KR100451774B1 - 지락 검출 장치 - Google Patents
지락 검출 장치 Download PDFInfo
- Publication number
- KR100451774B1 KR100451774B1 KR10-2002-0007970A KR20020007970A KR100451774B1 KR 100451774 B1 KR100451774 B1 KR 100451774B1 KR 20020007970 A KR20020007970 A KR 20020007970A KR 100451774 B1 KR100451774 B1 KR 100451774B1
- Authority
- KR
- South Korea
- Prior art keywords
- ground fault
- ground
- microprocessor
- current
- voltage
- Prior art date
Links
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Theoretical Computer Science (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
Description
Claims (3)
- ZCT를 통과한 영상전류의 서지 또는 노이즈를 제거한 후 이를 전압 형태로 변환하기 위해 병렬로 연결된 배리스터(Varistor), 캐패시터 및 저항;상기 변환된 전압을 일정 레벨의 전압 이하로 조절하기 위한 다이오드;상기 다이오드에서 출력된 신호의 고조파를 필터링하기 위한 고조파 필터;상기 고조파 필터를 거쳐 필터링 된 신호를 증폭하기 위한 증폭기; 그리고,상기 증폭기의 출력 신호를 디지털 신호로 변환하기 위한 A/D 컨버터와, 상기 A/D 컨버터에 의해 변환된 디지털 신호를 필터링하기 위한 DFT(Discrete Fourier Transform)와, 상기 DFT에 의해 필터링된 디지털 신호를 이용하여 지락 전류를 판단하는 지락 전류 판단부로 이루어진 마이크로프로세서를 포함하는 것을 특징으로 하는 지락 검출 장치.
- 삭제
- 상기 제 1 항에 있어서, 상기 마이크로프로세서를 보호하기 위해 상기 증폭기와 상기 마이크로프로세서의 사이에 각각 저항과 다이오드를 하나 더 구비하는 것을 특징으로 하는 지락 검출 장치.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2002-0007970A KR100451774B1 (ko) | 2002-02-14 | 2002-02-14 | 지락 검출 장치 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2002-0007970A KR100451774B1 (ko) | 2002-02-14 | 2002-02-14 | 지락 검출 장치 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20030068267A KR20030068267A (ko) | 2003-08-21 |
KR100451774B1 true KR100451774B1 (ko) | 2004-10-08 |
Family
ID=32221375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR10-2002-0007970A KR100451774B1 (ko) | 2002-02-14 | 2002-02-14 | 지락 검출 장치 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100451774B1 (ko) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR930011359A (ko) * | 1991-11-08 | 1993-06-24 | 이기원 | 디지탈 배전선로 보호시스템 |
KR950026073A (ko) * | 1994-02-25 | 1995-09-18 | 사또 후미오 | 지락전류로부터 추출된 직류성분에 의하여 지락을 검출하는 계자지락 검출기 및 계자지락계전기 |
JPH08331752A (ja) * | 1995-06-01 | 1996-12-13 | Togami Electric Mfg Co Ltd | 地絡事故検出方法 |
KR20000007581U (ko) * | 1998-10-01 | 2000-05-06 | 정기호 | 사고전류치의 저장기능을 갖는 디지털형 과전류 계전기 |
-
2002
- 2002-02-14 KR KR10-2002-0007970A patent/KR100451774B1/ko active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR930011359A (ko) * | 1991-11-08 | 1993-06-24 | 이기원 | 디지탈 배전선로 보호시스템 |
KR950026073A (ko) * | 1994-02-25 | 1995-09-18 | 사또 후미오 | 지락전류로부터 추출된 직류성분에 의하여 지락을 검출하는 계자지락 검출기 및 계자지락계전기 |
JPH08331752A (ja) * | 1995-06-01 | 1996-12-13 | Togami Electric Mfg Co Ltd | 地絡事故検出方法 |
KR20000007581U (ko) * | 1998-10-01 | 2000-05-06 | 정기호 | 사고전류치의 저장기능을 갖는 디지털형 과전류 계전기 |
Also Published As
Publication number | Publication date |
---|---|
KR20030068267A (ko) | 2003-08-21 |
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