GB9022831D0 - Intrinsically safe system - Google Patents

Intrinsically safe system

Info

Publication number
GB9022831D0
GB9022831D0 GB909022831A GB9022831A GB9022831D0 GB 9022831 D0 GB9022831 D0 GB 9022831D0 GB 909022831 A GB909022831 A GB 909022831A GB 9022831 A GB9022831 A GB 9022831A GB 9022831 D0 GB9022831 D0 GB 9022831D0
Authority
GB
United Kingdom
Prior art keywords
intrinsically safe
safe system
intrinsically
safe
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.)
Withdrawn
Application number
GB909022831A
Other versions
GB2238191A (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.)
Drexelbrook Controls Inc
Original Assignee
Drexelbrook Controls Inc
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 Drexelbrook Controls Inc filed Critical Drexelbrook Controls Inc
Publication of GB9022831D0 publication Critical patent/GB9022831D0/en
Publication of GB2238191A publication Critical patent/GB2238191A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/008—Intrinsically safe circuits
    • 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
    • H02H3/023—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order by short-circuiting
    • 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
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/044—Checking correct functioning of protective arrangements, e.g. by simulating a fault
GB9022831A 1989-10-19 1990-10-19 Intrinsically safe system Withdrawn GB2238191A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42413189A 1989-10-19 1989-10-19

Publications (2)

Publication Number Publication Date
GB9022831D0 true GB9022831D0 (en) 1990-12-05
GB2238191A GB2238191A (en) 1991-05-22

Family

ID=23681571

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9022831A Withdrawn GB2238191A (en) 1989-10-19 1990-10-19 Intrinsically safe system

Country Status (3)

Country Link
CA (1) CA2028028A1 (en)
DE (1) DE4033313A1 (en)
GB (1) GB2238191A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4403961C2 (en) * 1994-02-04 1997-07-03 Hartmann & Braun Ag Feeding system for an intrinsically safe fieldbus
CA2209725A1 (en) * 1996-08-14 1998-02-14 M-I Drilling Fluids L.L.C. Control system and method for electrically operated equipment
US6037857A (en) * 1997-06-06 2000-03-14 Allen-Bradley Company, Llc Serial data isolator industrial control system providing intrinsically safe operation
DE29819235U1 (en) * 1998-10-28 1999-12-09 Siemens Ag DC power supply unit
DE10124683B4 (en) * 2001-05-18 2006-06-14 R. Stahl Schaltgeräte GmbH Power limiting circuit
DE10335203A1 (en) * 2003-07-30 2005-03-10 Flowtec Ag Service interface for connection to field devices of process automation
DE102004063708B4 (en) * 2004-12-28 2010-12-16 Endress + Hauser Flowtec Ag Circuit for voltage limiting
US7372397B2 (en) 2005-06-03 2008-05-13 Rosemount Tank Radar Ab Energy storage in a radar level gauge
GB201001867D0 (en) 2010-02-05 2010-03-24 Kitchener Renato Real time, non-disruptive, IEC61158-2 spur short circuit testing method for active device couplers
PT106221A (en) * 2012-03-21 2014-04-11 Portugal Telecom Inovacao S A DEVICE WITH TRIPOLAR PROTECTION TO BE INSERTED AT THE POINT OF FRONTIER, AND THAT SIMULTANEOUSLY ADDES THE RC MESH
US10680433B2 (en) * 2017-08-01 2020-06-09 Fisher-Rosemount Systems, Inc. Methods and apparatus for surge protection of a distributed control system component
DE102018100627B4 (en) * 2018-01-12 2019-10-10 Krohne Messtechnik Gmbh Electrical device with a fused and an unsecured functional device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1412036A (en) * 1972-04-06 1975-10-29 Foxboro Co Interface assembly in a process control system for use where there is a fire hazard
US3878434A (en) * 1973-12-10 1975-04-15 Leeds & Northrup Co Power-limiting electrical barrier device
DE2724176B2 (en) * 1977-05-27 1979-06-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen DC power system
US4412265A (en) * 1981-11-27 1983-10-25 Tokheim Corporation Intrinsic barrier
GB2139830B (en) * 1983-04-26 1987-01-07 Manufacturing Electrical Desig Power supply for use in inflammable atmospheres
DE3906621C2 (en) * 1989-03-02 1995-05-04 Hemscheidt Maschf Hermann Intrinsically safe power supply unit

Also Published As

Publication number Publication date
GB2238191A (en) 1991-05-22
CA2028028A1 (en) 1991-04-20
DE4033313A1 (en) 1991-06-13

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)