JPS57152736A - Signal generator for signal transmission utilizing distribution line - Google Patents

Signal generator for signal transmission utilizing distribution line

Info

Publication number
JPS57152736A
JPS57152736A JP3899781A JP3899781A JPS57152736A JP S57152736 A JPS57152736 A JP S57152736A JP 3899781 A JP3899781 A JP 3899781A JP 3899781 A JP3899781 A JP 3899781A JP S57152736 A JPS57152736 A JP S57152736A
Authority
JP
Japan
Prior art keywords
switch
transformer
distribution line
earth
signal
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
JP3899781A
Other languages
Japanese (ja)
Other versions
JPS6367777B2 (en
Inventor
Takao Miyashita
Eiichi Ishikawa
Atsuhiro Yoshizaki
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 JP3899781A priority Critical patent/JPS57152736A/en
Publication of JPS57152736A publication Critical patent/JPS57152736A/en
Publication of JPS6367777B2 publication Critical patent/JPS6367777B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5466—Systems for power line communications using three phases conductors

Abstract

PURPOSE:To make a switch, by which the earth current is flowed, low-dielectric strength and make the switch small size to quicken the response, by utilizing a transformer to generate a zero-phase current. CONSTITUTION:The primary winding of a transformer 10 is connected between one of three phases of a distribution line 3 and the earth, and a switch 11 and a capacitor 12 are connected in series between terminals of the secondary winding of the transformer 10. Otherwise, the primary winding of the transformer 10 is connected between one of three phases of the distribution line 3 and the earth through a capacitor 13, and the switch 11 or the switch 11 and the capacitor 12 are connected between terminals of the secondary winding of the transformer 10. The magnitude of an earth current (i) is controlled by switching the switch 11 in accordance with a signal to generate a zero-phase current.
JP3899781A 1981-03-17 1981-03-17 Signal generator for signal transmission utilizing distribution line Granted JPS57152736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3899781A JPS57152736A (en) 1981-03-17 1981-03-17 Signal generator for signal transmission utilizing distribution line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3899781A JPS57152736A (en) 1981-03-17 1981-03-17 Signal generator for signal transmission utilizing distribution line

Publications (2)

Publication Number Publication Date
JPS57152736A true JPS57152736A (en) 1982-09-21
JPS6367777B2 JPS6367777B2 (en) 1988-12-27

Family

ID=12540765

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3899781A Granted JPS57152736A (en) 1981-03-17 1981-03-17 Signal generator for signal transmission utilizing distribution line

Country Status (1)

Country Link
JP (1) JPS57152736A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62161227A (en) * 1986-01-10 1987-07-17 Toyo Commun Equip Co Ltd Signal transmission method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62161227A (en) * 1986-01-10 1987-07-17 Toyo Commun Equip Co Ltd Signal transmission method

Also Published As

Publication number Publication date
JPS6367777B2 (en) 1988-12-27

Similar Documents

Publication Publication Date Title
JPS5562717A (en) Three-winding transformer
JPS57152736A (en) Signal generator for signal transmission utilizing distribution line
JPS5441419A (en) Three-phase.two-phase power conversion transformer
JPS5464417A (en) Generation circuit for high voltage
FR2321208A1 (en) Detection of leakage current to earth - uses differential current transformer whose core is saturated by leakage current
JPS5543891A (en) Transformer
JPS5513949A (en) Coil in transformer
JPS5790923A (en) Transformer
GB2090485A (en) Device for controlling the voltage and reactance in an electric circuit
JPS53147228A (en) Differential current transformer for use in ac control system
JPS55100068A (en) Rectifying source circuit
JPS52129475A (en) Load current detecting circuit
JPS5329536A (en) Breker making circuit for alternating-direct current conversion
JPS53106447A (en) 3-phase voltage compensating transformer and its utilization device
JPS5698808A (en) Three phase transformer
JPS5522809A (en) Trnasformer with loss change-over device
JPS54145949A (en) Automatic voltage fluctuation range controller
JPS57207314A (en) On-load tap changing transformer
JPS5730430A (en) Submarine relay device
JPS5421888A (en) Dielectric strength test equipment
JPS57148324A (en) Three-phase tap changing transformer
JPS5431295A (en) Direct current high voltage generator
JPS54117350A (en) Power source apparatus for arc welding machine
JPS5687870A (en) Improvement of disconnection detecting system
JPS52143466A (en) Checking system of breaker for wiring control device