JPS5471353A - Protection relay - Google Patents

Protection relay

Info

Publication number
JPS5471353A
JPS5471353A JP13765877A JP13765877A JPS5471353A JP S5471353 A JPS5471353 A JP S5471353A JP 13765877 A JP13765877 A JP 13765877A JP 13765877 A JP13765877 A JP 13765877A JP S5471353 A JPS5471353 A JP S5471353A
Authority
JP
Japan
Prior art keywords
wave
negative
positive
band
pass filter
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
JP13765877A
Other languages
Japanese (ja)
Other versions
JPS5842692B2 (en
Inventor
Eiichi Okamoto
Ryotaro Kondo
Takao Fujisawa
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.)
Toshiba Corp
Tokyo Electric Power Co Holdings Inc
Original Assignee
Toshiba Corp
Tokyo Electric Power Co Inc
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Electric Power Co Inc, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP52137658A priority Critical patent/JPS5842692B2/en
Publication of JPS5471353A publication Critical patent/JPS5471353A/en
Publication of JPS5842692B2 publication Critical patent/JPS5842692B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Protection Of Transformers (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: To prevent surely misoperations by detecting reliably an accident and an inrush current when it flows with a digital arithmetic unit.
CONSTITUTION: Input data converted to digital code are applied to a positive rectifying circuit 20 and a negative rectifying circuit 21, separated to a positive wave and a negative wave, and each of them is applied to a positive band-pass filter 22 and a negative band-pass filter 23 respectively to isolate a fundamental wave component only from a positive wave and a negative wave. Each fundamental wave component isolated from both band-pass filters 22, 23 id applied to an arithmetic unit for a positive wave 24 and that for a negative wave 25 respectively to perform a relay decision operation and its result is applied to a logical unit 26 to detect a disagreement.
COPYRIGHT: (C)1979,JPO&Japio
JP52137658A 1977-11-16 1977-11-16 Protective relay device Expired JPS5842692B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52137658A JPS5842692B2 (en) 1977-11-16 1977-11-16 Protective relay device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52137658A JPS5842692B2 (en) 1977-11-16 1977-11-16 Protective relay device

Publications (2)

Publication Number Publication Date
JPS5471353A true JPS5471353A (en) 1979-06-07
JPS5842692B2 JPS5842692B2 (en) 1983-09-21

Family

ID=15203777

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52137658A Expired JPS5842692B2 (en) 1977-11-16 1977-11-16 Protective relay device

Country Status (1)

Country Link
JP (1) JPS5842692B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57160324A (en) * 1981-03-26 1982-10-02 Mitsubishi Electric Corp Transformer protecting relay unit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5061642A (en) * 1973-10-01 1975-05-27

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5061642A (en) * 1973-10-01 1975-05-27

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57160324A (en) * 1981-03-26 1982-10-02 Mitsubishi Electric Corp Transformer protecting relay unit
JPS6142492B2 (en) * 1981-03-26 1986-09-22 Mitsubishi Electric Corp

Also Published As

Publication number Publication date
JPS5842692B2 (en) 1983-09-21

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