WO2014078892A1 - Dispositif et ensemble de test pour tester l'intégrité d'un réseau électrique à basse tension - Google Patents

Dispositif et ensemble de test pour tester l'intégrité d'un réseau électrique à basse tension Download PDF

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Publication number
WO2014078892A1
WO2014078892A1 PCT/AU2013/001335 AU2013001335W WO2014078892A1 WO 2014078892 A1 WO2014078892 A1 WO 2014078892A1 AU 2013001335 W AU2013001335 W AU 2013001335W WO 2014078892 A1 WO2014078892 A1 WO 2014078892A1
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WO
WIPO (PCT)
Prior art keywords
electrical network
housing
terminals
voltage
test
Prior art date
Application number
PCT/AU2013/001335
Other languages
English (en)
Inventor
Daniel INDYK
Original Assignee
Indyk Daniel
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
Priority claimed from AU2012905062A external-priority patent/AU2012905062A0/en
Application filed by Indyk Daniel filed Critical Indyk Daniel
Publication of WO2014078892A1 publication Critical patent/WO2014078892A1/fr

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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
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/155—Indicating the presence of voltage
    • 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
    • G01R1/02—General constructional details
    • G01R1/06—Measuring leads; Measuring probes
    • G01R1/067—Measuring probes
    • G01R1/06788—Hand-held or hand-manipulated probes, e.g. for oscilloscopes or for portable test instruments
    • 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
    • G01R1/36—Overload-protection arrangements or circuits for electric measuring instruments
    • 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
    • G01R15/12—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/18—Indicating phase sequence; Indicating synchronism
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections

