SU1492410A1

SU1492410A1 - Device for failure protection in electrical installations

Info

Publication number: SU1492410A1
Application number: SU864166456A
Authority: SU
Inventors: Сергей Александрович Демушкин; Александр Сергеевич Лебедев
Original assignee: Предприятие П/Я В-2942
Priority date: 1986-12-22
Filing date: 1986-12-22
Publication date: 1989-07-07

Abstract

Изобретение относитс к области электротехники, в частности к релейной защите. Цель изобретени - повышение надежности. В случае пропадани контрольного напр жени в паузе между импульсами с формировател 1 соответствующий тиристор закрываетс , исполнительный орган 3 отключаетс . 1 ил.This invention relates to the field of electrical engineering, in particular, to relay protection. The purpose of the invention is to increase reliability. In the case of the disappearance of the control voltage in the pause between the pulses from the driver 1, the corresponding thyristor is closed, the executive authority 3 is turned off. 1 il.

Description

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Изобретение относитс к области защиты электрических линий многофазных цепей и цепей посто нного тока от обрыва проводов.This invention relates to the field of protecting electric lines of multiphase circuits and direct current circuits against wire breaks.

Цель изобретени - повьппение надежности .The purpose of the invention is reliability.

На чертеже представлена функциональна схема устройства.The drawing shows the functional diagram of the device.

Устройство содержит последователь- но соединенные формирователь 1 пр моугольных импульсов, тиристорные опт- роны 2 и исполнительный орган 3. Управл ющие цепи оптронов через соот- ветствунщие ограничиваюцие резисто- ры 4 и 5 подключены между соответствующей фазой или контролируемой цепью посто нного тока и обпщм проводом. Выпр митель 6 подключен к вторичной обмотке трансформатора 7,The device contains successively connected rectangular pulse shaper 1, thyristor optrons 2 and executive unit 3. The control circuits of the optocouplers are connected to the corresponding limiting resistors 4 and 5 between the corresponding phase or controlled DC circuit and the main wire . Rectifier 6 is connected to the secondary winding of the transformer 7,

Устройство работает следующим образом.The device works as follows.

При наличии всех контролируемых сигналов тиристоры оптронов 2 замыкают цепь между формирователем 1 и исполнительным органом 3. В случае пропадани контролируемого напр жени , в паузе между импульсами с формировател 1 соответствующий тиристор закрываетс , разрыва цепь между формирователем 1 и исполнительным органом 3.In the presence of all monitored signals, the thyristors of the optocouplers 2 close the circuit between the driver 1 and the executive body 3. In the case of a monitored voltage loss, the corresponding thyristor closes between the pulses from the driver 1 and the circuit between the driver 1 and the executive body 3.

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Claims

The duty cycle of the pulses at the output of the imaging unit 1 is chosen such that, with the open thyristors of the optocouplers 2, the executive unit 3 is in the actuated state. Invention Formula

A device for protecting electrical installations from accidents, containing a circuit of series-connected thyristor optocouplers, one of the control terminals of which is connected to the corresponding limiting resistor, and an actuator, a rectifier connected to the secondary winding of the transformer, the primary winding of which is connected to the terminals for connection to one of the phases of a multiphase network and a common bus, characterized in that, in order to increase reliability, a pulse shaper is introduced into it, and free conclusions are restricted their resistors are connected to the terminals for connecting to the corresponding phases of the multiphase network and the DC power source, other thyristor optocoupler terminals are connected to the terminal for connecting to the common bus, successively connected thyristor optocouplers and the actuator are connected via a pulse shaper to the terminal.