IT1258863B - Apparecchio di prova per l'indicazione di tensioni elettriche. - Google Patents

Apparecchio di prova per l'indicazione di tensioni elettriche.

Info

Publication number
IT1258863B
IT1258863B ITRM920728A ITRM920728A IT1258863B IT 1258863 B IT1258863 B IT 1258863B IT RM920728 A ITRM920728 A IT RM920728A IT RM920728 A ITRM920728 A IT RM920728A IT 1258863 B IT1258863 B IT 1258863B
Authority
IT
Italy
Prior art keywords
resistance
test apparatus
test
ground
voltage
Prior art date
Application number
ITRM920728A
Other languages
English (en)
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 filed Critical
Publication of ITRM920728A0 publication Critical patent/ITRM920728A0/it
Publication of ITRM920728A1 publication Critical patent/ITRM920728A1/it
Application granted granted Critical
Publication of IT1258863B publication Critical patent/IT1258863B/it

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/257—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques using analogue/digital converters of the type with comparison of different reference values with the value of voltage or current, e.g. using step-by-step method

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

Un apparecchio dì prova per il controllo unipolare di tensioni alternate presenta tra un elettrodo di prova (1) ed un elettrodo di massa (2) un circuito serie di una elevata resistenza ohmica addizionale (R1) e di una resistenza di misura (R2). L'elettrodo di massa (2) è accoppiato capacitativamente verso terra attraverso il corpo dell'utente. Il valore della resistenza addizionale (R1) è almeno 10 volte maggiore delle variazioni che si possono al massimo verificare nella reattanza capacitiva di accoppiamento (C1, C2) dell'utente verso terra, così che la resistenza totale complessa è pressoché costante. La caduta di tensione sulla resistenza di misura (R2) viene amplificata, raddrizzata e confrontata in un circuito comparatore con tensioni di riferimento prefissate, per pilotare una indicazione a fotodiodi (D2, D3, D4, D5) in maniera corrispondente alla tensione di misura. L'apparecchio di prova può anche essere destinato per un controllo della tensione senza stabilire un contatto ovvero essere adatto per prove di continuità.(FIG. 1)
ITRM920728A 1991-10-21 1992-10-07 Apparecchio di prova per l'indicazione di tensioni elettriche. IT1258863B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4134695A DE4134695A1 (de) 1991-10-21 1991-10-21 Pruefgeraet zur anzeige elektrischer spannung

Publications (3)

Publication Number Publication Date
ITRM920728A0 ITRM920728A0 (it) 1992-10-07
ITRM920728A1 ITRM920728A1 (it) 1994-04-07
IT1258863B true IT1258863B (it) 1996-03-01

Family

ID=6443080

Family Applications (1)

Application Number Title Priority Date Filing Date
ITRM920728A IT1258863B (it) 1991-10-21 1992-10-07 Apparecchio di prova per l'indicazione di tensioni elettriche.

Country Status (4)

Country Link
US (1) US5293113A (it)
DE (1) DE4134695A1 (it)
GB (1) GB2260822B (it)
IT (1) IT1258863B (it)

