KR20020041973A - Breaker for a leakage of electrocity - Google Patents

Breaker for a leakage of electrocity Download PDF

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Publication number
KR20020041973A
KR20020041973A KR1020000071653A KR20000071653A KR20020041973A KR 20020041973 A KR20020041973 A KR 20020041973A KR 1020000071653 A KR1020000071653 A KR 1020000071653A KR 20000071653 A KR20000071653 A KR 20000071653A KR 20020041973 A KR20020041973 A KR 20020041973A
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KR
South Korea
Prior art keywords
leakage
relay switch
earth leakage
overvoltage
power
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Application number
KR1020000071653A
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Korean (ko)
Inventor
오충민
Original Assignee
구자홍
엘지전자주식회사
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Priority to KR1020000071653A priority Critical patent/KR20020041973A/en
Publication of KR20020041973A publication Critical patent/KR20020041973A/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/06—Arrangements for supplying operative power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/044—Checking correct functioning of protective arrangements, e.g. by simulating a fault
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
    • H02H3/162—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass for ac systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H02H3/334—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control
    • 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

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

Abstract

PURPOSE: An earth leakage breaker is provided to improve the safety of the earth leakage breaker by employing a line filter. CONSTITUTION: A relay switch(210) breaks power in current leakage or over voltage. A line filter(220) eliminates noise from the power inputted through the relay switch(210) and detects leakage current. A leakage/over voltage detecting unit(230) detects whether the inputted power is over voltage or not, and electromotive force induced on an inductor of the line filter(220) in order to detect leakage current generation, in case of detecting the leakage current or over voltage, operates the relay switch(210) to break the inputted power. The line filter(220) is an EMI(electromagnetic interference) filter for eliminating COMMON MODE noise.

Description

누전 차단기{BREAKER FOR A LEAKAGE OF ELECTROCITY}Earth Leakage Circuit Breaker {BREAKER FOR A LEAKAGE OF ELECTROCITY}

본 발명은 영상 표시 장치에 관한 것으로 특히, PDP(Plasma Display Panel)에 있어서 누전 차단기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video display device, and more particularly, to an earth leakage breaker in a plasma display panel (PDP).

통상적으로 티브이는 과전류가 흐를 경우 이를 차단하기 위한 퓨즈가 있지만 이상 전원에 의해 발생하는 누전을 차단하기 위한 기술은 적용되어 있지 않다.Generally, TVs have a fuse to block an over current, but a technique for blocking a short circuit caused by an abnormal power supply is not applied.

그러나, 최근 가정용 티브이는 대형화되면서 대전력을 필요로 한다.However, as household TVs become larger in recent years, they require large power.

특히, 대전력을 필요로 하는 PDP 티브이의 경우 티브이 외관 및 내부 구성이 기존의 티브이와는 달리 절연체가 아니라 도전체로 이루어져 있기 때문에 이상 전원에 의한 누전을 차단하기 위한 기능을 필요로 한다.In particular, in the case of a PDP TV that requires a large power, the TV external and internal configuration is made of a conductor, not an insulator, unlike a conventional TV, and thus requires a function to block a short circuit caused by an abnormal power supply.

이를 위하여 전원 입력 부분에 누전 차단기를 설치하여 누전으로 인한 화재 및 인명 감전 사고를 예방한다.To this end, an earth leakage breaker is installed at the power input to prevent fire and human electric shock due to an electric leakage.

일반적으로 누전 차단기는 부하에 일정 이상의 누전 전류가 발생하거나 부하에 과전류가 공급될 때 이를 자동으로 감지하여 부하에 공급되는 전원을 차단함과 동시에 급속히 누설 전류가 상승할 때 이를 차단하는 역할을 한다.In general, an earth leakage breaker automatically detects when a certain leakage current occurs in the load or when an over current is supplied to the load, and cuts off the power supply to the load, and at the same time, it blocks the leakage current rapidly rising.

