JPS5554443A - Electric current measuring instrument - Google Patents

Electric current measuring instrument

Info

Publication number
JPS5554443A
JPS5554443A JP10162878A JP10162878A JPS5554443A JP S5554443 A JPS5554443 A JP S5554443A JP 10162878 A JP10162878 A JP 10162878A JP 10162878 A JP10162878 A JP 10162878A JP S5554443 A JPS5554443 A JP S5554443A
Authority
JP
Japan
Prior art keywords
converter
tension side
transformer
current
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.)
Pending
Application number
JP10162878A
Other languages
Japanese (ja)
Inventor
Yoshisuke Takita
Tomio Fukushima
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.)
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Electric Manufacturing Co 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 Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Electric Manufacturing Co Ltd
Priority to JP10162878A priority Critical patent/JPS5554443A/en
Publication of JPS5554443A publication Critical patent/JPS5554443A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: To make it possible to use a miniature and inexpensive transformer and troidal coil for measurements of a high voltage and large current by insulating a high-tension side from a low-tension side by a photo transmitter circuit and then by obtaining power, needed for the high-tension side, from a bus line.
CONSTITUTION: The transformation output of iron-core current transformer 2 connected to bus 1 is inputted to the primary side of transformer by way of clipper circuit 3. Transformer 4 applies an alternating-current voltage across constant- voltage power supply 5. Troidal coil 6, on the other hand, induce a voltage equivalent to a bus current and its output is converted by integrating circuit 7 into an analog signal, which is further converted into a digital signal by A/D converter 8. Those integrating circuit 7 and A/D converter 8 are supplied with power from constant voltage power supply 5. Then, the output of A/D converter 8 is transmitted to D/A converter 10 at the low-tension side through light transmitter circuit 9 to insulate the high-tension side from the low-tension side. The output signal of D/A converter 10 is inputted to a current display unit by way of amplifier 11.
COPYRIGHT: (C)1980,JPO&Japio
JP10162878A 1978-08-19 1978-08-19 Electric current measuring instrument Pending JPS5554443A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10162878A JPS5554443A (en) 1978-08-19 1978-08-19 Electric current measuring instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10162878A JPS5554443A (en) 1978-08-19 1978-08-19 Electric current measuring instrument

Publications (1)

Publication Number Publication Date
JPS5554443A true JPS5554443A (en) 1980-04-21

Family

ID=14305659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10162878A Pending JPS5554443A (en) 1978-08-19 1978-08-19 Electric current measuring instrument

Country Status (1)

Country Link
JP (1) JPS5554443A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5726763A (en) * 1980-06-10 1982-02-12 Westinghouse Electric Corp Current monitoring device
JPS57151223A (en) * 1981-03-11 1982-09-18 Meidensha Electric Mfg Co Ltd Device for protecting dc line
JPS57149633U (en) * 1981-03-16 1982-09-20
JPS5920020A (en) * 1982-07-27 1984-02-01 Canon Inc High voltage power supply device
JPS62260517A (en) * 1986-04-30 1987-11-12 メルラン、ジエラン Apparatus for tripping breaker
JPS6387573U (en) * 1986-11-27 1988-06-07
JPS6463876A (en) * 1987-09-03 1989-03-09 Ngk Insulators Ltd Electroscope apparatus
JPS6463875A (en) * 1987-09-03 1989-03-09 Ngk Insulators Ltd Electroscope apparatus
JPH0545570U (en) * 1991-11-19 1993-06-18 四国電力株式会社 measuring device
JPH08196033A (en) * 1994-04-15 1996-07-30 Chubu Electric Power Co Inc Method, device, and apparatus for orienting faulty section of transmission distribution line
JP2019158621A (en) * 2018-03-13 2019-09-19 パナソニックＩｐマネジメント株式会社 Harness for branch and measurement system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4731891U (en) * 1971-04-21 1972-12-09

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4731891U (en) * 1971-04-21 1972-12-09

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5726763A (en) * 1980-06-10 1982-02-12 Westinghouse Electric Corp Current monitoring device
JPS57151223A (en) * 1981-03-11 1982-09-18 Meidensha Electric Mfg Co Ltd Device for protecting dc line
JPS57149633U (en) * 1981-03-16 1982-09-20
JPS5920020A (en) * 1982-07-27 1984-02-01 Canon Inc High voltage power supply device
JPS62260517A (en) * 1986-04-30 1987-11-12 メルラン、ジエラン Apparatus for tripping breaker
JPS6387573U (en) * 1986-11-27 1988-06-07
JPS6463876A (en) * 1987-09-03 1989-03-09 Ngk Insulators Ltd Electroscope apparatus
JPS6463875A (en) * 1987-09-03 1989-03-09 Ngk Insulators Ltd Electroscope apparatus
JPH0545570U (en) * 1991-11-19 1993-06-18 四国電力株式会社 measuring device
JPH08196033A (en) * 1994-04-15 1996-07-30 Chubu Electric Power Co Inc Method, device, and apparatus for orienting faulty section of transmission distribution line
JP2019158621A (en) * 2018-03-13 2019-09-19 パナソニックＩｐマネジメント株式会社 Harness for branch and measurement system

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