JPS5468950A - Short-circuit protective relay system - Google Patents

Short-circuit protective relay system

Info

Publication number
JPS5468950A
JPS5468950A JP13457577A JP13457577A JPS5468950A JP S5468950 A JPS5468950 A JP S5468950A JP 13457577 A JP13457577 A JP 13457577A JP 13457577 A JP13457577 A JP 13457577A JP S5468950 A JPS5468950 A JP S5468950A
Authority
JP
Japan
Prior art keywords
detector
current
short
circuit
output
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.)
Granted
Application number
JP13457577A
Other languages
Japanese (ja)
Other versions
JPS6238928B2 (en
Inventor
Hiroshi Haga
Hiroshi Sasaki
Masaaki Shiga
Original Assignee
Chubu Electric Power Co Inc
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 Chubu Electric Power Co Inc, Hitachi Ltd filed Critical Chubu Electric Power Co Inc
Priority to JP52134575A priority Critical patent/JPS6238928B2/ja
Publication of JPS5468950A publication Critical patent/JPS5468950A/en
Publication of JPS6238928B2 publication Critical patent/JPS6238928B2/ja
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To detect the short-circuit at the end of a heavy load line or a long line, by providing a current variation width detector for detecting the variation width of the line current and a logic circuit for interrupting the output of the detector by that of a load turn-on detector.
CONSTITUTION: The line current is detected by a current transformer CT. The output of the current transformer is applied to the current variation width detector 1 which detects that the variation width of vector of the current exceeds a predetermined value and to a current fall detector 2 which detects that the fall width of the current exceeds a predetermined value. An output unit 4 is driven through the logic circuit 3 to operate a circuit breaker CB1. At the time of turn-on of partial load, the detector 2 operates and the output of the detector 1 is interrupted by the logic circuit 3. At the time of short-circuit, only the detector 1 operates to apply an output to the output unit 4. Therefore, the short-circuit is easily detected even if the the line is long and has a high impedance.
COPYRIGHT: (C)1979,JPO&Japio
JP52134575A 1977-11-11 1977-11-11 Expired JPS6238928B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52134575A JPS6238928B2 (en) 1977-11-11 1977-11-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52134575A JPS6238928B2 (en) 1977-11-11 1977-11-11

Publications (2)

Publication Number Publication Date
JPS5468950A true JPS5468950A (en) 1979-06-02
JPS6238928B2 JPS6238928B2 (en) 1987-08-20

Family

ID=15131549

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52134575A Expired JPS6238928B2 (en) 1977-11-11 1977-11-11

Country Status (1)

Country Link
JP (1) JPS6238928B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105938556A (en) * 2016-04-22 2016-09-14 复旦大学 Wide line detection algorithm based on water flow method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105938556A (en) * 2016-04-22 2016-09-14 复旦大学 Wide line detection algorithm based on water flow method

Also Published As

Publication number Publication date
JPS6238928B2 (en) 1987-08-20

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