KR0121268Y1 - Circuit breaker - Google Patents

Circuit breaker

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Publication number
KR0121268Y1
KR0121268Y1 KR92016191U KR920016191U KR0121268Y1 KR 0121268 Y1 KR0121268 Y1 KR 0121268Y1 KR 92016191 U KR92016191 U KR 92016191U KR 920016191 U KR920016191 U KR 920016191U KR 0121268 Y1 KR0121268 Y1 KR 0121268Y1
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KR
South Korea
Prior art keywords
current
circuit
unit
phase
value
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Application number
KR92016191U
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Korean (ko)
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KR940006537U (en
Inventor
황인삼
Original Assignee
김회수
엘지산전주식회사
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Priority to KR92016191U priority Critical patent/KR0121268Y1/en
Publication of KR940006537U publication Critical patent/KR940006537U/en
Application granted granted Critical
Publication of KR0121268Y1 publication Critical patent/KR0121268Y1/en

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Classifications

    • 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
    • H02H3/08—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 excess current
    • H02H3/083—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 excess current for three-phase systems
    • 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
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means

Abstract

본고안은 회로 차단기에 관한 것으로 선로의 이상 상태를 검출하여 선로를 차단하는 회로 차단기이다. 종래에는 각상의 전류값을 구해 논리합회로에 의해 최대값을 검출함으로써 3상, 단상에 따라 위상차때문에 실효치, 평균치의 연산에 오차가 발생하였다.The present invention relates to a circuit breaker and is a circuit breaker that detects an abnormal state of a line and breaks the line. Conventionally, by calculating the current value of each phase and detecting the maximum value by a logic sum circuit, an error occurs in the calculation of the effective value and the average value due to the phase difference between the three phases and the single phase.

반변 본고안은 각상의 전류갑을 각각 검출하여 정격전류 설정 및 순시 설정값과 비교 연산하여 이상유무를 판단하여 선로를 차단하였다.In this paper, the current detection of each phase is detected and compared with the rated current setting and instantaneous setting value.

Description

회로 차단기Circuit breaker

제1도는 종래의 회로 차단기의 회로도.1 is a circuit diagram of a conventional circuit breaker.

제2도는 본고안의 회로 차단기의 회로도.2 is a circuit diagram of a circuit breaker in this article.

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

CT1~CT3: 변류기 1~3 : 정류부CT 1 to CT 3 : Current transformers 1 to 3: Rectifier

4~6 : 부담회로부 7~9 : 파형 변환부4 to 6: Burden circuit part 7 to 9: Waveform conversion part

10 : A/D변환기 11 : 마이콤10: A / D Converter 11: Micom

13 : 전원부 14 : 트립부13 power supply part 14 trip part

16 : 멀티플렉서 17 : 순시설정 회로부16: multiplexer 17: instantaneous setting circuit

18 : 디지탈 회로 및 제어부 19 : 정격전류 설정부18: digital circuit and control unit 19: rated current setting unit

20 : 트립장치 안정부 21 : 포토 커플러20: trip device stabilizer 21: photo coupler

본고안은 회로 차단기에 관한 것으로 특히 저압 선로의 과부하 상태를 검출하여 선로를 차단시키는 회로 차단기에 관한 것이다.The present invention relates to a circuit breaker, and more particularly, to a circuit breaker that detects an overload condition of a low voltage line and cuts the line.

선로에 연결한 부하가 이상상태에 의해 과부하가 발생하면 과전류가 흐른다. 이 과전류에 의해 부하는 치명적으로 손상을 받을수 있는데 이러한 이상 상태를 검출하여 선로를 차단 시키는 개폐장치가 필요한데 그중 하나가 저압회로 차단기로써 구현 방법에 따라 여러 가지 형태의 차단기가 있다.If the load connected to the line is overloaded by abnormal condition, overcurrent flows. The load can be fatally damaged by the overcurrent, and it needs a switchgear to detect such an abnormal state and cut off the line. One of them is a low voltage circuit breaker, and there are various types of breakers depending on the implementation method.

이와같은 종래의 회로 차단기를 첨부된 도면은 참조하여 설명하면 다음과 같다.Such a conventional circuit breaker is described with reference to the accompanying drawings as follows.

