SU691823A1

SU691823A1 - System for protecting a group of stabilizers having a common output bus

Info

Publication number: SU691823A1
Application number: SU772505093A
Authority: SU
Inventors: Виктор Иванович Сорокин
Original assignee: Предприятие П/Я Г-4152
Priority date: 1977-07-05
Filing date: 1977-07-05
Publication date: 1979-10-15

Description

(54) УСТРОЙСТВО ДЛЯ ЗАЩИТЫ ГРУППЫ СТАБИЛИЗАТОРОВ С ОБЩЕЙ ВЫХОДНОЙ ШИНОЙ(54) DEVICE FOR PROTECTION OF A GROUP OF STABILIZERS WITH A COMMON OUTPUT BUS

Изобретение относитс к электротехнике и может 6biT|j использовано дл защиты вторичных источников питани радиоэлектронной аппаратуры.;The invention relates to electrical engineering and can 6biT | j be used to protect secondary power sources of electronic equipment .;

Известны устройства дл защиты группы стабилизаторов от перегрузок По току и потребителей от перенапр жений 1, 2.Devices are known for protecting a group of stabilizers against overloads Over current and consumers against overvoltages 1, 2.

Одно из известных устройств содержит по числу стабилизаторов каналы защиты, каждый из которых состоит из датчика перегрузки по току, датчика перенапр жени , усилител На транзисторе, в коллекторную цепь которого включена обмотка реле, и коммутируемое контактами азанных реле каналов зашиты общее исполнительное реле, контакты которого служат дл отключени питающей стабилизаторы сети (1.One of the known devices contains, by the number of stabilizers, protection channels, each of which consists of an overcurrent sensor, an overvoltage sensor, an amplifier. A transistor in the collector circuit of which a relay winding is connected and the commutator is connected by contacts are used to disconnect the supply network stabilizers (1.

Недостатком известного устройства вл етс мала надежность и сложность.A disadvantage of the known device is low reliability and complexity.

Другое ИЗ известных устройств, вл ющеес наиболее близким техническим реше. ннем к данному изобретению, содержит по числу стабилизаторов каналы защиты, каждый из которых состоит из датчика перегрузки по току, датчика перенапр жени , усилител на транзисторе, в коллекторную цепь которого включена обмотка реле, двух диодов, один из которых подключен катодом к коллектору транзистора усилител , а анодом - через замыкающий контакт реле - к общей щине и аноду другого диода , а общее дл всех каналов защиты исполнительное реле, размыкающий контакт которого служит дл отключени пиAnother OF the known devices, which is the closest technical solutions. This invention contains, by the number of stabilizers, protection channels, each of which consists of an overcurrent sensor, an overvoltage sensor, an amplifier on a transistor, the collector circuit of which includes a relay winding, two diodes, one of which is connected by a cathode to the collector of an amplifier transistor and the anode, through the closing contact of the relay, to the common bus bar and the anode of another diode, and the executive relay common to all protection channels, the breaker contact of which serves to switch off

так)щей стабилизаторы сети, первый вывод обмотки подключён к катоду другого диода каждого из каналов заЩитЫ, второй вывод - к исФочнйку питани устрюйстваso) network stabilizers, the first winding pin is connected to the cathode of the other diode of each of the protection channels, the second pin is connected to the power supply of the device

защиты 2.protection 2.

Известное устройство снимает сетевое напр жение с группы защищаемых им стабилизаторов при их перегрузке по току или перенапр жении на выходе стабилизатора. Дл выдачи адреса неисправного канала питани после отключени сетевогоThe known device removes the mains voltage from the group of stabilizers it protects when they are overloaded by current or overvoltage at the output of the stabilizer. To issue the address of the faulty power channel after disconnecting the network

напр жени управление исполнительным осуществл етс с помощью контактов реле , включенных в коллекторную цепь транзисторов усилителей, которые после их срабатывани устанавливаютс в режим самоблокировки .Voltage executive control is carried out using the relay contacts included in the collector circuit of the transistors of the amplifiers, which after their operation are set to the self-blocking mode.

Недостаток известного устройства заключаетс в том, что любое однократное замыкание контактов реле в каком-либо из каналов , защиты, длительность которого доста точна Г дл срабатывани реле, неизбежноA disadvantage of the known device is that any one-time closure of the relay contacts in any of the channels, protection, the duration of which is sufficient for G to activate the relay, is inevitable

Приведёт к отключению сетевого напр жени с защищаемой группы стабилизаторов. Это может быть причиной срабатывани защиты при отсутствии аварийного режима (всистем.е электропитани , что снижает надежность работы устройства.Disable the mains voltage from the protected stabilizer group. This may cause the protection to operate in the absence of an emergency mode (in the power system, which reduces the reliability of the device.

