JPS6434131A - Protective relay - Google Patents

Protective relay

Info

Publication number
JPS6434131A
JPS6434131A JP18762587A JP18762587A JPS6434131A JP S6434131 A JPS6434131 A JP S6434131A JP 18762587 A JP18762587 A JP 18762587A JP 18762587 A JP18762587 A JP 18762587A JP S6434131 A JPS6434131 A JP S6434131A
Authority
JP
Japan
Prior art keywords
zero
voltages
circuit
deviation
transformer
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
JP18762587A
Other languages
Japanese (ja)
Inventor
Koji Igarashi
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
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 filed Critical Toshiba Corp
Priority to JP18762587A priority Critical patent/JPS6434131A/en
Publication of JPS6434131A publication Critical patent/JPS6434131A/en
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE:To detect a fault on the secondary side of a potential transformer by a simple circuit by leading a zero-phase electric amount from the secondary and tertiary voltages of the transformer, and generating an output when a deviation is a predetermined value or more. CONSTITUTION:The secondary voltages VR, VS, BT of a potential transformer of a master/slave type connected to 3 phases are fed to a zero-phase electric amount leading circuit 24 to produce a zero-phase voltage V0. The tertiary voltages VR', VS', VT' of the same transformer are fed to another zero-phase electric amount leading circuit 25 to produce a zero-phase voltage V0'. These voltages V0, V0' are input to a deviation circuit 26 to detect a deviation (V0'-V0). If the value is larger than a predetermined value set to a level detector 27, an operation output signal is generated from a protective relay 17.
JP18762587A 1987-07-29 1987-07-29 Protective relay Pending JPS6434131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18762587A JPS6434131A (en) 1987-07-29 1987-07-29 Protective relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18762587A JPS6434131A (en) 1987-07-29 1987-07-29 Protective relay

Publications (1)

Publication Number Publication Date
JPS6434131A true JPS6434131A (en) 1989-02-03

Family

ID=16209382

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18762587A Pending JPS6434131A (en) 1987-07-29 1987-07-29 Protective relay

Country Status (1)

Country Link
JP (1) JPS6434131A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013135129A (en) * 2011-12-27 2013-07-08 Toshiba Corp Abnormality detection method of instrument transformer and protection method of circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013135129A (en) * 2011-12-27 2013-07-08 Toshiba Corp Abnormality detection method of instrument transformer and protection method of circuit

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