제1도는 종래의 회로 차단기 회로도를 나타낸 것으로써, 각상(R.S.T)의 선로에서 각각 전류의 크기를 검출하는 복수개의 변류기(CT1~CT3)와, 변류기(CT1~CT3)에서 검출된 교류전류를 전파정류시키는 복수개의 전파정류부(1~3)와 전파 정류부(1~3)에서 직류로 변환된 전류를 직류 전압으로 변환하는 복수개의 부담회로부(4~6)와, 부담회로부(4~6)에서 변환된 전압을 실효치 또는 평균치로 변환시키는 복수개의 파형 변환부(7~9)와, 다이오드(D4~D6)로 이루어져 복수개의 파형 변환부(7~9)의 출력중 최대값을 선택하는 논리합 회로부(15)와 논리합회로부(15)의 출력신호를 디지털 신호로 변환하는 A/D변환부(10)와, 다지탈 신호로 변환된 데이터를 연산하고 고장상태를 판별하는 마이콤(11)과, 과도한 전류가 흐르는 것을 검출하는 시한발생회로부(12)와, 과부하시 선로를 차단시킬수 있도록한 트립부(14)와, 각 전파정류부(1~3)직류단의 +측으로 출력되는 직류 전류를 합하여 전원을 만드는 전원부(13)로 구성된다.The first turn is detected from a plurality of current transformers (CT 1 ~ CT 3) for detecting the size of the respective currents in the line of writing illustrates a prior art circuit breaker circuit, each phase (RST), a current transformer (CT 1 ~ CT 3) A plurality of full-wave rectifiers 1 to 3 for full-wave rectifying an AC current, a plurality of charge circuits 4 to 6 for converting a current converted into direct current from the full-wave rectifiers 1 to 3, and a charge circuit unit 4 And a plurality of waveform converters 7 to 9 for converting the voltage converted in ˜6) to an effective value or an average value, and diodes D 4 to D 6 to maximize the output of the waveform converters 7 to 9. A / D converter 10 for converting the output signal of the logic sum circuit 15 and the logic sum circuit 15 to select a value into a digital signal, and a microcomputer that calculates data converted into digital signals and determines a fault condition. (11), the time generation circuit portion 12 for detecting that excessive current flows, and the line at the time of overload The trip part 14 which can be interrupted | blocked, and the power supply part 13 which generate | occur | produces a power supply by combining the DC current output to the + side of each full wave rectifying part 1-3 are made.

이설명부호는 다이오드(D1~D3)이고, 다이리스터(SCR)이다.This description symbol is a diode (D 1 ~ D 3 ), and is a thyristor (SCR).

이와같이 구성된 종래의 회로 차단기는 다음과 같이 동작한다.The conventional circuit breaker configured as described above operates as follows.

즉, 각상(R.S.T)의 배선 선로에 흐르는 전류의 크기를 변류기(CT1~CT3)를 통해 검출하고 검출된 전류는 각각 전파 정류부(1~3)에 의해 직류 전류로 된다.That is, the magnitude of the current flowing in the wiring line of each phase RST is detected through the current transformers CT 1 to CT 3 , and the detected currents are respectively converted into direct current by the full-wave rectifiers 1 to 3.

직류 전류는 각각 부담 회로부(4~6)에 의해 직류 전압으로 변환된다.DC current is converted into DC voltage by the burden circuit parts 4-6, respectively.

변환된 직류 전압은 각각 파형 변환부(7~9)에 의해 실효치 또는 평균치로 변환되고 실효치 또는 평균치로 변환되어 각 파형변환부(7~9)에서 출력되는 산호중 최대값이 논리합 회로부(15)에 의해 선택됨으로 각상(R.S.T)에 흐르는 전류값중 가장 큰상의 전류값을 취할수 있다.The converted DC voltage is converted into an effective value or an average value by the waveform converters 7 to 9, respectively, and is converted into an effective value or an average value so that the maximum value of corals outputted from each waveform conversion unit 7 to 9 is the logical sum circuit part 15. By selecting by, it is possible to take the current value of the largest phase among the current values flowing in each phase RST.

가장큰 상의 전류값은A/D 변환부(10) 및 마이콤(11)에 입력되어 정격이상의 과부하 상태가 판별 검사되어 소정의 열특성에 따라 트립부(14)에 의해 차단기의 주접접을 차단시켜 선로를 개리시킨다.The current value of the largest phase is input to the A / D converter 10 and the microcomputer 11 to discriminate and check the overload condition of the rating or higher, and the main contact of the circuit breaker is cut off by the trip unit 14 according to a predetermined thermal characteristic. Gary.

또한 순간적인 과도한 상태(단락)를 시한 발생회로부(12)가 검출하여 다이리스터(SCR)를 동작시켜 선로를 개리시킨다.In addition, the instantaneous excessive state (short circuit) detects the time-generated circuit part 12 and operates the thyristor SCR to open the line.

그러나 이와같은 종래의 회로차단기에 있어서는 각상의 전류를 실효치 또는 평균치 전압으로 변환하여 각상중 논리합 회로부(15)에 의해 최대치를 검출하여 과부하를 판단하는데 3상에서는 120°의 위상차가 있기 때문에 3상, 단상에 따라서 논리합회로부(15)의 연산에 오차가 발생하는 문제점이 있다.However, in such a conventional circuit breaker, the current of each phase is converted into an effective value or an average voltage, and the maximum value is determined by the logic sum circuit section 15 of each phase to determine the overload. Accordingly, there is a problem that an error occurs in the calculation of the logic sum circuit unit 15.

본고안은 상기와 같은 문제점을 해결하기 위해 안출한 것으로, 각상의 전류값을 각각 검출하고 실효치 및 평균치를 구하여 각각을 연산하여 오차를 줄여 신뢰성을 향상시키는데 그목적이 있다.The purpose of the present invention is to solve the above problems, and the purpose of the present invention is to detect the current value of each phase, obtain an effective value and an average value, calculate each value, and reduce errors to improve reliability.

이와같은 목적을 달성하기 위한 본고안은 첨부된 도면을 참조하여 설명하면 다음과 같다.The present invention for achieving the above object will be described with reference to the accompanying drawings.

제2도는 본고안의 회로차단기의 화로도로써, 각상(R.S.T)의 선로에서 각각의 전류크기를 검출하는 복수개의 변류기(CT1~CT3)와, 각 전류기(CT1~CT3)에서 검출된 전류를 직류로 변환하는 복수개의 전파정류부(1~3)와, 각 전파정류부(1~3)에서 변환된 직류전류를 직류 전압으로 변환시키는 복수개의 부담회로부(4~6)와, 각 부담회로부(4~6)에서 변환된 직류전압을 정전압으로 변환시켜 실효치를 검출하는 복수개의 파형 변환부(7~9)와, 상기 각 전파정류부(1~3)의 직류단+측 출력 전류를 합하여 전원을 생성하는 전원부(13)와, 멀티플렉서(16),A/D변환기(10), 마이콤(11)등으로 이루어져 각 파형 변환부(7~9)를 통해 각상의 전압크기를 읽고 디지털화하여 이상유무를 판단하는 디지털회로 및 제어부(18)와, 스위치(Sw1~Sw3), 다이오드(D4~D6), 저항(R1~R9), 비교기(op1~op2)등으로 이루어져 정격전류의 가조정에 따른 손시 전류크기를 정격 전류에 따랄 일정하게하는 순시설정회로부(17)와, 저항(R12~R15), 스위치(Sw4~Sw6)등으로 이루어져 정격 전류를 조정할수 있도록한 정격 전류설정부(19)와, 이상 발생시 선로를 차단하는 트립부(14)와, 저항(R10~R11), 커패시터(C1), 등으로 이루어져 디지털회로 및 제어부(18)의 불안정한 상태에서 트립부(14)가 동작하지 않도록하는 트립장치 안정부(20)로 구성된다.Second turn as even furnace of in circuit breakers paper, and a plurality of current transformers (CT 1 ~ CT 3) for detecting each of the current magnitude in the line of each phase (RST), detected in each of the current group (CT 1 ~ CT 3) A plurality of full-wave rectifiers 1 to 3 for converting the current into direct current, a plurality of burden circuit sections 4 to 6 for converting the direct-current current converted in each of the full-wave rectifiers 1 to 3 into direct voltage, and each burden A plurality of waveform converters 7 to 9 for converting the DC voltage converted by the circuits 4 to 6 into a constant voltage to detect an effective value, and the DC terminal + side output currents of the full-wave rectifiers 1 to 3 are added together. It consists of a power supply unit 13 for generating a power supply, a multiplexer 16, an A / D converter 10, a microcomputer 11, and the like, and reads and digitizes the voltage magnitude of each phase through each waveform converter 7-9. and a digital circuit and a control unit 18 for judging whether or not, the switch (Sw Sw 1 ~ 3), the diode (D 4 ~ 6 D), resistance (R 1 ~ R 9), a comparator (op 1 ~ op 2) As consisting of the instantaneous setting circuit section 17 that ttaral constant sonsi amount of current according to a rated current is adjusted to the rated current, a resistor (R 12 ~ R 15), the switch (Sw 4 ~ Sw 6) to consist of the rated current, The rated current setting unit 19 to adjust the voltage, the trip unit 14 to cut off the line in the event of an abnormality, the resistor (R 10 ~ R 11 ), the capacitor (C 1 ), etc. 18 is configured as a trip device stabilizer 20 for preventing the trip unit 14 from operating in an unstable state.

