KR910004126Y1 - Over current and leakage - Google Patents

Over current and leakage Download PDF

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Publication number
KR910004126Y1
KR910004126Y1 KR2019890001553U KR890001553U KR910004126Y1 KR 910004126 Y1 KR910004126 Y1 KR 910004126Y1 KR 2019890001553 U KR2019890001553 U KR 2019890001553U KR 890001553 U KR890001553 U KR 890001553U KR 910004126 Y1 KR910004126 Y1 KR 910004126Y1
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South Korea
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solenoid
trip
signal amplifier
current
overcurrent
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KR2019890001553U
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KR900016252U (en
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이상권
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주식회사 대 륙
김덕현
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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
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H2083/205—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition having shunt or UVR tripping device with integrated mechanical energy accumulator

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

내용 없음.No content.

Description

과전류 및 누전차단기Over Current and Earth Leakage Circuit Breaker

제 1 도는 종래의 과전류차단기의 내부 사시도.1 is an internal perspective view of a conventional overcurrent circuit breaker.

제 2a 도는 종래의 과전류차단기의 트립상태 개략설명도. 제 2b 도는 종래의 과전류차단기의 오프상태 개략설명도. 제 2c 도는 종래의 과전류차단기의 온상태 개략설명도.2A is a schematic diagram illustrating a trip state of a conventional overcurrent circuit breaker. 2b is a schematic diagram showing an off state of a conventional overcurrent circuit breaker. Figure 2c is a schematic illustration of the on state of a conventional overcurrent circuit breaker.

제 3 도는 본 고안의 내부사시도.3 is an internal perspective view of the present invention.

제 4 도는 본 고안 트립제어부의 회로구성도.4 is a circuit diagram of a trip control unit of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

30 : 트립바 70,71,72 : 차단접점30: trip bar 70, 71, 72: blocking contact

100 : 트립제어부 110 : 3상 정류부100: trip control unit 110: three-phase rectifier

120 : 검출신호증폭부 130 : 비교적분출력부120: detection signal amplifier 130: relatively divided output unit

140 : 영상신호증폭부 150 : 솔레노이드구동부140: video signal amplifier 150: solenoid drive unit

200 : 솔레노이드 300,301,302 : 변류기200: solenoid 300,301,302: current transformer

400 : 영상변류기 IC1-IC3: OP 앰프400: Current transformer IC 1 -IC 3 : OP amplifier

SCR1: 싸이리스터 D1-D15: 다이오드SCR 1 : Thyristor D 1 -D 15 : Diode

R1-R13: 저항 C1-C7: 콘덴서R 1 -R 13 : Resistor C 1 -C 7 : Capacitor

본 고안은 상용저압(600 V이하)선로상에 설치되는 전자식 과전류 미치 누전차단기에 관한 것이다.The present invention relates to an electronic overcurrent leakage circuit breaker installed on a commercial low voltage (600 V or less) line.

기존의 선로차단기는 바이메탈에 전류를 흘리고 여기에서 발생되는 열에 의한 바이메탈의 휨변화량을 이용하여 기계적으로 선로가 차단되도록 하는 열등식이 주류를 이루고 있었다.Conventional line breakers have been the mainstream of the inferiority equation that allows the current to flow through the bimetal and mechanically shut off the line by using the amount of bending of the bimetal due to the heat generated therein.

그러나, 열동식선로차단기는 주위의 온도변화나 습도변화에 따라 그 특성변화폭이 크기 때문에 장치의 신뢰성이 낮을 뿐만 아니라, 순시차단기능을 부여해주기 위해서는 별도의 구조를 추가해야 하는 문제점이 있었다.However, the thermal circuit breaker has a problem of having to add a separate structure to provide instantaneous blocking function as well as low reliability of the device because the characteristic change range is large according to ambient temperature change or humidity change.

