KR20050024107A - Excessive Current Circuit Breaker - Google Patents

Excessive Current Circuit Breaker Download PDF

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Publication number
KR20050024107A
KR20050024107A KR1020030061918A KR20030061918A KR20050024107A KR 20050024107 A KR20050024107 A KR 20050024107A KR 1020030061918 A KR1020030061918 A KR 1020030061918A KR 20030061918 A KR20030061918 A KR 20030061918A KR 20050024107 A KR20050024107 A KR 20050024107A
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KR
South Korea
Prior art keywords
bimetal
circuit breaker
current
opening
excessive current
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KR1020030061918A
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Korean (ko)
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KR100522033B1 (en
Inventor
정연태
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태성전기(주)
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Priority to KR10-2003-0061918A priority Critical patent/KR100522033B1/en
Publication of KR20050024107A publication Critical patent/KR20050024107A/en
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Publication of KR100522033B1 publication Critical patent/KR100522033B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H2071/168—Provisions for avoiding permanent deformation and thus decalibration of bimetal, e.g. due to overheating or action of a magnet

Abstract

PURPOSE: An excessive current circuit breaker is provided to prevent damages to circuit components or power facilities by quickly breaking current supply using a bimetal operated by a magnetic field due to an excessive current. CONSTITUTION: A connector node(18) connects an input terminal(16) to a load terminal(17) in a body(11). An open/close member(13) turns on or off the connector node. A circuit board(15) detects an erroneous current to actuate a bimetal(19). An operational lever(21) is moved backwards by the bimetal to actuate the open/close member. A magnetic structure(20) is implemented in a direction toward the operational lever. The bimetal is adjacent to the magnetic structure.

Description

과대전류 회로차단기{Excessive Current Circuit Breaker} Excessive Current Circuit Breaker

본 발명은 회로차단기에 관한 것으로, 특히 과전류나 단락사고의 발생시 이상전류를 검출하여 입력측 단자로부터 유입되어 부하측으로 흐르는 전류를 차단하는 회로차단기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker, and more particularly, to a circuit breaker that detects an abnormal current in the event of an overcurrent or short circuit accident and cuts off the current flowing from the input terminal to the load side.

주지하는 바와 같이 회로 차단기는 이상전류 검출시 입력측 단자와 부하측 단자를 연결하는 접점을 차단하여 부하측으로 인가되는 전류를 차단하는 장치로서, 이러한 회로차단기를 첨부한 도면 도 1 및 도 2 a), b)로 도시하였다.As is well known, a circuit breaker is a device that cuts a current applied to a load side by blocking a contact connecting an input terminal and a load terminal when an abnormal current is detected, and the circuit breaker is attached to FIGS. 1 and 2 a) and b. ).

이에 의하면 회로차단기(100)는 입력전원과 접속되는 입력측 단자(105), 부하측과 연결되는 부하측 단자(106), 입력측 단자(105)와 부하측 단자(106)를 접속하는 접점(107), 이상전류를 감지하여 적절한 신호를 보내는 회로기판(110), 이상전류 발생시 가열되어 일측으로 휘어지며 작동레버(109)를 후퇴시키는 바이메탈(108), 개폐핸들(104)이 구비되고 작동레버(109)의 후퇴에 의하여 접점을 차단시키는 개폐기구부(103) 등이 몸체(101)에 설치되고, 이러한 몸체(101)의 상측에 커버(102)가 결합 설치된 것이다.Accordingly, the circuit breaker 100 includes an input terminal 105 connected to an input power source, a load side terminal 106 connected to a load side, a contact 107 connecting an input side terminal 105 and a load side terminal 106, and an abnormal current. The circuit board 110 that detects the signal and sends an appropriate signal, is heated to bend to one side when an abnormal current is generated, and is provided with a bimetal 108 and an opening / closing handle 104 which retracts the operation lever 109 and the retraction of the operation lever 109. Opening and closing mechanism 103 and the like to block the contact by the body 101 is installed, the cover 102 is installed on the upper side of the body 101 is coupled.