Definitions

  • the present invention relates to test devices and in particular to a device and a test assembly for testing the integrity of a low voltage electrical network.
  • test-lamps The integrity of an electrical network, in particular, the active and neutral connections of an electrical supply to an electrical installation, is typically tested using conventional test-lamps to provide a visual indication of whether the electrical supply to the electrical installation is live by virtue of the test-lamps emitting a glow in use. Test-lamps can be easily viewed for glow in any orientation and do not have to be seated on a firm base to be used and read.
  • test-lamps can correctly identify the phase and neutral lines which are to be connected to the installation by using an independent earth connection as the reference, and can differentiate between phase to phase voltages on three phase connections (nominally 415 VAC) showing full glow' and phase to neutral connections (nominally 230-240 VAC) showing 'half glow', such test-lamps are unable to provide an accurate measurement of the voltage level being supplied to the electrical installation.
  • Digital multimeters on the other hand are digital measuring devices that can provide more accurate voltage readings.
  • the operator must be able to focus squarely on the display. This is something that is often difficult to do whilst concentrating on holding the test probes of the multimeter onto points of measurement.
  • reading of the digital multimeter display is oftentimes hindered due to the display being small and poorly illuminated, thereby making voltage readings difficult to see, particularly in situations where the operator is required to test an electrical network or installation in a dimly lit or brightly lit environment, or more importantly, when the digital multimeter is not placed in a stable position where the display can be seen clearly.
  • the present Invention seeks to provide a device and a test assembly for testing the integrity of a low voltage electrical network, which will overcome or substantially ameliorate at least some of the deficiencies of the prior art, or to at least provide an alternative.
  • a device for testing the integrity of a low voltage electrical network comprising:
  • an indicating means operably connected to the at least two terminals and adapted for indicating the presence of voltage between the at least two terminals;
  • a measuring means operably connected to the at least two terminals and configured for measuring the level of voltage between the at least two terminals.
  • the indicating means and the measuring means being provided in the one device affords operators with a positive indication of the integrity of the electrical network by virtue of the indicating means, and an accurate reading of the voltage level by virtue of the measuring means.
  • the indicating means provides operators with a positive indication of the integrity of the electrical network without having to rely on the measuring means. This is beneficial in dimly lit or brightly lit environments, or awkward positions, whereby a clear view of a display of the measuring means may be impaired.
  • the measuring means provides operators with an accurate reading of the voltage level at the testing point. This is of specific benefit in order to measure voltage levels on a neutral line as the voltage level on the neutral line, on load, is a direct indication of neutral line integrity.
  • the indicating means and the measuring means being provided in the one device as opposed to two separate devices reduces the number of devices an operator is required to use, thereby making testing of the electrical network both safer and more efficient and reduces operator training time.
  • the indicating means comprises an input impedance for generating an electrical load to be applied to the electrical network to reduce the likelihood of an induced voltage being measured by the measuring means in use.
  • the likelihood of a false positive or transient reading indicative of an induced voltage being displayed on a display of the measuring means is reduced by virtue of the low input impedance of the indicating means.
  • the measuring means is operably connected in parallel to the indicating means.
  • the electrical network is a three-phase electrical network
  • the device further comprising phase rotation indicating means for operably connecting to the at least two terminals for indicating the phase rotation sequence of the three-phase electrical network.
  • the device is configured for testing the phase rotation sequence of a three-phase electrical network to ensure that the electrical supply to the electrical installation is in the correct phase sequence.
  • phase rotation Indicating means is operably connected in parallel to the indicating means.
  • the at least two terminals comprise* three terminals for operably connecting to the three-phase electrical network.
  • the device further comprises a housing, wherein the indicating means and the measuring means are at least partially located within the housing.
  • the housing is electrically Insulated.
  • the operator can test the integrity of the electrical network with a 1 reduced risk of electrocution occurring in use.
  • the indicating means comprises at least one illuminating device.
  • operators have an immediate visual indication of the integrity of the electrical network by virtue of the at least one illuminating device.
  • the at least one illuminating device is an incandescent lamp.
  • the illuminating device comprising at least one incandescent lamp ensures good visibility.
  • the illuminating device comprising at least one incandescent lamp ensures an intense light source.
  • the illuminating device comprising at least one incandescent lamp ensures relatively low load impedance.
  • the device further comprises an elongate housing, wherein the at least one illuminating device comprises first and second illuminating devices located at opposing ends of the elongate housing.
