JPS5371244A - Grounding direction relay system - Google Patents

Grounding direction relay system

Info

Publication number
JPS5371244A
JPS5371244A JP14646476A JP14646476A JPS5371244A JP S5371244 A JPS5371244 A JP S5371244A JP 14646476 A JP14646476 A JP 14646476A JP 14646476 A JP14646476 A JP 14646476A JP S5371244 A JPS5371244 A JP S5371244A
Authority
JP
Japan
Prior art keywords
relay system
direction relay
grounding direction
phase current
zero phase
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
JP14646476A
Other languages
Japanese (ja)
Inventor
Goo Nohara
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 JP14646476A priority Critical patent/JPS5371244A/en
Publication of JPS5371244A publication Critical patent/JPS5371244A/en
Pending legal-status Critical Current

Links

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  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: To improve the sensitivity of detection without giving rise to increase of the treatment period with a treatment carried out by subtracting zero phase current at the prevailing instant from zero phase current memorized before a predetermined period of time.
COPYRIGHT: (C)1978,JPO&Japio
JP14646476A 1976-12-08 1976-12-08 Grounding direction relay system Pending JPS5371244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14646476A JPS5371244A (en) 1976-12-08 1976-12-08 Grounding direction relay system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14646476A JPS5371244A (en) 1976-12-08 1976-12-08 Grounding direction relay system

Publications (1)

Publication Number Publication Date
JPS5371244A true JPS5371244A (en) 1978-06-24

Family

ID=15408219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14646476A Pending JPS5371244A (en) 1976-12-08 1976-12-08 Grounding direction relay system

Country Status (1)

Country Link
JP (1) JPS5371244A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59181917A (en) * 1983-03-31 1984-10-16 株式会社東芝 Ground-fault direction relay

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59181917A (en) * 1983-03-31 1984-10-16 株式会社東芝 Ground-fault direction relay

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