GB1470270A - Redundant intrinsically safe electrical barrier - Google Patents
Redundant intrinsically safe electrical barrierInfo
- 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
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.
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)
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)
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 |
-
1975
- 1975-01-07 GB GB67775A patent/GB1470270A/en not_active Expired
- 1975-01-07 CA CA217,531A patent/CA1029797A/en not_active Expired
- 1975-01-27 DE DE19752503226 patent/DE2503226A1/en not_active Ceased
- 1975-01-27 BE BE1006426A patent/BE824798A/en not_active IP Right Cessation
- 1975-01-30 JP JP1291975A patent/JPS50128156A/ja active Pending
- 1975-01-30 IT IT4791375A patent/IT1029395B/en active
- 1975-03-11 FR FR7507559A patent/FR2266346B1/fr not_active Expired
- 1975-03-12 NL NL7502963A patent/NL174512C/en not_active IP Right Cessation
Cited By (9)
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 |