  • the device further comprises an elongate housing having opposing ends, wherein at least one of the opposing ends of the housing is adapted to releasably receive the at least one illuminating device.
  • the measuring means Is located substantially between the opposing ends of the elongate housing.
  • the first and second illuminating devices are connected in series.
  • the first and second illuminating devices emit light of the same colour.
  • the device is adapted to measure voltage in the range of between 0 V and 500 VAC.
  • the device can be used to test the integrity of an electrical network that carries voltages up to 500 VAC.
  • the device is adapted to measure voltage in the range of between 0 VAC and 480 VAC.
  • the device can be used to test the integrity of a low voltage electrical network that carries voltages up to 500 VAC.
  • the measuring means comprises a measuring device and a power source for providing power to the measuring device in use.
  • the power source is a DC power source.
  • the power source being a DC power source ensures that the device is portable.
  • the DC power source comprises at least one battery.
  • the use of at least one battery ensures that the device is portable.
  • the at least one battery is rechargeable.
  • the at least one battery being rechargeable reduces the cost and inconvenience associated with the need to constantly replace non-rechargeable batteries each time.
  • the device further comprises a housing, the measuring device and the power source being located at least partially within the housing.
  • the measuring means further comprises an ON/OFF switch.
  • the display device can be switched ON and OFF as required by virtue of the ON/OFF switch.
  • the indicating means is adapted to emit an audible warning.
  • operators have an immediate audible indication of the mains voltage present on the electrical network by virtue of the audible warning.
  • the device further comprises test leads operably connected to the at least two terminals in use.
  • At least one of the test leads is fused.
  • the at least one test lead being fused reduces the risk of the operator being injured as a result of a fault occurring in the instrument when testing the electrical network.
  • At least one of the test leads is electrically insulated.
  • the device further comprises carrying means.
  • the device is readily transportable in use.
  • the device further comprises a housing, the carrying means being attached to the housing.
  • test assembly for testing the integrity of a low voltage electrical network, the test assembly comprising:
  • applying a capacitor between the at least two terminals of the device provides a capacitive (reactive) load that can be on permanently without overheating or generating heat or wind, thus enabling the test assembly to be used for testing the integrity of the neutral connection of the electrical network.
  • the at least one capacitor comprises at least two capacitors connected in parallel.
  • the test assembly further comprises at least one anti-surge resistor operably connected between the at least two terminals of the device, the at least one anti-surge resistor being configured to prevent a current surge in the electrical network in use.
  • the risk of the device becoming damaged as a result of a current surge in the electrical network is reduced by virtue of the anti-surge resistor.
  • the at least one anti-surge resistor is a thermistor.
  • the test assembly further comprises a module configured for operably connecting to the housing, the module comprising the at least one capacitor.
  • the module can be operably connected to the device for the purposes of applying a capacitive (reactive) load to the electrical network when testing the integrity of the neutral connection of the electrical network in use.
  • Fig. 1 is a front view of a device for testing the integrity of a low voltage electrical network in accordance with a preferred embodiment of the present invention
  • Fig. 2 is a rear view of the device of Fig. 1 ;
  • Fig. 3 is a side view of the device of Figs. 1 and 2;
  • Fig. 4 shows (i) a circuit diagram for the device of Figs. 1 to 3, and (li) a circuit diagram for the device of Figs. 1 to 3 to enable the device to ascertain the phase rotation of a three-phase electrical network;
  • Fig. 5 shows a simplified circuit diagram for a capacitive load module configured for operably connecting to a low voltage supply
  • Fig. 6 shows a front view of a device for testing the integrity of a low voltage electrical network in accordance with another preferred embodiment of the present invention.
  • Figs. 1 to 3 show a device 10 for testing the integrity of a low voltage electrical network according to a preferred embodiment of the present invention.
  • the device 10 finds application in the testing of phase voltage levels, the neutral integrity of supply connections from, for example, an electrical substation to an electrical installation, and the direction of the phase rotation In three phase electrical installations.
  • the device 10 comprises a generally rectangular shaped housing 20 having opposing top and bottom walls 21 and 22, opposing front and rear walls 23 and 24, and opposing side walls 25 and 26.
  • the housing 20 comprises an internal cavity (not shown) configured for receiving the electrical components of the device 10.
  • Extending outwardly from each of the two opposing side walls 25 and 26 of the housing 20 is a generally cylindrical portion 25A and 26A, respectively.
  • Each of the two cylindrical portions 25A and 26A comprises an aperture (not shown) substantially therethrough that extends into the internal cavity of the housing 20.
  • each of the two cylindrical portions 25A and 26A mounted to each of the two cylindrical portions 25A and 26A is an open-ended cylindrical tube 35 and 36, respectively.
  • the housing 20 and the two cylindrical portions 25A and 26A define the midportion of the device 10 and the two cylindrical tubes 35 and 36 define the first and second end portions of the device 10.
  • the two cylindrical tubes 35 and 36 are each manufactured from a robust material that is generally translucent or transparent to allow light to be visible therethrough.