여기서, 디지털회로 및 제어부(18)와 트립장치 안정부(20)사이에는 포토커플로(21)가 설치되고 트립장치 안정부(20)는 다이리스터(SCR)를 통해 트립부(14)를 제어한다.Here, a photo coupler 21 is installed between the digital circuit and the control unit 18 and the trip device stabilizer 20, and the trip device stabilizer 20 controls the trip unit 14 through the thyristor SCR. do.

이와같이 구성된 본고안의 회로 차단기는 다음과같이 동작한다.The circuit breaker in this configuration thus constructed operates as follows.

각 배선 선로의 전류 검출용 변류부(CT1~CT3)은 부하에 따라 각각 다른 크기의 전류값을 각각 검출하고, 검출된 전류는 전파정류부(1~3)에 의해 직류전류로 각각 변환된다. 변환된 직류전류는 각 부담회로부(4~6)에서 직류전압으로 변환된다. 그리고 변환된 직류전압을 각 파형 변환부(7~9)가 입력하여 실효치를 검출하고 이 값은 디지털 회로 및 제어부(18)에 의해 각상(R.S.T)의 전류값을 연산하여 최대상의 전류값을 검사하고 정격 전류설정부(19) 및 순시 설정부 회로부(17)의 값과 비교하여 과부하이면 트립부(14)를 통해 선로를 차단한다.Current detecting current transformers CT 1 to CT 3 of each wiring line detect current values having different magnitudes according to loads, and the detected currents are converted into direct current by the full-wave rectifying units 1 to 3, respectively. . The converted DC current is converted into DC voltage in each burden circuit unit 4 to 6. The waveform converters 7 to 9 input the converted DC voltages to detect an effective value, and the digital circuit and the controller 18 calculate the current value of each phase RST by checking the current value of the maximum phase. When the overload is compared with the values of the rated current setting unit 19 and the instantaneous setting unit circuit unit 17, the line is blocked through the trip unit 14.

이때 정격 전류설정부(19)의 스위치(Sw4~Sw6)와 순시설정회로부(17)의 스위치(Sw1~Sw3)은 연동되며 디지털 회고 및 제어부(18)가 불안정하면 트립장치 안정부(20)에 의해 트립부(14)가 동작하지 않는다.At this time, the switches Sw 4 to Sw 6 of the rated current setting unit 19 and the switches Sw 1 to Sw 3 of the instantaneous setting circuit unit 17 are interlocked. The trip part 14 does not operate by the 20.

이상에서 설명한 바와같이 본고안의 회로 차단기에 있어서는 각상의 전류값을 연산하는데 오차가 발생하지 않아 이상상태(과부하 및 순시)를 정확하게 검출할수 있고 오동작을 방지할수 있는 효과가 있다.As described above, in this circuit breaker, no error occurs in calculating the current value of each phase, so that an abnormal state (overload and instantaneous state) can be accurately detected and the malfunction can be prevented.