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US5973501A (en) * 1993-10-18 1999-10-26 Metropolitan Industries, Inc. Current and voltage probe for measuring harmonic distortion
US5892363A (en) * 1996-09-18 1999-04-06 Roman; Francisco Jose Electrostatic field measuring device based on properties of floating electrodes for detecting whether lightning is imminent
US5923130A (en) * 1996-10-31 1999-07-13 Roman; Francisco Repetitive and constant energy impulse current generator
US5939841A (en) * 1996-10-31 1999-08-17 Roman; Francisco Method and apparatus using a floating electrode to extract energy from an electric field
US5952931A (en) * 1997-01-07 1999-09-14 Seagate Technology, Inc. Checker box of wrist-strap monitoring
US5814948A (en) * 1997-01-14 1998-09-29 Eastman Kodak Company Flash circuit for low cost cameras
US6259243B1 (en) 1999-06-04 2001-07-10 Lynn C. Lundquist Method for electromagnetically shielding inductive voltage detectors
US6377054B1 (en) 1999-07-20 2002-04-23 Ch. Beha Gmbh Test device for electrical voltages with integrated illumination unit
DE10023048B4 (de) * 2000-05-11 2009-06-04 Ch. Beha Gmbh Technische Neuentwicklungen Wechselspannungsdedektor
US6459252B1 (en) 2001-01-18 2002-10-01 Walter S. Bierer AC phasing voltmeter
DE10326066A1 (de) * 2003-06-10 2005-01-05 Beha Innovation Gmbh Werkzeug mit Spannungserkennung
DE60315619T2 (de) * 2003-06-24 2008-06-05 Chauvin Arnoux Verfahren und Vorrichtung zur Erkennung der Drehrichtung zweier Phasen in einem Dreiphasenspannungssystem
US6998832B1 (en) * 2004-02-26 2006-02-14 Hd Electric Company High-voltage indicating apparatus and method
US7230411B2 (en) * 2004-12-28 2007-06-12 S&C Electric Co. Voltage sensing apparatus for medium-voltage electrical power distribution systems
US7282935B2 (en) * 2006-01-24 2007-10-16 Agilent Technologies, Inc. Regenerator probe
US8193802B2 (en) * 2008-04-09 2012-06-05 Milwaukee Electric Tool Corporation Slidably attachable non-contact voltage detector
US7893686B1 (en) * 2008-06-05 2011-02-22 Atherton John C Power cord voltage indicator
US8581609B2 (en) * 2009-06-03 2013-11-12 Fluke Corporation Shielded antenna for system test of a non-contact voltage detector
FR3028744A1 (fr) 2014-11-25 2016-05-27 Impeto Medical Dispositif de releve de donnees electrophysiologiques de fiabilite accrue
US10209339B1 (en) * 2015-07-22 2019-02-19 Verivolt Inc. Self-adjusting single contact voltage sensor
JP7172282B2 (ja) * 2018-08-24 2022-11-16 日本電信電話株式会社 コモンモード電圧測定装置およびコモンモード電圧測定方法
CN108872685B (zh) * 2018-09-28 2024-07-02 广东电网有限责任公司 电压测量笔
JP7071645B2 (ja) * 2019-01-15 2022-05-19 日本電信電話株式会社 容量性電圧測定装置
JP7328583B2 (ja) * 2020-01-30 2023-08-17 日本電信電話株式会社 対地電圧測定における測定個人差補正システム
JP7614535B2 (ja) * 2021-05-12 2025-01-16 日本電信電話株式会社 測定システムおよび変換係数取得装置
CN114217155B (zh) * 2021-12-14 2023-08-22 广东电网有限责任公司 一种配网环网箱中二次小室压板的状态检测电路和终端

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US3412392A (en) * 1965-04-07 1968-11-19 Gen Motors Corp Potential level indicating circuit
AT258411B (de) * 1965-09-17 1967-11-27 Micafil Ag Reflexarmer Spannungsteiler für hohe Stoß-Spannungen
US3786468A (en) * 1972-09-22 1974-01-15 M Moffitt Electric field proximity safety alarm
CA1145400A (en) * 1978-02-16 1983-04-26 Raymond A. Laperle Ground-isolated electrostatic field detector
US4205264A (en) * 1978-04-25 1980-05-27 Charles Gold High impedance electrical testing instrument for AC and DC voltage detection and continuity testing
US4189673A (en) * 1978-05-01 1980-02-19 Burroughs Corporation Pen-shaped precision multi-level current mode logic test probe
DE2830323A1 (de) * 1978-07-10 1980-01-24 Lauerer Friedrich Spannungsmesser bzw. -pruefer
DE2846675C3 (de) * 1978-10-26 1981-08-13 Siemens AG, 1000 Berlin und 8000 München Prüfeinrichtung zum Anzeigen einer elektrischen Spannung und gegebenenfalls deren Polarität
US4558309A (en) * 1983-06-27 1985-12-10 The Simco Company, Inc. Ground tether continuity monitor
US4859992A (en) * 1984-01-06 1989-08-22 Hoigaard Jan C Electrostatic system monitor and method therefor
DE3439504A1 (de) * 1984-10-11 1986-04-30 Hubertus 5948 Schmallenberg Schauerte Einpoliges elektrisches pruefgeraet
DE3505531A1 (de) * 1985-02-18 1986-08-21 Wolfgang Dipl.-Ing. 7500 Karlsruhe Schuster Elektronisches mehrzweckanzeigegeraet
US4758792A (en) * 1985-09-13 1988-07-19 Southwest Research Institute Method for utilizing a spherical dipole probe for detecting faults in high voltage transmission line insulators
US4785294A (en) * 1986-06-24 1988-11-15 Zero Corporation Static monitoring system
US5150038A (en) * 1988-09-27 1992-09-22 Hitachi Cable Limited System for detecting the extraordinary approach of objects having earth potential toward a power transmission line
US4916570A (en) * 1989-05-11 1990-04-10 Micron Technology, Inc. Voltage comparator circuit for monitoring a process output voltage within a preset range
US5105181A (en) * 1990-08-17 1992-04-14 Hydro-Quebec Method and electrical measuring apparatus for analyzing the impedance of the source of an actual alternating voltage

Also Published As

Publication number Publication date
ITRM920728A0 (it) 1992-10-07
ITRM920728A1 (it) 1994-04-07
US5293113A (en) 1994-03-08
GB2260822B (en) 1995-06-28
DE4134695A1 (de) 1993-04-22
GB2260822A (en) 1993-04-28
GB9221890D0 (en) 1992-12-02

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19961007