  • the cylindrical tubes 35 and 36 are manufactured from a mid- to high-density polymer such as, for example, polypropylene (PP) or polyethylene (PE).
  • PP polypropylene
  • PE polyethylene
  • the housing 20 is manufactured from a robust material such as mid-to high-density polypropylene (PP) or polyethylene (PE).
  • PP mid-to high-density polypropylene
  • PE polyethylene
  • the device 10 further comprises indicating means in the form of two illuminating devices 45 and 46.
  • the aperture in each of the two cylindrical portion 25A and 26A of the housing 20 is adapted to receive the corresponding illuminating device 45 and 46 according to the type of fitting used, namely, either a threaded or bayonet type fitting.
  • Each illuminating device 45 and 46 is thus mounted within the corresponding aperture such that at least a bulb portion of the illuminating device 45 and 46 extends outwardly from the corresponding cylindrical portion 25A and 26A and is surrounded by the corresponding translucent or transparent tube 35 and 36. In this arrangement, light emitted from the illuminating device 45 and 46 in use is visible through the corresponding translucent or transparent tube 35 and 36.
  • the two illuminating devices 45 and 46 are low wattage incandescent lamps configured to emit light of the same colour. Incandescent lamps are typically employed for their efficient light generation, intensity, which varies smoothly as a function of applied voltage, and relatively low loading impedance. The low input impedance of the electrical load afforded by the two illuminating devices 45 and 46 is sufficient to reduce the occurrence of a false positive reading of the live AC voltage in the electrical network in use.
  • the device 10 further comprises a measuring means in the form of a digital voltmeter 50 comprising conventional electronic circuitry configured to measure the AC voltage in the electrical network, and to convert the received analog signal, by referencing against an Internally generated reference, using an analog-to-digital converter (ADC) (not shown).
  • ADC analog-to-digital converter
  • the output signal of the ADC is then decoded using a decoder (not shown) and the resulting data transmitted to an LCD display panel 55 to provide a digital readout of the measured AC voltage.
  • the digital voltmeter 50 comprises a 0.1 microfarad blocking capacitor 57 to prevent any DC voltage influencing the desired AC voltage measurement.
  • the digital voltmeter 50 is mounted within the internal cavity of the housing 20 with the LCD display panel 55 being located at the front wall 23 of the housing 20 such that the LCD display panel 55 is clearly visible to an operator using the device 10.
  • Mounted in the bottom wall 22 of the housing 20 is an input means in the form of a slide switch 58.
  • the device 10 further comprises carrying means in the form of a handle 80 attached to the top wall 21 of the housing 20.
  • the housing 20 comprises a bay (shown in dashed outline) within the internal cavity of the housing 20, which is configured to house a DC power source therein for providing power to the digital voltmeter 50.
  • the DC power source is provided in the form of a dry cell battery 60 (see Fig. 4 (i)) operably mounted within the bay of the housing 20.
  • Access to the battery bay is provided by virtue of a bay door 65 located in the rear wall 24 of the housing 20.
  • the bay door 65 in this embodiment comprises a lock (not shown) which requires a corresponding tool (not shown) to open it.
  • the battery 60 is a 9 volt battery, which is ideally rechargeable to reduce the cost and inconvenience associated with non-rechargeable batteries.
  • test leads 80 and 90 are provided in the form of flexible electrically insulated cables 85 and 95, respectively, which are configured for operably connecting to a corresponding terminal 100 and 110 (see the circuit diagram in Fig. 4 (i)) as part of the electronic circuitry located within the internal cavity of the housing 20.
  • Each of the test leads 80 and 90 is equipped with a corresponding probe 87 and 97 at a terminal end thereof for applying to a corresponding test point of the electrical network in use.
  • Located at an end distal to the probe 87 and 97 is a corresponding plug (not shown) for operably connecting to a corresponding one of the two terminals 100 and 110 by virtue of sockets 27 and 28, respectively, which are operably connected to the corresponding terminal 100 and 110.
  • the two sockets 27 and 28 are located in a corresponding one of the two cylindrical portions 25A and 26A of the housing 20.
  • At least the first test lead 80 comprises an in-line fuse 120 to reduce the risk of a short circuit causing a dangerous condition occurring when testing the integrity of the electrical network in use.
  • the device 10 comprises another indicating means in the form of an audio device 70, which is mounted within the rear wall 24 of the housing 20.
  • the audio device 70 is operably connected to the test leads 80 and 90 for relaying an audible warning in response to a mains (AC) voltage being present. Operators will thus have an immediate audible Indication of mains (AC) voltage present on the electrical supply to the electrical installation by virtue of the sound emitted from the audio device 70.
  • the circuit shows the two terminals 100 and 1 10, and the two illuminating devices 45 and 46, which are connected In series between the two terminals 100 and 110.
  • the digital voltmeter 50 is operably connected in parallel to the two illuminating devices 45 and 46.
  • the slide switch 58 is operably connected in series with the battery 60 and the digital voltmeter 50 and Is adapted to transition between an ON position, in which the digital voltmeter 50 is operably connected with the battery 60, and an OFF position in which the digital voltmeter 50 is isolated from the battery 60.
  • the digital voltmeter 50 further comprises an auto-off function (not shown) to automatically trigger the LCD display panel 55 to turn off after a predetermined time to conserve the battery 60.
