SU465691A1

SU465691A1 - Device for protection against breakage of the circuits of the excitation windings of a group of direct current electric motors

Info

Publication number: SU465691A1
Application number: SU1806719A
Authority: SU
Inventors: Юрий Владимирович Гриб; Николай Васильевич Милушев; Вадим Дмитриевич Саблин
Original assignee: Предприятие П/Я Г-4448
Priority date: 1972-07-10
Filing date: 1972-07-10
Publication date: 1975-03-30

Description

С целью ограничени зар дного тока конденсаторов последовательно с шунтирующими элементами включены дополнительно введенные резисторы.In order to limit the charge current of the capacitors in series with the shunt elements, additionally introduced resistors are included.

С целью повышени надежности срабатывани выходного релейного элемента величина резистора, включенного в контролируемую цепь, превышает величину, необходимую дл получени номинального напр жени управлени выходного релейного элемента.In order to increase the reliability of operation of the output relay element, the value of the resistor included in the controlled circuit exceeds the value required to obtain the nominal control voltage of the output relay element.

На чертеже изображено предлагаемое устройство дл защиты от обрыва цепей обмоток возбуждени , включаемое в контролируемые цепи при наличии в них приемников энергии до и после устройства.The drawing shows the proposed device for protection against breaks in the circuits of the excitation windings, which are included in controlled circuits if they have energy receivers before and after the device.

Устройство состоит из выходного релейного элемента 1, вывод 2 цепи управлени которого через последовательно соединенные диоды 3 и конденсаторы 4 соединен с каждой контролируемой цепью 5. Вывод 6 цепи управлени соединен с контролируемыми цеп ми через диоды 7, причем между точками подключени цепи управлени выходного релейного элемента к каждой контролируемой цепи в последние включены резисторы 8.The device consists of an output relay element 1, the control circuit terminal 2 of which is connected through series-connected diodes 3 and capacitors 4 to each monitored circuit 5. The control circuit terminal 6 is connected to controlled circuits via diodes 7, and between the control relay connection points of the output relay element Resistors 8 are connected to each controlled circuit.

Последовательные резисторы в цепи зар да каждого конденсатора, включающие диоды 3 и 7 и цепь управлени выходного релейного элемента 1, защунтированы опорными диодами 9, в цепь которых включены резисторы 10.The series resistors in the charge circuit of each capacitor, including diodes 3 and 7 and the control circuit of the output relay element 1, are backed up by reference diodes 9, in the circuit of which resistors 10 are included.

Устройство работает следующим образом.The device works as follows.

При подаче напр жени на зажимы контролируемой цепи конденсатор 4 зар жаетс до величины падени напр жени на резисторе 8, и на обкладках его устанавливаетс пол рность , указанна на чертеже. Обрыв контролируемой цепи вызывает разр дку конденсатора и, следовательно, протекание тока по цепи управлени выходного релейного элемента , что влечет за собой включение последнего .When voltage is applied to the terminals of the circuit to be monitored, the capacitor 4 is charged to the magnitude of the voltage drop across the resistor 8, and its polarity is set on the plates as indicated in the drawing. Breaking the monitored circuit causes the capacitor to discharge and, therefore, the current to flow through the control circuit of the output relay element, which leads to the inclusion of the latter.

Предмет изобретени Subject invention

Claims

1. Device for protection against breaks in the circuits of the excitation windings of a group of direct current electric motors containing an output relay element connected to each monitored circuit, characterized in that, in order to simplify protection, one output of the control circuit of the output relay element through serially connected diodes and capacitors connected to the outputs of the same potential of the resistors included in each controlled circuit, the diodes being connected opposite to the direction of the charging current of the capacitors, and

The second output of the control circuit of the output relay element is connected to points of opposite potential of these resistors.

2. The device according to claim 1, characterized in that, in order to enable

connecting the device to the controlled circuit at any point, the second output of the control circuit of the output relay element is connected to the points of opposite potential of the resistors through the additionally introduced diodes connected in the opposite direction of the charging current of the capacitors.

3. The device according to claim 2, characterized in that, in order to reduce the charge time of the capacitors and limit the voltage

control of the output relay element, the series resistors in the charge circuit, including the diodes and the control circuit of the output relay element, are bypassed by the diodes.