JPS54114738A - Protective relay - Google Patents

Protective relay

Info

Publication number
JPS54114738A
JPS54114738A JP2226978A JP2226978A JPS54114738A JP S54114738 A JPS54114738 A JP S54114738A JP 2226978 A JP2226978 A JP 2226978A JP 2226978 A JP2226978 A JP 2226978A JP S54114738 A JPS54114738 A JP S54114738A
Authority
JP
Japan
Prior art keywords
terminal
zero
signal
circuit
phase voltage
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
JP2226978A
Other languages
Japanese (ja)
Other versions
JPS6111052B2 (en
Inventor
Yoshiaki Yamamoto
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
Original Assignee
Toshiba Corp
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 Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2226978A priority Critical patent/JPS54114738A/en
Publication of JPS54114738A publication Critical patent/JPS54114738A/en
Publication of JPS6111052B2 publication Critical patent/JPS6111052B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To prevent mal-operation due to internal current by the procedure in which even in case where operation is made in multiple terminal system where several terminals are broken, zero-phase voltage is selected automatically from zero-phase voltages transferred from each terminal and then introduced into relay.
CONSTITUTION: The zero-phase voltages VOA to VOC of the plural terminals A to C and the using condition signal S for the breaker or line breaker of the terminal A are logically judged by the logical operation circuits 31A to 31C and 33A to 33C, and when the breaker of one terminal is open-circuit, the zero-phase voltage of the other terminal is used as a criterion, whereas when it is close-circuit, the zero-phase voltage of self-terminal is used. For example, when terminals other than the terminal A are break terminals the using condition S for the terminal A becomes "1", so that the "and" circuits 31B and 31C are locked by the not condition -S for S. Thus, the output signal alone of the circuit 31A becomes square wave signal and by a signal converted the signal into the run "1" signal at the time delay circuit 33A, the gate circuit 35A alone becomes opened state. Accordingly, the zero-phase voltage VOA' of the terminal A is used for internal charge current supplement.
COPYRIGHT: (C)1979,JPO&Japio
JP2226978A 1978-02-28 1978-02-28 Protective relay Granted JPS54114738A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2226978A JPS54114738A (en) 1978-02-28 1978-02-28 Protective relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2226978A JPS54114738A (en) 1978-02-28 1978-02-28 Protective relay

Publications (2)

Publication Number Publication Date
JPS54114738A true JPS54114738A (en) 1979-09-07
JPS6111052B2 JPS6111052B2 (en) 1986-04-01

Family

ID=12078037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2226978A Granted JPS54114738A (en) 1978-02-28 1978-02-28 Protective relay

Country Status (1)

Country Link
JP (1) JPS54114738A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01169652U (en) * 1988-05-23 1989-11-30
JPH0246351A (en) * 1988-08-08 1990-02-15 Daishowa Seiki Co Ltd Epicyclic transmission

Also Published As

Publication number Publication date
JPS6111052B2 (en) 1986-04-01

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