  • the device 10 further comprises phase rotation indicating means to enable the device 10 to be used to test the phase rotation sequence of a three-phase electrical network.
  • the circuitry 200 (shown in dashed outline) required to achieve the phase rotation testing is located within the internal cavity of the housing 20 of the device 0.
  • the phase rotation circuitry 200 utilises the two existing terminals 100 and 10 of the circuitry of the device 10 and works in combination with a third terminal 210 to enable testing of the three-phase electrical network.
  • each of the two terminals 100 and 110 is connected in series to first and second resistors 220A and 220B, and 230A and 230B, respectively. Connected in parallel across each of the two second resistors 220B and 230B is provided in the form of a corresponding illuminating device 240 and 250.
  • the two additional illuminating devices 240 and 250 are neon lamps. However, it will be appreciated that other types of lamp may equally be applied In the phase rotation circuitry 200.
  • the third terminal 210 comprises a condenser 260.
  • the housing 20 comprises a socket 130 in the bottom wall 22, which Is operably connected to the third terminal 210.
  • the socket 130 is configured for receiving a third test lead (not shown), which is provided in the form of a flexible electrically insulated cable equipped with a probe at a terminal end thereof for applying to a corresponding test point of the three-phase electrical network in use.
  • a plug Located at an end distal to the probe is a plug (not shown) for operably connecting the third test lead to the corresponding third terminal 210 (see the circuit diagrams in Fig. 4 (i) and in Fig. 4 (ii)) by virtue of the socket 130.
  • each of the two additional illuminating devices 240 and 250 is located at the bottom wall 22 of the housing 20 generally adjacent to the third socket 130.
  • the two additional illuminating devices 240 and 250 are each configured to emit light of a different colour i.e. red and green to give a clear indication as to whether the phase rotation sequence of the three-phase electrical network is positive (red) or negative (green) according to which illuminating device 240 and 250 is lit.
  • the device 10 further comprises capacitive load means for applying a capacitive (reactive) load to the electrical network when testing the integrity of the neutral connections of the network.
  • the capacitive load means is provided in the form of a capacitive load module (not shown), which is configured to operably connect with the housing 20 of the device 10 via connecting means such as, for example, crocodile clips (not shown) so that the capacitive load circuitry 300 within the capacitive load module is operably connected to the two terminals 100 and 110 of the existing circuitry of the device 10.
  • the capacitive load circuitry 300 comprises an anti-surge resistor 310 connected in series with the terminal 100.
  • the anti-surge resistor 310 is provided in the form of a thermistor, which is included to prevent a high in-rush current to the capacitive load. As the load current passes through the thermistor, the thermistor heats up and thus lowers in resistance thus allowing the capacitive load to draw the rated load current.
  • the capacitive load circuitry 300 further comprises two capacitors 320 and 330 connected in parallel to each other across the two terminals 100 andl 10.
  • the capacitive load circuitry 300 further comprises an indicator such as, for example, a neon lamp (not shown) for indicating that the mains supply is ON and a mains (AC) voltage is thus present.
  • the device 10 is configured to measure AC voltage levels typically in the range of between 0 VAC and 500 VAC, more preferably in the range between 0 VAC and 480 VAC. It will be understood by persons skilled In the art that the device 10 is immune to any DC voltage components by virtue of the blocking capacitor 57.
  • the Multiple Earthed Neutral link is removed, and then the capacitive load module is operably connected between the active and neutral conductors of the mains supply lines so as to apply an electrical load to the network. Illumination of the neon lamp of the capacitive load module on the electrical load indicates that mains (AC) voltage is present.
  • the device 10 is then placed in clear view, and the probe 87 of the first test lead 80 is held against the neutral conductor of the electrical network being tested, and the probe 97 of the other test lead 90 is placed against an independent earth point. This can be a remote earth stake or the existing earthing rod.
  • the neutral voltage measured and indicated on the LCD display panel 55 is a measure of the integrity of the neutral line.
  • the digital voltmeter 50 is turned on using the ON/OFF slide switch 58 and an accurate reading of the AC voltage level Is displayed on the LCD display panel 55.
  • the probe 87 of the first test lead 80 is held against an independent earth point. This can be a conductive stake in the ground, and the probe 97 of the other test lead 90 is placed against one of the active and neutral conductors of the mains supply lines. . If the two illuminating devices 45 and 46 light up (to half glow) this indicates that the active line has been identified. If no glow is apparent then the neutral has been identified, that is unless the neutral is disconnected. A third test is then done to ensure half glow between the active and neutral conductors is present. This ensures that the neutral is a conductive path back to the electrical substation rather than just being dead or disconnected. The use of the digital voltmeter 50 ensures that an accurate reading of the AC voltages of both active and neutral lines can be measured and displayed on the LCD display panel 55.
  • phase rotation test to ensure that the electrical supply to an electrical installation having, for example, a three-phase motor configured to rotate in a specific direction, is in the correct phase sequence
