RU2005136040A - METHOD OF PROTECTION AGAINST SINGLE-PHASE CIRCUIT TO THE EARTH OF A MULTI-CABLE LINE IN AN ELECTRIC AC VOLTAGE NETWORK - Google Patents

METHOD OF PROTECTION AGAINST SINGLE-PHASE CIRCUIT TO THE EARTH OF A MULTI-CABLE LINE IN AN ELECTRIC AC VOLTAGE NETWORK Download PDF

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Publication number
RU2005136040A
RU2005136040A RU2005136040/09A RU2005136040A RU2005136040A RU 2005136040 A RU2005136040 A RU 2005136040A RU 2005136040/09 A RU2005136040/09 A RU 2005136040/09A RU 2005136040 A RU2005136040 A RU 2005136040A RU 2005136040 A RU2005136040 A RU 2005136040A
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RU
Russia
Prior art keywords
cable line
earth
electric
protection against
phase circuit
Prior art date
Application number
RU2005136040/09A
Other languages
Russian (ru)
Other versions
RU2312442C2 (en
Inventor
Владимир Иванович Кашкалов (UA)
Владимир Иванович Кашкалов
Original Assignee
Открытое акционерное общество "Мариупольский металлургический комбинат им. Ильича" (UA)
Открытое Акционерное Общество "Мариупольский Металлургический Комбинат Им. Ильича"
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Application filed by Открытое акционерное общество "Мариупольский металлургический комбинат им. Ильича" (UA), Открытое Акционерное Общество "Мариупольский Металлургический Комбинат Им. Ильича" filed Critical Открытое акционерное общество "Мариупольский металлургический комбинат им. Ильича" (UA)
Publication of RU2005136040A publication Critical patent/RU2005136040A/en
Application granted granted Critical
Publication of RU2312442C2 publication Critical patent/RU2312442C2/en

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  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Locating Faults (AREA)

Claims (1)

Способ защиты от однофазного замыкания на землю многокабельной линии в электрической сети переменного напряжения с изолированной нетралью, основанный на измерении токов нулевой последовательности кабелей защищаемой линии и выдаче сигнала о происшедшем однофазном замыкании на землю, отличающийся тем, что сравнивают токи нулевой последовательности каждого кабеля защищаемой многокабельной линии и по тому току, который наиболее отличается от остальных токов, определяют как поврежденный кабель, на котором произошло однофазное замыкание на землю, так и поврежденную линию в целом.A method of protecting against a single-phase earth fault of a multi-cable line in an alternating voltage electrical network with insulated non-ground, based on measuring the zero-sequence currents of the cables of the protected line and issuing a signal about the occurrence of a single-phase earth fault, characterized in that the zero-sequence currents of each cable of the protected multi-cable line are compared and according to the current that is most different from the rest of the currents, it is determined as a damaged cable, on which a single-phase short circuit has occurred on the ground and damaged the line as a whole.
RU2005136040/09A 2004-12-23 2005-11-21 Method for protecting multiple-cable line of alternating-voltage network against single-phase ground fault RU2312442C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
UA20041210625A UA76360C2 (en) 2004-12-23 2004-12-23 Method for detecting single-phase ground short circuit in a cable multiwire line of an alternating-current isolated neutral system
UA20041210625 2004-12-23

Publications (2)

Publication Number Publication Date
RU2005136040A true RU2005136040A (en) 2007-06-10
RU2312442C2 RU2312442C2 (en) 2007-12-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
RU2005136040/09A RU2312442C2 (en) 2004-12-23 2005-11-21 Method for protecting multiple-cable line of alternating-voltage network against single-phase ground fault

Country Status (2)

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RU (1) RU2312442C2 (en)
UA (1) UA76360C2 (en)

Also Published As

Publication number Publication date
UA76360C2 (en) 2006-07-17
RU2312442C2 (en) 2007-12-10

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MM4A The patent is invalid due to non-payment of fees

Effective date: 20091122