WO2010119353A1 - Electronic sensor for capturing voltage and current signals from a live wire - Google Patents

Electronic sensor for capturing voltage and current signals from a live wire Download PDF

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Publication number
WO2010119353A1
WO2010119353A1 PCT/IB2010/050658 IB2010050658W WO2010119353A1 WO 2010119353 A1 WO2010119353 A1 WO 2010119353A1 IB 2010050658 W IB2010050658 W IB 2010050658W WO 2010119353 A1 WO2010119353 A1 WO 2010119353A1
Authority
WO
WIPO (PCT)
Prior art keywords
electronic sensor
capturing
live wire
signals
capacitive
Prior art date
Application number
PCT/IB2010/050658
Other languages
French (fr)
Inventor
Debora Presotto
Original Assignee
Ims Industria De Micro Sistemas Eletronicos Ltda.
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 Ims Industria De Micro Sistemas Eletronicos Ltda. filed Critical Ims Industria De Micro Sistemas Eletronicos Ltda.
Publication of WO2010119353A1 publication Critical patent/WO2010119353A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/142—Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • G01R1/22—Tong testers acting as secondary windings of current transformers

Definitions

  • the present invention refers to an electronic sensor for capturing electric signals from a live wire.
  • the cables have a sheath and the sensors currently used, since they are resistive, make it necessary to splice the network cable to be able to capture the readings because it needs electrical contact for the signal to be received. As soon as the sheath losses its protective function, this lowers the useful life of the cable.
  • the objective of the present invention is to propose an electronic sensor for capturing electric signals that solves the existing problems in the current technique.
  • the electronic sensor in order to capture electric signals (1 ) presented here, has a coil (11 ) that is connected to the bus bar. This coil (11 ) is connected to a capacitive system (12) that stores the signals collected and transforms them into signals to a communication system with the operator.
  • Figure 1 represents a view in perspective where we can visualize the preferred incorporation of the electronic sensor (1 ) and locate the module for capturing the voltage signal made up of the capacitive system (12) and the current signal capturing module, the Rogowski coil (11 ).
  • the electronic sensor (1 ) has a voltage signal capturing module and modules for capturing other electric, physical, and/or chemical signals can be added.
  • a current signal capturing module was incorporated alongside the voltage signal capturing module.
  • the electronic sensor (1 ) of the present invention is connected to a live wire with handling rods or equivalent means.
  • Each electronic sensor (1 ) is placed on the live wire as follows: the electronic sensor (1 ) is positioned on the live wire in such a way that it stays hooked on the line by means of an insulating device, and then the electronic sensor (1 ) is adjusted (fastened) on the live wire by a fastening bolt or clamp, which will keep it from falling or sliding along the wire.
  • the capacitive system (12) there is the capacitive system (12), the Rogowski coil (11 ), a metal plate for voltage connection, interconnection cables, clamps, resins that work as shock absorbers to soften the impact if they are dropped and that have a high electric insulation quality, and the part injected in plastic with anti-flames and UV (if used outdoors and exposed to the weather).
  • the voltage signal capture module that exists on the electronic sensor (1 ) uses the capacitive principle using dielectrics compatible with the voltages of insulation necessary.
  • the voltage signal is captured from the capacitive system (12) by means of a capacitive divider using one vacuum capacitor and one capacitor for obtaining the signal with a voltage level enough to work on the input circuits of a power gauge and this way it can capture the voltage signal both on the bare or insulated conductor (cable).
  • the module for capturing the current signals existing on the electronic sensor (1 ) is of the open Rogowski coil type (11 ).
  • the current signal captured by the coil flows through the cable that produces a variable magnetic flow in time and is connected to the coils wrap producing a variation in the flow inducing on the coil an electromotive force and this way reaching the adequate current for the input circuits.
  • the captured electric signals are conditioned by the operational amplifiers, voltage converters, and frequency in order to send them to an energy measurer by an isolated system of data transmission, which in this case was adapted to fiber optic as a means of communication, but any other means can be used for acquiring readings.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Near-Field Transmission Systems (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

An electronic sensor for capturing electric signals such as voltage signals and current signals from a live wire is presented such that adequate safety is provided for the operator during installation and operation of the system. The electronic sensor (1 ) for capturing voltage and current signals from a live wire comprising a coil (11 ) for capturing the current signal and a capacitive system (12) for capturing the voltage signal wherein the coil (11 ) is connected to a bus bar linked to said capacitive system (12) and the capacitive system (12) is configured to store the captured signals and to communicate the collected signals to a communication system. In addition the coil (11 ) is of the Rogowski type and the capacitive system (12) may comprise a capacitive divider using one vacuum capacitor and one capacitor for obtaining the voltage signal. The electronic sensor (1 ) is being connected to the live wire with handling rods.