이와같은 고전적 과전류차단기로부터 발전되어 선로상에 과전류에 의해 발생되는 전자기를 이용하여 유압포트(ODP)를 작동시킴으로써 과전류 선로가 차단되도록 하는 전자(電磁)식 3상선호차단기가 제 1 도에 도시되어 있다.An electronic three-phase circuit breaker is shown in FIG. 1 that generates an electric current from the classical overcurrent circuit breaker and operates the hydraulic port (ODP) using electromagnetic generated by the overcurrent on the line to block the overcurrent line. have.

이는 크게 접점스위칭부와 기계적 구성부와 과전류검출부로 구성된다.It is mainly composed of contact switch, mechanical component and overcurrent detector.

상기 접점스위칭부는 고정접점과 이동접점을 가지는 3개의 차단접점(70,71,72)으로 이루어지고, 상기 기계적 구동부는 핸들(10), 래치바(20), 트립바(30), 트립부(40) 및 턱(lug)(50)으로 구성되며, 상기 과전류검출부는 유압포트(ODP)(35) 및 트립바타격편(36)으로 구성된다.The contact switching unit is composed of three blocking contacts (70, 71, 72) having a fixed contact and a moving contact, the mechanical drive unit handle 10, latch bar 20, trip bar 30, trip unit ( 40) and a lug (50), wherein the overcurrent detection unit is composed of a hydraulic port (ODP) 35 and a trip bar strike piece 36.

이와같은 과전류선로차단기의 동작과정을 제 1 도와 제 2 도를 참고로 하여 설명하면, 트립상태에서는 이동접점(70")과 고정접점(70')이 열려있게 되고 또한 트립부(40)의 걸림턱에서 래치바(20)가 벗어나 있게 되므로, 핸들(10)에 외력을 가하여 온(ON)측(도면상의 좌측)에 위치시켜도 상기 이동접점(70")과 고정접점(70')은 접촉되지 않게 되며 또한 외력을 제거하면 상기 핸들(15)은 온과 오프(OFF)의 중간지점으로 복귀하게 된다. (제 2a 도).Referring to FIGS. 1 and 2, the operation of the overcurrent line circuit breaker will be described with reference to FIGS. 1 and 2. In the trip state, the movable contact 70 ″ and the fixed contact 70 ′ are opened, and the trip part 40 is caught. Since the latch bar 20 is removed from the jaw, the movable contact 70 "and the fixed contact 70 'are not in contact with the handle 10 even when the latch bar 20 is positioned on the ON side (left side of the drawing). In addition, when the external force is removed, the handle 15 returns to the midpoint of the on and off (OFF). (Figure 2a).

이와같은 상태에서 핸들(10)에 외력을 가하여 오프측(도면상의 우측)으로 이동시키면 핸들(10)에 결합된 턱(50)이 래치바(20)를 트립부(40)쪽으로 밀게되므로 트립부(40)의 걸림턱에서 상기 래치바(20)의 일단이 걸리게 된다. (제 2b 도).In such a state, when an external force is applied to the handle 10 and moved to the off side (right side in the drawing), the jaw 50 coupled to the handle 10 pushes the latch bar 20 toward the trip part 40. One end of the latch bar 20 is caught from the locking jaw of the 40. (Figure 2b).

이후, 상기 핸들(10)에 외력을 가하여 온측으로 이동시키면 핸들 중심축상에서 턱(50)에 설치된 스프링(90)이 절접레버(80)의 중심 결합축(60)을 당기게 되므로, 상기 절접레버(80)는 대략 일직선상에 놓여지면서 이동접점(70")이 고정접점(70')에 밀착접촉되게 된다.(제 2b 도).Thereafter, when the external force is applied to the handle 10 and moved to the on side, the spring 90 installed on the jaw 50 on the handle center axis pulls the center coupling shaft 60 of the cutting lever 80, thus the cutting lever ( 80 is placed in a substantially straight line such that the movable contact 70 "is in intimate contact with the fixed contact 70 '(FIG. 2B).

