SU120249A1 - Differential protection of electrical installations - Google Patents

Differential protection of electrical installations

Info

Publication number
SU120249A1
SU120249A1 SU598834A SU598834A SU120249A1 SU 120249 A1 SU120249 A1 SU 120249A1 SU 598834 A SU598834 A SU 598834A SU 598834 A SU598834 A SU 598834A SU 120249 A1 SU120249 A1 SU 120249A1
Authority
SU
USSR - Soviet Union
Prior art keywords
protection
circuit
electrical installations
differential protection
currents
Prior art date
Application number
SU598834A
Other languages
Russian (ru)
Inventor
Г.Т. Грек
Original Assignee
Г.Т. Грек
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 Г.Т. Грек filed Critical Г.Т. Грек
Priority to SU598834A priority Critical patent/SU120249A1/en
Application granted granted Critical
Publication of SU120249A1 publication Critical patent/SU120249A1/en

Links

Description

В электрических установках примен ют схемы дифференциальной защиты трансформаторов или шин, выполненные на выпр мленных токах с-о схемой сравнени , содержащей на выходе нульиндикатор и со.сто щей из двух контуров, включенных на дифференциальный и тормозной токи.In electrical installations, differential protection circuits of transformers or buses are used, made on rectified currents with a comparison circuit containing a numerical indicator at the output and consisting of two circuits connected to differential and braking currents.

Дл  отстройки от бросков токов намагничивани  или других токов, содержащих апериодическую слагающую, в известных защитах подобного рода используютс  нульиндикаторы с замедлител ми, уменьшающими быстродействие защиты или же со специальными блокировками, загрубл ющими защиту.For detuning from inrush currents of magnetization or other currents containing an aperiodic component, in known protections of this kind, null indicators are used with retarders that reduce protection performance or with special locks that degrade the protection.

Предлагаема  защита отличаетс  от известных тем, что в ней применено устройство, отфильтровывающее и выпр мл ющее слагающую тока небаланса, которое включено согласно в тормозной контур или встречно в рабочий контур.The proposed protection differs from the known ones in that it employs a device that filters and rectifies the component of the unbalance current, which is included according to the brake circuit or counter to the working circuit.

Такое выполнение защиты обеспечивает повышение ее быстродействи  и селективности.Such an embodiment of protection provides an increase in its speed and selectivity.

На чертеже изображена блок-схема предлагаемой защиты.The drawing shows a block diagram of the proposed protection.

Защита выполнена на выпр мленных токах и содержит схему сравнени  /, на выходе которой включен пульиндикатор.The protection is performed on rectified currents and contains a comparison circuit /, at the output of which the pulindicator is turned on.

Схема сравнени  состоит из двух контзфов рабочего и тормозного. Рабочий коптур 2 подключен через выпр митель 4 к цепи 5 дифференциального тока; тормозной контур 3 подключен через выпр мители 6 к цеп м фазных или других токов 7, осуществл ющих тормо.жение .The comparison circuit consists of two operating and brake contours. The working boiler 2 is connected via rectifier 4 to the circuit 5 of the differential current; brake circuit 3 is connected via rectifiers 6 to circuits of phase or other currents 7, which provide braking.

С целью отстройки защиты от токов небаланса, содержащих апериодическую составл ющую (броски токов намагничивани  и пр.), а также дл  уменьшени  времени срабатывани  защиты, из дифференциального тока выдел етс  посредством одного из известных устройств апериодичеXs 120249For the purpose of detuning the protection from unbalance currents containing an aperiodic component (inrush currents, etc.), as well as to reduce the response time of the protection, from the differential current is separated by one of the known aperiodic devices xs 120249

ека  слагающа , котора  выпр мл етс  выпр мителем 8 и вводитс  согласно в цепь тормозного контура 3 или встречно в цепь рабочего контура 2.A variable circuit that is rectified by rectifier 8 and is inserted according to the circuit of brake circuit 3 or counter to the circuit of working circuit 2.

Предмет изобретени Subject invention

Дифференциальна  защита электрических установок с применен15ем схемы сравнени  на выпр мленных токах, состо щей из рабочего и тормозного контуров, на выход которых включен нульиндикатор, отличающа с  тем, что, с целью ускорени  действи  защиты и повышени  ее селективности, в тормозной контур включено согласно или в рабочий контур встречно устройство, отфильтровывающее и выпр мл ющее апериодическую слагающую тока небаланса.Differential protection of electrical installations with the use of a comparison circuit on rectified currents consisting of operating and brake circuits, the output of which includes a numeric indicator, which, in order to accelerate the effect of protection and increase its selectivity, is included in the brake circuit according to or in the working circuit is a counter-device that filters and rectifies the aperiodic component of the unbalance current.

SU598834A 1958-05-04 1958-05-04 Differential protection of electrical installations SU120249A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU598834A SU120249A1 (en) 1958-05-04 1958-05-04 Differential protection of electrical installations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU598834A SU120249A1 (en) 1958-05-04 1958-05-04 Differential protection of electrical installations

Publications (1)

Publication Number Publication Date
SU120249A1 true SU120249A1 (en) 1958-11-30

Family

ID=48392140

Family Applications (1)

Application Number Title Priority Date Filing Date
SU598834A SU120249A1 (en) 1958-05-04 1958-05-04 Differential protection of electrical installations

Country Status (1)

Country Link
SU (1) SU120249A1 (en)

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