[go: up one dir, main page]

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
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)

Abstract

1,256,780. Protective apparatus. HARTMANN & BRAUN A.G. 23 Dec., 1969 [23 Dec., 1968], No. 62565/69. Heading H2H. Protective apparatus for protecting a load in an explosive atmosphere from high voltage or heavy current comprises parallel Zener diodes 3, 4 and 3<SP>1</SP>, 4<SP>1</SP> connected between the electrical conductors and earth to limit the voltage which can be developed at the load 5 (or 6 or 7) in the explosive atmosphere and current limiting devices in each conductor, each of which comprises a transistor 8 which is normally of low impedance but which assumes a high impedance when the current tends to become excessive due to the Zener effect of a diode 9. The apparatus also includes fuses 2, 2<SP>1</SP>.
GB1256780D 1968-12-23 1969-12-23 Expired GB1256780A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681816553 DE1816553B2 (en) 1968-12-23 1968-12-23 DEVICE FOR THE PROTECTION OF CONSUMERS IN EXPLOSION HAZARD AREAS AND OR TRANSDUCERS

Publications (1)

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

Family

ID=5717190

Family Applications (1)

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

Country Status (4)

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

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
GB2145858A (en) * 1983-08-27 1985-04-03 Hunslett Monitoring system
EP0129965A3 (en) * 1983-04-29 1987-02-25 Weatherford/Lamb, Inc. Battery power pack
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 (en) * 1972-12-19 1974-08-14
JPS50113752A (en) * 1974-02-21 1975-09-06
DE2411633C3 (en) * 1974-03-12 1981-06-19 Brown, Boveri & Cie Ag, 6800 Mannheim Circuit arrangement for current limitation
DE2544482C3 (en) * 1975-10-04 1981-05-27 Brown, Boveri & Cie Ag, 6800 Mannheim Zener barrier consisting of a current and voltage limiting circuit
DE2917256A1 (en) * 1979-04-27 1980-11-06 Kraftwerk Union Ag OVERVOLTAGE PROTECTION DEVICE FOR ELECTRONIC DEVICES
DE2937298C2 (en) * 1979-09-12 1985-01-17 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Circuit arrangement for an intrinsically safe direct current supply

Cited By (9)

* 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
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
GB2210522B (en) * 1987-09-26 1992-04-29 Measurement Tech Ltd Electrical safety barriers
GB2245439B (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
NL6919066A (en) 1970-06-25
DE1816553B2 (en) 1971-09-30
DE1816553A1 (en) 1970-06-25
FR2026915A1 (en) 1970-09-25

Similar Documents

Publication Publication Date Title
GB1169706A (en) An Electrical Fault Detector
GB1089282A (en) Protection arrangement for telephone lines
GB1256780A (en)
GB1343838A (en) Devices suitable for protecting loads in explosion-exposed spaces
GB1019245A (en) Improvements in or relating to electrical overload protection apparatus
GB977913A (en) Improvements in or relating to electrical apparatus and systems
GB1031932A (en) A protective device for a super-conductor
CA718127A (en) Electronic direct current voltage regulator
GB1415534A (en) Safety devices in electrical appliances
CA716688A (en) Equipment for protecting electrical systems
GB966611A (en) Protective arrangements for electrical circuits and apparatus
GB1105368A (en) Method of testing bar conductors and coils of high-voltage machines
GB950183A (en) Improvements in and relating to electrical circuits employing transistor networks
ES313034A1 (en) Electrical systems for road vehicles
GB1288383A (en)
GB1292234A (en) Apparatus for protecting high voltage equipment from discharge damage
GB1323767A (en) Arrangement for the synthetic testing of the breaking capacity of high-voltage power circuit-breakers
GB907414A (en) Electric protective circuits
AT269260B (en) System of electrical line protection fuses of various nominal currents
AT269261B (en) System of electrical line protection fuses of various nominal currents
AU249217B2 (en) Electrical homopolar-type generators and current regulating circuit arrangements incorporating same
CA597743A (en) Magneto electric device and electrical connection and mounting therefor
AU6485460A (en) Electrical homopolar-type generators and current regulating circuit arrangements incorporating same
CA630846A (en) Coordinated circuit breaker and current limiting device
AU261800B2 (en) Electric generating circuit having an alternator and a voltage-current regulator

Legal Events

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