JPS52107549A - Differential current relay system - Google Patents

Differential current relay system

Info

Publication number
JPS52107549A
JPS52107549A JP2324576A JP2324576A JPS52107549A JP S52107549 A JPS52107549 A JP S52107549A JP 2324576 A JP2324576 A JP 2324576A JP 2324576 A JP2324576 A JP 2324576A JP S52107549 A JPS52107549 A JP S52107549A
Authority
JP
Japan
Prior art keywords
current
relay system
differential current
current relay
workable
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.)
Pending
Application number
JP2324576A
Other languages
Japanese (ja)
Inventor
Hiroshi Sasaki
Tomio Chiba
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2324576A priority Critical patent/JPS52107549A/en
Publication of JPS52107549A publication Critical patent/JPS52107549A/en
Pending legal-status Critical Current

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  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: To provide a countermeasure for transient error of a current transformer causing the operational formula to be effective only for both values within a workable tolerance, by detecting second higher harmonic element of the differential output current and by phase comparing the current across each terminal for a current value exceeding a prescribed value.
COPYRIGHT: (C)1977,JPO&Japio
JP2324576A 1976-03-05 1976-03-05 Differential current relay system Pending JPS52107549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2324576A JPS52107549A (en) 1976-03-05 1976-03-05 Differential current relay system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2324576A JPS52107549A (en) 1976-03-05 1976-03-05 Differential current relay system

Publications (1)

Publication Number Publication Date
JPS52107549A true JPS52107549A (en) 1977-09-09

Family

ID=12105203

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2324576A Pending JPS52107549A (en) 1976-03-05 1976-03-05 Differential current relay system

Country Status (1)

Country Link
JP (1) JPS52107549A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04364317A (en) * 1991-06-11 1992-12-16 Mitsubishi Electric Corp Lock system for current differential relay

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04364317A (en) * 1991-06-11 1992-12-16 Mitsubishi Electric Corp Lock system for current differential relay

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