB 1250766DA GB 1250766 A GB1250766 A GB 1250766A
Authority
GB
United Kingdom
Prior art keywords
contacts
relay
bridge
thyristors
sets
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
Other languages
English (en)
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 filed Critical
Publication of GB1250766A publication Critical patent/GB1250766A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Emergency Protection Circuit Devices (AREA)
GB1250766D 1967-07-05 1968-07-02 Expired GB1250766A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR113113A FR1537781A (fr) 1967-07-05 1967-07-05 Dispositif détecteur d'incidents sur ligne ou câble bifilaire

Publications (1)

Publication Number Publication Date
GB1250766A true GB1250766A (de) 1971-10-20

Family

ID=8634477

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1250766D Expired GB1250766A (de) 1967-07-05 1968-07-02

Country Status (4)

Country Link
BE (1) BE717582A (de)
DE (1) DE1763618A1 (de)
FR (1) FR1537781A (de)
GB (1) GB1250766A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208052A (en) * 1987-08-14 1989-02-15 B & R Electrical Prod Ltd Protection circuit responsive to severance of conductors
GB2406726A (en) * 2003-09-30 2005-04-06 Fisher Rosemount Systems Inc Communication bus for Hazardous areas

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2364462A1 (fr) * 1976-09-10 1978-04-07 Gravejat Bernard Dispositif pour le controle permanent de lignes a deux conducteurs

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208052A (en) * 1987-08-14 1989-02-15 B & R Electrical Prod Ltd Protection circuit responsive to severance of conductors
GB2208052B (en) * 1987-08-14 1991-08-07 B & R Electrical Prod Ltd Improvements in or related to circuit breakers used with electrical apparatus
GB2406726A (en) * 2003-09-30 2005-04-06 Fisher Rosemount Systems Inc Communication bus for Hazardous areas
GB2406726B (en) * 2003-09-30 2007-05-16 Fisher Rosemount Systems Inc Communication bus suitable for use in hazardous area of a process plant
US7684167B2 (en) 2003-09-30 2010-03-23 Fisher-Rosemount Systems, Inc. Communication bus suitable for use in a hazardous area of a process plant

Also Published As

Publication number Publication date
BE717582A (de) 1968-12-16
DE1763618A1 (de) 1971-11-18
FR1537781A (fr) 1968-08-30

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Legal Events

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