Целью изобретени вл етс повьтшение надежности работы устройства.- :The aim of the invention is to increase the reliability of the device. -:

Поставленна цель достигаетс тем, что в устройство дл защиты группы стаби.пизаторов , содержащее по числу стабилизаторов каналы защиты, каждый из которых состоит из датчика перегрузки по току, датчика перенапр жени , усилител на транзИсторе , в коллекторную цеп ь которого включена обмотка реле, двух диодов, одич из которых подключен катодом к кЬллёк1-ОруThe goal is achieved by the fact that a device for protection of a group of stabilizers, which by the number of stabilizers contains protection channels, each of which consists of an overcurrent sensor, an overvoltage sensor, an amplifier on the transistor, in the collector circuit of which a winding relay is connected diodes, the wild of which is connected by a cathode to kllyok1-Oru

транзистора усилител , анодом - через замыкающий контакт реле - к общей шине и аноду другого диода, и оби ёёдл всех каналов защиты исполнительного реле, размыкающий контакт которого служит дл отключени питающей стабилизаторы сети,, первый вывод обмотки подключен-к катоду другого диода каждого из каналов защиты, второй, вывод - к источнику питани устройства защиты, дополнительно введены диод , первый и второй резист6ры7 ковденсатор И дополнительное реле; причем анод диода подключен к.первому выводу обмотки.исполнительного реле, катод - через параллельно соединенные конденсатор и первый резистор - к одному выводу второго резистора и обмотки дополнительного реле, друюй вывод которой подключен к источнику питани устройства защиты, который через размыкающий контайт дополнительного реле соединен с обмотками реле каналов , а через здмьи ающий контакт - с дру-;the amplifier transistor, the anode through the closing contact of the relay to the common bus and the anode of another diode, and the combined path of all protection channels of the executive relay, the disconnecting contact of which serves to disconnect the supply stabilizers of the network, the first winding pin connected to the cathode of the other diode of each channel protection, the second, output - to the power supply of the protection device; a diode is additionally introduced; the first and second resistors are connected; AND an additional relay; the diode anode is connected to the first winding terminal of the executive relay, the cathode through a parallel-connected capacitor and the first resistor to one output of the second resistor and the winding of the auxiliary relay, the other output of which is connected to the power supply of the protection device, which is connected via the open count of the additional relay with the windings of the relay channels, and through the living contact - with the other;

fим вЕлйойомвторого резистора. :;,: . На чертеже представлена принЦипИаЛЬна схема устройства, выполненна сОглас-; но данному изобретению....., - ,fim is the second resistor. :;,: The drawing shows the PRINCIPLE scheme of the device, made with the Public; but this invention ....., -,

Устройство дл защиты содержит групг пу независимых друг от друга Каналов защитн; количество которых равно коли1}еству защищаемых стабилизаторов 1 ...1..КаЖ7 дый канал защиты состоит из усилител на транзисторе 2, реле 3 с замыкаю1цими конактами , диодов 4 и 5 и; сигнальной лампы 6, Управление состо нием Ароводимбсти -уси-; лй 1ёЛ5Г Ot5 ЩёетвЛ е с с датчика перегрузки по току 7 и датчика перенапр жени 8. Диоды 5 всех каналов защитыобразуют схему ИЛИ, через которую осуществл етс поДача напр жени от источника .питани устройства защиты с напр жением обмотку исполнительного реле 9 и схему автоматического выключени и повторного включени питани на каналы защиты при замыкании в них контактов реле, котора состоит из дополнительного реле 10 с переклю-,The device for protection contains groups of independent of each other Channels of protection; the number of which is equal to the number of protected stabilizers 1 ... 1.. The protection channel consists of an amplifier with a transistor 2, a relay 3 with short-circuiting, diodes 4 and 5 and; signal lamp 6, Control of the state of the conductive wire; Lj 1yL5G Ot5 bristles from overcurrent sensor 7 and overvoltage sensor 8. Diodes 5 of all protection channels form an OR circuit through which voltage is supplied from a protection device with voltage, the winding of the executive relay 9 and the automatic off circuit and re-energizing the protection channels when the relay contacts are closed in them, which consists of an additional relay 10 with switching,

чающими KOHTaKTaMHj первого резистора 11, второго резистора 12, конденсатора 13 и диода 14.KOHTaKTaMHj the first resistor 11, the second resistor 12, the capacitor 13 and the diode 14.

При отсутствии аварийного режима в стабилизаторах и причин, вызывающих срабатывание реле 3 в каналах защиты, транзистор 2 в каждом канале защиты закрыт, реле 3 обесточены, а их контакты разомкнуты . . ; /In the absence of an emergency mode in the stabilizers and the reasons causing the operation of the relay 3 in the protection channels, the transistor 2 in each protection channel is closed, the relay 3 is de-energized, and their contacts are open. . ; /

Контакты реле 3 каналов защиты размыкают цепь питани обмоткн исполнительного реЛе 9, через размыкающий контакт которого подаетс сетевое напр жение на защищаемые стабилизаторы, одновременно контакты реле 3 в каналах защиты размыкают и цепь тока через диод 14, - резисторThe contacts of the relay 3 protection channels open the power supply circuit of the winding of the executive relay 9, through the opening contact of which the mains voltage is applied to the protected stabilizers, at the same time the contacts of the relay 3 in the protection channels open and the circuit through the diode 14 is a resistor

Пи обмотку реле Ю, через размыкающий контакт которого подаетс напр жение на обмотке реле 3 каналов защиты. Конденсатор 13 разр жен и напр жение на нем равно нулю.The coil of the relay is U, through the opening contact of which voltage is applied to the coil of the relay of 3 protection channels. The capacitor 13 is discharged and the voltage across it is zero.

