JPS5468951A - Non-synchronization detector - Google Patents

Non-synchronization detector

Info

Publication number
JPS5468951A
JPS5468951A JP13462977A JP13462977A JPS5468951A JP S5468951 A JPS5468951 A JP S5468951A JP 13462977 A JP13462977 A JP 13462977A JP 13462977 A JP13462977 A JP 13462977A JP S5468951 A JPS5468951 A JP S5468951A
Authority
JP
Japan
Prior art keywords
synchronization
slip
area
detected
loci
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
JP13462977A
Other languages
Japanese (ja)
Inventor
Teruhisa Ono
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 JP13462977A priority Critical patent/JPS5468951A/en
Publication of JPS5468951A publication Critical patent/JPS5468951A/en
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: To quickly detect non-synchronization in terms of that the non-synchronization is detected at the first slip of impedance loci and one distance relay has operated in a predetermined time after the detection.
CONSTITUTION: The impedance loci 7, 7' at the time of non-synchronization are deteced by quadrilateral distance relays 3, 4 and ohm relays 5, 6. The first slip is that the impedance loci 7 enters an area 13 from a area 9 through some areas. The second slip is that the loci re-enters the area 9 through an area 13. A non-synchronization output is generated under the condition that the non-synchronization is detected at the first slip and detected at the second slip. Even if the disconnection of line fails at the first slip, the non-synchronization can be quickly detected. Therefore, the separation of line can be surely performed.
COPYRIGHT: (C)1979,JPO&Japio
JP13462977A 1977-11-11 1977-11-11 Non-synchronization detector Pending JPS5468951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13462977A JPS5468951A (en) 1977-11-11 1977-11-11 Non-synchronization detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13462977A JPS5468951A (en) 1977-11-11 1977-11-11 Non-synchronization detector

Publications (1)

Publication Number Publication Date
JPS5468951A true JPS5468951A (en) 1979-06-02

Family

ID=15132832

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13462977A Pending JPS5468951A (en) 1977-11-11 1977-11-11 Non-synchronization detector

Country Status (1)

Country Link
JP (1) JPS5468951A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51108255A (en) * 1975-03-19 1976-09-25 Hitachi Ltd DOKIHAZUREKENSHUTSUSOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51108255A (en) * 1975-03-19 1976-09-25 Hitachi Ltd DOKIHAZUREKENSHUTSUSOCHI

Similar Documents

Publication Publication Date Title
JPS5468951A (en) Non-synchronization detector
JPS642199A (en) Automatic fire alarm
JPS5243494A (en) Multiple point gas detecting and alarming system
JPS51134850A (en) D.c. earth protective relay
JPS5471347A (en) State detector
ATE151536T1 (en) DETECTION OF FAULTS IN POWER LINES
JPS5366548A (en) Grounding fault detector for dc circuit
JPS5217041A (en) System for detecting a point on a transmission line where an abnormal state occurs
JPS51113132A (en) System for detecting disconnection trouble
JPS53113500A (en) Detector adapter
JPS53130079A (en) Disconnection detecting relay
JPS5373336A (en) System for detecting trouble in cable
JPS51121154A (en) Disconnection detection system for d-c transmission line
JPS5297566A (en) Method of detecting delaying state of articles on conveyor
JPS51147734A (en) Leak detecting apparatus
JPS52123896A (en) Detection circuit of disconnection of fire sensing circuit
JPS525443A (en) Wire disconnection detecting process
JPS5218346A (en) Center-failure detecting system
JPS52106446A (en) Absent phase detector
JPS5214846A (en) Unbalance detection relaying system
JPS5576927A (en) Abnormal rotation detector for rotary machine
JPS5246459A (en) Protecting device of neutral conductor grounding detection
JPS5397811A (en) Detector for abnormality in synchronism
JPS545546A (en) Desconnection detector for transmission line
JPS524897A (en) Gas detector