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WO2017006360A1 - Plug-in connector - Google Patents

Plug-in connector Download PDF

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Publication number
WO2017006360A1
WO2017006360A1 PCT/IT2016/000159 IT2016000159W WO2017006360A1 WO 2017006360 A1 WO2017006360 A1 WO 2017006360A1 IT 2016000159 W IT2016000159 W IT 2016000159W WO 2017006360 A1 WO2017006360 A1 WO 2017006360A1
Authority
WO
WIPO (PCT)
Prior art keywords
fact
shield
plug
tubular
connector according
Prior art date
Application number
PCT/IT2016/000159
Other languages
French (fr)
Inventor
Lorenzo Peretto
Alberto Bauer
Original Assignee
Green Seas Ventures, Ltd
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 Green Seas Ventures, Ltd filed Critical Green Seas Ventures, Ltd
Publication of WO2017006360A1 publication Critical patent/WO2017006360A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6683—Structural association with built-in electrical component with built-in electronic circuit with built-in sensor
    • 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
    • G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices
    • 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
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G01R15/181—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using coils without a magnetic core, e.g. Rogowski coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6581—Shield structure

Definitions

  • the present invention concerns a plug-in connector able to sense the electric field and/or the magnetic field generated by a live conductor located inside the same plug-in connector, with the purpose, for example, to allow the measurement of the voltage and/or of the current of the same live conductor in relationship with the fields sensed.
  • the present invention concerns an installation of a voltage sensor or of a combined voltage/current sensors into a plug-in connector, in which said plug-in connector is used for connecting power cables to apparatus like switchgears, transformers, etc.
  • the present invention concerns a plug-in connector of the above type able to sense the electric field and/or the magnetic field generated by the live conductor located inside the same plug-in connector without being affected by any surrounding electric fields and/or magnetic fields, such as, for example, the electric fields and/or the magnetic fields generated by other live conductors located nearby.
  • the known plug-in connectors are not able to sense the electric field and/or the magnetic field generated by the live conductor positioned into the same plug-in and, besides, they are not able to sense the electric field and/or the magnetic field generated by said live conductor positioned into the same plug-in connector without being affected by the surrounding electric fields and/or magnetic fields generated by other live conductors located nearby.
  • the object of the present invention is to overcome the aforementioned drawbacks.
  • _The invention which is characterized by the claims, solves the problem of creating a plug-in connector, in which said plug-in connector comprises a cable positioned within said plug-in connector, in which said plug-in connector is characterized by the fact in that it comprises: _a first inner shield, in which said first inner shield is made by semiconductive o conductive material, in which said first inner shield is a tubular element positioned around said the cable; _an electric field sensor, in which said electric filed sensor comprises a ring of conductive material, in which said ring is electrically isolated with respect to the first inner screen, in which said ring is able to detect the electric field lines generated by the first shield; _a second external shield, in which said second shield is a tubular element made by conductive or semiconductive material and connected to ground, in which said second screen is electrically isolated with respect to said ring, in which said second screen provides to shield the same ring with respect to the field lines generated by outer conductors positioned nearby.
  • _ Figure 1 and 1A show schematically a first embodiment of the plu-in connector proposed by the present invention (sectional views);
  • _ Figure 2 and 2A show schematically a second embodiment of the plug-in connector proposed by the present invention (sectional views);
  • _ Figure 3 and 3A show schematically a third embodiment of the plug-in connector proposed by the present invention (sectional views);
  • Figure 1 and 1A are sectional views and they illustrate a plug-in connector 100 according to a first embodiment of the present invention, that is, a plug-in connector 100 equipped with a current sensor 101 and a capacitive voltage sensor 102.
  • the plug-in connector 100 substantially, mainly, comprises:
  • the connector/sleeve 105 is made of conductive material and it is electrically connected (crimped) with respect to cable 104.
