GB1470270A - Redundant intrinsically safe electrical barrier - Google Patents

Redundant intrinsically safe electrical barrier

Info

Publication number
GB1470270A
GB1470270A GB67775A GB67775A GB1470270A GB 1470270 A GB1470270 A GB 1470270A GB 67775 A GB67775 A GB 67775A GB 67775 A GB67775 A GB 67775A GB 1470270 A GB1470270 A GB 1470270A
Authority
GB
United Kingdom
Prior art keywords
line
redundant
lines
intrinsically safe
voltages
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
GB67775A
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.)
Baker Petrolite LLC
Original Assignee
Petrolite Corp
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 Petrolite Corp filed Critical Petrolite Corp
Publication of GB1470270A publication Critical patent/GB1470270A/en
Expired 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

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

1470270 Intrinsic safety barriers PETROLITE CORP 7 Jan 1975 [27 March 1974] 677/75 Heading H2K To prevent excessive voltages appearing at a terminal 39 which is supplied via a line A, four voltage-responsive short-circuiting switches 43, 44, 46, 47 are connected between the line and earth, two responding to positive voltages and two to negative voltages and each comprising a triac triggered via a Zener diode. The shortcircuiting action may blow a fuse 51. Resistors 52-54 reduce the current and facilitate testing. There may be a plurality of lines A feeding respective terminals 39, in which case each line is connected through respective sets of diodes 31, 32 to switches common to all lines.
GB67775A 1974-03-27 1975-01-07 Redundant intrinsically safe electrical barrier Expired GB1470270A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US45517374A 1974-03-27 1974-03-27

Publications (1)

Publication Number Publication Date
GB1470270A true GB1470270A (en) 1977-04-14

Family

ID=23807688

Family Applications (1)

Application Number Title Priority Date Filing Date
GB67775A Expired GB1470270A (en) 1974-03-27 1975-01-07 Redundant intrinsically safe electrical barrier

Country Status (8)

Country Link
JP (1) JPS50128156A (en)
BE (1) BE824798A (en)
CA (1) CA1029797A (en)
DE (1) DE2503226A1 (en)
FR (1) FR2266346B1 (en)
GB (1) GB1470270A (en)
IT (1) IT1029395B (en)
NL (1) NL174512C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1697859A2 (en) * 2003-12-01 2006-09-06 Advanced Technology Materials, Inc. Manufacturing system with intrinsically safe electric information storage
WO2015051198A1 (en) * 2013-10-03 2015-04-09 Fisher Controls International Llc Intrinsically safe voltage limiting shunt regulator circuit

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2724176B2 (en) * 1977-05-27 1979-06-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen DC power system
SE414357B (en) * 1978-08-17 1980-07-21 Asea Ab OVERVOLTAGE PROTECTION FOR PROTECTION OF SEMICONDUCTOR COMPONENTS OF LOW EFFECT TYPE
JPS57175543U (en) * 1981-04-28 1982-11-06
DE3541974A1 (en) * 1985-11-28 1987-06-04 Danfoss As PROTECTIVE CIRCUIT FOR THE INDUCTION COIL OF A MAGNETIC-INDUCTIVE FLOWMETER
DE4444345A1 (en) * 1994-12-14 1996-06-27 Stahl R Schaltgeraete Gmbh Security barrier for high data rates
CN114089230A (en) * 2021-10-27 2022-02-25 许继电源有限公司 Explosion-proof tool for inductance fault experiment

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1697859A2 (en) * 2003-12-01 2006-09-06 Advanced Technology Materials, Inc. Manufacturing system with intrinsically safe electric information storage
EP1697859A4 (en) * 2003-12-01 2009-07-08 Advanced Tech Materials Manufacturing system with intrinsically safe electric information storage
EP2431886A1 (en) * 2003-12-01 2012-03-21 Advanced Technology Materials, Inc. Manufacturing system with intrinsically safe electric information storage
CN101014949B (en) * 2003-12-01 2012-07-04 先科材料有限公司 Manufacturing system with intrinsically safe electric information storage
KR101186055B1 (en) 2003-12-01 2012-09-25 어드밴스드 테크놀러지 머티리얼즈, 인코포레이티드 Manufacturing system with intrinsically safe electric information storage
WO2015051198A1 (en) * 2013-10-03 2015-04-09 Fisher Controls International Llc Intrinsically safe voltage limiting shunt regulator circuit
CN104518505A (en) * 2013-10-03 2015-04-15 费希尔控制国际公司 Intrinsically safe voltage limiting shunt regulator circuit
US9343899B2 (en) 2013-10-03 2016-05-17 Fisher Controls International Llc Intrinsically safe voltage limiting shunt regulator circuit
US9768694B2 (en) 2013-10-03 2017-09-19 Fisher Controls International Llc Intrinsically safe voltage limiting shunt regulator circuit

Also Published As

Publication number Publication date
NL7502963A (en) 1975-09-30
IT1029395B (en) 1979-03-10
NL174512C (en) 1984-06-18
CA1029797A (en) 1978-04-18
FR2266346A1 (en) 1975-10-24
FR2266346B1 (en) 1981-08-21
DE2503226A1 (en) 1975-10-02
BE824798A (en) 1975-07-28
JPS50128156A (en) 1975-10-08
NL174512B (en) 1984-01-16

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Legal Events

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