도1은 종래의 단상 3선식 중성선 결상 보호부착 누전 차단기의 회로도로서 이에 도시된 바와 같이, 3상 입력 전원의 부하측 공급을 차단하기 위한 릴레이 스위치(110)와, 이 릴레이 스위치(110)를 통해 부하측으로 공급되는 전원의 전류 균형 붕괴를 감지하기 위한 영상 변류기(ZCT)(120)와, 이 영상 변류기(120)에서의기전력을 점검하여 누설 전류 유무를 검출함은 물론 부하측으로 공급되는 전압을 점검하여 과전압 여부를 검출하고 누설 전류 또는 과전압이 검출된 경우 상기 릴레이 스위치(110)를 동작시키는 누전/과전압 검출부(130)가 구비되어 구성된다.1 is a circuit diagram of a conventional single-phase three-wire neutral circuit breaker with a circuit breaker with protection, as shown therein, a relay switch 110 for interrupting the load side supply of a three-phase input power supply, and a load side through the relay switch 110. An image current transformer (ZCT) 120 for detecting a current balance breakdown of the power supplied to the power supply, and an electromotive force in the image current transformer 120 detects the presence or absence of a leakage current, and also checks the voltage supplied to the load side. It is configured to detect whether the leakage current or overvoltage is provided with an earth leakage / overvoltage detection unit 130 for operating the relay switch 110.

도면의 미설명 부호 '140'은 누전 검출시 이를 표시하기 위한 누전 표시부이고, '150'은 누전 검사를 위해 누전/과전압 검출부(130)를 강제적으로 동작시키기 위한 테스트 버튼이다.In the drawing, reference numeral 140 denotes an electric leakage display unit for displaying the electric leakage detection, and a reference numeral 150 denotes a test button for forcibly operating the electric leakage / overvoltage detection unit 130 for an electric leakage inspection.

이와같은 종래 기술의 동작 과정을 설명하면 다음과 같다.Referring to the operation of the prior art as follows.

정상 동작하는 경우 릴레이 스위치(110)가 온 상태를 유지하므로In the normal operation, the relay switch 110 is kept on

입력 전원측에서 유입된 전류는 영상 변류기(120)를 통해 부하측으로 공급하게 된다.The current introduced from the input power supply side is supplied to the load side through the image current transformer 120.

이때, 누전/과전압 검출부(130)는 영상 변류기(120)를 통해 입력 전압측에서의 전류를 검출하여 그 전류의 벡터합이 '0'이 되는지 판단하면서 상기 영상 변류기(120)의 2차측 전압이 일정값 이상인지를 판단하게 된다.At this time, the ground fault / overvoltage detector 130 detects a current on the input voltage side through the image current transformer 120 and determines whether the vector sum of the currents becomes '0' while the secondary voltage of the image current transformer 120 has a predetermined value. It is judged whether it is abnormal.

만일, 영상 변류기(120)를 통과하는 전류의 벡터합이 '0'이 아닐 경우 그 영상 변류기(120)의 2차측 전압이 일정 레벨값 이상이면 누전/과전압 검출부(130)는 릴레이 스위치(110)를 작동시켜 입력 전원을 차단하게 된다.If the vector sum of the current passing through the image current transformer 120 is not '0', when the secondary voltage of the image current transformer 120 is higher than or equal to a predetermined level value, the short-circuit / overvoltage detector 130 may relay the switch 110. To turn off the input power.

즉, 종래의 누전 차단기는 입력 전원의 각 상에 흐르는 전류에 의하여 유기되는 자속이 서로 같지 않아 불평형이 생길 때 영상 변류기(120)의 2차측 권선에 기전력이 유기되는데, 이 기전력이 일정 레벨값 이상이면 누전/과전압 검출부(130)가 릴레이 스위치(110)를 동작시켜 부하측으로 공급되는 입력 전압을 차단하게 된다.That is, in the conventional earth leakage breaker, when the magnetic flux induced by the current flowing in each phase of the input power is not equal to each other and an unbalance occurs, electromotive force is induced in the secondary winding of the image current transformer 120, and the electromotive force is above a predetermined level value. When the ground fault / overvoltage detector 130 operates the relay switch 110 to block the input voltage supplied to the load side.