한편, 유압포트(35)에 권선된 과전류검출용 코일에 선로상의 과전류가 흐르게 되면 상기 유압포트(35)가 동작하여 그의 상부에 설치된 트립바 타격편(36)이 상기 트립바(30)를 쳐주게 되므로 래치바(20)가 트립부(40)의 걸림턱에서 빠져 나오게 된다.On the other hand, when the overcurrent on the line flows to the overcurrent detecting coil wound around the hydraulic port 35, the hydraulic port 35 is operated so that the trip bar striking piece 36 installed on the upper portion of the hydraulic port 35 hits the trip bar 30. Since the latch bar 20 is pulled out of the locking jaw of the trip unit 40.

따라서, 상기 턱(50)과 절접레버(80)의 중심결합축(60)사이의 스프링(90)의 복원력에 의해 이동접점(70")이 고정접점(70')으로부터 떨어지게 되므로 과전류선로가 차단되는 것이다.Therefore, the overcurrent line is blocked because the movable contact 70 "is separated from the fixed contact 70 'by the restoring force of the spring 90 between the jaw 50 and the center lever 60 of the cutting lever 80. Will be.

그러나, 이와같은 기존의 과전류선로차단기는 그것이 3상용인 경우, 각 상마다의 과전류를 검출하기 위한 3개의 유압포트 및 트립바 타격용 기구부(트립포인트)가 설치됨에 따라 차단기의 사이즈가 커지게 되고 제조원가가 상승되는 문제점이 있었다.However, if the conventional overcurrent line breaker is used for three phases, the size of the breaker becomes larger as three hydraulic ports and trip bar striking mechanism parts (trip points) are installed to detect overcurrent for each phase. There was a problem that the manufacturing cost is rising.

본 고안은 이와같은 문제점을 해결하기 위한 것으로, 과전류 및 누설전류 검출부를 전자(電子)적으로 구성하여 트립포인트를 단일화함으로써, 기존의 과전류선로차단기의 사이즈를 증가시키지 않으면서 누설전류 차단기능까지 부여할 수 있게 되는 과전류 및 누전차단기를 제공하는데 본 고안의 목적이 있는 것이다.The present invention is to solve such a problem, by providing an over-current and leakage current detection unit electronically to unify the trip point, to provide a leakage current blocking function without increasing the size of the existing over-current line circuit breaker It is an object of the present invention to provide an overcurrent and earth leakage breaker that can be made.

이하 첨부된 도면에 따라 본 고안을 설명하면 다음과 같다.Hereinafter, the present invention according to the accompanying drawings.

제 3 도에서 도시하고 있는 바와 같이, 유압포트설치부분에 유압포트대신 3개의 변류기(300,301,302)와 영상변류기(400)를 설치하고, 기계적 구동부 좌,우측에 각각 솔레노이드(200)와 트립제어부(100)를 설치한다.As shown in FIG. 3, three current transformers 300, 301, 302 and an image current transformer 400 are installed in the hydraulic port installation portion instead of the hydraulic port, and the solenoid 200 and the trip control unit 100 are respectively located on the left and right sides of the mechanical drive unit. Install).

상기 3개의 변류기(300,301,302)와 영상변류기(400)는, 제 4 도에 도시하고 있는 바와 같이, RST 선로와 UVW 선로를 각각 연결하는 차단접점(70,71,72)의 후단선로 즉, UVW 선로상에 설치된다.As illustrated in FIG. 4, the three current transformers 300, 301, 302 and the image current transformer 400 are trailing lines of the blocking contacts 70, 71, and 72 that connect the RST line and the UVW line, that is, UVW. It is installed on the track.

상기 각 변류기(300,301,302)에 의해 검출되는 선로상의 과전류 검출신호는 다이오드(D1-D6)로 구성된 3상정류부(110)를 통하여 검출신호증폭부(120)로 제공되게 연결한다.The overcurrent detection signal on the line detected by each of the current transformers 300, 301, and 302 is connected to the detection signal amplifier 120 through a three-phase rectifier 110 including diodes D 1 -D 6 .

