DE3172734D1 - Load current protection circuit - Google Patents

Load current protection circuit

Info

Publication number
DE3172734D1
DE3172734D1 DE8181305812T DE3172734T DE3172734D1 DE 3172734 D1 DE3172734 D1 DE 3172734D1 DE 8181305812 T DE8181305812 T DE 8181305812T DE 3172734 T DE3172734 T DE 3172734T DE 3172734 D1 DE3172734 D1 DE 3172734D1
Authority
DE
Germany
Prior art keywords
protection circuit
load current
current protection
load
circuit
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
DE8181305812T
Other languages
German (de)
Inventor
Stuart Charles Clatworthy
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.)
RESTBURY Ltd
Original Assignee
RESTBURY 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 RESTBURY Ltd filed Critical RESTBURY Ltd
Application granted granted Critical
Publication of DE3172734D1 publication Critical patent/DE3172734D1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/22—Provisions facilitating manual calibration, e.g. input or output provisions for testing; Holding of intermittent values to permit measurement
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Keying Circuit Devices (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
DE8181305812T 1980-12-09 1981-12-09 Load current protection circuit Expired DE3172734D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8039358A GB2089591B (en) 1980-12-09 1980-12-09 Switch protection device

Publications (1)

Publication Number Publication Date
DE3172734D1 true DE3172734D1 (en) 1985-11-28

Family

ID=10517844

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181305812T Expired DE3172734D1 (en) 1980-12-09 1981-12-09 Load current protection circuit

Country Status (3)

Country Link
EP (1) EP0054407B1 (en)
DE (1) DE3172734D1 (en)
GB (1) GB2089591B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2249840B (en) * 1990-11-13 1995-01-11 Alireza Ghazi Hessami Universal digital input channel
ES2253065B1 (en) * 2004-03-22 2007-07-16 Jose Luis Diaz Mejia DEVICE AND METHOD OF EXTENDED PROTECTION OF ELECTRICAL LINES.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179930A (en) * 1961-03-28 1965-04-20 Cutler Hammer Inc Circuit condition indicating systems
US3505664A (en) * 1967-07-07 1970-04-07 Hubbell Inc Harvey Switch condition indicator
US3626248A (en) * 1970-02-06 1971-12-07 Struthers Dunn Contact monitoring system
US4191946A (en) * 1977-10-20 1980-03-04 Gonzalez Raymond J Warning apparatus with a line integrity supervisory circuit

Also Published As

Publication number Publication date
GB2089591A (en) 1982-06-23
EP0054407B1 (en) 1985-10-23
EP0054407A1 (en) 1982-06-23
GB2089591B (en) 1985-05-22

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee