KR20030040862A - Phase failure select method and open phase circuit breaker - Google Patents

Phase failure select method and open phase circuit breaker Download PDF

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KR20030040862A
KR20030040862A KR1020010071449A KR20010071449A KR20030040862A KR 20030040862 A KR20030040862 A KR 20030040862A KR 1020010071449 A KR1020010071449 A KR 1020010071449A KR 20010071449 A KR20010071449 A KR 20010071449A KR 20030040862 A KR20030040862 A KR 20030040862A
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phase
signal
imaging
power
phase power
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KR1020010071449A
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Korean (ko)
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KR100451250B1 (en
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김춘동
김무성
박창옥
김만호
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김춘동
김무성
박창옥
김만호
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/20—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits

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  • Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE: An open phase detecting method and an interception device is provided to prevent burning of a power equipment driven by a three-phase power by simultaneously intercepting three phases of a board or leakage breaker. CONSTITUTION: An open phase detecting method comprises decreasing a three-phase power(1), removing a noise of the decreased three-phase power(2), converting the noise-free three-phase power into a digital signal(3), removing an overlapping portion of the converted signal(4), judging whether or not of an open phase using a logic circuit(5), outputting an open phase signal when an open phase is caused(6), and operating a trip interception device in response to the open phase signal(7).

Description

결상 검출방법 및 차단장치{Phase failure select method and open phase circuit breaker}Phase failure select method and open phase circuit breaker

본 발명은 결상 검출방법 및 차단장치에 관한 것으로, 더욱 상세하게는 입력되는 삼상전원을 감압하고 포토커플러를 사용하여 잡음 등을 제거하여 디지털신호로 변환한 후, 비동기 미분회로를 이용하여 각 상의 중복부분을 제거하고 논리회로를 사용하여 결상여부를 확인하며, 일정시간동안 결상될 경우 트립차단장치를 작동하여 전원을 차단하도록 한 것이다.The present invention relates to a phase detection method and a blocking device, and more particularly, to reduce the input three-phase power supply, and to convert the digital signal by removing noise, etc. using a photocoupler, and then duplicate each phase using an asynchronous differential circuit. It removes the part and checks whether it is missing by using logic circuit. If it is lost for a certain time, it operates the tripping device to cut off the power.

일반적으로, 전기기계 장치를 사용하는 사용자가 한국전력으로부터 삼상전원으로 전기를 공급받을 경우, 전력설비인 변압기 1차 측의 각 상에 컷아웃스위치(COS : Cut-Out Switch) 및 변압기 2차 측에 캐치홀더(Catch Holder)를 설치하여 옥내설비의 과부하 또는 단락사고 발생 시, 전로를 자동적으로 차단시켜 전력설비와 옥내에 설치된 전기기계장치를 보호하고 있다.In general, when a user who uses an electromechanical device receives electricity from KEPCO to a three-phase power source, a cut-out switch (COS) and a transformer secondary side of each phase of the transformer primary side, which are power facilities, are used. A catch holder is installed in the system to protect the power equipment and the electrical machinery installed indoors by automatically shutting off the converter in the event of an overload or short circuit in the indoor equipment.

그러나, 상기 컷아웃스위치 또는 캐치홀더에 내장된 퓨즈(Fuse)가 외적요인에 의하여 끊어지게 되면, 입력전원은 결상상태가 된다.However, when the fuse built in the cutout switch or the catch holder is blown by external factors, the input power is in an open phase.

이때, 메인스위치 이후에 삼상전원으로 가동하는 삼상유도전동기 내부의 결상된 회로에서 전자유도에 의한 과전압이 유기되고, 상기 유기된 과전압에 의하여 절연내력이 파괴되어, 모든 삼상유도전동기에서 소손이 발생되기 때문에 사용자에게 막대한 피해를 주게 되는 문제점이 있다.At this time, the overvoltage due to electromagnetic induction is induced in the phased circuit inside the three-phase induction motor which operates as a three-phase power source after the main switch, and the insulation strength is destroyed by the induced overvoltage, causing burnout in all three-phase induction motors. Because of the enormous damage to the user there is a problem.

따라서, 본 발명의 목적은 상기한 문제점들을 해결하기 위한 것으로, 전원측으로부터 한 개의 상이 단전된 결상에 대해 배선용차단기 또는 누전차단기의 삼상을 동시에 차단할 수 있도록 함으로써, 삼상전원으로 가동하는 동력설비의 소손을 미연에 방지하여, 결상에 따른 사용자의 재산피해를 줄일 수 있는 결상 검출방법 및 차단장치를 제공함에 있다.Accordingly, an object of the present invention is to solve the above problems, by preventing the three-phase of the circuit breaker or earth leakage breaker at the same time for the phase disconnection of one phase from the power supply side, the damage of the power equipment operating with a three-phase power source The present invention provides an imaging detection method and a blocking device that can prevent damage in advance and reduce property damage of a user due to imaging.

도 1은 본 발명에 의한 결상 검출방법의 흐름도.1 is a flow chart of an image detection method according to the present invention.

도 2는 본 발명에 의한 결상 차단장치의 블록도.2 is a block diagram of an image forming blocking device according to the present invention.

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

10:전원입력부20:직류변환부10: power input unit 20: DC converter

30:결상감지센서부40:결상신호판정부30: imaging detection sensor unit 40: imaging signal judgment

50:결상신호확인부60:트립차단부50: imaging signal confirmation unit 60: trip blocking unit

상기 목적을 달성하기 위한 본 발명에 따른 결상 검출방법은, 입력되는 삼상전원을 감압하는 단계(스텝 1);와 포토커플러를 사용하여 잡음을 제거하는 단계(스텝 2);와 디지털 신호로 변환하는 단계(스텝 3);와 비동기 미분회로를 이용하여 각상의 중복부분을 제거하는 단계(스텝 4);와 논리회로를 사용하여 결상 여부를 판정하는 단계(스텝 5);와 결상 신호를 출력하는 단계(스텝 6); 및 트립차단장치를 작동하는 단계(스텝 7);로 이루어진 것을 특징으로 한다.The imaging detection method according to the present invention for achieving the above object comprises the steps of: reducing the input three-phase power supply (step 1); and removing the noise using a photocoupler (step 2); and converting into a digital signal Step (step 3); and removing redundant portions of each phase using an asynchronous differential circuit (step 4); and determining whether or not an image is lost using a logic circuit (step 5); and outputting an imaging signal. (Step 6); And operating the trip blocking device (step 7).

또한, 상기 목적을 달성하기 위한 본 발명에 따른 결상 차단장치는 삼상전원을 입력받는 전원입력부(10)와, 상기 삼상전원을 직류로 변환하는 직류변환부(20)와, 상기 삼상전원을 감압하여 디지털신호로 변환하는 결상감지센서부(30)와, 상기 변환된 디지털신호를 이용하여 결상여부를 판정한 후, 결상이 발생하면 결상신호를 출력하는 결상신호판정부(40)와, 상기 결상신호의 입력이 일정시간동안 계속될 경우에 차단신호를 출력하는 결상신호확인부(50) 및 상기 차단신호를 입력받을 경우, 상기 직류변환부에서 변환된 직류전원의 입력을 차단하는 트립차단부(60)로 구성된 것을 특징으로 한다.In addition, the imaging blocking device according to the present invention for achieving the above object is a power input unit 10 for receiving a three-phase power source, a DC converter 20 for converting the three-phase power source into a direct current, and decompressing the three-phase power source An imaging detection sensor unit 30 for converting into a digital signal, an imaging signal determination unit 40 for outputting an imaging signal when an imaging occurs after determining whether an imaging is performed using the converted digital signal, and the imaging signal When the input of the continuous continues for a predetermined time, the phase disconnection signal checking unit 50 for outputting a cutoff signal and the tripping block 60 for blocking the input of the DC power converted by the DC converter when receiving the cutoff signal It is characterized by consisting of).

이하에서 상기한 본 발명의 바람직한 실시 예를 첨부된 도면을 참고하여 상세히 설명하도록 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 의한 결상 검출방법의 흐름도로서, 삼상의 입력전원이 공급되면 저항분압방식으로 감압을 한 후(스텝 1), 포토커플러를 이용하여 노이즈 등을 제거한다(스텝 2).Fig. 1 is a flowchart of the phase detection method according to the present invention. When the three-phase input power is supplied, the pressure is reduced by the resistance voltage dividing method (step 1), and then noise and the like are removed using a photocoupler (step 2).

여기서, 상기 포토커플러(photocoupler)는 빛을 이용하기 때문에 잡음에 강하고, 시스템을 구성하는 장치간의 전류를 절연할 수 있으며, 각 장치마다 접지(接地)가 가능하고, 장치간의 결합용량이 작기 때문에 출력 쪽의 신호가 입력 쪽으로 되돌아가는 일이 없는 등의 장점이 있기 때문에, 전기회로와 단말기 등을 포토커플러를 매개해서 결합하면, 전원전압의 차이나 기계부에서 발생하는 잡음에 신경을 쓸 필요가 없어 회로설계가 쉬워지기 때문에, 사용범위가 넓은 소자이다.Since the photocoupler is light, the photocoupler is resistant to noise and can insulate the current between devices constituting the system, and the ground is possible for each device, and the output capacity is small because the coupling capacity between devices is small. Because there is an advantage that the signal of the side does not return to the input side, it is not necessary to pay attention to the difference in power voltage or the noise generated by the mechanical part when combining the electric circuit and the terminal through the photocoupler. Since the design becomes easy, the device has a wide range of use.

상기, 포토커플러에 의하여 노이즈 등이 제거된 신호는 낫게이트(NOT gate)를 거쳐서 안정적인 디지털신호로 변환된다(스텝 3).The signal from which noise is removed by the photocoupler is converted into a stable digital signal through a NOT gate (step 3).

이때, 삼상전원의 각 상의 위상차이가 120°이기 때문에 중복되는 부분이 발생되며, 비동기 미분회로를 이용하여 상기 중복된 부분을 제거한다(스텝 4).At this time, since the phase difference of each phase of the three-phase power supply is 120 °, overlapping portions are generated, and the overlapping portions are removed using an asynchronous differential circuit (step 4).

여기서, 상기 비동기 미분회로(asynchronous differential circuit)는 입력신호가 원하는 시간의 범위를 벗어나는 경우에, 원하는 시간동안만 출력신호를 발생하는 회로이다.Here, the asynchronous differential circuit is a circuit that generates an output signal only for a desired time when the input signal is out of a desired time range.

상기, 비동기 미분회로에서 출력된 신호를 논리회로의 입력신호로 한 후, 상기 논리회로의 출력신호에 의하여 결상을 판정하고(스텝 5), 상기 결상의 판정에 따라 결상신호를 출력하며(스텝 6), 상기 결상신호가 일정 시간 동안 계속적으로 발생될 경우, 입력전원을 차단하기 위한 트립차단장치가 작동된다.(스텝 7).After setting the signal output from the asynchronous differential circuit as the input signal of the logic circuit, the imaging is determined by the output signal of the logic circuit (step 5), and the imaging signal is output in accordance with the determination of the imaging (step 6). If the imaging signal is continuously generated for a predetermined time, the trip blocking device for shutting off the input power is activated (step 7).

도 2는 본 발명에 의한 결상 차단장치의 블록도로서, 삼상 380V의 전원이 전원입력부(10)로 입력되면, 전원입력부(10)는 입력된 전원을 직류변환부(20)와 결상감지센서부(30)로 공급한다.FIG. 2 is a block diagram of the phase cut-off device according to the present invention. When power of three-phase 380V is input to the power input unit 10, the power input unit 10 converts the input power into a DC converter 20 and an image detection sensor unit. Supply to (30).

상기 직류변환부(20)는 입력된 삼상전원을 삼상전파정류회로를 이용하여 직류전원으로 변환하며, 변환된 삼상전파정류전원은 저항분압방식을 이용하여 일정한 전압으로 감압하여 내부회로(도시하지 않음)로 공급한다.The DC converter 20 converts the input three-phase power into a DC power by using a three-phase full-wave rectifier circuit, and the converted three-phase full-wave rectified power is decompressed to a constant voltage using a resistance voltage dividing method to prevent internal circuitry (not shown). ).

또한, 상기 결상감지센서부(30)는 입력된 삼상전원을 저항분압방식을 이용하여 일정한 전압으로 감압한 후에 포토커플러로 입력된다.In addition, the phase detection sensor unit 30 is input to the photocoupler after reducing the input three-phase power to a constant voltage using a resistance voltage divider method.

상기 포토커플러로 입력된 전원은 펄스신호로 변환되어 출력되며, 상기 출력된 펄스신호는 낫게이트를 거쳐 안정된 디지털신호로 변환된다.The power input to the photocoupler is converted into a pulse signal and outputted, and the output pulse signal is converted into a stable digital signal through a nat gate.

