KR0146148B1 - 3상 과전류 계전기의 입력회로 및 그 감시방법 - Google Patents
3상 과전류 계전기의 입력회로 및 그 감시방법Info
- Publication number
- KR0146148B1 KR0146148B1 KR1019920021024A KR920021024A KR0146148B1 KR 0146148 B1 KR0146148 B1 KR 0146148B1 KR 1019920021024 A KR1019920021024 A KR 1019920021024A KR 920021024 A KR920021024 A KR 920021024A KR 0146148 B1 KR0146148 B1 KR 0146148B1
- Authority
- KR
- South Korea
- Prior art keywords
- current
- input circuit
- sample
- adder
- output signal
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
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
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Claims (2)
- 입력전류(ia, ib, ic)에 대한 각각의 전류치를 결정하는 보조변류기(1)와, 상기 보조변류기(1)의 출력신호를 필터링하는 필터부(2)와, 상기 필터부(2)의 출력신호를 표본화하는 샘플앤드홀드부(3)와, 상기 보조변류기(1)의 출력신호를 합산하는 가산기(6)와, 상기 가산기(6)의 출력신호를 표본화하는 샘플앤드홀드부(7)와, 상기 샘플앤드홀드부(3)(7)의 출력신호를 각기 디지탈신호로 변환하는 아날로그/디지탈변환부(4)와, 상기 아날로그/디지탈변환부(4)의 출력신호를 연산하여 상기 샘플앤드홀드부(3)의 출력신호에 따른 필터부 영상분전류(Io)와 상기 샘플앤드홀드부(7)의 출력신호에 따른 가산기부 영상분전류(Io')를 구한 후 차를 비교하여 고장여부를 판단하는 마이크로프로세서(5)로 구성하여 된 것을 특징으로 하는 3상 과전류 계전기의 입력회로.
- 입력전류(ia, ib, ic)의 각 전류치를 구한 후 필터부 영상분전류(Io)를 구하는 제 1단계와, 상기 제 1단계의 각 전류치를 가산기(6)에서 합산(Sum(I))후 가산기부 영상분전류(Io')를 구하는 제 2단계와, 상기 입력전류(ia, ib, ic)중 가장 큰 전류의 반을 취하여 ε을 설정하는 제 3단계와, 상기 제 1단계와 제 2단계에서 구한 필터부 영상분전류(Io)와 가산기부 영상분전류(Io')의 차이를 비교하여 고장여부를 판단하는 제 4단계로 이루어짐을 특징으로 하는 3상 과전류 계전기의 입력회로 감시방법.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019920021024A KR0146148B1 (ko) | 1992-11-10 | 1992-11-10 | 3상 과전류 계전기의 입력회로 및 그 감시방법 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019920021024A KR0146148B1 (ko) | 1992-11-10 | 1992-11-10 | 3상 과전류 계전기의 입력회로 및 그 감시방법 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR940012420A KR940012420A (ko) | 1994-06-23 |
| KR0146148B1 true KR0146148B1 (ko) | 1998-10-01 |
Family
ID=19342816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019920021024A Expired - Fee Related KR0146148B1 (ko) | 1992-11-10 | 1992-11-10 | 3상 과전류 계전기의 입력회로 및 그 감시방법 |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0146148B1 (ko) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100618255B1 (ko) * | 1999-12-29 | 2006-09-01 | 두산인프라코어 주식회사 | 모터 과전류 검출회로 |
-
1992
- 1992-11-10 KR KR1019920021024A patent/KR0146148B1/ko not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR940012420A (ko) | 1994-06-23 |
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