상기 검출신호증폭부(120)는 3상정류부(110)의 출력이 저항(R1,R2)으로 분배된 후 콘덴서(C1)를 통하여 OP앰프(IC1)의 넌인버팅단자로 입력되게 연결하고, 상기 OP앰프(IC1)의 인버팅단자에는 저항(R4) 및 콘덴서(C2)을 통하여 궤환하는 OP앰프(IC1)의 출력신호가 입력되게 연결한다.The detection signal amplifier 120 is configured such that the output of the three-phase rectifier 110 is distributed to the resistors R 1 and R 2 and then input to the non-inverting terminal of the OP amplifier IC 1 through the capacitor C 1 . connection, and connecting the output signal of the OP amplifier, the inverting terminal of the (IC 1) resistance (R 4) and a condenser OP amplifiers (IC 1) which feeds back through a (C 2) is inputted.

상기 검출신호증폭부(120)의 출력은 비교적분 출력부(130)를 통하여 다이오드(D8)을 거친 후, 다이오드(D7)를 통하여 직접 출력되는 상기 검출신호증폭부(120)의 출력과 함께 솔레노이드구동부(150)로 제공되게 연결한다.The output of the detection signal amplifier 120 passes through the diode D 8 through the relatively minute output unit 130, and then outputs the output of the detection signal amplifier 120 directly output through the diode D 7 . Connect to be provided together with the solenoid drive unit 150.

상기 비교적분출력부(130)는 검출신호증폭부(120)의 출력이 가변저항(VR1) 및 저항(R4)을 거쳐 OP앰프(IC2)의 넌인버팅단자로 입력되게 연결하고, 상기 OP앰프(IC2)의 인버팅단자에는 저항(R5,R6)으로 분배되는 기준전압이 적분시간조절용 가변저항(VR2)을 통하여 입력되게 연결하며, 또한 다이오드(D15)와 콘덴서(C3)의 병렬회로를 통하여 적분궤환되는 상기 OP앰프(IC2)의 출력도 동시에 입력되게 연결한다.The relatively divided output unit 130 is connected such that the output of the detection signal amplifier 120 is input to the non-inverting terminal of the OP amplifier IC 2 through the variable resistor VR 1 and the resistor R 4 . The inverting terminal of the OP amplifier IC 2 is connected to the reference voltage divided by the resistors R 5 and R 6 so as to be inputted through the variable resistor VR 2 for integrating time adjustment, and also a diode D 15 and a capacitor ( Through the parallel circuit of C 3 ), the output of the OP amplifier IC 2 , which is integrated and fed back, is also connected at the same time.

영상변류기(400)의 검출신호는 영상신호증폭부(140)와 다이오드(D9)를 통하여 상기 솔레노이드구동부(150)로 제공되게 연결한다.The detection signal of the image current transformer 400 is connected to be provided to the solenoid driver 150 through the image signal amplifier 140 and the diode D 9 .

상기 영상신호증폭부(140)는 영상변류기(400)에서 검출된 신호 또는 시험버튼(SW1)에 의한 시험신호가 저항(R7,R8) 및 콘덴서(C4)를 통하여 OP앰프(IC3)의 넌인버팅단자로 입력되게 연결하고, 상기 OP앰프(IC3)의 인버팅단자에는 저항(R10) 및 콘덴서(C5)를 통한 OP앰프(IC3)의 출력신호가 궤환되어 입력되게 연결한다.The image signal amplifier 140 is a signal detected by the current transformer 400 or the test signal by the test button (SW 1 ) through the resistor (R 7 , R 8 ) and the capacitor (C 4 ) OP amplifier (IC) 3) the input of the associated inputted to neonin inverting terminal and the output signal is fed back of the inverting terminal of the resistor (R 10), and OP amplifiers (IC 3) via a capacitor (C 5) of the OP amplifier (IC 3) Connect it.