Description

ELECTRONIC SENSOR FOR CAPTURING VOLTAGE AND CURRENT SIGNALS FROM A LIVE WIRE
The present invention refers to an electronic sensor for capturing electric signals from a live wire.
Currently, the electronic sensors on the market that capture voltage have restrictions in capturing the voltage signal because they use the measurement between phase and ground by using a resistive circuit.
As for the voltage signal, since there is no electric isolation system adequate for allowing safety for the operator during installation and operation when carrying out this service, its measurement becomes very dangerous as this could cause an electric discharge and accidents.
Furthermore, the weight and volume of these sensors, due to the resistive circuit necessary to capture the signal, makes the method impractical in some situations due to the space available for installation. These sensors are installed on live wires having to consider ergonomic issues for the operator and in many cases there are compact lines where there is an impediment of volume because the spacing between the lines is much reduced.
On the compact lines, the cables have a sheath and the sensors currently used, since they are resistive, make it necessary to splice the network cable to be able to capture the readings because it needs electrical contact for the signal to be received. As soon as the sheath losses its protective function, this lowers the useful life of the cable.
The objective of the present invention is to propose an electronic sensor for capturing electric signals that solves the existing problems in the current technique. The electronic sensor, in order to capture electric signals (1 ) presented here, has a coil (11 ) that is connected to the bus bar. This coil (11 ) is connected to a capacitive system (12) that stores the signals collected and transforms them into signals to a communication system with the operator.
The invention along with its objectives and advantages can be better understood with the description of the preferred incorporations that follow the figures attached, where:
Figure 1 represents a view in perspective where we can visualize the preferred incorporation of the electronic sensor (1 ) and locate the module for capturing the voltage signal made up of the capacitive system (12) and the current signal capturing module, the Rogowski coil (11 ).
The electronic sensor (1 ) has a voltage signal capturing module and modules for capturing other electric, physical, and/or chemical signals can be added. In a preferred incorporation of the electronic sensor (1 ) represented here, a current signal capturing module was incorporated alongside the voltage signal capturing module.
The electronic sensor (1 ) of the present invention is connected to a live wire with handling rods or equivalent means. Each electronic sensor (1 ) is placed on the live wire as follows: the electronic sensor (1 ) is positioned on the live wire in such a way that it stays hooked on the line by means of an insulating device, and then the electronic sensor (1 ) is adjusted (fastened) on the live wire by a fastening bolt or clamp, which will keep it from falling or sliding along the wire.
In the preferred incorporation, as part of the electronic sensor (1 ), there is the capacitive system (12), the Rogowski coil (11 ), a metal plate for voltage connection, interconnection cables, clamps, resins that work as shock absorbers to soften the impact if they are dropped and that have a high electric insulation quality, and the part injected in plastic with anti-flames and UV (if used outdoors and exposed to the weather).
The voltage signal capture module that exists on the electronic sensor (1 ) uses the capacitive principle using dielectrics compatible with the voltages of insulation necessary.
The voltage signal is captured from the capacitive system (12) by means of a capacitive divider using one vacuum capacitor and one capacitor for obtaining the signal with a voltage level enough to work on the input circuits of a power gauge and this way it can capture the voltage signal both on the bare or insulated conductor (cable).
The module for capturing the current signals existing on the electronic sensor (1 ) is of the open Rogowski coil type (11 ). The current signal captured by the coil flows through the cable that produces a variable magnetic flow in time and is connected to the coils wrap producing a variation in the flow inducing on the coil an electromotive force and this way reaching the adequate current for the input circuits.
The captured electric signals are conditioned by the operational amplifiers, voltage converters, and frequency in order to send them to an energy measurer by an isolated system of data transmission, which in this case was adapted to fiber optic as a means of communication, but any other means can be used for acquiring readings.
It should be evident to those that know the technique that the present invention can be configured by many other specific forms without parting from the spirit or the invention's scope. It would be especially important to understand that the invention may be configured in the forms described.