그러나, 종래 기술은 누전 발생시 트립시키는 기능을 구비하지만 전원 잡음을 제거하지 못하여 시스템의 오동작을 유발시킬 수 있는 단점이 있다.However, although the prior art has a function of tripping when a short circuit occurs, there is a drawback that a malfunction of the system may be caused by failure to remove power supply noise.

따라서, 본 발명은 종래의 단점을 개선하기 위하여 누전 여부를 감지함은 물론 전원 잡음을 제거하도록 라인 필터를 채용함으로써 시스템의 안정성을 확고히 하도록 창안한 누전 차단기를 제공함에 목적이 있다.Accordingly, an object of the present invention is to provide an earth leakage circuit breaker designed to secure the stability of a system by employing a line filter to detect power leakage as well as to eliminate power supply noise in order to improve the disadvantages of the related art.

도1은 종래의 누전 차단기를 보인 회로도.1 is a circuit diagram showing a conventional earth leakage breaker.

도2는 본 발명의 실시예를 위한 누전 차단기의 회로도.2 is a circuit diagram of an earth leakage breaker for an embodiment of the present invention.

도3은 본 발명의 실시예에서 누전 차단을 위한 동작 순서도.Figure 3 is an operation flowchart for the short circuit break in the embodiment of the present invention.

* 도면의 주요부분에 대한 부호 설명 *Explanation of symbols on the main parts of the drawings

210 : 릴레이 스위치220 : 라인 필터210: relay switch 220: line filter

230 : 누전/과전압 검출부230: earth leakage / overvoltage detector

본 발명은 상기의 목적을 달성하기 위하여 누전 차단기와 EMI 필터를 일체화함을 특징으로 한다.The present invention is characterized by integrating an earth leakage breaker and an EMI filter to achieve the above object.

즉, 본 발명은 누전 또는 과전압 발생시 전원을 차단하기 위한 릴레이 스위치와, 전원 잡음 제거 및 누설 전류를 감지하기 위한 EMI 필터와, 이 EMI 필터의 코일에 유기되는 기전력이 일정 레벨값 이상이면 상기 릴레이 스위치를 동작시켜 입력 전원을 차단하는 누전/과전압 검출부를 구비하여 구성함을 특징으로 한다.That is, the present invention provides a relay switch for shutting off a power supply when a short circuit or overvoltage occurs, an EMI filter for detecting power supply noise and leakage current, and an electromotive force induced in a coil of the EMI filter is greater than or equal to a predetermined level value. It characterized in that it comprises a short-circuit / over-voltage detection unit for operating the cut off the input power.

이하, 본 발명을 도면에 의거 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the drawings.

도2는 본 발명의 실시예에 의한 장치의 블럭도로서 이에 도시한 바와 같이, 누전 또는 과전압 발생시 전원을 차단하기 위한 릴레이 스위치(210)와, 이 릴레이 스위치(210)을 통해 입력되는 전원에서 잡음을 제거함과 동시에 누설 전류를 감지하기 위한 라인 필터(220)와, 이 라인 필터(220)로의 입력 전원이 과전압인지를 검출하면서 누설 전류 발생을 감지하기 위하여 상기 라인 필터(220)의 인덕터에 유기되는 기전력을 검출하고 누설 전류 또는 과전압을 검출한 경우 상기 릴레이 스위치(210)를 동작시켜 입력 전원을 차단하는 누전/과전압 검출부(230)를 구비하여 구성한다.2 is a block diagram of an apparatus according to an embodiment of the present invention, as shown therein, a relay switch 210 for disconnecting power in the event of a short circuit or an overvoltage, and noise in the power input through the relay switch 210. And a line filter 220 for detecting a leakage current and detecting an occurrence of leakage current while detecting whether an input power to the line filter 220 is an overvoltage, and induced in an inductor of the line filter 220 to detect leakage current. When the electromotive force is detected and the leakage current or the overvoltage is detected, the earth leakage / overvoltage detection unit 230 is configured to operate the relay switch 210 to cut off the input power.

상기 라인 필터(220)는 COMMON MODE 잡음을 제거하는 EMI 필터로서, 접지 저항이 작아지도록 2개의 인덕터가 평형을 이루도록 구성한다.The line filter 220 is an EMI filter that removes common mode noise, and is configured such that two inductors are balanced to reduce ground resistance.