또한, 상기 솔레노이드구동부(150)는, 상기 검출신호증폭부(120)와 비교적분출력부(130)와 영상신호증폭부(140)의 출력이 다이오드(D7-D8)로 오어링된 후 저항(R11) 및 제너다이오드(ZD1)를 통하여 싸이리스터(SCR1)의 게이트로 입력되게 연결하고, 상기 솔레노이드 구동부(150)에 의해 구동되는 솔레노이드(200)는, 제 3 도에서 도시하고 있는 바와 같이 그의 트립바제어편(210)이 트립바(30)를 잡아당겨 상기 기계적구동부가 트립상태로 돌입되게함으로써 3상선로가 차단되게 구성한다.In addition, the solenoid driving unit 150, the output of the detection signal amplifier 120, the relatively divided output unit 130 and the image signal amplifier 140 after being ordered to the diode (D 7 -D 8 ) The solenoid 200 connected to the gate of the thyristor SCR 1 through the resistor R 11 and the zener diode ZD 1 and driven by the solenoid driver 150 is illustrated in FIG. 3. As it is, the trip bar control piece 210 pulls the trip bar 30 so that the mechanical driving part enters the trip state so that the three-phase line is blocked.

또한, 3상선로에서 인출되는 2상은 전원부(160)의 다이오드(D11-D14), 제너다이오드(ZD2,ZD3) 및 콘덴서(C6,C7)등으로 정류된 후 상기 솔레노이드(200) 및 각부에 전원전압으로 제공되게 연결하여 구성한다.Also, the two phases drawn from the three-phase line are rectified by the diodes D 11 -D 14 , the zener diodes ZD 2 , ZD 3 , the capacitors C 6 , C 7 , and the like of the power supply unit 160. 200) and connected to each part to be provided with a power supply voltage.

도면중 미설명부호 D10은 솔레노이드의 역기전력 방전용 다이오드이다.In the figure, reference numeral D 10 denotes a diode for the counter electromotive force discharge of the solenoid.

이와같이 구성된 본 고안의 작용 및 효과를 상세히 설명하면 다음과 같다.Referring to the operation and effects of the present invention configured as described above in detail.

제 4 도에서, 차단접점(70,71,72)후단의 3상선로중 2상에서 인출되는 전압은 전원부(160)의 브릿지다이오드(D11-D14)로 정류되어 솔레노이드(200)의 구동전압으로 인가되고 또한 상기 브릿지다이오드(D11-D14)를 거친 직류전압은 저항(R13), 제너다이오드(ZD2,ZD3) 및 콘덴서(C6,C7)를 평활되어 각부에 전원전압으로 인가된다.In FIG. 4, the voltage drawn from the two phases of the three-phase line after the blocking contacts 70, 71, and 72 is rectified to the bridge diodes D 11- D 14 of the power supply unit 160 to drive voltage of the solenoid 200. DC voltage applied through the bridge diodes (D 11 -D 14 ) and smoothed through the resistors (R 13 ), zener diodes (ZD 2 , ZD 3 ) and capacitors (C 6 , C 7 ) Is applied.

이후 3상선로상에 과전류가 흐르게 되면 변류기(300,301,302)가 이를 검출하여 3상정류부(110)에 제공하게 된다.Then, when the overcurrent flows on the three-phase line, the current transformers 300, 301 and 302 detect this and provide the three-phase rectifier 110.

3상정류부(110)에서 3상정류된 과전류검출신호는 검출신호증폭부(120)의 저항(R1,R2) 및 콘덴서(C1)를 거쳐 OP앰프(IC1)에서 증폭된다.The three-phase rectifier 110 rectifies the three-phase rectified overcurrent detection signal through the resistors R 1 and R 2 and the capacitor C 1 of the detection signal amplifier 120 and is amplified by the OP amplifier IC 1 .

상기 검출신호증폭부(120)에서 증폭된 검출신호는 비교적분 출력부(130)의 가변저항(VR1) 및 저항(R4)으로 분배되어 OP앰프(IC2)의 넌인버팅단자로 입력되는데, 이때 가변저항(VR1)의 저항값을 조절하는 것으로 검출신호의 레벨을 설정할 수 있게 된다.The detection signal amplified by the detection signal amplifier 120 is distributed to the variable resistor VR 1 and the resistor R 4 of the relatively minute output unit 130 and input to the non-inverting terminal of the OP amplifier IC 2 . At this time, the level of the detection signal can be set by adjusting the resistance of the variable resistor VR 1 .