여기서, 삼상전원은 120°의 위상차이를 보이는 전원이므로, 상기 공급되는 디지털신호, 즉 펄스파형도 120°의 위상차이를 보이게 되며, 이로 인하여 각 상들이 중복되게 된다.Here, since the three-phase power source is a phase difference of 120 °, the supplied digital signal, that is, the pulse waveform also shows a phase difference of 120 °, and thus the respective phases overlap.

상기 펄스파형이 결상신호판정부(40)로 입력되면, 결상신호판정부(40) 내부의 비동기 미분회로에 의하여 중복부분이 제거되며, 상기 비동기 미분회로의 출력신호는 논리회로를 거쳐 삼상전원의 결상여부를 확인하고, 결상 발생시에 결상신호를 출력하게된다.When the pulse waveform is input to the imaging signal determination unit 40, the redundant portion is removed by the asynchronous differential circuit inside the imaging signal determination unit 40, and the output signal of the asynchronous differential circuit passes through the logic circuit to the three-phase power source. Checks for missing phase and outputs missing phase signal.

여기서, 상기 논리회로는 논리곱(AND), 논리합(OR) 또는 부정(NOT) 게이트(GATE) 등을 이용하여 원하는 결과를 얻어내기 위한 것으로, 당업자간에 다양한 논리회로를 구성하는 것이 가능함은 물론이다.Here, the logic circuit is for obtaining a desired result by using AND, OR, NOT gate, etc., and various logic circuits can be constructed by those skilled in the art. .

그리고, 상기 결상신호가 발생되는 원인으로는 결상의 발생 이외에도 전원측으로부터 삼상이 동시에 정전되거나 차단기 자체동작에 의한 접촉점 시간차에 의하여 미세한 결상신호를 발생시킬 수 있다.As the cause of the imaging signal, in addition to the occurrence of the imaging, fine imaging signals may be generated by three-phase power failure at the same time from the power supply side or contact point time difference caused by the circuit breaker itself.

이러한 신호는 내부회로의 잦은 온오프(on-off) 동작을 유발시키게 되며, 그것으로 인한 기기의 수명단축을 초래하게 되므로, 상기 결상신호를 결상신호확인부(50)로 입력하여 일정시간동안 결상신호가 입력될 경우에만 차단신호를 출력하게 된다.Such a signal causes frequent on-off operation of the internal circuit, which causes shortening of the life of the device. Therefore, the imaging signal is input to the imaging signal confirming unit 50 for imaging for a predetermined time. The cutoff signal is output only when a signal is input.

상기 직류변환부(20)에서 변환된 삼상전파정류전원을 내부회로에 전달하는 트립차단부(60)로 상기 차단신호가 입력되면, 트립차단부(60)는 삼상전파정류전원의 입력을 중단하게 된다.When the blocking signal is inputted to the trip blocking unit 60 which transfers the three-phase full-wave rectified power converted by the DC converter 20 to an internal circuit, the trip blocking unit 60 stops input of the three-phase full-wave rectified power. do.

이때, 트립차단부(60)의 온오프 동작은 비제이티(BJT : Bipolar Junction Transistor) 또는 에프이티(FET : Field Effect Transistor ) 등을 사용할 수 있다.In this case, the on-off operation of the trip blocking unit 60 may use a Bipolar Junction Transistor (BJT) or a Field Effect Transistor (FET).

상기 본 발명은 당업자의 요구에 따라 기본 개념을 벗어나지 않는 범위 내에서 다양한 변형이 가능하다.The present invention may be modified in various ways without departing from the basic concept according to the needs of those skilled in the art.

상술한 바와 같이 본 발명에 따르면, 기존에 사용하던 배선용차단기 또는 누전차단기를 결상차단기로 변경할 경우, 기존의 배선용차단기 또는 누전차단기에 결상차단장치를 추가로 설치할 수 있어, 회로구성에 따른 별도의 배선작업이 필요하지 않기 때문에 사용자의 편의를 도모할 수 있으며, 삼상전원중 한 개의 상이 단전되었을 경우, 배선용차단기 또는 누전차단기가 자동적으로 삼상을 동시에 차단함으로써, 삼상전원으로 가동하는 동력 설비의 소손을 미연에 방지하여, 결상에 따른 사용자의 재산피해를 줄일 수 있는 효과가 있다.As described above, according to the present invention, when the existing circuit breaker or the ground fault breaker is changed to the phase breaker, the phase breaker may be additionally installed in the existing circuit breaker or the ground fault breaker, so that separate wiring according to the circuit configuration Since no work is required, the user's convenience can be achieved. If one of the three-phase power supply is disconnected, the circuit breaker or the ground-breaker automatically shuts down the three phases simultaneously, thus preventing damage to the power equipment operating with the three-phase power supply. By preventing the damage to the property of the user due to the imaging is effective.

