SE9003754L - PROTECTIVE DEVICE FOR ELECTRICAL STEELWORKS AND CENTERS - Google Patents

PROTECTIVE DEVICE FOR ELECTRICAL STEELWORKS AND CENTERS

Info

Publication number
SE9003754L
SE9003754L SE9003754A SE9003754A SE9003754L SE 9003754 L SE9003754 L SE 9003754L SE 9003754 A SE9003754 A SE 9003754A SE 9003754 A SE9003754 A SE 9003754A SE 9003754 L SE9003754 L SE 9003754L
Authority
SE
Sweden
Prior art keywords
transformer
low
secondary side
protective device
fuse
Prior art date
Application number
SE9003754A
Other languages
Swedish (sv)
Other versions
SE467517B (en
SE9003754D0 (en
Inventor
Kjell Brenden
Original Assignee
Kjell Brenden
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 Kjell Brenden filed Critical Kjell Brenden
Priority to SE9003754A priority Critical patent/SE467517B/en
Publication of SE9003754D0 publication Critical patent/SE9003754D0/en
Priority to NO914600A priority patent/NO301397B1/en
Publication of SE9003754L publication Critical patent/SE9003754L/en
Publication of SE467517B publication Critical patent/SE467517B/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Static Devices (AREA)

Abstract

A protective device for electrical switchgear and exchanges comprises a transformer 7, the primary side of which is connected to high voltage via a load isolator 2, fuse 3 and earthing switch 4 and the secondary side of which comprises the low voltage side connected to a low-voltage distribution network 12. The low-voltage distribution network is so arranged that in the event of faults 14, 15 in the collecting bar of the switchgear or in the group cable 16, the faulty current automatically cuts out or the fuse in the cable blows within a predetermined time when faulty currents in the secondary side of the transformer are less than a predetermined threshold value. A current transformer 9 is arranged to detect short-circuit currents on the secondary side of the transformer 7 and when these exceed the abovementioned threshold value to cause the load isolator on the high voltage side to open or the earthing switch to close. <IMAGE>
SE9003754A 1990-11-26 1990-11-26 Protective device for electrical switchgear and exchanges SE467517B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9003754A SE467517B (en) 1990-11-26 1990-11-26 Protective device for electrical switchgear and exchanges
NO914600A NO301397B1 (en) 1990-11-26 1991-11-25 Protection device for electrical distribution systems and switchboards

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9003754A SE467517B (en) 1990-11-26 1990-11-26 Protective device for electrical switchgear and exchanges

Publications (3)

Publication Number Publication Date
SE9003754D0 SE9003754D0 (en) 1990-11-26
SE9003754L true SE9003754L (en) 1992-05-27
SE467517B SE467517B (en) 1992-07-27

Family

ID=20381008

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9003754A SE467517B (en) 1990-11-26 1990-11-26 Protective device for electrical switchgear and exchanges

Country Status (2)

Country Link
NO (1) NO301397B1 (en)
SE (1) SE467517B (en)

Also Published As

Publication number Publication date
NO914600L (en) 1992-05-27
NO914600D0 (en) 1991-11-25
SE467517B (en) 1992-07-27
NO301397B1 (en) 1997-10-20
SE9003754D0 (en) 1990-11-26

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