  • connection/fixing means 106 and 107 are made of conductive material, they are connected to the connector/sleeve 105 and they comprise a stem 106a connected to the connector/sleeve 105, an eyelet 106b and a screw 107a.
  • the first inner shield 108 is preferably made by semiconductive material (or by conductive material) and it is substantially a tubular element positioned around the connector/sleeve 105 and/or around the cable 104.
  • said first inner shield 108 has a shape like a bell with and aperture on the top or a shape like a sleeve.
  • said first shield 108 can be electrically connected to the live cable 104 and/or to other elements at high voltage, as for example, it can be electrically connected to the stem 106a in order to electrify said first shield 108 by contact, preferably implemented by means of an electrical contact in the vicinity of said upper opening of said inner screen 108.
  • said first shield 108 can be not electrically connected to the live cable 104 and/or it can be not electrically connected to other elements at high voltage and, in this case, said first shield 108 will be electrified by means of electrostatic induction, i.e. by a capacitive coupling between the cable/connector 104/105 and the first shield 108.
  • the current sensor 101 is preferably a Rogowski coil 109 with an external shield, in which said external shield is connected to the ground.
  • the electric field sensor 102 preferably comprises a ring 110 of conductive material, wherein said ring 110 is electrically isolated with respect to the first inner screen 108, wherein said ring 110 is preferably positioned in a spaced manner around the first inner screen 108, wherein said ring 110 is able to detect the electric field lines generated by the first shield 108, that is, it forms a capacitive coupling between the first inner shield 108 which acts as first element and the ring 110 which acts as second element.
  • the second shield 111 is a tubular element made by conductive or semiconductive material and it is connected to ground, wherein said second screen 111 is electrically isolated with respect to said ring 110, wherein said second screen 111 is preferably positioned in a spaced manner around the said ring 110, in which the said second screen 111 provides to shield the same ring 110 with respect to the field lines generated by outer conductors positioned nearby.
  • said second tubular shield 111 substantially, axially, from top to down, comprises:
  • a second portion 111b having a shape like an annulus, i.e. a region bounded by two concentric circles, i.e. like a disk with a hole in the middle;
  • first tubular portion 111a has diameter larger than said second tubular portion 111c, and in which the Rogowski coil 109 is preferably positioned in the vicinity of the top of said first tubular portion 111a and against the inner face of the same first tubular portion 111a.
  • the current sensor 101 Rogowski 109 and the voltage sensor 102 (ring 110) are provided with respective cables 109a (shielded twisted-pair) and 110a (shielded-cable) for transmitting the signals to the conditioning circuit 113 located in the shielded chamber 112, inside the outer covering 115.
  • _a bottom face F2_100 configured by the portion 111a of the second tubular shield 111
  • _a lower face F3_100 configured by the second portion 111b of the second tubular shield 111
  • the inner shield 108 is at high voltage and features two functions: 1)_it generates the electric field detected by the voltage capacitive sensor 102; and 2)_it acts as a screen for electric fields not generated by the inner shield 108.
  • the internal screen 108 is at high potential and execute also the function, >_of covering/shielding the end portion of the cable 104 and/or
  • conditioning circuit 113 With reference to the conditioning circuit 113 it provides the proper amplification or attenuation of the signal from the sensors 101 and 102 as well as filtering and phase adjustment.
  • FIG. 2 and 2A illustrate a plug-in connector 200 according to a second embodiment of the present invention, that is, a plug-in connector 200 equipped with capacitive voltage sensor 202.
  • the plug-in connector 200 substantially, mainly, comprises:
  • the connector/sleeve 205 is made by conductive material and it is electrically connected (crimped) with respect to cable 204.
  • connection/fixing means 206 and 207 are made by conductive material and they are connected to the connector/sleeve 205 and they comprise a stem 206a connected to the connector/sleeve 205, an eyelet 206b and a screw 207a.