  • the probe 87 of the first test lead 80 is held against an active test point of the three-phase electrical network being tested, and the probe 97 of the other test lead 90 is placed against a second active test point of the three-phase electrical network,
  • the probe of the third test lead is then held against a third active test point of the three-phase electrical network.
  • the correct phase rotation sequence of the supply is confirmed by virtue of a corresponding one of the two additional illuminating devices 240 and 250 being lit to signify either a positive (red) or negative (green) voltage reading.
  • the digital voltmeter 50 is switched on using the ON/OFF slide switch 58 to measure and display the AC voltage level on the LCD display panel 55.
  • Fig. 6 shows a device 400 for testing the integrity of an electrical network according to another preferred embodiment of the present invention.
  • the device 400 is very similar to the device 10 described above, however
  • the housing 420 comprises a wall 421 that defines a generally cylindrical shape, being of a similar diameter to that of two transparent or translucent cylindrical tubes 435 and 436 mounted to opposing ends 425 and 426, respectively, of the housing 420.
  • Each of the two cylindrical tubes 435 and 436 houses a corresponding one of the two illuminating devices 45 and 46.
  • the two test leads 80 and 90 are operably connected to the corresponding terminal 100 and 110 via sockets 427 and 428, respectively, located at the wall 421 of the housing 420 itself as opposed to sockets located at the generally cylindrical portions 425A and 426A extending outwardly from the corresponding side walls 425 and 426 of the housing 420.
  • the second test lead 90 comprises an in-line fuse 120A.
  • the device 400 further comprises a measuring means in the form of a digital voltmeter 450 comprising an LCD display panel 455.
  • the digital voltmeter 450 is mounted within the internal cavity of the housing 420 with the LCD display panel 455 being located at the wall 421 of the housing 420 such that the LCD display panel 455 is clearly visible to an operator using the device 400.
  • the device 10 comprising both a visual Indicating means in the form of illuminating devices 45 and 46 and a measuring means in the form of a digital voltmeter 50 comprising an LCD display panel 55 affords operators with several benefits when undertaking the testing of connections to low voltage electricity networks and other routine low voltage tests.
  • the two illuminating devices 45 and 46 of the device 10 provide operators with an immediate positive Indication of the active supply connections in an electrical network by virtue of their highly visible incandescent glow, without having to revert to the LCD display panel 50.
  • the use of the two illuminating devices 45 and 46 is therefore beneficial in dimly lit environments such as at night, in which it may be difficult to view the reading on the LCD display panel 50, particularly if the LCD display panel 50 is poorly backlit.
  • the device 10 described here does not have to be placed on a stable base in order to obtain an indication of the AC voltage in the electrical network.
  • the digital voltmeter 50 provides operators with an accurate reading of the AC voltage level within the electrical network.
  • the two illuminating devices 45 and 46 and the digital voltmeter 50 being provided in the one device 10 reduces the need for operators to carry two separate devices.
  • the overall portability and ease of use of the device 10 in the field ensures that testing of the electncal network is both safer and more efficient. This is particularly relevant In situations in which operators such as linesmen are required to stand on a ladder in order to reach the overhead power lines to be tested.
  • the likelihood of obtaining a false positive or transient reading of the AC voltage in the electrical network using the device 10 is reduced by virtue of the low input impedance of the two illuminating devices 45 and 46, which provide an electrical load that is sufficient to dampen down any potential induced voltage being displayed on the LCD display panel 55.
  • a major benefit of the device 10 is that it will give an accurate reading of the live AC voltage in the electrical network such that the operator will know exactly what voltage corresponds to the strength of the glow emitted by the two illuminating devices 45 and 46 under those particular ambient lighting conditions. Hence, the operator can visually see the glow emitted by the two illuminating devices 45 and 46, and then by obtaining an accurate reading of the AC voltage level using the digital voltmeter 50, the operator can equate the AC voltage level to the strength of the observed glow to be used in subsequent testing of the same electrical network under those conditions. As such, the operator need only look for a similar strength of lamp glow and will be able to ascertain if the AC voltage in the electrical network is correct or not relative to the first test.
  • the tubes 35 and 36 are not limited to being manufactured from mid- to high-density PP or PE as described above, but may be manufactured from another type of translucent or transparent polymer such as, for example, polymethyl methacrylate (PMMA), polycarbonate (PC), or the like.
  • PMMA polymethyl methacrylate
  • PC polycarbonate
  • the tubes 35 and 36 are not limited to being manufactured from a polymer as described above, but may be manufactured from another robust yet transparent or translucent material such as, for example, a toughened glass.
  • the device 10 may be configured to measure AC voltage levels in the range of , between 0 VAC and 1000 VAC, as required. It will be appreciated that the choice of electronic components in this case, including illuminating devices, resistors, condensers, and anti-surge resistors, and the like, will depend on the range of voltage tested.
  • the device 10 may be configured to use an analogue moving coil meter (not shown) in place of the digital voltmeter 50.
  • analogue moving coil meter not shown
  • a bridge rectifier not shown
  • suitable series resistors not shown