При замыкании контактов реле 3 в каком-либо из каналов защиты напр жение Ё ОКажетс приложенным к обмотке исполнительного реле 9 и обмотке реле 10, чтоWhen the contacts of the relay 3 are closed in any of the protection channels, the voltage Yo OKajet is applied to the winding of the executive relay 9 and the winding of the relay 10, which

обусловлено зар дным током конденсатораdue to capacitor charge current

13, который протекает через обмотку реле 10,13, which flows through the winding of the relay 10,

диод 14, диод 5 соотвётствук)щего каНала заЩЖб и ЗаШНутОе в данном канале защитыdiode 14, diode 5 of the corresponding channel for the protection channel and safety in this protection channel

Claims

relay contacts 3. Relay 10 is triggered and switches the voltage Eiic of the windings of the relay 3 as the protection to the resistor 12, through which the accelerated charge of the condenser 13 is produced. As the capacitor 13 is charged, the current through the relay: iO decreases and when eria becomes equal to the current of the lowering of the relay 10, It switches the contacts to the initial position, at which the voltage E. .. will again be applied to the relay of the 3 protection channels. The absence of voltage on the windings of the protection channel relays. During the time of switching and lowering the contacts of the relay 10, the closed contacts of the relay 3 are opened in accordance with the protection channel. Since the response time of the executive power relay 9 is significantly longer than the time at which the contacts-relays of the 3 protection channels are in the closed state, the executive relay does not have time to go off and will still apply a network voltage to the protected stabilizers. Further work will depend on the reason that caused the closure of the relay 3 contacts in the protection channels. in the event that the cause of the relay 3 in the protection channel was an accident in the power supply system, then after turning off and restarting the power supply, the protection windings of the 3 protection channels closed the contacts of relay 3 again, because the signal from the overcurrent sensor 7 or from the overvoltage sensor 8 will re-open the transistor 2, which will trigger the relay 3 and self-blocking through the diode 4. When the relay 3 is triggered in the channel, the relay 10 is not protected, because the capacitor 13 is charged before the voltage close to E, so The actuator will trigger an actuating relay 9, which disconnects the mains voltage from the group of protected stabilizers. In. if by the time the voltage is applied to the EY. If the winding of the protection channel relay causes paHiee triggering of the relay 3, the cause has ceased to act, then the contacts of the relay 3 will remain open. After that, the contactor 13 is discharged through a resistor 11, and when the capacitor 13 is discharged, the circuit will become ready to perceive the subsequent operation of relay 3 in the protection channels. The discharge time of the capacitor 13 must exceed the time of the executive relay 9, since with a more rapid discharge of the capacitor 13, the possibility of the operation of the executive relay 9 is prevented when an emergency condition occurs in the power supply system. . Using the proposed device for switching off and re-energizing the windings of relays in the protection channels ensures higher reliability of its operation by eliminating false protection trips when there is no emergency in the power supply, which can be associated with ecTecTfieHHjtJM for electronic devices with short-term inrush currents of load, sufficient in time for the relay to be triggered in protection channels. Output 1 is a length containing, by the number of stabilizers, protection channels, each of which consists of an overcurrent sensor, an overvoltage sensor, an amplifier on a transistor, the collector circuit of which has a relay coil, two diodes, one of which is connected to the collector of the amplifier transistor, anoam - via the closing contact of the relay - to the common bus and the anode of another diode, and an executive relay common to all protection channels; the disconnecting contact of which serves to disconnect the supply network regulators, the first winding lead is connected to the cathode of the other diode of each of the protection channels, the second output is to the power supply of the protection device, characterized in that, in order to increase the reliability of the device, a diode, first and second resistors, a condensate and an additional relay are added to it, and the diode anode is connected to the first terminal of the winding of the executive relay, the cathode is connected through a parallel connected capacitor and the first resistor to one terminal of the second resistor and the winding of an additional relay, the other terminal of which is connected to the power supply unit oystva protection istochiiHK through said additional relay break contact connected to the relay windings of channels, and through normally open contact - with the other terminal of the second resistor. Sources of information taken into account during the examination 1. USSR author's certificate No. 351204, cl. G 05 F 1/58, 1972.

2.Avtor's certificate of the USSR for the application No. 2327720 / 24-07, cl. G 05 F 1 / .58.