JPS5298955A - Carrier protection relay system - Google Patents

Carrier protection relay system

Info

Publication number
JPS5298955A
JPS5298955A JP1404176A JP1404176A JPS5298955A JP S5298955 A JPS5298955 A JP S5298955A JP 1404176 A JP1404176 A JP 1404176A JP 1404176 A JP1404176 A JP 1404176A JP S5298955 A JPS5298955 A JP S5298955A
Authority
JP
Japan
Prior art keywords
relay system
protection relay
failure
carrier protection
carrier
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
JP1404176A
Other languages
Japanese (ja)
Inventor
Kazuo Seo
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 JP1404176A priority Critical patent/JPS5298955A/en
Publication of JPS5298955A publication Critical patent/JPS5298955A/en
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: In a carrier protection relay system descriminating outside and inside of a failure by mutual connection of a result of determination of orientation of failure respectively on both ends of a power supply line, to prevent a false action by a zero-phase circulating current which causes a problem at a paralleled multiple connection and to allow a positive operation when a failure is caused inside the area.
COPYRIGHT: (C)1977,JPO&Japio
JP1404176A 1976-02-13 1976-02-13 Carrier protection relay system Pending JPS5298955A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1404176A JPS5298955A (en) 1976-02-13 1976-02-13 Carrier protection relay system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1404176A JPS5298955A (en) 1976-02-13 1976-02-13 Carrier protection relay system

Publications (1)

Publication Number Publication Date
JPS5298955A true JPS5298955A (en) 1977-08-19

Family

ID=11850019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1404176A Pending JPS5298955A (en) 1976-02-13 1976-02-13 Carrier protection relay system

Country Status (1)

Country Link
JP (1) JPS5298955A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08196033A (en) * 1994-04-15 1996-07-30 Chubu Electric Power Co Inc Method, device, and apparatus for orienting faulty section of transmission distribution line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08196033A (en) * 1994-04-15 1996-07-30 Chubu Electric Power Co Inc Method, device, and apparatus for orienting faulty section of transmission distribution line

Similar Documents

Publication Publication Date Title
JPS5298955A (en) Carrier protection relay system
JPS5359330A (en) Mis-output preventing system
JPS5211722A (en) Power failure protection circuit
JPS5329549A (en) Protection device for dc power transmission
JPS5366548A (en) Grounding fault detector for dc circuit
JPS5284423A (en) Invertor protection device
JPS5314353A (en) Decision circuit for inverter actuation
JPS5213641A (en) Power failure detector
JPS5310815A (en) Inverter device
JPS5347925A (en) Inverter overvoltage protection system
JPS52153142A (en) Transformer protective relay system
JPS5330756A (en) Protection system for dc transmission line
JPS5340843A (en) Detector for step-out
JPS52153141A (en) Transformer protective relay system
JPS528449A (en) Direction comparison relay device
JPS5315546A (en) Protective relay system
JPS52149713A (en) Electric vehicle protection device
JPS5275299A (en) Fire receiver
JPS52101457A (en) Control circuit in control type power conversion circuit
JPS52139934A (en) Phase comparison system carry protection relay
JPS52106427A (en) Inverter equipment
JPS5321731A (en) Inverter device
JPS5348434A (en) System mode switching method and its equipment
JPS5376786A (en) Receiver of fire alarm system
JPS52101446A (en) Earth protective device