이러한 회로차단기(100)는 첨부한 도면 도 2 a) 및 도 2 b)로 도시한 바와 같이 과전류나 단락사고로 인하여 이상전류가 흐르면 이를 감지하여 바이메탈(108)이 작동레버(109) 측으로 휘도록 상기 바이메탈(108)을 가열시키고, 이러한 바이메탈(108)에 의하여 작동레버(109)가 후퇴되면 개폐기구부(103)가 작동되어 개폐핸들(104)을 회동시킴과 아울러 접점(107)을 분리하여 입력측 단자(105)와 부하측 단자(109)의 연결을 차단하는 것이다.The circuit breaker 100 detects when an abnormal current flows due to an overcurrent or a short circuit accident as shown in FIGS. 2A and 2B), so that the bimetal 108 bends toward the operating lever 109. When the bimetal 108 is heated and the operation lever 109 is retracted by the bimetal 108, the opening / closing mechanism 103 is operated to rotate the opening / closing handle 104 and separate the contact 107 to input the side. The connection between the terminal 105 and the load terminal 109 is cut off.

따라서 입력측에서 부하측으로 인가되는 전류가 차단되어 이상전류에 의한 사고를 방지할 수 있게 되는 것이다.Therefore, the current applied from the input side to the load side is cut off to prevent an accident caused by an abnormal current.

그러나 상기 회로차단기(100)는 인가되는 전류를 차단하기 위하여 바이메탈(108)의 작동이 필수적이나, 이러한 바이메탈(108)은 가열 후 휘어야 되므로 작동에 시간이 소요되어 신속한 차단이 어렵게 되고, 따라서 순간적으로 대단히 큰 과대전류가 흐를 때에는 바이메탈(108)의 작동에 따른 전류의 차단이 이루어지기 전에 부하의 소손이나 전력설비의 손상을 초래하게 되는 등의 문제가 있다.However, the circuit breaker 100 requires the operation of the bimetal 108 in order to block the applied current, but since the bimetal 108 needs to be bent after heating, it takes a long time to operate, thus making it difficult to cut off quickly. Therefore, when a very large excessive current flows, there is a problem such that the load is damaged or the power equipment is damaged before the current is blocked according to the operation of the bimetal 108.

본 발명의 목적은 상기와 같은 종래의 문제를 감안하여 대단히 큰 과대전류가 흐를 경우 바이메탈이 자기장에 의하여 신속하게 흡인 작동되도록 함으로써 신속한 전류의 차단이 가능하도록 하는 회로차단기를 제공함에 있다. Disclosure of Invention It is an object of the present invention to provide a circuit breaker that enables a rapid interruption of current by allowing a bimetal to be sucked and operated quickly by a magnetic field in the event of a very large excessive current.

이러한 목적을 달성하기 위하여 본 발명은 몸체의 내부에 입력측 단자와 부하측 단자를 접속하는 접점과, 접점을 차단 또는 접속시키는 개폐기구부와, 이상전류를 감지하여 바이메탈을 작동시키는 회로기판과, 바이메탈에 의하여 후퇴되며 개폐기구부를 작동시키는 작동레버로 된 공지의 회로차단기에 있어서, 바이메탈에 인접하여 작동레버 방향으로 자성체를 설치하여 되는 회로차단기를 제안한다.In order to achieve the above object, the present invention provides a contact for connecting an input terminal and a load terminal to the inside of the body, an opening and closing mechanism for blocking or connecting a contact, a circuit board for sensing an abnormal current to operate a bimetal, and a bimetal. In a known circuit breaker made of an actuating lever which is retracted and operates an opening / closing mechanism part, a circuit breaker which provides a magnetic material in the direction of an actuating lever adjacent to a bimetal is proposed.

아울러 상기 바이메탈의 일측에 요입부를 형성하거나 또는 바이메탈의 일측이 자성체 측으로 돌출된 돌부를 형성하여 됨을 특징으로 한다.In addition, it is characterized in that the indentation portion is formed on one side of the bimetal or one side of the bimetal is formed with a protrusion protruding toward the magnetic body side.

또한, 자성체의 일측이 바이메탈 측으로 돌출된 돌부를 형성하여 됨을 특징으로 한다.In addition, one side of the magnetic body is characterized by forming a protrusion protruding toward the bimetal side.

이에 따라 본 발명은 바이메탈의 가열에 의한 작동 시간을 기다릴 여유가 없는 약 2500A 이상의 대단히 큰 과대전류 발생시 자기장에 의한 바이메탈의 즉시 작동으로 전류가 신속하게 차단되어, 과대전류로부터 부하의 소손이나 전력설비의 손상이 극소화된다.Accordingly, the present invention is the instantaneous operation of the bimetal by the magnetic field in the event of a very large excessive current of more than about 2500A can not afford to wait for the operating time by heating the bimetal, the current is quickly cut off, the load of the load from the excess current or the power equipment Damage is minimized.

