WO2020248556A1 - Nouveau disjoncteur à boîtier en plastique à double point de contact - Google Patents

Nouveau disjoncteur à boîtier en plastique à double point de contact Download PDF

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Publication number
WO2020248556A1
WO2020248556A1 PCT/CN2019/125636 CN2019125636W WO2020248556A1 WO 2020248556 A1 WO2020248556 A1 WO 2020248556A1 CN 2019125636 W CN2019125636 W CN 2019125636W WO 2020248556 A1 WO2020248556 A1 WO 2020248556A1
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WO
WIPO (PCT)
Prior art keywords
contact
circuit breaker
movable contact
static
case circuit
Prior art date
Application number
PCT/CN2019/125636
Other languages
English (en)
Chinese (zh)
Inventor
吴学海
金炼
秦朝阳
唐福礼
Original Assignee
江苏亚开电气有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江苏亚开电气有限公司 filed Critical 江苏亚开电气有限公司
Publication of WO2020248556A1 publication Critical patent/WO2020248556A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts

Definitions

  • the utility model relates to a circuit breaker, in particular to a plastic case circuit breaker.
  • Low-voltage circuit breaker is a mechanical switching device widely used in low-voltage power distribution systems. It has short-circuit protection, overload protection and isolation functions. It is mainly suitable for infrequent conversion and in circuits with rated voltages not exceeding AC 1000V or DC 1500V. The motor does not start frequently.
  • the low-voltage circuit breaker cuts off the current, if the circuit voltage is not less than 10-20V and the current is not less than 80-100mA, an electric arc will be generated between the contacts of the electrical appliance, and the arc will be sucked into the arc extinguishing chamber to be cooled and extinguished, and there is a part of the arc Or ionized gas is ejected from the arc port on the power end of the circuit breaker to form an arc.
  • the manufacturer will indicate the arcing distance of the product, that is, under the specified conditions, such as rated voltage and power factor, follow the specified procedures The arc flying distance when breaking the specified short-circuit current. When the arcing distance is zero, it is called zero arcing.
  • the arcing temperature is as high as thousands of degrees Celsius, and the arcing itself also has electrical conductivity, which causes serious harm.
  • the arc sprayed by switch appliances may be directly sprayed on the grounded metal frame such as switch cabinets and power distribution panels, which will cause damage to metal conductors, abnormal surge voltages on lines, burns to operators, and equipment , Make the insulation aging and other conditions, such as short-circuit failure, explosion, and fire, threatening the safety of life and property.
  • the internal space is compressed in order to pursue a smaller size, which will increase the probability of internal arc faults.
  • the space in the converter cabinet and box transformer cabinet is limited, and arcing may be damaged Other equipment causes accidents. Due to safety requirements, some requirements are put forward for the arcing distance of low-voltage circuit breakers. The arcing distance is required to be short or zero arcing. Large arcing distances will inevitably lead to a large power distribution cabinet. This results in increased consumables and increased costs.
  • the purpose of the utility model is to provide a new type of double-contact plastic case circuit breaker, which reduces the breaking energy, improves the breaking index, and reduces the free gas and arc particles generated during breaking.
  • a new type of double-contact plastic case circuit breaker the package block is arranged in the movable contact and the static contact in the shell, and the middle of the movable contact is installed on the shell via a rotating shaft.
  • Both ends of the moving contact are provided with moving contacts, and the two moving contacts are respectively arranged on the front and back sides of the two ends of the moving contact.
  • the housing is also provided with two static contacts correspondingly.
  • a static contact corresponding to the moving contact is arranged on the head, the static contact is processed with a U-shaped structure, and the static contact is arranged on the end surface of the U-shaped structure.
  • the beneficial effect of the utility model is that the utility model adopts measures to increase the contact fracture; when the current is disconnected, each contact bears 1/2 voltage, the recovery voltage amplitude is low, and the medium recovery strength It is easy to exceed the recovery voltage increase, which can reduce the breaking energy, improve the breaking index, and reduce the free gas and arc particles generated during the breaking; the contact system is closed, which is equivalent to the sealing of the area behind the contact, and the gas pressure generated by the breaking can be used for rapid arc Enter the arc extinguishing chamber to achieve the effect of rapid arc extinguishing; at the same time, the static contact is designed into a U-shaped structure, and a U-shaped loop is formed on the static contact, which can make the current flow in the opposite direction when the dynamic and static contact circuits flow, increasing The electric repulsion between the moving and static contacts, because the current flows in the static conductive rod and the moving conductive rod in opposite directions, the loop force received by the moving contact is the upward repulsive force, plus the force caused
  • two sets of arc extinguishing grid plates are also arranged in the housing, and the two sets of arc extinguishing grid plates are arranged beside the movable contact and the static contact.
  • the two ends of the movable contact are processed with extension parts that cooperate with the arc extinguishing grid, and the extension part and the movable contact are bent at an angle.
  • Figure 1 is a schematic diagram of the structure of the utility model.
  • 1 moving contact 1a moving contact, 1b extension, 2 static contact, 2a static contact, 3 arc extinguishing grid.
  • a new type of double-contact molded case circuit breaker the package block is set in the movable contact 1 and the static contact 2 in the shell, the middle of the movable contact 1 is installed on the shell via the rotating shaft, and the movable contact Both ends of 1 are provided with movable contacts 1a, and the two movable contacts 1a are respectively arranged on the front and back sides of the two ends of the movable contact 1.
  • the housing is also provided with two static contacts 2 correspondingly, and the two static contacts 2 are provided
  • the static contact 2a corresponding to the movable contact 1a, the static contact 2 is processed in a U-shaped structure, and the static contact 2a is arranged on the end surface of the U-shaped structure, and two sets of arc extinguishing grids 3 are arranged in the shell.
  • the arc extinguishing grid 3 is arranged beside the movable contact 1 and the static contact 2. Both ends of the movable contact 1 are processed with extensions 1b that are matched with the arc extinguishing grid 3, between the extensions 1b and the movable contact 1. Bend at an angle.
  • the present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed by the present utility model, those skilled in the art can make some of the technical features according to the disclosed technical content without creative work. Replacement and deformation, these replacements and deformations are all within the protection scope of the present invention.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