Abstract

L'invention concerne un dispositif (10) destiné à tester l'intégrité d'un réseau électrique à basse tension, le dispositif (10) comportant au moins deux bornes (100 et 110) destinées à être reliées fonctionnellement au réseau électrique; un moyen d'indication relié fonctionnellement auxdites au moins deux bornes (100 et 110) et prévu pour indiquer la présence d'une tension entre lesdites au moins deux bornes (100 et 110); et un moyen de mesure relié fonctionnellement auxdites au moins deux bornes (100 et 110) et configuré pour mesurer le niveau de tension entre lesdites au moins deux bornes (100 et 110).
PCT/AU2013/001335 2012-11-21 2013-11-21 Dispositif et ensemble de test pour tester l'intégrité d'un réseau électrique à basse tension WO2014078892A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2012905062 2012-11-21
AU2012905062A AU2012905062A0 (en) 2012-11-21 A device and a test assembly for testing the integrity of a low voltage electrical network

Publications (1)

Publication Number Publication Date
WO2014078892A1 true WO2014078892A1 (fr) 2014-05-30

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PCT/AU2013/001335 WO2014078892A1 (fr) 2012-11-21 2013-11-21 Dispositif et ensemble de test pour tester l'intégrité d'un réseau électrique à basse tension

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WO (1) WO2014078892A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
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US9970965B2 (en) 2015-10-23 2018-05-15 Lisle Corporation Direct current digital voltage display and polarity circuit tester
US11667606B2 (en) 2019-03-01 2023-06-06 Autobahn Therapeutics, Inc. Thyromimetics
US11827596B2 (en) 2018-12-12 2023-11-28 Autobahn Therapeutics, Inc. Thyromimetics

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US7194362B2 (en) * 2004-03-22 2007-03-20 Yazaki Corporation Switching circuit and individual voltmeter apparatus
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9970965B2 (en) 2015-10-23 2018-05-15 Lisle Corporation Direct current digital voltage display and polarity circuit tester
US11827596B2 (en) 2018-12-12 2023-11-28 Autobahn Therapeutics, Inc. Thyromimetics
US11667606B2 (en) 2019-03-01 2023-06-06 Autobahn Therapeutics, Inc. Thyromimetics

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