상기와 같은 본 발명의 구성 및 작용을 첨부한 도면에 의거 상세히 설명하면 다음과 같다.Referring to the configuration and operation of the present invention as described above in detail as follows.

도 3은 본 발명에 의한 회로차단기를 도시한 사시도이고, 도 4 a) 내지 c)는 본 발명에 의한 회로차단기의 작동상태를 도시한 설명도이다.Figure 3 is a perspective view showing a circuit breaker according to the present invention, Figure 4a) to c) is an explanatory view showing the operating state of the circuit breaker according to the present invention.

본 발명은 몸체(11)의 내부 일측에 입력전원과 접속되는 입력측 단자(16)를 설치하고, 타측에 부하측과 접속되는 부하측 단자(17)를 설치하며, 상기 입력측 단자(16)와 부하측 단자(17)를 접속하는 접점(18)을 설치한다.According to the present invention, an input side terminal 16 connected to an input power source is installed on one side of the body 11, and a load side terminal 17 connected to a load side is installed on the other side, and the input side terminal 16 and a load side terminal ( A contact 18 for connecting 17 is provided.

아울러 개폐핸들(14)이 구비되며 상기 접점(18)을 차단 또는 접속시키는 개폐기구부(13)와, 과전류나 단락 등에 의한 이상전류를 감지하는 회로기판(15)을 설치하고, 상기 회로기판(15)의 신호에 의하여 가열되어 일방향으로 휘는 바이메탈(19)과, 바이메탈(19)에 의하여 후퇴되며 개폐기구부(13)를 작동시키는 작동레버(21)를 설치하며, 상기 바이메탈(19)에 인접하여 작동레버(21) 방향으로 자성체(20)를 설치한다.In addition, an opening / closing handle 14 is provided, and an opening / closing mechanism 13 for blocking or connecting the contact 18 and a circuit board 15 for detecting an abnormal current due to an overcurrent or a short circuit are provided. The circuit board 15 Bimetal 19 is bent in one direction and heated by a signal of) and an operating lever 21 for retreating by the bimetal 19 and operating the opening / closing mechanism part 13 is installed and operated adjacent to the bimetal 19. The magnetic body 20 is installed in the direction of the lever 21.

이와 같이 구성된 본 발명은 입력전원이 입력측 단자(16)와 접점(18) 및 부하측 단자(17)를 통하여 공급되어 부하측에 연결된 각종 전기장치들이 작동되는 것이며, 단락에 의한 과전류나 입력측으로부터 이상 과전류가 유입되는 등 이상 전류가 발생되면 회로기판(15)이 이를 감지하여 신호를 보냄으로써 바이메탈(19)이 가열되도록 한다.According to the present invention configured as described above, input power is supplied through the input terminal 16, the contact 18 and the load terminal 17 to operate various electrical devices connected to the load side. When an abnormal current occurs, such as an inflow, the circuit board 15 detects this and sends a signal to heat the bimetal 19.

이러한 바이메탈(19)은 점차 가열됨에 따라 부하측 단자(17) 방향으로 휘어지며 작동레버(21)를 후퇴시키게 되며, 개폐기구부(13)를 고정하고 있던 작동레버(21)가 후퇴됨에 의하여 상기 개폐기구부(13)가 스프링의 탄성력으로 작동되어 전류를 차단하여 이상전류에 의한 사고를 방지하는 것이다.As the bimetal 19 is gradually heated, the bimetal 19 is bent in the direction of the load-side terminal 17 and retracts the operating lever 21. As the operating lever 21 fixed to the opening / closing mechanism 13 is retracted, the opening / closing mechanism part is retracted. (13) is operated by the elastic force of the spring to cut off the current to prevent accidents caused by abnormal current.

이와 같이 하여 전류가 차단되면 부하측의 누전이나 단락여부를 확인 수리하고, 개폐핸들(14)을 온(ON) 위치로 회동시켜 전류가 다시 인가되도록 하는 것이다.In this way, when the current is cut off, the short circuit or the short circuit of the load side is checked and repaired, and the opening / closing handle 14 is rotated to the ON position so that the current is applied again.

또한, 전류가 흐르는 동안에는 바이메탈(19)에 자기장이 형성되고, 이러한 자기장은 자성체(20)에 영향을 주어 상기 자성체(20)가 자화되며, 이러한 자기장은 전류의 세기가 강할수록 커지게 된다.In addition, a magnetic field is formed in the bimetal 19 while a current flows, and the magnetic field affects the magnetic body 20 so that the magnetic body 20 is magnetized. The magnetic field becomes larger as the current intensity increases.