L'invention concerne un nouveau disjoncteur à boîtier en plastique à double point de contact, se rapportant au domaine des disjoncteurs et comprenant : un contact mobile (1) et des contacts fixes (2) disposés dans un boîtier. La partie intermédiaire du contact mobile (1) est disposée sur le boîtier au moyen d'un arbre rotatif. Des points de contact mobile (1a) sont disposés sur les deux extrémités du contact mobile (1). Les deux points de contact mobile (1a) sont respectivement disposés sur les surfaces avant et arrière des deux extrémités du contact mobile (1). Le boîtier est en outre pourvu de deux contacts fixes (2). Les deux contacts fixes (2) sont pourvus de points de contact fixe (2a) correspondant aux points de contact mobile (1a). Les contacts fixes (2) sont traités pour prendre la forme d'une structure en forme de U. Les points de contact fixe (2a) sont disposés sur la surface d'extrémité de la structure en forme de U. Selon le disjoncteur à boîtier en plastique à double point de contact, grâce à la mesure des coupures de contact croissantes, chaque contact supporte une seconde tension en cas de coupure de courant, ce qui permet de réduire l'énergie de rupture, d'améliorer l'indice de rupture, de réduire les gaz libres et les particules d'arc produits lors la rupture, et peut être appliqué à un disjoncteur basse tension.
PCT/CN2019/125636 2019-06-11 2019-12-16 Nouveau disjoncteur à boîtier en plastique à double point de contact WO2020248556A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201920869153.8 2019-06-11
CN201920869153 2019-06-11

Publications (1)

Publication Number Publication Date
WO2020248556A1 true WO2020248556A1 (fr) 2020-12-17

Family

ID=73781312

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/125636 WO2020248556A1 (fr) 2019-06-11 2019-12-16 Nouveau disjoncteur à boîtier en plastique à double point de contact

Country Status (1)

Country Link
WO (1) WO2020248556A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4110717A (en) * 1976-12-30 1978-08-29 Texas Instruments Incorporated Circuit breaker
CN2427013Y (zh) * 2000-03-30 2001-04-18 上海奥富捷电气终端成套厂 多路断路器
CN202633100U (zh) * 2012-06-01 2012-12-26 徐州志信电气科技有限公司 矿用千伏级双刀双断点空气式隔离换向开关
CN103094015A (zh) * 2013-01-30 2013-05-08 贵州长征开关制造有限公司 模块化双断点塑料外壳式断路器
CN205845870U (zh) * 2016-06-28 2016-12-28 上海通用广电电力元件有限公司 一种限流型高分断低压塑壳断路器转轴机构
CN109494132A (zh) * 2018-12-31 2019-03-19 盛道（中国）电气有限公司 一种双触点塑壳断路器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4110717A (en) * 1976-12-30 1978-08-29 Texas Instruments Incorporated Circuit breaker
CN2427013Y (zh) * 2000-03-30 2001-04-18 上海奥富捷电气终端成套厂 多路断路器
CN202633100U (zh) * 2012-06-01 2012-12-26 徐州志信电气科技有限公司 矿用千伏级双刀双断点空气式隔离换向开关
CN103094015A (zh) * 2013-01-30 2013-05-08 贵州长征开关制造有限公司 模块化双断点塑料外壳式断路器
CN205845870U (zh) * 2016-06-28 2016-12-28 上海通用广电电力元件有限公司 一种限流型高分断低压塑壳断路器转轴机构
CN109494132A (zh) * 2018-12-31 2019-03-19 盛道（中国）电气有限公司 一种双触点塑壳断路器

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