GB1343838A - Devices suitable for protecting loads in explosion-exposed spaces - Google Patents

Devices suitable for protecting loads in explosion-exposed spaces

Info

Publication number
GB1343838A
GB1343838A GB2561671A GB2561671A GB1343838A GB 1343838 A GB1343838 A GB 1343838A GB 2561671 A GB2561671 A GB 2561671A GB 2561671 A GB2561671 A GB 2561671A GB 1343838 A GB1343838 A GB 1343838A
Authority
GB
United Kingdom
Prior art keywords
explosion
devices suitable
exposed spaces
protecting
protecting loads
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
GB2561671A
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.)
ABB Training Center GmbH and Co KG
Original Assignee
Hartmann and Braun AG
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 Hartmann and Braun AG filed Critical Hartmann and Braun AG
Publication of GB1343838A publication Critical patent/GB1343838A/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

Abstract

1343838 Protective apparatus HARTMANN & BRAUN AG 19 April 1971 [24 April 1970] 25616/71 Addition to 1256780 Heading H2H Apparatus for protecting a load in an explosive atmosphere as disclosed in Specification 1,256,780 is modified such that the conductor 13 is connected to earth by way of two pairs 8, 9 and 8<SP>1</SP>, 9<SP>1</SP> of anti-parallel connected, semiconductor diodes. The two current limiting circuits 14, 14<SP>1</SP> are connected into the same conductor 12 and each circuit comprises a pair of transistors.
GB2561671A 1970-04-24 1971-04-19 Devices suitable for protecting loads in explosion-exposed spaces Expired GB1343838A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702019937 DE2019937B2 (en) 1970-04-24 1970-04-24 DEVICE TO PROTECT CONSUMERS AND / OR TRANSDUCERS IN EXPLOSION HAZARD AREAS

Publications (1)

Publication Number Publication Date
GB1343838A true GB1343838A (en) 1974-01-16

Family

ID=5769130

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2561671A Expired GB1343838A (en) 1970-04-24 1971-04-19 Devices suitable for protecting loads in explosion-exposed spaces

Country Status (4)

Country Link
DE (1) DE2019937B2 (en)
FR (1) FR2086298B2 (en)
GB (1) GB1343838A (en)
NL (1) NL7103093A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145858A (en) * 1983-08-27 1985-04-03 Hunslett Monitoring system
GB2183943A (en) * 1985-11-28 1987-06-10 Danfoss As Protective circuit for the field coil of an electromagnetic flow meter
GB2210521A (en) * 1987-09-26 1989-06-07 Measurement Tech Ltd Electrical safety barrier

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4963943A (en) * 1972-10-26 1974-06-20
JPS4984508A (en) * 1972-12-19 1974-08-14
JPS5069229U (en) * 1973-10-29 1975-06-19
JPS5245127U (en) * 1975-09-29 1977-03-30
US4053875A (en) * 1976-12-27 1977-10-11 Kupersmit Julius B Static charge detector having fail-safe voltage surge protection means
DE3322244A1 (en) * 1983-06-21 1985-01-10 Robert Bosch Gmbh, 7000 Stuttgart Intrinsically safe power source
DE3407800A1 (en) * 1984-03-02 1985-09-05 Brown, Boveri & Cie Ag, 6800 Mannheim ELECTRONIC SECURITY BARRIER
DE3622268C1 (en) * 1986-07-03 1988-02-11 Stahl R Schaltgeraete Gmbh Security barrier
JP2611481B2 (en) * 1990-03-08 1997-05-21 日本電気株式会社 Electronic device temperature abnormality detection circuit
US5823600A (en) * 1996-01-24 1998-10-20 Nissan Motor Co., Ltd. Noise insulating wall structure
DE102012111278B4 (en) 2012-11-22 2021-11-25 Wago Verwaltungsgesellschaft Mbh Circuit arrangement with overload protection for galvanic isolation units

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1288383A (en) * 1969-01-28 1972-09-06

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145858A (en) * 1983-08-27 1985-04-03 Hunslett Monitoring system
GB2183943A (en) * 1985-11-28 1987-06-10 Danfoss As Protective circuit for the field coil of an electromagnetic flow meter
GB2183943B (en) * 1985-11-28 1989-10-11 Danfoss As Protective circuit for the field coil of an electromagnetic flow meter
GB2210521A (en) * 1987-09-26 1989-06-07 Measurement Tech Ltd Electrical safety barrier
GB2210521B (en) * 1987-09-26 1992-04-29 Measurement Tech Ltd Electrical safety barriers

Also Published As

Publication number Publication date
NL7103093A (en) 1971-10-26
DE2019937A1 (en) 1971-11-04
DE2019937B2 (en) 1972-12-14
FR2086298A2 (en) 1971-12-31
FR2086298B2 (en) 1976-09-03

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Legal Events

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