따라서 단락으로 인하여 순간적으로 과대전류가 흐르게 되면 자기장의 세기도 더욱 강하게 되어 바이메탈(19)과 자성체(20)가 서로 흡인되려하나, 자성체(20)는 고정된 금속이므로 바이메탈(19)이 자성체(20) 측으로 휘게 되며, 그 결과 작동레버(21)를 후퇴시켜 개폐기구부(13)가 작동되도록 하는 것이다.Therefore, if an excessive current flows momentarily due to a short circuit, the strength of the magnetic field is also stronger, so that the bimetal 19 and the magnetic body 20 are attracted to each other, but since the magnetic body 20 is a fixed metal, the bimetal 19 is a magnetic material 20 ) Will be bent to the side, as a result of the operation lever 21 to retract so that the opening and closing mechanism 13 is operated.

이와 같이 본 발명은 이상전류 발생시 바이메탈(19)의 가열로 개폐기구부(13)가 작동되어 전류를 차단하고, 약 2500A 이상의 대단히 큰 과대전류가 발생되면 바이메탈(19)의 가열을 기다리지 않고 자기장에 의하여 상기 바이메탈(19)이 즉시 작동되는 것이므로, 회로 차단이 신속하게 실시되어 부하의 소손이나 전력설비의 손상을 극소화하는 것이다.Thus, in the present invention, when the abnormal current is generated, the opening and closing mechanism 13 of the heating device of the bimetal 19 operates to cut off the current, and when a very large excessive current of about 2500 A or more is generated, the magnetic field is not waited for by heating the bimetal 19. Since the bimetal 19 is operated immediately, the circuit breaker is promptly performed to minimize the damage of the load or the damage of the power equipment.

한편, 첨부한 도면 도 5는 본 발명에 의한 회로차단기(10)의 다른 실시예를 도시한 것으로, 바이메탈(19)의 양측에 요입부(22)를 형성함으로써, 바이메탈의 작동이 더욱 촉진되도록 한 것이다.Meanwhile, FIG. 5 shows another embodiment of the circuit breaker 10 according to the present invention. The recess 22 is formed on both sides of the bimetal 19 to further promote the operation of the bimetal. will be.

즉, 바이메탈(19)이 가열 또는 자기장에 의하여 작동레버(21) 측으로 휠 때 상기 바이메탈(19)의 하측에 요입부(22)가 형성되었으므로, 굴신성이 향상되어 바이메탈(19)이 요입부(22)를 중심으로 더욱 신속하게 휘게 되는 것이다. 따라서 이상전류 발생시 전류를 신속하게 차단할 수 있게 되는 것이다.That is, when the bimetal 19 is bent to the operation lever 21 side by heating or magnetic field, the recess 22 is formed under the bimetal 19, so that the bending property is improved and the bimetal 19 is recessed ( It will be bent more quickly around 22). Therefore, it is possible to cut off the current quickly when an abnormal current occurs.

또한, 첨부한 도면 도 6 내지 도 7은 본 발명에 의한 회로차단기(10)의 또 다른 실시예를 도시한 것으로, 이는 바이메탈(19)의 일측에 자성체(20) 측으로 돌출된 돌부(23)를 형성하거나 또는 자성체(20)의 일측에 바이메탈(19) 측으로 돌출된 돌부(25)를 형성하여 된 것이며, 이러한 다른 실시예에 의하면 바이메탈(19)과 자성체(20)의 간격이 접근되는 것이므로, 자기장에 의한 흡인력이 더욱 강화되어 이상전류 발생시 바이메탈(19)이 신속하게 작동되어 전류를 차단할 수 있게 된다.6 to 7 illustrate another embodiment of the circuit breaker 10 according to the present invention, which includes a protrusion 23 protruding toward the magnetic body 20 on one side of the bimetal 19. Forming or forming a protrusion 25 protruding toward the bimetal 19 on one side of the magnetic body 20, according to another embodiment of this is because the distance between the bimetal 19 and the magnetic body 20 is approaching, By the suction force is further enhanced by the bimetal 19 when the abnormal current is generated it is possible to cut off the current quickly.

