JPS6489912A - Fusing detector of potential transformer - Google Patents

Fusing detector of potential transformer

Info

Publication number
JPS6489912A
JPS6489912A JP62243144A JP24314487A JPS6489912A JP S6489912 A JPS6489912 A JP S6489912A JP 62243144 A JP62243144 A JP 62243144A JP 24314487 A JP24314487 A JP 24314487A JP S6489912 A JPS6489912 A JP S6489912A
Authority
JP
Japan
Prior art keywords
phase
fusing
potential transformer
secondary side
different line
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
JP62243144A
Other languages
Japanese (ja)
Inventor
Noboru Umafuku
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 JP62243144A priority Critical patent/JPS6489912A/en
Publication of JPS6489912A publication Critical patent/JPS6489912A/en
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Fuses (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

PURPOSE:To make it possible to detect easily fusing of each phase fuse at primary side of a potential transformer by comparing phases of two different line voltages respectively on secondary side of the potential transformer. CONSTITUTION:A fusing detector 7 is constituted of phase comparison detectors 81-83 compare phases of two different line voltages respectively on secondary side of potential transformer 2 to detect phase difference between them. The fusing decision devices 91-93 decide whether phase differences detected by the phase comparison detectors 81-83 are 0 deg., fusing detection signals are outputted respectively as if fuses 3 of S phase, T phase and R phase are fusing, provided that the phase difference is 0 deg..
JP62243144A 1987-09-28 1987-09-28 Fusing detector of potential transformer Pending JPS6489912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62243144A JPS6489912A (en) 1987-09-28 1987-09-28 Fusing detector of potential transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62243144A JPS6489912A (en) 1987-09-28 1987-09-28 Fusing detector of potential transformer

Publications (1)

Publication Number Publication Date
JPS6489912A true JPS6489912A (en) 1989-04-05

Family

ID=17099441

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62243144A Pending JPS6489912A (en) 1987-09-28 1987-09-28 Fusing detector of potential transformer

Country Status (1)

Country Link
JP (1) JPS6489912A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5683547A (en) * 1990-11-21 1997-11-04 Hitachi, Ltd. Processing method and apparatus using focused energy beam
JP2016525210A (en) * 2013-07-02 2016-08-22 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． Problem detection in cable systems with fuses

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5683547A (en) * 1990-11-21 1997-11-04 Hitachi, Ltd. Processing method and apparatus using focused energy beam
JP2016525210A (en) * 2013-07-02 2016-08-22 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． Problem detection in cable systems with fuses

Similar Documents

Publication Publication Date Title
SE7901478L (en) DISTANCE RELAY PROTECTION
AU547436B2 (en) Detecting position of object
JPS6489912A (en) Fusing detector of potential transformer
EP0372240A3 (en) Zero voltage crossover detector for polyphase systems
EP0352951A3 (en) A.c. generator fault detector
GB1079374A (en) Unbalanced load detection in alternating current system
EP0041809B1 (en) Digital phase sequence detector
DE3267674D1 (en) High sensitivity differential protection device for the detection of earthed phase or neutral fault currents
GB1485792A (en) Electric circuit interrupters
EP0568914A3 (en)
JPS5610080A (en) Protecting system for parallel operation of inverter
FI890832A0 (en) DETECTOR AVAILABILITY / DETECTION OF NUCLEAR TYPE FOR MAINTENANCE OF GRAENSSNITTSNIVAO.
ES2049761T3 (en) INSTALLATION FOR THE CONTROLLED CONNECTION OF INDUCTIVE ELEMENTS IN THE HIGH VOLTAGE NETWORK.
KR930004184A (en) Power supply voltage phase synchronization signal misdetection device of elevator
JPS5465349A (en) Power source abnormality detector
JPS56139087A (en) Device for protecting inverter
SU805458A1 (en) Device for protection of electric-traction ac network of multipath portions
JP2701524B2 (en) Current transformer output circuit
JPS622866A (en) Controller of inverter
JPH03270633A (en) Ground relay device
JPS57166571A (en) Detection system for position of moving body
JPS5288747A (en) Protecting system for inverter
JPS6434131A (en) Protective relay
JPS56119562A (en) Synchronizing detection system
JPS5624618A (en) Protection circuit of current control circuit using direct current transformer