SU886090A1

SU886090A1 - Vacuum arc chute contacts

Info

Publication number: SU886090A1
Application number: SU802860436A
Authority: SU
Inventors: Кемаль Кадырович Намитоков; Александр Алексеевич Сокол; Дмитрий Павлович Солопихин; Иван Яковлевич Суровцев; Владимир Яковлевич Тугайбей
Original assignee: Предприятие П/Я А-7147
Priority date: 1980-01-02
Filing date: 1980-01-02
Publication date: 1981-11-30

Description

(54) КОНТАКТЫ ДЛЯ ВАКУУМНОЙ ДУГОГАСИТЕЛЬНОЙ КАМЕРЫ(54) CONTACTS FOR VACUUM ARMORING CAMERA

II

. Изобретение относитс к эпектротехгапсе, в частности к контактам дл вакуумных коммутационных аппаратов.. This invention relates to a process assembly, in particular, to contacts for vacuum switching devices.

Известны контакты дл вакуухшмх дугогасительных камер, изготовленные из тугоплавго материала, в котором вьтолнены углублени и заполнены легкоплавким материалом с малым током среза 1.Contacts are known for vacuum-extinguishing chambers made of a refractory material, in which recesses are filled and filled with low-melting material with a low cut-off current 1.

При размыкании контактов между ними воэшпсает дуга, основани которой фиксируютс на углубленн х. Это приводит к длителы{ому (ществованию дуги высокой эрозии кошакпмв и росту вёличиш тока среза.When the contacts between them open, the arc, the bases of which are fixed on the recessed, voids. This leads to long periods (the existence of a high erosion arc cat and an increase in cutoff current.

Известны также контакты дн вакуумнс дугогасительной камеры, содержащие контактирующие поверхности из тугоплавкого материала , на которых выполнены углублени в виде концентрической канавки и одного дентралыюго углублени , заполненные легкоплавким материалом с малым током среза, причем контактирующие поверхности вл ютс зеркальным отображением одна другой относительно плоскости контактировани . В этом случае основани дуги не фнксируютс , а перемещаютс Also known are day contacts of an arc-suppressing chamber, containing contacting surfaces of refractory material, in which recesses in the form of a concentric groove and one central recess filled with low-melting fusible material with a low cut-off current are made, and the contacting surfaces are a mirror image of one another relative to the contact plane. In this case, the bases of the arc are not fixed, but are moved

вдоль границы раздела даух матерналов, врем существовани дуга не более одного полупериода переменного тока, а коммутационна износостЫ (кость высока 2.along the interface of douh materials, the time of existence of an arc of not more than one half-cycle of alternating current, and switching wear (the bone is high 2.

К недостаткам известных контактов следует отнестн то, что, когда врем существовани дуги меньпю, чем врем , необходимое дл перемещени основани дуги к границе раздела, величина тока среза становитс ровной току среза тугошввкого матертала и позтому возникает The disadvantages of the known contacts are that when the time of existence of the arc is less than the time required to move the base of the arc to the interface, the value of the cutoff current becomes equal to the cutoff current of the material and therefore appears

10 потребность в применении огран1тагтелей перенапр жений дл защиты изол ции коммутируемого злектрооборудованн .10 the need to use overvoltage limiters to protect the isolation of switched electrical equipment.

Цель изобретени - повьпиение надежности работы за счет снижени тока среза до уровн , The purpose of the invention is to increase the reliability of operation by reducing the cut-off current to the level

IS соответствующего току среза легкоплавкого материала.IS corresponding to the cutoff current fusible material.

Указанна цель достигаетс тем, что в контактах дл вакуумной дугогасительной камеры, содержащих контактирующие поверхности из This goal is achieved by the fact that in contacts for a vacuum interrupter chamber containing contacting surfaces from

Claims

20 of the refractory material, on which concentric grooves filled with low-melting material with a low cut-off current are located, in the plane of contact of these surfaces concentric grooves are located between contacting surfaces between the concentric grooves of the other contacting surface. The drawing shows a contact for an arc chute. The contact contains contacting surfaces 1 and 2, made of refractory material. The surfaces are made of concentric grooves 3 and 4, filled with low-melting material with a low cutting current. The concentrator grooves 3 are located in the plane of contact of surfaces 1 and 2 between the concentric grooves 4 so that contact is made along the concentric rings 5 of the refractory material. When opening the contacting surfaces 1 and 2, the bases of the arcing arc are located on the refractory material, which under the action of electromagnetic forces are shifted to the interface between the refractory and fusible materials. The latter, under the action of the arc, evaporates and maintains the existence of the arc until the current is cut, which corresponds to the cut current of the low-melting material. Since the distance between the base of the arc and the interface with such a contact design is significantly less than with a mirror image of the contacting surfaces, the time for walking the base of the arc on the refractory material / J 4 material is also smaller than in the known k-awkakts. This makes it possible to reduce the cut-off current to the level of the cut-off current of the low-melting material, i.e. increase the reliability of the switched equipment without the use of surge suppressors. Claims of contacts for a vacuum arcing chamber containing contacting surfaces of refractory material, on which concentric grooves are made, filled with low-melting material with a low cut-off current, characterized in that in order to increase the reliability by reducing the cut-off current to a level corresponding to the cut-off current fusible material, in the plane of contacting these surfaces, the concentric grooves of one of the contacting surfaces are located between the concentrically grooves of another contacting surface. Sources of information taken into account in the examination 1. UK Patent N ° 835325, cl. 38 (5), 1956.

2. The UK patent number 1142200, cl. H 1 N 1965 (prototype).