도면의 미설명 부호 '240'은 누전 검출시 이를 표시하기 위한 누전 표시부이고, '250'은 중성선 결상으로 인한 기기의 소손을 방지하기 위하여 중성선에 접속하기 위한 과전압 검출 리드선이다.In the drawing, reference numeral 240 denotes an electric leakage display unit for displaying the electric leakage detection, and reference numeral 250 denotes an overvoltage detection lead wire connected to the neutral wire in order to prevent the device from being burned out due to the formation of the neutral wire.

이와같이 구성한 본 발명의 실시예에 대한 동작 및 작용 효과를 도3의 동작 순서도를 참조하여 설명하면 다음과 같다.The operation and the effect of the embodiment of the present invention configured as described above will be described with reference to the operation flowchart of FIG. 3.

정상 동작하는 경우 릴레이 스위치(210)가 온 상태를 유지하므로 라인 필터(220)는 입력 전원의 잡음을 제거한 후 부하측으로 공급하게 된다.In the normal operation, since the relay switch 210 maintains the on state, the line filter 220 removes the noise of the input power and supplies the load to the load side.

이때, 누전/과전압 검출부(230)는 라인 필터(220)의 인덕터에 유기된 기전력을 검출하여 일정 레벨값 이상인지를 판단하게 된다.At this time, the ground fault / overvoltage detector 230 detects the electromotive force induced in the inductor of the line filter 220 to determine whether or not the predetermined level value.

만일, 절연 불량 등으로 지락 전류가 발생되면 라인 필터(220)의 인덕터를 통과하는 전류의 벡터합이 '0'이 되지 않기 때문에 그때의 지락 전류에 의한 자속에 의해 상기 인덕터에 기전력이 유기되게 된다.If a ground current is generated due to poor insulation, the vector sum of the current passing through the inductor of the line filter 220 does not become '0', so that electromotive force is induced in the inductor by the magnetic flux caused by the ground fault current. .

이에 따라, 누전/과전압 검출부(230)는 라인 필터(220)에 유기된 기전력을 검출하여 일정 레벨값 이상으로 판단하면 릴레이 스위치(210)를 작동시켜 입력 전원을 차단하면서 누전 표시부(240)를 점등시키게 된다.Accordingly, when the leakage / overvoltage detection unit 230 detects the electromotive force induced by the line filter 220 and judges that the predetermined level value is higher than or equal to a predetermined level value, the ground leakage display unit 240 turns on while operating the relay switch 210 to cut off the input power. Let's go.

즉, 본 발명은 이상 전원을 검출하면 릴레이 스위치(210)를 동작시켜 입력 전원을 차단하고 이상 전원이 검출되지 않으면 라인 필터(220)에서 입력 전원에 포함된 전자파를 제거한 후 부하측으로 공급하게 된다.That is, in the present invention, when the abnormal power is detected, the relay switch 210 operates to cut off the input power, and when the abnormal power is not detected, the line filter 220 removes the electromagnetic wave included in the input power and supplies the load to the load side.

또한, 전원선이 단상 교류 3선식인 경우 중성선 결상에 의한 기기의 소손 사고를 방지하기 위하여 누전/과전압 검출부(230)로부터의 과전압 검출 리드선(250)을 외부로 인출하여 구성함으로써 그 과전압 검출 리드선(250)을 단상 3선의 중성선에 접속할 수 있게 한다.In addition, when the power supply line is a single-phase AC three-wire type, the overvoltage detection lead wire 250 from the ground fault / overvoltage detection unit 230 is drawn out to the outside to prevent the burnout of the device due to the neutral wire imaging. 250) can be connected to a single-phase, three-wire neutral.

상기에서 상세히 설명한 바와 같이 본 발명은 누전 차단기와 EMI 필터를 일체화하여 구성함으로써 이상 전원을 차단하여 화재 및 감전 사고를 예방함은 물론 전자파를 제거하여 안정된 전원을 공급함으로써 시스템의 오동작을 방지할 수 있는 효과가 있다.As described in detail above, the present invention may be configured by integrating an earth leakage breaker and an EMI filter to prevent abnormal power supply, thereby preventing fire and electric shock, as well as eliminating electromagnetic waves, thereby providing a stable power supply to prevent malfunction of the system. It works.

