JPS55143446A - Measuring instrument for difference in potential - Google Patents

Measuring instrument for difference in potential

Info

Publication number
JPS55143446A
JPS55143446A JP8860278A JP8860278A JPS55143446A JP S55143446 A JPS55143446 A JP S55143446A JP 8860278 A JP8860278 A JP 8860278A JP 8860278 A JP8860278 A JP 8860278A JP S55143446 A JPS55143446 A JP S55143446A
Authority
JP
Japan
Prior art keywords
amplifier
electrode
potential
indicator
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
JP8860278A
Other languages
Japanese (ja)
Inventor
Osayoshi Imamura
Yoshiaki Ida
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.)
Mitsubishi Electric Corp
Original Assignee
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8860278A priority Critical patent/JPS55143446A/en
Publication of JPS55143446A publication Critical patent/JPS55143446A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE: To measure the potential of a conductor part covered with an insulator without damaging a commodity, by using an electrode which couples electrostatically without touching.
CONSTITUTION: A voltage divided by the electrostatic capacity between electrode 4 and the conductor part of insulating electric wire 3 and the input impedance of amplifier 7 is input to amplifier 7 and the output of impedance conversion is displayed by indicator 8. At the time, if electrode 4 is constant in mechanical structure, the electrostatic capacity is constant and the input impedance of amplifier 7 is unchangeable. For the purpose, the voltage-dividing ratio is previously calibrated to make it possible to read direct a voltage value on indicator 8.
COPYRIGHT: (C)1980,JPO&Japio
JP8860278A 1978-07-19 1978-07-19 Measuring instrument for difference in potential Pending JPS55143446A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8860278A JPS55143446A (en) 1978-07-19 1978-07-19 Measuring instrument for difference in potential

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8860278A JPS55143446A (en) 1978-07-19 1978-07-19 Measuring instrument for difference in potential

Publications (1)

Publication Number Publication Date
JPS55143446A true JPS55143446A (en) 1980-11-08

Family

ID=13947367

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8860278A Pending JPS55143446A (en) 1978-07-19 1978-07-19 Measuring instrument for difference in potential

Country Status (1)

Country Link
JP (1) JPS55143446A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188172U (en) * 1981-05-25 1982-11-29

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188172U (en) * 1981-05-25 1982-11-29

Similar Documents

Publication Publication Date Title
KR920015182A (en) Battery electric energy charge status monitor device for personal computer
EP0570148A3 (en) Electrostatic voltmeter employing high voltage integrated circuit devices
SE8503880L (en) DEVICE FOR DETERMINING ROOM INHOMOGENITIES IN A DIELECTRIC
JPS55143446A (en) Measuring instrument for difference in potential
JPS55146059A (en) Measuring method of dielectric constant and its unit
JPS5368290A (en) Insulation resistance measuring apparatus of ground system
JPS5248376A (en) High input impedance probe
JPS5570748A (en) Voltage measuring unit of operation compensation type
SU111068A1 (en) Device for measuring electrical energy loss in a corona in a loaded high-voltage power line
US2582163A (en) Electrometer for pocket chambers
KR850700072A (en) Method and apparatus for angle detection and calculation of large rotating alternator under load
JPS5229777A (en) Small-size measuring instrument
JPS5313967A (en) Measuring method for characteristic of vibration gauge
JPS55144556A (en) Surface potentiometer
JPS5554453A (en) High-tension measurement system
JPS56160611A (en) Analog quantity indicator
JPS568506A (en) Slope sensor
JPS53138377A (en) Insulation testing method
SU426337A1 (en) DEVICE FOR RESEARCH OF CROWN DISCHARGE
JPS5658666A (en) Avometer having impedance range
SU607119A1 (en) External dynamic load measuring device
JPS5833577Y2 (en) surface charge meter
GB1198147A (en) Capacitive Probe
JPS54121777A (en) Current applying voltage measuring circuit
JPS5288728A (en) Condenser-type voltage transformer