DE3370089D1 - Short circuit fault isolation means for electrical circuit arrangements - Google Patents

Short circuit fault isolation means for electrical circuit arrangements

Info

Publication number
DE3370089D1
DE3370089D1 DE8383303841T DE3370089T DE3370089D1 DE 3370089 D1 DE3370089 D1 DE 3370089D1 DE 8383303841 T DE8383303841 T DE 8383303841T DE 3370089 T DE3370089 T DE 3370089T DE 3370089 D1 DE3370089 D1 DE 3370089D1
Authority
DE
Germany
Prior art keywords
circuit
circuit elements
short circuit
isolating
supply unit
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
DE8383303841T
Other languages
German (de)
Inventor
Roger Dennis Payne
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.)
Apollo Fire Detectors Ltd
Original Assignee
Apollo Fire Detectors 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10531742&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3370089(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Apollo Fire Detectors Ltd filed Critical Apollo Fire Detectors Ltd
Application granted granted Critical
Publication of DE3370089D1 publication Critical patent/DE3370089D1/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
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Electronic Switches (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

Circuitry is described for isolating a section of a loop circuit (L) from a bi-directional supply unit (20) in the event of a short circuit in the section. One or more circuit elements (21), such as fire detectors, are connected in respective portions of the loop circuit and between respective pairs of bi-directional isolators (1, 2, 3, 4). Each isolator includes switching means (TR1, TR3) providing low and high impedance paths for respectively supplying current to said circuit elements and isolating said circuit elements from the supply unit (20). Each isolator also includes sensing means (TR2, D1, D7) for sensing a short circuit in any one of the circuit elements (21) whereby the sensing means causes a change in state of the switching means from the low to the high impedance path thereby isolating the circuit elements in the respective section of the loop from the supply unit.
DE8383303841T 1982-07-16 1983-07-01 Short circuit fault isolation means for electrical circuit arrangements Expired DE3370089D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8220753 1982-07-16

Publications (1)

Publication Number Publication Date
DE3370089D1 true DE3370089D1 (en) 1987-04-09

Family

ID=10531742

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383303841T Expired DE3370089D1 (en) 1982-07-16 1983-07-01 Short circuit fault isolation means for electrical circuit arrangements

Country Status (4)

Country Link
EP (1) EP0101172B2 (en)
AT (1) ATE25781T1 (en)
DE (1) DE3370089D1 (en)
NO (1) NO158479C (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0632517B2 (en) * 1985-07-19 1994-04-27 ホーチキ株式会社 Abnormality monitoring device
JPS62117688U (en) * 1986-01-13 1987-07-25
US5400203A (en) * 1992-07-29 1995-03-21 Pittway Corporation, A Delaware Corporation Short circuit detector and isolator
JP3382370B2 (en) * 1994-08-18 2003-03-04 能美防災株式会社 Transmission line monitoring equipment for fire alarm equipment
GB9623277D0 (en) * 1996-11-08 1997-01-08 King K W Passive isolator
DE10048599C1 (en) 2000-09-30 2002-04-18 Bosch Gmbh Robert Device for the electrical power supply of detectors, control and signaling devices
GB0118442D0 (en) * 2001-07-28 2001-09-19 Computionics Ltd A fire alarm module
GB2484288A (en) 2010-10-04 2012-04-11 Thorn Security Isolator Circuit for detector
EP3822936B1 (en) * 2019-11-13 2023-09-13 Carrier Corporation Short-circuit isolator
EP3913594A1 (en) 2020-05-21 2021-11-24 Carrier Corporation Short circuit locating
EP4106125A1 (en) * 2021-06-18 2022-12-21 Carrier Fire & Security EMEA BV Short-circuit isolator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH651688A5 (en) * 1980-06-23 1985-09-30 Cerberus Ag METHOD FOR TRANSMITTING MEASURED VALUES IN A FIRE DETECTING SYSTEM AND DEVICE FOR IMPLEMENTING THE METHOD.

Also Published As

Publication number Publication date
EP0101172B2 (en) 1992-05-06
NO158479C (en) 1988-09-14
NO832563L (en) 1984-01-17
EP0101172A1 (en) 1984-02-22
EP0101172B1 (en) 1987-03-04
ATE25781T1 (en) 1987-03-15
NO158479B (en) 1988-06-06

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8366 Restricted maintained after opposition proceedings
8339 Ceased/non-payment of the annual fee