SE9802181L - Protective device and method - Google Patents

Protective device and method

Info

Publication number
SE9802181L
SE9802181L SE9802181A SE9802181A SE9802181L SE 9802181 L SE9802181 L SE 9802181L SE 9802181 A SE9802181 A SE 9802181A SE 9802181 A SE9802181 A SE 9802181A SE 9802181 L SE9802181 L SE 9802181L
Authority
SE
Sweden
Prior art keywords
closing unit
overcurrent
arrangement
closing
activated
Prior art date
Application number
SE9802181A
Other languages
Swedish (sv)
Other versions
SE9802181D0 (en
Inventor
Bertil Berggren
Marie Sundin
Original Assignee
Abb Ab
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 Abb Ab filed Critical Abb Ab
Priority to SE9802181A priority Critical patent/SE9802181L/en
Publication of SE9802181D0 publication Critical patent/SE9802181D0/en
Priority to PCT/SE1999/001098 priority patent/WO1999066618A1/en
Priority to AU48158/99A priority patent/AU4815899A/en
Publication of SE9802181L publication Critical patent/SE9802181L/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T2/00—Spark gaps comprising auxiliary triggering means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/083—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for three-phase systems

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

Several electric closing units (9) with two units (9a,9b) are provided. The closing unit (9a) is connected between respective phase conductors (R,S,T) and ground (13). The closing unit (9b) is connected between a zero point (3) of multiphase object (1) and ground (13). The closing unit is activated for overcurrent diversion within a period shorter than breaking time of switches (6). - The overcurrent reducing arrangement (7) is activated for overcurrent reduction with assistance of an arrangement (8) detecting overcurrent conditions. The object is formed by an electrical apparatus having a magnetic circuit. A control unit (10) connected to the closing unit and the arrangement (8), detects overcurrent conditions and controls the closing unit to close when required, for protection. An INDEPENDENT CLAIM is also included for method of protecting objects in multiphase electric power plant.
SE9802181A 1998-06-17 1998-06-17 Protective device and method SE9802181L (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9802181A SE9802181L (en) 1998-06-17 1998-06-17 Protective device and method
PCT/SE1999/001098 WO1999066618A1 (en) 1998-06-17 1999-06-17 A protection device and method
AU48158/99A AU4815899A (en) 1998-06-17 1999-06-17 A protection device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9802181A SE9802181L (en) 1998-06-17 1998-06-17 Protective device and method

Publications (2)

Publication Number Publication Date
SE9802181D0 SE9802181D0 (en) 1998-06-17
SE9802181L true SE9802181L (en) 1999-12-18

Family

ID=20411761

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9802181A SE9802181L (en) 1998-06-17 1998-06-17 Protective device and method

Country Status (1)

Country Link
SE (1) SE9802181L (en)

Also Published As

Publication number Publication date
SE9802181D0 (en) 1998-06-17

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