Claims (2)

삼상전원의 결상 여부를 확인하는 결상 검출방법에 있어서,In the phase detection method for checking whether or not the phase of the three-phase power supply, 입력되는 삼상전원을 감압하는 단계(스텝 1);와Depressurizing the input three-phase power supply (step 1); and 상기 감압된 삼상전원의 잡음을 제거하는 단계(스텝 2);와Removing the noise of the reduced three-phase power supply (step 2); and 상기 잡음을 제거한 삼상전원을 디지털 신호로 변환하는 단계(스텝 3);와Converting the three-phase power source from which the noise is removed to a digital signal (step 3); and 상기 변환된 신호의 중복부분을 제거하는 단계(스텝 4);와Removing overlapping portions of the converted signal (step 4); and 논리회로를 사용하여 결상 여부를 판정하는 단계(스텝 5);와Determining whether an image is lost using a logic circuit (step 5); and 결상이 발생할 경우에 결상 신호를 출력하는 단계(스텝 6); 및Outputting an imaging signal when an imaging occurs (step 6); And 상기 결상 신호를 입력받아 트립차단장치를 작동하는 단계(스텝 7);로 이루어진 것을 특징으로 결상 검출방법.And a step (step 7) of operating the trip blocking device by receiving the imaging signal. 삼상전원의 결상 여부를 확인하여 전원을 차단하는 차단장치에 있어서,In the cut-off device to cut off the power by checking the phase of three-phase power, 삼상전원을 입력받는 전원입력부(10)와,A power input unit 10 for receiving three-phase power; 상기 삼상전원을 직류로 변환하는 직류변환부(20)와,DC conversion unit 20 for converting the three-phase power to direct current, 상기 삼상전원을 감압하여 디지털신호로 변환하는 결상감지센서부(30)와,An image detection sensor unit 30 for converting the three-phase power into a digital signal by reducing the pressure; 상기 변환된 디지털신호를 이용하여 결상을 판정한 후에 결상신호를 출력하는 결상신호판정부(40)와,An imaging signal determination unit 40 for outputting an imaging signal after determining the imaging using the converted digital signal; 상기 결상신호의 입력이 일정시간동안 계속될 경우에 차단신호를 출력하는 결상신호확인부(50) 및An imaging signal checking unit 50 for outputting a blocking signal when the input of the imaging signal continues for a predetermined time; 상기 차단신호를 입력받아 상기 직류변환부에서 변환된 직류전원의 입력을 차단하는 트립차단부(60)로 구성된 것을 특징으로 하는 결상 차단장치.An imaging block device comprising a trip blocking unit (60) for receiving the blocking signal and blocking the input of the DC power converted by the DC converter.
KR10-2001-0071449A 2001-11-16 2001-11-16 Phase failure select method and open phase circuit breaker KR100451250B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140009747A (en) * 2012-07-13 2014-01-23 한국전력공사 Apparatus and method for controlling fault monitoring and fault prevention of power supply system
KR20160124111A (en) * 2014-02-21 2016-10-26 더 유에이비 리서치 파운데이션 Method for detecting an open-phase condition of a transformer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920005228Y1 (en) * 1988-06-15 1992-07-30 사토 히로시 Ptc device
JP3350456B2 (en) * 1991-10-29 2002-11-25 大阪瓦斯株式会社 Detector for ultra-current-limited power fuse
KR0161835B1 (en) * 1995-11-13 1998-12-15 이종수 Overcurrent relay for open phase protection
KR200241287Y1 (en) * 2000-11-28 2001-09-26 주식회사 화인엘컴스 Wiring breakers with built-in phase protection circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140009747A (en) * 2012-07-13 2014-01-23 한국전력공사 Apparatus and method for controlling fault monitoring and fault prevention of power supply system
KR20160124111A (en) * 2014-02-21 2016-10-26 더 유에이비 리서치 파운데이션 Method for detecting an open-phase condition of a transformer
US10522998B2 (en) 2014-02-21 2019-12-31 The Uab Research Foundation Method for detecting an open-phase condition of a transformer
US10931094B2 (en) 2014-02-21 2021-02-23 The Uab Research Foundation Method for detecting an open-phase condition of a transformer

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