상기한 바와 같이 본 발명은 회로차단기의 바이메탈에 인접하여 자성체를 형성하여 된 것으로, 이상전류 발생시에는 바이메탈의 가열로 회로차단기가 작동되어 전류를 차단하고, 상기 바이메탈의 가열에 의한 작동 시간을 기다릴 여유가 없는 대단히 큰 과대전류 발생시 자기장에 의한 바이메탈의 즉시 작동으로 전류가 신속하게 차단되어, 과대전류로부터 부하의 소손이나 전력설비의 손상이 극소화되는 등의 유용한 효과가 있다. As described above, the present invention is to form a magnetic material adjacent to the bimetal of the circuit breaker, and when an abnormal current is generated, the circuit breaker is operated by the heating of the bimetal to cut off the current, and the operation time by the heating of the bimetal is allowed to wait. In the case of a very large overcurrent without a current, the bimetal is immediately operated by the magnetic field, and the current is quickly cut off, thereby minimizing the damage of the load and damage to the power equipment from the overcurrent.

도 1은 종래 회로차단기를 도시한 사시도.1 is a perspective view showing a conventional circuit breaker.

도 2 a) 및 b)는 종래 회로차단기의 작동상태를 개략적으로 도시한 단면도.2 a) and b) are cross-sectional views schematically showing an operating state of a conventional circuit breaker.

도 3은 본 발명에 의한 회로차단기를 도시한 사시도.Figure 3 is a perspective view showing a circuit breaker according to the present invention.

도 4 a) 내지 c)는 본 발명에 의한 회로차단기의 작동상태를 도시한 설명도.4 a) to c) are explanatory diagrams showing an operating state of a circuit breaker according to the present invention;

도 5 내지 도 7은 본 발명에 의한 회로차단기의 다른 실시예를 도시한 단면도.5 to 7 are cross-sectional views showing another embodiment of the circuit breaker according to the present invention.

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10 : 회로차단기 11 : 몸체 12 : 커버10 circuit breaker 11 body 12 cover

13 : 개폐기구부 14 : 개폐핸들 15 : 회로기판13 opening and closing mechanism 14 opening and closing handle 15 circuit board

16 : 입력측 단자 17 : 부하측 단자 18 : 접점16 input terminal 17 load side terminal 18 contact

19 : 바이메탈 20 : 자성체 21 : 작동레버19: bimetal 20: magnetic material 21: operating lever

22 : 요입부 23,25 : 돌부22: recessed part 23, 25: protrusion

Claims (4)

몸체(11)의 내부에 입력측 단자(16)와 부하측 단자(17)를 접속하는 접점(18)과, 접점(18)을 차단 또는 접속시키는 개폐기구부(13)와, 이상전류를 감지하여 바이메탈(19)을 작동시키는 회로기판(15)과, 바이메탈(19)에 의하여 후퇴되며 개폐기구부(13)를 작동시키는 작동레버(21)로 된 공지의 회로차단기에 있어서,A contact 18 connecting the input terminal 16 and the load terminal 17 to the inside of the body 11, an opening / closing mechanism 13 for blocking or connecting the contact 18 and a bimetal (13) by detecting an abnormal current. In the known circuit breaker consisting of a circuit board 15 for activating 19 and an actuating lever 21 for retreating by the bimetal 19 and activating the opening and closing mechanism 13, 바이메탈(19)에 인접하여 작동레버(21) 방향으로 자성체(20)가 설치됨을 특징으로 하는 회로차단기.Circuit breaker, characterized in that the magnetic body 20 is installed in the direction of the operating lever 21 adjacent to the bimetal (19). 제 1 항에 있어서,The method of claim 1, 바이메탈(19)의 일측에 요입부(22)가 형성됨을 특징으로 하는 회로차단기.Circuit breaker, characterized in that the concave inlet portion 22 is formed on one side of the bimetal (19). 제 1 항에 있어서,The method of claim 1, 바이메탈(19)의 일측에 자성체(20) 측으로 돌출된 돌부(23)가 형성됨을 특징으로 하는 회로차단기.Circuit breaker, characterized in that the protrusion (23) protruding toward the magnetic body 20 side is formed on one side of the bimetal (19). 제 1 항에 있어서,The method of claim 1, 자성체(20)의 일측에 바이메탈(19) 측으로 돌출된 돌부(25)가 형성됨을 특징으로 하는 회로차단기.Circuit breaker, characterized in that the protrusion (25) protruding toward the bimetal (19) side is formed on one side of the magnetic body (20).
KR10-2003-0061918A 2003-09-04 2003-09-04 Excessive Current Circuit Breaker KR100522033B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100920826B1 (en) * 2007-07-25 2009-10-08 태성전기(주) Over Current Breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100920826B1 (en) * 2007-07-25 2009-10-08 태성전기(주) Over Current Breaker

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