JPS5617546A - Protecting device for short circuit of transmission line - Google Patents

Protecting device for short circuit of transmission line

Info

Publication number
JPS5617546A
JPS5617546A JP9290579A JP9290579A JPS5617546A JP S5617546 A JPS5617546 A JP S5617546A JP 9290579 A JP9290579 A JP 9290579A JP 9290579 A JP9290579 A JP 9290579A JP S5617546 A JPS5617546 A JP S5617546A
Authority
JP
Japan
Prior art keywords
signal line
switch
reduction
short circuit
line voltage
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
JP9290579A
Other languages
Japanese (ja)
Other versions
JPS6149863B2 (en
Inventor
Akira Yasuda
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP9290579A priority Critical patent/JPS5617546A/en
Publication of JPS5617546A publication Critical patent/JPS5617546A/en
Publication of JPS6149863B2 publication Critical patent/JPS6149863B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/08—Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To cut off only the short-circuited signal line among those which are branch-connected to the master unit, by cutting off the signal line with reduction of the signal line voltage and furthermore closing again the signal line in case the voltage is still kept at a low level after the cutoff. CONSTITUTION:The reduction of the signal line voltage at the side of master unit 1 caused by switch 6 is detected by CPU8, and then relay 5 is driven to open switch to open switch 6. After this, when the signal line voltage becomes normal, the short circuit of the signal at the terminal side is decided with the open state kept for switch 6. And in case the reduction of the signal line voltage is still kept, noshort circuit of the signal line at the terminal side is decided to give the connection state to switch 6.
JP9290579A 1979-07-20 1979-07-20 Protecting device for short circuit of transmission line Granted JPS5617546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9290579A JPS5617546A (en) 1979-07-20 1979-07-20 Protecting device for short circuit of transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9290579A JPS5617546A (en) 1979-07-20 1979-07-20 Protecting device for short circuit of transmission line

Publications (2)

Publication Number Publication Date
JPS5617546A true JPS5617546A (en) 1981-02-19
JPS6149863B2 JPS6149863B2 (en) 1986-10-31

Family

ID=14067489

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9290579A Granted JPS5617546A (en) 1979-07-20 1979-07-20 Protecting device for short circuit of transmission line

Country Status (1)

Country Link
JP (1) JPS5617546A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6367842A (en) * 1986-09-09 1988-03-26 Mitsubishi Electric Corp Load controlling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6367842A (en) * 1986-09-09 1988-03-26 Mitsubishi Electric Corp Load controlling system

Also Published As

Publication number Publication date
JPS6149863B2 (en) 1986-10-31

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