ZA773809B - Improvements in or relating to flameproof,totally enclosed,switching device combinations,particularly for underground mining - Google Patents

Improvements in or relating to flameproof,totally enclosed,switching device combinations,particularly for underground mining

Info

Publication number
ZA773809B
ZA773809B ZA00773809A ZA773809A ZA773809B ZA 773809 B ZA773809 B ZA 773809B ZA 00773809 A ZA00773809 A ZA 00773809A ZA 773809 A ZA773809 A ZA 773809A ZA 773809 B ZA773809 B ZA 773809B
Authority
ZA
South Africa
Prior art keywords
flameproof
relating
switching device
totally enclosed
underground mining
Prior art date
Application number
ZA00773809A
Other languages
English (en)
Inventor
K Raschke
D Hidde
Original Assignee
Siemens 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 Siemens Ag filed Critical Siemens Ag
Publication of ZA773809B publication Critical patent/ZA773809B/xx

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/04—Distributing means for power supply in mines
    • E21F17/06—Distributing electric power; Cable networks; Conduits for cables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/40—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect
    • G01R13/404—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Breakers (AREA)
  • Distribution Board (AREA)
  • Measuring Fluid Pressure (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
ZA00773809A 1976-06-25 1977-06-24 Improvements in or relating to flameproof,totally enclosed,switching device combinations,particularly for underground mining ZA773809B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2629226A DE2629226C3 (de) 1976-06-25 1976-06-25 Meßeinrichtung bei druckfest gekapselten Schaltgerätekombinationen

Publications (1)

Publication Number Publication Date
ZA773809B true ZA773809B (en) 1979-04-25

Family

ID=5981776

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00773809A ZA773809B (en) 1976-06-25 1977-06-24 Improvements in or relating to flameproof,totally enclosed,switching device combinations,particularly for underground mining

Country Status (4)

Country Link
DE (1) DE2629226C3 (xx)
FR (1) FR2356145A1 (xx)
GB (1) GB1545187A (xx)
ZA (1) ZA773809B (xx)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008974C2 (de) * 1980-03-08 1985-10-03 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Elektrische Steuereinrichtung für untertägige Strebausbaugestelle
DE3035835C2 (de) * 1980-09-19 1989-02-23 Siemens AG, 1000 Berlin und 8000 München Druckfestes Gehäuse mit einem rechteckigen Deckel

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501345A (en) * 1947-06-02 1950-03-21 Westinghouse Electric Corp Metal-clad switchgear
FR1259268A (fr) * 1960-06-09 1961-04-21 Heliowatt Werke Elek Zitats Ag Monture destinée aux regards vitrés des boîtiers d'appareillages électriques ou appareils équivalents
FR1354661A (fr) * 1963-04-24 1964-03-06 Bassani Spa Appareil électriques à boîte extérieure à fermeture hermétique, plus particulièrement pour installations à l'air libre
GB1374991A (en) * 1971-03-25 1974-11-20 Vernon Instr Co Ltd Signal indicator systems
DE2242974A1 (de) * 1972-08-31 1974-03-21 Siemens Ag Mit elektrischen geraeten bestuecktes druckfestes gehaeuse
DE2242973C3 (de) * 1972-08-31 1978-08-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Druckfestes Gehäuse zur Aufnahme elektrischer Geräte
US3885230A (en) * 1973-05-24 1975-05-20 Marconi Co Canada System for improving the reliability of indicator arrangements
DE2331660B2 (de) * 1973-06-22 1977-02-03 Robert Bosch Gmbh, 7000 Stuttgart Schaltungsanordnung zur anzeige einer gleichspannung mittels elektro- optischer anzeigeelemente
AT342123B (de) * 1974-02-05 1978-03-10 Siemens Ag Oesterreich Schaltung fur eine als anzeigeeinheit dienende kette von leuchtdioden
DE2409995B2 (de) * 1974-02-28 1980-06-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen Anzeigevorrichtung fur wechselnde Schaltzustände einer gekapselten Kombination elektrischer Schaltgeräte
GB1489072A (en) * 1975-02-17 1977-10-19 Ind Control Services Ltd Intrinsically safe systems

Also Published As

Publication number Publication date
DE2629226C3 (de) 1981-02-19
GB1545187A (en) 1979-05-02
FR2356145B1 (xx) 1982-02-19
DE2629226B2 (de) 1978-04-27
DE2629226A1 (de) 1977-12-29
FR2356145A1 (fr) 1978-01-20

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