JPS55149856A - Voltage measuring device - Google Patents

Voltage measuring device

Info

Publication number
JPS55149856A
JPS55149856A JP4763979A JP4763979A JPS55149856A JP S55149856 A JPS55149856 A JP S55149856A JP 4763979 A JP4763979 A JP 4763979A JP 4763979 A JP4763979 A JP 4763979A JP S55149856 A JPS55149856 A JP S55149856A
Authority
JP
Japan
Prior art keywords
voltage
phase
conductor
insulating material
voltage conductor
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
JP4763979A
Other languages
Japanese (ja)
Other versions
JPS645259B2 (en
Inventor
Katamasa Harumoto
Hiroshi Yamamoto
Kotaro Hayashi
Yoshiaki Ida
Osayoshi Imamura
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.)
Kansai Electric Power Co Inc
Mitsubishi Electric Corp
Original Assignee
Kansai Electric Power Co Inc
Mitsubishi Electric Corp
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 Kansai Electric Power Co Inc, Mitsubishi Electric Corp filed Critical Kansai Electric Power Co Inc
Priority to JP4763979A priority Critical patent/JPS55149856A/en
Publication of JPS55149856A publication Critical patent/JPS55149856A/en
Publication of JPS645259B2 publication Critical patent/JPS645259B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE: To accurately measure a voltage of a high-voltage conductor only, by inserting an insulating material, the permittivity of which is higher than that of a surrounding insulating medium, between a high-voltage conductor of each phase and an electrostatic coupling electrode being opposed each other, to carry out phase devision.
CONSTITUTION: Three-phase high-voltage conductors 3, 4, 5 are housed in a sealed metal container 1 in a three-phase combined type SF6 gas insulating electric machine. Taking an electrostatic coupling electrode 9 as an example, a specific permittivity of an insulating material 6 inserted between the electrode 9 and the U-phase high-voltage conductor 3 can be increased nearly ten times that of an SF6 gas 2 if the insulating material 6 is made of a mixture consisting of a substance of a high specific permittivity, such as strontium titanate added to epoxy resin. Accordingly, the influence of electrostatic induction from high-voltage conductors of phases other than U-phase can be ignored. Therefore, when a voltage obtained by the voltage division of a capacitance between the high-voltage conductor 3 and the electrostatic coupling electrode 9 and a capacitance of a capacitor 12 is amplified by a high input impedance amplifier 15, a voltage of the high-voltage conductor 3 can be displayed on a meter 18. The same applies to the high-voltage conductors of V-phase and W-phase.
COPYRIGHT: (C)1980,JPO&Japio
JP4763979A 1979-04-18 1979-04-18 Voltage measuring device Granted JPS55149856A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4763979A JPS55149856A (en) 1979-04-18 1979-04-18 Voltage measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4763979A JPS55149856A (en) 1979-04-18 1979-04-18 Voltage measuring device

Publications (2)

Publication Number Publication Date
JPS55149856A true JPS55149856A (en) 1980-11-21
JPS645259B2 JPS645259B2 (en) 1989-01-30

Family

ID=12780801

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4763979A Granted JPS55149856A (en) 1979-04-18 1979-04-18 Voltage measuring device

Country Status (1)

Country Link
JP (1) JPS55149856A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015219235A (en) * 2014-05-13 2015-12-07 ゼネラル・エレクトリック・カンパニイ Calibration methods for voltage sensing devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015219235A (en) * 2014-05-13 2015-12-07 ゼネラル・エレクトリック・カンパニイ Calibration methods for voltage sensing devices

Also Published As

Publication number Publication date
JPS645259B2 (en) 1989-01-30

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