Claims (2)

각상의 선로에서 전류 크기를 각각 검출하는 복수개의 변류부(CT1~CT3)와, 각 변류부(CT1~CT4)에서 검출된 전류를 직류 전류로 변환하는 복수개의 정류부(1~3)와, 각 정류부(1~3)의 직류단 일측에서 출력되는 직류전류를 직류 전압으로 변환하는 복수개의 부담회로부(4~6)와, 각 부담회로부(4~6)의 직류전압에서 실효치를 검출하는 파형 변화부(7~9)와, 상기 각 정류부(1~3)의 다른 직류단에서 출력되는 직류전원을 합하여 전원을 공급하는 전원부(13)와, 정격 전류를 가조종할수 있는 정격전류 설정부(19)와, 정격전류의 가조정에 따른 순시전류 크기를 정격 전류에 따라 일정하게 하는 순시 설정회로부(17)와, 상기 각 파형 변환부(7~9)를 통해 각상의 전압을 읽고, 각상의 전류값을 연산하여 최대상의 전류값을 검사하고 정격전류와 비교하여 이상유무를 판단하는 디지털회로 및 제어부(18)와, 디지털회로 및 제어부(18)가 불안정시에는 트립장치가 동작하지 않도록하는 트립장치 안정부(20)와,이상상태(과부하)시 선로를 차단하는 트립부(14)를 포함하여 구성됨을 특징으로 하는 회로차단기.A plurality of current transformers CT 1 to CT 3 for detecting current magnitudes in each phase line, and a plurality of rectifiers 1 to 3 for converting the current detected by each current transformer CT 1 to CT 4 into direct current. ), A plurality of burden circuit sections 4-6 for converting the DC current output from one side of the DC terminal of each rectifying section 1 to a DC voltage, and an effective value at the DC voltage of each burden circuit section 4-6. A power supply unit 13 for supplying power by combining the waveform change parts 7 to 9 to be detected, the DC power output from the other DC terminals of the rectifiers 1 to 3, and a rated current capable of controlling the rated current; The voltage of each phase is read through the setting unit 19, the instantaneous setting circuit unit 17 which makes the magnitude of the instantaneous current according to the provisional adjustment of the rated current constant according to the rated current, and each of the waveform converting units 7-9. , Calculate current value of each phase and check current value of maximum phase and compare with rated current The digital circuit and the control unit 18, the trip unit stabilizer 20 to prevent the trip device from operating when the digital circuit and the control unit 18 are unstable, and the trip unit 14 to block the line in the event of an abnormal condition (overload). Circuit breaker, characterized in that configured to include. 제1항에 있어서 디지털회로 및 제어부(18)는 각 파형 변환부(7~9)의 출력신호를 각 채널이 입력하여 선택신호에 의해 일신호를 출력하는 멀티플렉서(16)와, 멀티플렉서(16)의 출력신호를 디지털신호로 변환하는A/D 변환기(10)와, 디지털 신호를 입력하여 전류값을 연산하고 이상유무를 판단하는 마이콤(11)으로 구성됨을 특징으로 하는 회로차단기.The digital circuit and the control unit 18 are a multiplexer 16 and a multiplexer 16 for inputting an output signal of each waveform converting unit 7 to 9 to output one signal by a selection signal. A / D converter (10) for converting the output signal of the digital signal, and a circuit breaker, characterized in that the input to the digital signal to calculate the current value and determine whether there is an abnormality (11).
KR92016191U 1992-08-27 1992-08-27 Circuit breaker KR0121268Y1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100524114B1 (en) * 2003-05-17 2005-10-26 (주)제일피앤피 distributing board
KR102066713B1 (en) * 2019-09-03 2020-01-15 김성웅 Arc detection device for each eletric line

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100386815B1 (en) * 2001-06-26 2003-06-09 휴먼엘텍 주식회사 Overload circuit interrupter in capable of electrical tripping and circuit breaker with that
KR102646024B1 (en) 2022-10-18 2024-03-12 하이드로텍(주) Pilot check valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100524114B1 (en) * 2003-05-17 2005-10-26 (주)제일피앤피 distributing board
KR102066713B1 (en) * 2019-09-03 2020-01-15 김성웅 Arc detection device for each eletric line

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