JPS54101141A - System for protecting transformer - Google Patents
System for protecting transformerInfo
- Publication number
- JPS54101141A JPS54101141A JP762778A JP762778A JPS54101141A JP S54101141 A JPS54101141 A JP S54101141A JP 762778 A JP762778 A JP 762778A JP 762778 A JP762778 A JP 762778A JP S54101141 A JPS54101141 A JP S54101141A
- Authority
- JP
- Japan
- Prior art keywords
- error
- trouble
- current
- sampling
- instrumental
- 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.)
- Granted
Links
Landscapes
- Protection Of Transformers (AREA)
Abstract
PURPOSE: To prevent an error of approximation from affecting the determination of a trouble through forecasting or the error by previously giving a relation required for obtaining the error from the value of the exciting current to the protective system.
CONSTITUTION: The current and voltage measured on the primary and secondary sides by an instrumental current transformer CT and an instrumental voltage transformer PT and held and sampled in a sampling and holding circuit SH. The output of the sampling and holding circuit is supplied through an analog-to-digiatal converter circuit AD to a digital operational unit MDP. The digital operational unit MDP derives the error from the value of the exciting current and determines a trouble according to the error. When it determines a trouble, it supplies a trip signal to a circuit breaker DB.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP762778A JPS54101141A (en) | 1978-01-26 | 1978-01-26 | System for protecting transformer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP762778A JPS54101141A (en) | 1978-01-26 | 1978-01-26 | System for protecting transformer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54101141A true JPS54101141A (en) | 1979-08-09 |
JPS5639133B2 JPS5639133B2 (en) | 1981-09-10 |
Family
ID=11671051
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP762778A Granted JPS54101141A (en) | 1978-01-26 | 1978-01-26 | System for protecting transformer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54101141A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3840887A1 (en) * | 1988-12-05 | 1990-06-07 | Asea Brown Boveri | METHOD FOR PROTECTING A TRANSFORMER AND DEVICE FOR CARRYING OUT THE METHOD |
-
1978
- 1978-01-26 JP JP762778A patent/JPS54101141A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3840887A1 (en) * | 1988-12-05 | 1990-06-07 | Asea Brown Boveri | METHOD FOR PROTECTING A TRANSFORMER AND DEVICE FOR CARRYING OUT THE METHOD |
Also Published As
Publication number | Publication date |
---|---|
JPS5639133B2 (en) | 1981-09-10 |
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