또한, 상기 OP앰프(IC2)에서 그의 넌인버팅단자로 입력되는 검출신호를 비교출력하는 데는, 그의 인버팅단자의 입력신호, 즉 가변저항(VR2)과 콘덴서(C3)로 결전되는 시정수에 의한 적분 시간이 걸리게 된다.In addition, the comparative outputting of the detection signal input from the non-inverting terminal of the op amp IC 2 is performed by the input signal of the inverting terminal thereof, that is, the correction of the variable resistor VR 2 and the capacitor C 3 . It takes time to integrate by number.

따라서, 부하에 대한 파워의 온,오프순간등에서 나타날 수 있는 순간적인 특정시간동안의 과전류는 상기 가변저항(VR2)의 조절로써 비교적분출력부(130)에서 검출되는 것이 무시되게 할 수 있으므로 불필요한 선로차단을 방지할 수 있게 된다.Therefore, the instantaneous overcurrent during a specific time which may appear in the on / off moment of the power to the load may cause the detection of the relatively minute output unit 130 to be ignored by the control of the variable resistance VR 2 . It is possible to prevent the line blocking.

즉, 시한트립특성의 조절이 가능하게 된다.That is, the time trip characteristic can be adjusted.

한편, 지속적인 과전류상태에 따른 비교적분출력부(130)의 출력은 다이오드(D8)를 통하여 솔레노이드구동부(150)로 출력되며, 상기 출력이 제너다이오드(ZD1)의 제너전압을 초과할 때 턴온되는 싸이리스터(SCR1)에 의하여 솔레노이드(200)가 구동된다.On the other hand, the output of the relatively divided output unit 130 according to the continuous overcurrent state is output to the solenoid driver 150 through the diode (D 8 ), when the output exceeds the zener voltage of the zener diode (ZD 1 ) is turned on The solenoid 200 is driven by the thyristor SCR 1 .

따라서, 트립바제어편(210)이 트립바(30)를 잡아당겨 기계적구동부를 트립상태로 돌입시키게되므로 3상의 차단접점(70,71,72)이 열려 과전류상태의 선로가 차단되게 된다.Therefore, since the trip bar control piece 210 pulls the trip bar 30 and enters the mechanical driving part in the trip state, the three-phase blocking contacts 70, 71, and 72 are opened to block the overcurrent line.

이때, 선로상에서 과다한 전류의 증가가 나타나면 검출신호증폭부(120)의 출력도 커지게 되는데, 이 경우에는 상기 검출신호증폭부(120)의 과대한 출력신호가 직접다이오드(D7)를 거쳐 솔레노이드구동부(150)에 제공되므로, 비교적분출력부(130)에서의 지연시간을 가지지 않고 솔레노이드(200)가 구동되어 3상선로를 즉시 차단하게 된다.At this time, when an excessive increase in current occurs on the line, the output of the detection signal amplifier 120 also becomes large. In this case, the excessive output signal of the detection signal amplifier 120 passes through the direct diode D 7 to the solenoid. Since it is provided to the driving unit 150, the solenoid 200 is driven without having a delay time in the relatively minute output unit 130 to immediately cut off the three-phase line.

한편, 영상변류기(400)는 선로상에서 누설전류가 있을 때 차신호를 발생하게 된다.On the other hand, the image current transformer 400 generates a difference signal when there is a leakage current on the line.

또한, 시험버튼(SW1)을 이용하여서도 차신호를 발생시킬 수도 있다.The difference signal can also be generated using the test button SW 1 .

이는 영상신호증폭부(140)에서 증폭된 후 다이오드(D9)를 통하여 솔레노이드구동부(150)로 출력되므로, 앞에서 설명한 바와 같이 솔레노이드(200)가 구동되어 누전선로를 차단하게 된다.Since it is amplified by the image signal amplifier 140 and output to the solenoid driving unit 150 through the diode (D 9 ), as described above, the solenoid 200 is driven to block the leakage line.

