JPS54136639A - Transformer protective relay - Google Patents

Transformer protective relay

Info

Publication number
JPS54136639A
JPS54136639A JP4448078A JP4448078A JPS54136639A JP S54136639 A JPS54136639 A JP S54136639A JP 4448078 A JP4448078 A JP 4448078A JP 4448078 A JP4448078 A JP 4448078A JP S54136639 A JPS54136639 A JP S54136639A
Authority
JP
Japan
Prior art keywords
phase
output
inhibit
rush
circuit
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
JP4448078A
Other languages
Japanese (ja)
Inventor
Akira Okada
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
Original Assignee
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4448078A priority Critical patent/JPS54136639A/en
Publication of JPS54136639A publication Critical patent/JPS54136639A/en
Pending legal-status Critical Current

Links

Landscapes

  • Protection Of Transformers (AREA)

Abstract

PURPOSE: To suppress an output of the ratio differential element from each phase, by processing an output of in-rush waveform decision inhibit element to be made under "OR" condition through all phase components in the multiphase system.
CONSTITUTION: Paying attention to the fact that, the in-rush current, when applied an input voltage to the transformer of AC multiphase, comprise a second higher harmonic component, in at least one phase of the phases, exceeding a level of 15% of the fundamental wave component, an output 11ac, 11bc, 11cc of the in-rush waveform dicision inhibit element 11a, 11b, 11c, provided in each phase, after being combined by an OR circuit 14, is fed as a suppressing input to an inhibit circuit 13a, 13b, 13c, provided in each phase, and the generation of a trip command signal is prevented.
COPYRIGHT: (C)1979,JPO&Japio
JP4448078A 1978-04-14 1978-04-14 Transformer protective relay Pending JPS54136639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4448078A JPS54136639A (en) 1978-04-14 1978-04-14 Transformer protective relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4448078A JPS54136639A (en) 1978-04-14 1978-04-14 Transformer protective relay

Publications (1)

Publication Number Publication Date
JPS54136639A true JPS54136639A (en) 1979-10-23

Family

ID=12692691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4448078A Pending JPS54136639A (en) 1978-04-14 1978-04-14 Transformer protective relay

Country Status (1)

Country Link
JP (1) JPS54136639A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0417515A (en) * 1990-05-09 1992-01-22 Mitsubishi Electric Corp Protective relay unit for transformer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0417515A (en) * 1990-05-09 1992-01-22 Mitsubishi Electric Corp Protective relay unit for transformer

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