GB2089591B - Switch protection device - Google Patents

Switch protection device

Info

Publication number
GB2089591B
GB2089591B GB8039358A GB8039358A GB2089591B GB 2089591 B GB2089591 B GB 2089591B GB 8039358 A GB8039358 A GB 8039358A GB 8039358 A GB8039358 A GB 8039358A GB 2089591 B GB2089591 B GB 2089591B
Authority
GB
United Kingdom
Prior art keywords
protection device
switch protection
switch
protection
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
GB8039358A
Other versions
GB2089591A (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.)
RESTBURY ENGINEERS Ltd
Original Assignee
RESTBURY ENGINEERS 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 ENGINEERS Ltd filed Critical RESTBURY ENGINEERS Ltd
Priority to GB8039358A priority Critical patent/GB2089591B/en
Priority to DE8181305812T priority patent/DE3172734D1/en
Priority to EP19810305812 priority patent/EP0054407B1/en
Publication of GB2089591A publication Critical patent/GB2089591A/en
Application granted granted Critical
Publication of GB2089591B publication Critical patent/GB2089591B/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)
GB8039358A 1980-12-09 1980-12-09 Switch protection device Expired GB2089591B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB8039358A GB2089591B (en) 1980-12-09 1980-12-09 Switch protection device
DE8181305812T DE3172734D1 (en) 1980-12-09 1981-12-09 Load current protection circuit
EP19810305812 EP0054407B1 (en) 1980-12-09 1981-12-09 Load current protection circuit

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
GB2089591A GB2089591A (en) 1982-06-23
GB2089591B true GB2089591B (en) 1985-05-22

Family

ID=10517844

Family Applications (1)

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

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
DE3172734D1 (en) 1985-11-28
GB2089591A (en) 1982-06-23
EP0054407B1 (en) 1985-10-23
EP0054407A1 (en) 1982-06-23

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Legal Events

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