GB1256780A - - Google Patents

Info

Publication number
GB1256780A
GB1256780A GB1256780DA GB1256780A GB 1256780 A GB1256780 A GB 1256780A GB 1256780D A GB1256780D A GB 1256780DA GB 1256780 A GB1256780 A GB 1256780A
Authority
GB
United Kingdom
Prior art keywords
dec
load
explosive atmosphere
current
protective apparatus
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
Other languages
English (en)
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 filed Critical
Publication of GB1256780A publication Critical patent/GB1256780A/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)
GB1256780D 1968-12-23 1969-12-23 Expired GB1256780A (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681816553 DE1816553B2 (de) 1968-12-23 1968-12-23 Einrichtung zum schutze von in explosionsgefaehrdeten raeumen befindlichen verbrauchern und oder messwertgebern

Publications (1)

Publication Number Publication Date
GB1256780A true GB1256780A (sv) 1971-12-15

Family

ID=5717190

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1256780D Expired GB1256780A (sv) 1968-12-23 1969-12-23

Country Status (4)

Country Link
DE (1) DE1816553B2 (sv)
FR (1) FR2026915A1 (sv)
GB (1) GB1256780A (sv)
NL (1) NL6919066A (sv)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140231A (en) * 1983-04-29 1984-11-21 Weatherford Lamb Battery power pack
EP0129965A2 (en) * 1983-04-29 1985-01-02 Weatherford/Lamb, Inc. Battery power pack
GB2145858A (en) * 1983-08-27 1985-04-03 Hunslett Monitoring system
GB2210521A (en) * 1987-09-26 1989-06-07 Measurement Tech Ltd Electrical safety barrier
GB2210522A (en) * 1987-09-26 1989-06-07 Measurement Tech Ltd Electrical safety barrier
GB2245439A (en) * 1987-09-26 1992-01-02 Measurement Tech Ltd Electrical safety barriers

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4984508A (sv) * 1972-12-19 1974-08-14
JPS50113752A (sv) * 1974-02-21 1975-09-06
DE2411633C3 (de) * 1974-03-12 1981-06-19 Brown, Boveri & Cie Ag, 6800 Mannheim Schaltungsanordnung zur Strombegrenzung
DE2544482C3 (de) * 1975-10-04 1981-05-27 Brown, Boveri & Cie Ag, 6800 Mannheim Aus einer Strom- und Spannungsbegrenzungsschaltung bestehende Zenerbarriere
DE2917256A1 (de) * 1979-04-27 1980-11-06 Kraftwerk Union Ag Ueberspannungsschutzeinrichtung fuer elektronische geraete
DE2937298C2 (de) * 1979-09-12 1985-01-17 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung für eine eigensichere Gleichstrom-Versorgung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140231A (en) * 1983-04-29 1984-11-21 Weatherford Lamb Battery power pack
EP0129965A2 (en) * 1983-04-29 1985-01-02 Weatherford/Lamb, Inc. Battery power pack
EP0129965A3 (en) * 1983-04-29 1987-02-25 Weatherford/Lamb, Inc. Battery power pack
GB2145858A (en) * 1983-08-27 1985-04-03 Hunslett Monitoring system
GB2210521A (en) * 1987-09-26 1989-06-07 Measurement Tech Ltd Electrical safety barrier
GB2210522A (en) * 1987-09-26 1989-06-07 Measurement Tech Ltd Electrical safety barrier
GB2245439A (en) * 1987-09-26 1992-01-02 Measurement Tech Ltd Electrical safety barriers
GB2245439B (en) * 1987-09-26 1992-04-29 Measurement Tech Ltd Electrical safety barriers
GB2210522B (en) * 1987-09-26 1992-04-29 Measurement Tech Ltd Electrical safety barriers
GB2210521B (en) * 1987-09-26 1992-04-29 Measurement Tech Ltd Electrical safety barriers

Also Published As

Publication number Publication date
DE1816553B2 (de) 1971-09-30
NL6919066A (sv) 1970-06-25
FR2026915A1 (sv) 1970-09-25
DE1816553A1 (de) 1970-06-25

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Legal Events

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