JPS54101141A - System for protecting transformer - Google Patents

System for protecting transformer

Info

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
Application number
JP762778A
Other languages
Japanese (ja)
Other versions
JPS5639133B2 (en
Inventor
Yoshiaki Akimoto
Eiichi Okamoto
Shogo Nishida
Toshiaki Sakaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Tokyo Electric Power Company Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Mitsubishi Electric Corp
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.)
Filing date
Publication date
Application filed by Tokyo Electric Power Co Inc, Mitsubishi Electric Corp filed Critical Tokyo Electric Power Co Inc
Priority to JP762778A priority Critical patent/JPS54101141A/en
Publication of JPS54101141A publication Critical patent/JPS54101141A/en
Publication of JPS5639133B2 publication Critical patent/JPS5639133B2/ja
Granted legal-status Critical Current

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
JP762778A 1978-01-26 1978-01-26 System for protecting transformer Granted JPS54101141A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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