SU898546A1 - Device for protecting steel-armoured metal-sheathed cable from earthing - Google Patents

Device for protecting steel-armoured metal-sheathed cable from earthing Download PDF

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Publication number
SU898546A1
SU898546A1 SU792730534A SU2730534A SU898546A1 SU 898546 A1 SU898546 A1 SU 898546A1 SU 792730534 A SU792730534 A SU 792730534A SU 2730534 A SU2730534 A SU 2730534A SU 898546 A1 SU898546 A1 SU 898546A1
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SU
USSR - Soviet Union
Prior art keywords
cable
earthing
circuit
armor
sheathed cable
Prior art date
Application number
SU792730534A
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Russian (ru)
Inventor
Евгений Иванович Загоскин
Original Assignee
Центральная Лаборатория И Экспериментальные Мастерские Тулэнерго
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Priority to SU792730534A priority Critical patent/SU898546A1/en
Application granted granted Critical
Publication of SU898546A1 publication Critical patent/SU898546A1/en

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Description

(5А) УСТРОЙСТВО дл  ЗАЩИТЫ КАБЕЛЯ СО СТАЛЬНОЙ(5A) DEVICE FOR PROTECTION OF THE CABLE WITH STEEL

БРОНЕЙ И МЕТАЛЛИЧЕСКОЙ ОБОЛОЧКОЙ ОТ ЗАМЫКАНИЯARMS AND METAL SHUTTINGS

II

Изобретение относитс  к электротехнике и может быть использовано дл  защиты кабельной линии электропередачиоThe invention relates to electrical engineering and can be used to protect a cable power line.

Известны устойства дл  защиты кабел  от замыкани  на землю, содержащие включенный в цепь кабел  трансформатор тока нулевой последовательности , к выходу которого присоединен вход реагирующего органа, выход последнего соединен с цеп ми отключени  выключател  защищаемого кабел р ,There are known devices for protecting a cable against earth fault, containing a zero-sequence current transformer connected to the cable circuit, to the output of which the input of the reacting element is connected, the output of the latter is connected to the tripping circuit of the switch of the protected cable p,

Недостатком данного устойства  в- л етс  невысока  чувствительность, определ ема  необходимостью отстройки от бросков тока кабел  и небаланса трансформатора.The disadvantage of this device is its low sensitivity, which is determined by the need to detun the cable from inrush current and the unbalance of the transformer.

Наиболее близким по технической сущности к предлагаемому  вл етс  устройство дл  защиты электрического аппарата от замыкани  на корпус, содержащее выключатель в цепи защищаемого аппарата и реагирующий орган, вход которого включен между корпусомThe closest in technical essence to the present invention is a device for protecting an electrical apparatus from closing to the housing, comprising a switch in the circuit of the protected apparatus and a reacting organ, the input of which is connected between the housing

НА ЗЕМЛЮTO THE GROUND

аппарата и контуром заземлени , выход реагирующего органа присоединен к цеп м отключател  2.the apparatus and the ground loop, the output of the reacting organ is connected to the circuit of the switch 2.

Недостатком известного устройства  вл етс  также невысока  чувствительность , не позвол юща  осуществл ть резервирование защит от замыкани  t на землю в цеп х приемников.A disadvantage of the known device is also the low sensitivity, which does not allow for the implementation of redundancy of t-ground protection in the receiver circuits.

Цель изобретени  - повышение чувствительности .The purpose of the invention is to increase the sensitivity.

Указанна  цель достигаетс  тем, что в устройстве дл  защиты кабел  со стальной броней и металлической оболочкой, содержащем проводник, замыкающий оболочку и броню в конце кабел  с контуром заземлени , выключатель в цепи защищаемого кабел , реагирующий орган, первый полюс входа которого присоединен к броне и контуру заземлени , а выход при соединен к цеп м отключени  выключател , вто-рой полюс входа реагирующего органа присоединен к металлической оболочке и нулевой жиле в начале кабел .This goal is achieved by the fact that in a device for protecting a cable with steel armor and a metal sheath containing a conductor closing the sheath and armor at the end of the cable with a ground loop, a switch in the circuit of the protected cable, a reacting organ, the first pole of which is connected to the armor and the circuit. grounding, and the output when connected to the circuit breaker circuit breaker, the second pole of the input of the reactive body is attached to the metal sheath and zero conductor at the beginning of the cable.

Claims (1)

Устройство для защиты кабеля со стальной броней и металлической оболочкой от замыкания на землю, содержащее проводник, замыкающий оболочку и броню в конце кабеля с контуром заземления, выключатель в цепи защищаемого кабеля, реагирующий орган, первый полюс входа которого присоединен к броне и контуру заземления, а выход присоединен к цепям отключения выключателя, отличающееся тем, что, с целью повышения чувствительности, второй полюс входа реагирующего органа присоединен к металлической оболочке и нулевой жиле в начале кабеля.A device for protecting a cable with steel armor and a metal sheath from earth faults, containing a conductor, a closing sheath and armor at the end of the cable with an earthing circuit, a switch in the circuit of the protected cable, a reactive organ, the first input pole of which is connected to the armor and an earthing circuit, and the output is connected to the circuit breaker, characterized in that, in order to increase sensitivity, the second pole of the input of the reacting organ is connected to the metal sheath and the zero core at the beginning of the cable.
SU792730534A 1979-02-28 1979-02-28 Device for protecting steel-armoured metal-sheathed cable from earthing SU898546A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU792730534A SU898546A1 (en) 1979-02-28 1979-02-28 Device for protecting steel-armoured metal-sheathed cable from earthing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU792730534A SU898546A1 (en) 1979-02-28 1979-02-28 Device for protecting steel-armoured metal-sheathed cable from earthing

Publications (1)

Publication Number Publication Date
SU898546A1 true SU898546A1 (en) 1982-01-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU792730534A SU898546A1 (en) 1979-02-28 1979-02-28 Device for protecting steel-armoured metal-sheathed cable from earthing

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG90267A1 (en) * 2000-11-10 2002-07-23 Sumitomo Electric Industries Power cable line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG90267A1 (en) * 2000-11-10 2002-07-23 Sumitomo Electric Industries Power cable line

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