SU855556A1

SU855556A1 - Device (and its modifications) for testing switching-off capability of high-voltage switches

Info

Publication number: SU855556A1
Application number: SU792840870A
Authority: SU
Inventors: Александр Константинович Быструев; Геннадий Васильевич Чучукин
Original assignee: Научно-Исследовательский Центр По Испытанию Высоковольтной Аппаратуры
Priority date: 1979-11-16
Filing date: 1979-11-16
Publication date: 1981-08-15

Description

на отключагадую способность, содержащэе последовательно соединенные источник питани с индуктивностью короткого замыкани , защитный выключатель и испытуемый выключатель, параллельно которому подключена цепь формировани восстанавливающегос напр жени , состо ща из последовательно соединенных основных резистора и конденсатора, снабжено двум цеп ми, кажда из которых состоит из последовательно соединенных дополнительных резистора и конденсатора, одна из которых подключена параллельно источнику питани с индуктивностью короткого замыкани , а втора параллельно цепи, состо щей из источника питани с индуктивностью короткого загиикани и защитного выключател .The disconnecting capacity, containing a series-connected power source with a short-circuit inductance, a safety switch, and a test switch, in parallel with which a regenerating voltage formation circuit, consisting of a series-connected main resistor and a capacitor, is connected, equipped with two circuits, each of which connected additional resistors and a capacitor, one of which is connected in parallel to a power source with inductance to short-circuit and the second parallel circuit consisting of the power supply inductance and short zagiikani protective switch.

Кажда цепь содержит дополнительный резистор, одни из выводов которых соединены с соответствующими выводами защитного выключател , а другие - через дополнительный конденсатор - с одним из выводов источника питани .Each circuit contains an additional resistor, one of the terminals of which is connected to the corresponding terminals of the safety switch, and the others, via an additional capacitor, with one of the terminals of the power supply.

Кажда цепь содержит дополнительный резистор, одни из выводов которы соединены с соответствующими выводам защитного выключател , а другие через последовательно соединенные дополнительный конденсатор и другой дополнительный резистор - с одним из выводов источника питани .Each circuit contains an additional resistor, one of the terminals of which is connected to the corresponding terminals of the safety switch, and the other through a series-connected additional capacitor and another additional resistor to one of the terminals of the power supply.

Кажда цепь содержит дополнительный конденсатор, одни из выводов которых соединены с соответствующими выводами защитного выключател , а другие - через дополнительный резистор - с одним из выводов источника питани .Each circuit contains an additional capacitor, one of the terminals of which is connected to the corresponding terminals of the safety switch, and the others, via an additional resistor, with one of the terminals of the power supply.

Кажда цепь содержит дополнительный конденсатор, одни из выводов которых соединены с соответствующими выводами защитного выключател , а другие - через последовательно соединенные дополнительный резистор и другой дополнительный конденсатор с одним из выводов источника питани Each circuit contains an additional capacitor, one of the terminals of which is connected to the corresponding terminals of a safety switch, and the others through an additional resistor connected in series and another additional capacitor to one of the terminals of the power supply.

На фиг. 1 представлена электрическа схема устройства с двум цеп ми состо щими из резисторов и конденсаторов , включенных последовательно; на фиг. 2 -то же, но с общим конденсатором в цеп х; на фиг. 3 - то же, но с общими конденсатором и резистором в цеп х; на фиг. 4 - схема устройства с двум цеп ми, состо щими 3 конденсаторов , и общим резнетором в цеп х; на фйг. 5 - то же, но с общим конденсатором в цеп х.FIG. Figure 1 shows the electrical circuit of the device with two circuits consisting of resistors and capacitors connected in series; in fig. 2 is the same, but with a common capacitor in the circuits; in fig. 3 - the same, but with a common capacitor and a resistor in the circuits; in fig. 4 is a schematic of a device with two circuits consisting of 3 capacitors and a common chopper in circuits; on fig. 5 - the same, but with a common capacitor in the circuit.

Устройство содержит источник 1 питани с индуктивностью 2 коротког замыкани , защитный выключатель 3, . индуктивность 4 соединительных проводов , испытуемый выключатель 5, цепь формировани восстанавливающегос напр жени , состо ща из резисThe device contains a power source 1 with inductance 2 short-circuits, a safety switch 3,. inductance 4 connecting wires, test switch 5, regenerative voltage shaping circuit, consisting of resis

тора 6 и конденсатора 7, цепи, образованные резисторами 8 и 9 и конденсаторами 10 и 11, конденсатор 12 и резистор 13..torus 6 and capacitor 7, circuits formed by resistors 8 and 9 and capacitors 10 and 11, capacitor 12 and resistor 13 ..

Устройство работает следующим образом .The device works as follows.