Claims

1. "ELECTRONIC SENSOR FOR CAPTURING ELECTRIC SIGNAL", characterized by being made up of a coil (11 ) that is connected to a bus bar linked to a capacitive system (12), and then this is connected to a communication system.
2. "ELECTRONIC SENSOR FOR CAPTURING ELECTRIC SIGNAL", according to claim 1 , characterized by the coil being of the Rogowski type and capturing the current signal.
3. "ELECTRONIC SENSOR FOR CAPTURING ELECTRIC SIGNAL", according to claim 1 , characterized by the capacitive system having a capacitive divider using one vacuum capacitor and one capacitor for obtaining the signal.
4. "ELECTRONIC SENSOR FOR CAPTURING ELECTRIC SIGNAL", characterized by being connected to a live wire with handling rods or equivalent means.
PCT/IB2010/050658 2009-03-24 2010-02-12 Electronic sensor for capturing voltage and current signals from a live wire WO2010119353A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI0901121-8A BRPI0901121A2 (en) 2009-03-24 2009-03-24 electronic sensor for electrical signal capture
BRPI0901121-8 2009-03-24

Publications (1)

Publication Number Publication Date
WO2010119353A1 true WO2010119353A1 (en) 2010-10-21

Family

ID=42982156

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2010/050658 WO2010119353A1 (en) 2009-03-24 2010-02-12 Electronic sensor for capturing voltage and current signals from a live wire

Country Status (3)

Country Link
AR (1) AR075891A1 (en)
BR (1) BRPI0901121A2 (en)
WO (1) WO2010119353A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012156812A1 (en) * 2011-05-17 2012-11-22 Eaton Corporation Parasitic power supply and sensor apparatus including a power supply

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4611207A (en) * 1983-10-31 1986-09-09 Niagara Mohawk Power Corporation Apparatus for monitoring voltage on a high voltage overhead transmission line
DE3544508A1 (en) * 1985-12-17 1987-06-19 Ulrich Dipl Ing Adolph Combined transducer for measuring current and voltage simultaneously on pipe-sheathed conductors
US4758962A (en) * 1983-04-13 1988-07-19 Fernandes Roosevelt A Electrical power line and substation monitoring apparatus and systems
WO1996010189A1 (en) * 1994-09-29 1996-04-04 Pacific Gas And Electric Company Fault sensor device with radio transceiver
WO1999042844A1 (en) * 1998-02-23 1999-08-26 The University Of Sydney Power monitoring apparatus
WO2005119714A2 (en) * 2004-05-28 2005-12-15 Maxwell Technologies, Inc. Improved hv capacitor and testing method
WO2006007456A2 (en) * 2004-06-21 2006-01-19 Abb Technology Ag A method and an apparatus for measuring voltage at a power switching device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4758962A (en) * 1983-04-13 1988-07-19 Fernandes Roosevelt A Electrical power line and substation monitoring apparatus and systems
US4611207A (en) * 1983-10-31 1986-09-09 Niagara Mohawk Power Corporation Apparatus for monitoring voltage on a high voltage overhead transmission line
DE3544508A1 (en) * 1985-12-17 1987-06-19 Ulrich Dipl Ing Adolph Combined transducer for measuring current and voltage simultaneously on pipe-sheathed conductors
WO1996010189A1 (en) * 1994-09-29 1996-04-04 Pacific Gas And Electric Company Fault sensor device with radio transceiver
WO1999042844A1 (en) * 1998-02-23 1999-08-26 The University Of Sydney Power monitoring apparatus
WO2005119714A2 (en) * 2004-05-28 2005-12-15 Maxwell Technologies, Inc. Improved hv capacitor and testing method
WO2006007456A2 (en) * 2004-06-21 2006-01-19 Abb Technology Ag A method and an apparatus for measuring voltage at a power switching device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012156812A1 (en) * 2011-05-17 2012-11-22 Eaton Corporation Parasitic power supply and sensor apparatus including a power supply
US9088209B2 (en) 2011-05-17 2015-07-21 Eaton Corporation Parasitic power supply and sensor apparatus including a power supply

Also Published As

Publication number Publication date
AR075891A1 (en) 2011-05-04
BRPI0901121A2 (en) 2010-12-21

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