Claims (3)

누전 또는 과전압 발생시 전원을 차단하기 위한 릴레이 스위치와, 전원 잡음 제거 및 누설 전류를 감지하기 위한 EMI 필터와, 이 EMI 필터의 코일에 유기되는 기전력이 일정 레벨값 이상이면 상기 릴레이 스위치를 동작시켜 입력 전원을 차단하는 누전/과전압 검출부로 구성하여 누전 차단 기능과 EMI 제거 기능을 구비하도록 함을 특징으로 하는 누전 차단기.Relay switch to cut off power in case of short circuit or over voltage, EMI filter to detect power supply noise and leakage current, and if the electromotive force induced in coil of this EMI filter is above a certain level, operate the relay switch to input power An earth leakage circuit breaker, characterized in that it comprises an earth leakage / overvoltage detection unit for blocking the electric leakage blocking function and EMI elimination function. 제1항에 있어서, 누전/과전압 검출부는 EMI 필터로의 입력 전원을 점검하여 과전압 여부를 검출하도록 구성함을 특징으로 하는 누전 차단기.The earth leakage circuit breaker of claim 1, wherein the earth leakage / overvoltage detection unit is configured to detect an overvoltage by checking an input power supply to the EMI filter. 제1항에 있어서, 누전/과전압 검출부로부터의 과전압 검출 리드선을 배전선의 중성선에 연결되도록 구성하여 중성선 결상으로 인한 기기의 소손을 방지하도록 함을 특징으로 하는 누전 차단기.The circuit breaker according to claim 1, wherein the overvoltage detection lead from the ground fault / overvoltage detector is connected to the neutral line of the distribution line to prevent burnout of the device due to the formation of the neutral line.
KR1020000071653A 2000-11-29 2000-11-29 Breaker for a leakage of electrocity KR20020041973A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100501419B1 (en) * 2002-10-30 2005-07-18 한국전력공사 The circuit-breaker for earth leakage and overvoltage
KR100673588B1 (en) * 2004-12-03 2007-01-24 대성전기공업 주식회사 Leakage current detect interruptor
KR100712672B1 (en) 2005-09-20 2007-05-02 세기이테크 주식회사 Self-returnable electronic leakage circuit breaker having integrated double switch
KR100825851B1 (en) * 2006-02-15 2008-04-29 후지 덴키 기기세이교 가부시끼가이샤 Earth leakage breaker
KR100841564B1 (en) * 2007-11-08 2008-06-26 에이치제이산전(주) Illuminator having circuit protection part
EP1793466A3 (en) * 2005-11-30 2016-08-24 Mitsubishi Denki Kabushiki Kaisha Circuit-breakers incorporating residual current protection
CN112134254A (en) * 2020-09-17 2020-12-25 许继电源有限公司 Hot-plug supporting open-circuit-proof sampling protection circuit and method and harmonic compensation device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100501419B1 (en) * 2002-10-30 2005-07-18 한국전력공사 The circuit-breaker for earth leakage and overvoltage
KR100673588B1 (en) * 2004-12-03 2007-01-24 대성전기공업 주식회사 Leakage current detect interruptor
KR100712672B1 (en) 2005-09-20 2007-05-02 세기이테크 주식회사 Self-returnable electronic leakage circuit breaker having integrated double switch
EP1793466A3 (en) * 2005-11-30 2016-08-24 Mitsubishi Denki Kabushiki Kaisha Circuit-breakers incorporating residual current protection
KR100825851B1 (en) * 2006-02-15 2008-04-29 후지 덴키 기기세이교 가부시끼가이샤 Earth leakage breaker
KR100841564B1 (en) * 2007-11-08 2008-06-26 에이치제이산전(주) Illuminator having circuit protection part
CN112134254A (en) * 2020-09-17 2020-12-25 许继电源有限公司 Hot-plug supporting open-circuit-proof sampling protection circuit and method and harmonic compensation device

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