KR950023982A - Abnormal current detector - Google Patents

Abnormal current detector Download PDF

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Publication number
KR950023982A
KR950023982A KR1019940001038A KR19940001038A KR950023982A KR 950023982 A KR950023982 A KR 950023982A KR 1019940001038 A KR1019940001038 A KR 1019940001038A KR 19940001038 A KR19940001038 A KR 19940001038A KR 950023982 A KR950023982 A KR 950023982A
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KR
South Korea
Prior art keywords
chip microprocessor
current
detection device
backup ram
value
Prior art date
Application number
KR1019940001038A
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Korean (ko)
Inventor
조형기
Original Assignee
조형기
삼흥중전기기공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 조형기, 삼흥중전기기공업 주식회사 filed Critical 조형기
Priority to KR1019940001038A priority Critical patent/KR950023982A/en
Publication of KR950023982A publication Critical patent/KR950023982A/en

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Abstract

본 발명은 이색전류 검출장치에 관한 것으로, 배전선로상에 장착된 변류기(CT : Current Transformer)등에 의해 전류값을 아날로그 신호로 검출하고 정류 및 전치증폭한 후 아날로그/디지탈 변환기를 경유하여 단일칩 마이크로 프로세서에 입력되도록 하여 사용자가 설정 입력한 기준값과 절대값으로 비교하도록 하고, 그 비교값이 일정레벨 이하이면 임의로 정한 시간마다 전류값을 백업램에 저장하면서 일정레벨 이상이면 빠른 샘플링 속도로 전류값을 백업램에 저장하도록 함으로써 모뎀을 통한 직렬통신이나 램드라이버를 통한 병렬통신의 방법으로 퍼스널 컴퓨터에서 데이타를 분석할 수 있도록 한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dichroic current detection device, which detects a current value as an analog signal by a current transformer (CT) mounted on a distribution line, rectifies and preamplifies the signal, and then converts the signal into a single-chip microcomputer through an analog / digital converter. If the comparison value is below a certain level, the current value is stored in the backup RAM at a predetermined time when the comparison value is below a certain level. By storing the data in a backup RAM, data can be analyzed in a personal computer by serial communication through a modem or parallel communication through a ram driver.

Description

이상전류 검출장치Abnormal current detector

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 전체적인 구성을 나타낸 블럭도.1 is a block diagram showing the overall configuration of the present invention.

제2도는 본 발명의 램드라이버의 구성을 나타낸 상세 블럭도.2 is a detailed block diagram showing the configuration of the ram driver of the present invention.

제3도의 (가) 내지 (하)는 본 발명의 LCD의 표시상태를 나타낸 개략도.3A to 3B are schematic diagrams showing a display state of the LCD of the present invention.

제4도는 본 발명의 동작과정을 나타낸 플로우챠트.4 is a flowchart showing the operation of the present invention.

Claims (4)

배전선로를 흐르는 전류값을 측정한 아날로그 신호를 전파정류하면서 증폭 또는 감소시키는 전류 및 전치증폭부(2)와, 상기의 아날로그/디지탈 변환(3)를 통해 디지탈 신호를 입력받으면서 전체적인 동작을 제어하는 단일칩 마이크로 프로세서(4)와, 상기 단일칩 마이크로 프로세서(4)로 각 메뉴의 선택 및 설정값을 인터페이스(5)를 통해 사용자가 입력시키는 키스위치부(6)와, 상기 전류값과 사용자가 설정 입력한 기준값을 비교하는 단일칩 마이크로 프로세서(4)에서 절대비교값의 크기에 따라 정상상태와 이상상태의 샘플링 시간을 달리하여 저장하는 백업램(9)과, 상기 단일칩 마이크로 프로세서(4)에서 인터페이스(5)를 통한 출력에 의해 모드의 종류 및 설정과정들을 표시하는 LCD(10)와, 상기 단일칩 마이크로 프로세서(4)에서 출력되는 백업램(9)의 저장데이타를 퍼스널 컴퓨터(12)로 출력하는 직렬포트(11)들로 구성됨을 특징으로 하는 이상전류 검출 장치.Controlling the overall operation while receiving digital signals through the current and preamplifier (2) and the analog / digital conversion (3) to amplify or reduce the analog signal measured by the current value flowing through the distribution line while full-wave rectifying The single-chip microprocessor (4), the single-chip microprocessor (4), the key switch unit 6 for the user to input the selection and setting value of each menu via the interface (5), the current value and the user In the single-chip microprocessor (4) for comparing the set reference value, the backup RAM (9) for storing the sampling time of the normal state and the abnormal state according to the magnitude of the absolute comparison value, and the single-chip microprocessor (4) Storage of the backup RAM 9 output from the single-chip microprocessor 4 and the LCD 10 for displaying the type and setting processes of the mode by the output through the interface 5 Over current detection device, characterized by the itaconic configured with the serial port 11 for output to the personal computer 12. 제1항에 있어서, 상기의 백업램(9)을 분리시킨 상태에서 퍼스널 컴퓨터(12)로 부터 선택신호(A0)(A1)를 입력받는 리드/라이트 제어부(14)에서 포트C(16)를 통해 읽기신호(RD), 쓰기 신호(WR) 및 칩 선택신호(CSI)∼(CSN)를 출력하고, 상기 퍼스널 컴퓨터(12)와 데이타(D0)∼(D7)를 주고받는 데이타 버스 버퍼(15)에서는 포트B(17)에서 어드레스 제너레이터(18)를 통해 지정한 각 어드레스의 저장데이타를 포트A(19)를 경유하여 출력하도록 한 램드라이버(13)를 이용하여 분석할 수 있도록 한 이상 전류 검출장치.The read / write control unit 14 which receives the selection signal A0 (A1) from the personal computer 12 while the backup RAM 9 is removed from the port C16. A data bus buffer 15 for outputting a read signal RD, a write signal WR, and chip select signals CSI to CSN and exchanging data D0 to D7 with the personal computer 12. ), The abnormal current detection device capable of analyzing the stored data of each address designated by the address generator 18 in the port B 17 by using the ram driver 13 outputted via the port A 19. . 제1항에 있어서, 단일칩 마이크로 프로세서(4)는 정상전류 상태에서는 비교적 적은 시간단위인 1초 내지 999초마다 전류값을 저장하고 이상전류 상태에서는 비교적 빠른 시간단위인 600Hz마다 전류값을 저장하도록 한 이상전류 검출장치.2. The single-chip microprocessor (4) according to claim 1, wherein the single-chip microprocessor (4) stores the current value every 1 second to 999 seconds, which is a relatively small time unit in the normal current state, and stores the current value every 600 Hz, which is a relatively fast time unit in the abnormal current state. One abnormal current detection device. 제1항에 있어서, 백업램(9)에 입력시킨 저장데이타를 장시간 보전하면서 전류공급상태를 분석할 수 있도록 한 이상전류 검출 장치.The abnormal current detection device according to claim 1, wherein the abnormal current detection device makes it possible to analyze the current supply state while preserving the stored data input to the backup RAM (9) for a long time. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940001038A 1994-01-20 1994-01-20 Abnormal current detector KR950023982A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940001038A KR950023982A (en) 1994-01-20 1994-01-20 Abnormal current detector

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KR1019940001038A KR950023982A (en) 1994-01-20 1994-01-20 Abnormal current detector

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KR950023982A true KR950023982A (en) 1995-08-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100382659B1 (en) * 1999-07-28 2003-05-09 가부시끼가이샤 도시바 A digital protection relay

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100382659B1 (en) * 1999-07-28 2003-05-09 가부시끼가이샤 도시바 A digital protection relay

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