При проведении испытаний ток от источника 1 питани через индуктивность 2 короткого замыкани , защитный выключатель 3 и соединительные провода 4 подаетс на контакты испытуемого выключател 5, которые замкнуты. Испытуемый выключатель 5 подвергаетс действию тока короткого замыкани . Затем через некоторое врем подаетс команда на отключение испытуемого .выключател 5. После выполнени операции Отключение на контактах испытуемого выключател 5 восстанвливаетс напр жение, которое формируетс всеми элементамиDuring the tests, the current from the power supply 1 through the short-circuit inductance 2, the protective switch 3 and the connecting wires 4 is applied to the contacts of the test switch 5, which are closed. The test switch 5 is subjected to a short circuit current. Then, after some time, a command is issued to turn off the test switch. 5. After performing the Shutdown operation, the voltage recovered at the contacts of the test switch 5, which is formed by all elements

0 схемы (2,4,6,7,8,9,10,11), выбранными так, чтобы форг/ia кривой восстанавливающегос напр жени соответствовала заданной. Вследствие этого параметры элементов 6-11 должны удовлетвор ть следующим услови м:0 schemes (2,4,6,7,8,9,10,11), chosen so that the forg / ia curve of the restoring voltage corresponds to the specified one. As a consequence, the parameters of elements 6-11 must satisfy the following conditions:

сwith

О -ABOUT -

,,

1one

-S).-S)

Li Li

РО--Я„ -.RO - I „-.

«1-4 Ц"1-4 C

где и„, R и С - элементы (индуктивк . Jwhere and „, R and С - elements (inductance J

ность, резистор и конденсатор) схемы испытани выключател при формировании двухпараметрической кривой восстанавливаюцегос напр жени , удовлетвор ющей стандарту, определ емые применительно к конкретному испытуемому аппарату. Индексы при буквенных обозначени х соответствуют цифровым обозначени м элементов схемы.resistor and capacitor) circuit breaker test when forming a two-parameter curve of the recovery voltage that meets the standard, defined in relation to a particular device under test. Indexes with letter designations correspond to the numerical designations of the circuit elements.

Claims

In case of failure of the tested switch 5, the short-circuit current is disconnected, this operation is performed by the protective switch 3, the voltage of which is restored at the contacts of which is determined by the parameters of the elements 2,4,8,9,10,11. Elements 6 and 7 are not involved, since they are locked by the contacts (or the electric arc between them) of the test switch 5, Elements 8-11 reduce the speed of the voltage recovery on the safety switch 3, make it easier to turn off the short circuit cable and in this way, the source of the 1 pI is prevented from overloading. In addition, in this case, there is a significant less wear on the contacts of the safety switch 3, which makes it less likely to revise it. In the case of using the device in FIGS. 2 and 4, the common elements 12 and 1 can be defined as follows: C ,, ((cC,); "-. (, C-CT is the implementation of the devices in FIG. 5 and the parameters of the circuits (8 , 9,13 and 10, 11,12) must satisfy the conditions for figure 3: g, -1o .. lia b. (., G, -. For figure 5: c.,., (I) ;,. ,,,. f- t "T, c-c. O h. The advantage of the device is that all elements of the formation of the restoring voltage are in a static state, i.e. no additional switching elements are required and In addition, the device allows you to protect the shock generator p in case of its use as a current source from possible overvoltages in case of failure of the tested switch Formula 1. Testing device for high-voltage switches for switching capacity, containing, respectively, connected source with a short Kani inductance, protective switch parallel to the subject A circuit breaker is connected to the circuit breaker, consisting of a series-connected main resistor and a capacitor, characterized in that In order to increase reliability, two circuits are introduced into it, each of which consists of a series-connected additional resistor and a capacitor, one of which is connected in parallel to a power source with a short-circuit inductance, and the second is parallel to a circuit consisting of a power source with a short-circuit inductance And safety switch.

2. A device for testing high-voltage circuit breakers for breaking capacity containing a series-connected power source with a short-circuit inductance, a safety switch, connected to a circuit breaker under test, a regenerating voltage forming circuit consisting of series-connected main resistors and a capacitor, characterized in that In order to improve reliability, two circuits are introduced into it, each of which contains an additional resistor, one of the conclusions of which is Ina with the appropriate terminals of the safety switch, and the others through an additional capacitor with one of the terminals of the power supply.

3. A device for testing high-voltage circuit breakers for breaking capacity, containing a series-connected power source with a short-circuit inductance, a safety switch, a parallel voltage forming circuit consisting of series-connected resistors and a capacitor connected in parallel with the switch under test, in order to increase reliability, two chains are introduced into it, each of which. It contains an additional resistor, one of the terminals of which is connected to the corresponding terminals of the safety switch, and the others, through a series-connected additional capacitor and another additional resistor, to one of the terminals of the power supply.

4. A device for testing high-voltage switches for breaking capacity containing series-connected, power supply with short-circuit inductance, safety switch, in parallel with the switch being tested, a regenerating voltage shaping circuit connected

of a resistor and a capacitor connected in series, characterized in that, in order to improve reliability, two circuits are inserted in it, each of which contains an additional capacitor, one of the terminals of which is connected to the corresponding terminals of the protective switch, with one of the power supply pins.

5. A device for testing high-voltage circuit breakers for breaking capacity, containing a series-connected power source with a short-circuit inductance, a safety switch, in parallel with the switch under test, a regenerating voltage shaping circuit connected in series, consisting of series-connected main resistors and a capacitor, characterized in that in order to increase reliability, two circuits are introduced into it, each of which contains an additional capacitor, one of the conclusions of which they are connected to the corresponding leads of a safety switch, and the others are connected through a series-connected additional resistor and another additional capacitor to one of the terminals of the power supply.

Sources of information taken into account in the examination

1. The patent of Germany No. 1001763, cl. 21 e 37/03, 1954.

2. AC switches for voltage above 1000 V. GOST 681778. M., State Standard of the USSR, 1979,

with. 87 hell 3 (prototype).