따라서, 검출신호증폭부(120)에서 직접출력되는 과전류 신호와, 영상신호증폭부(140)에서 출력되는 누전신호가 각각의 오어링 다이오드(D7-D9)로 오어링된 후 솔레노이드구동부(150)에 제공되므로, 이상상태의 3상선로를 차단하게 되는 트립포인트를 1개의 솔레노이드(200)로 단일화 할 수 있게 되는 것이다.Therefore, after the overcurrent signal directly output from the detection signal amplifier 120 and the leakage signal output from the image signal amplifier 140 are ORed to each oring diode D 7 -D 9 , the solenoid driving unit ( Since it is provided to 150, it is possible to unify the trip point that blocks the three-phase line in the abnormal state with one solenoid 200.

이상에서 설명한 바와 같은 본 고안은 누전 및 과전류차단기를 완전전자화 함으로써, 진동이나 부착방향에 대한 영향 및 주변온도나 습도등에 의한 고려를 거의 배제할 수 있게 되고 또한 차단장치의 소형화, 경량화 및 신뢰도향상을 가져올 수 있게 되며, 특히, 제품의 정격, 예를들면 시한트립 특성이나 검출전류의 크기등의 조절이 용이하기 때문에 단일라인에서 제조된 동일제품에 다양한 정격을 부여하여 출하할 수 있게 되므로 생산성의 획기적 향상 효과를 가져오게 되는 것이다.As described above, the present invention can completely eliminate the effects of vibration, the direction of attachment, and the consideration of the ambient temperature and humidity by fully electronicizing the circuit breaker and the overcurrent circuit breaker, and further reducing the size, weight, and reliability of the circuit breaker. In particular, it is easy to control the rating of the product, for example, the time tripping characteristic and the magnitude of the detection current, so that the same product manufactured in a single line can be shipped with various ratings, resulting in a breakthrough in productivity. It will bring an improvement.

Claims (1)

3상선로상의 과전류 및 누설전류차단기에 있어서, 차단기내에 트립제어부, 솔레노이드, 변류기, 영상변류기를 실장하고, 상기 트립제어부를, 상기 변류기에서 검출되는 과전류신호는 3상정류부를 거쳐 검출신호증폭부에서 증폭된 후 비교적분 출력부로 제공되게 연결하고, 상기 영상변류기에서 검출된 누전신호는 영상신호증폭부로 제공되게 연결하고, 상기 검출신호증폭부와 비교적분출력부와 영상신호증폭부의 출력은 각각의 오어링 다이오드를 거쳐 솔레노이드구동부로 제공되게 연결하여 구성하고, 상기 트립제어부의 솔레노이드구동부에 의해 구동되는 상기 솔레노이드가 기계적구동부의 트립바를 제어하게 구성하는 것을 특징으로 하는 과전류 및 누전차단기.In the over-current and leakage current circuit breaker on a three-phase line, a trip control unit, a solenoid, a current transformer, and a video current transformer are mounted in the breaker, and the trip control unit and the over-current signal detected by the current transformer pass through a three-phase rectifier to the detection signal amplifier. After the amplification is connected to provide a relatively minute output unit, the leakage signal detected by the image current transformer is connected to provide an image signal amplifier, and the output of the detection signal amplifier, the relatively divided output unit and the image signal amplifier And a solenoid driving unit connected to the solenoid driving unit via an arresting diode, wherein the solenoid driven by the solenoid driving unit of the trip control unit controls the trip bar of the mechanical driving unit.
KR2019890001553U 1989-02-15 1989-02-15 Over current and leakage KR910004126Y1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101384422B1 (en) * 2012-02-29 2014-04-10 미쓰비시덴키 가부시키가이샤 Earth leakage breaker

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100782300B1 (en) * 2007-07-23 2007-12-06 이한식 Apparatus for breaking circuit sensing reverse leakage current

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101384422B1 (en) * 2012-02-29 2014-04-10 미쓰비시덴키 가부시키가이샤 Earth leakage breaker

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