  • the first inner shield 208 is preferably made by semiconductor material (or by conductive material) and it is substantially a tubular element positioned around the connector/sleeve 205 and/or around the cable 204.
  • said first inner shield 208 has a shape like a bell with and aperture on the top or a shape like a sleeve.
  • said first shield 208 can be electrically connected to the live cable 204 and/or to other elements at high voltage and, for example, it can be electrically connected to the stem 206a in order to electrify said first shield 208 by contact, preferably implemented by means of an electrical contact in the vicinity of said upper opening of said inner screen 208.
  • said first shield 208 can be not electrically connected to the live cable 204 and/or it can be not electrically connected to other elements at high voltage and, in this case, said first shield 208 will be electrified by means of electrostatic induction, i.e. by a capacitive coupling between the connector/sleeve 205 and/or cable 204 and the first shield 208.
  • the electric field sensor 202 preferably comprises a ring 210 of conductive material, wherein said ring 210 is electrically isolated with respect to the first inner screen 208, wherein said ring 210 is preferably positioned in a spaced manner around the first inner screen 208, wherein said ring 210 is able to detect the electric field lines generated by the first shield 208, that is, it forms a capacitive coupling between the first inner shield 208 which acts as first element and the ring 210 which acts as second element.
  • the second shield 211 is a tubular element made by conductive or semiconductive material and it is connected to ground, wherein said second screen 211 is electrically isolated with respect to said ring 210, wherein said second screen 211 is preferably positioned in spaced manner around the said ring 210, in which the said second screen 211 provides to shield the same ring 210 with respect to the field lines generated by outer conductors positioned nearby.
  • said second tubular shield 211 substantially, axially, from top to down, comprises:
  • first portion 211a having a shape like an annulus, i.e. a region bounded by two concentric circles, i.e. like a disk with a hole in the middle;
  • a third portion 211c having a shape like an annulus, i.e. a region bounded by two concentric circles, i.e. like a disk with a hole in the middle;
  • the voltage sensor 202 (ring 210) is provided with a shielded cable 210a for transmitting the signals to the conditioning circuit 213 located in the shielded chamber 212 inside the outer covering 215.
  • the inner shield 208 is at high voltage and features two functions: 1)_it generates the electric field detected by the voltage capacitive sensor 202; and 2)_it acts as a shield for electric fields not generated by the inner shield 208.
  • the internal screen 208 is at high potential and execute also the function, >_of covering/shielding the end portion of the cable 204 and/or
  • conditioning circuit 213 With reference to the conditioning circuit 213 it provides the proper amplification or attenuation of the signal from the sensors 201 and 202 as well as filtering and phase adjustment.
  • Jt includes one conductor at ground potential, one shield at ground potential and one conductor carrying the conditioned signal from the voltage sensor (common- mode output).
  • FIG. 3 and 3A illustrate a plug-in connector 300 according to a third embodiment of the present invention, that is, a plug-in connector 300 equipped with a current sensor 301 and a capacitive sensor voltage 302.
  • the plug-in connector 300 substantially, mainly, comprises:
  • the connector/sleeve 305 is made of conductive material and it is electrically connected (crimped) with respect to cable 304.
  • connection/fixing means 306 and 307 are made of conductive material, they are connected to the connector/sleeve 305 and they comprise a stem 306a connected to the connector/sleeve 305, an eyelet 306b and a screw 307a.
  • the first inner shield 308 is preferably made by semiconductor material (or by conductive material) and it is substantially a tubular element positioned around the connector/sleeve 305 and/or around the cable 304.
  • said first inner shield 308 has a shape like a bell with and aperture on the top or a shape like a sleeve.
  • said first shield 308 can be electrically connected to the live cable 304 and/or to other elements at high voltage, as for example, it can be electrically connected to the stem 306a in order to electrify said first shield 308 by contact, preferably implemented by means of an electrical contact in the vicinity of said upper opening of said inner screen 308.
  • said first shield 308 can be not electrically connected to the live cable 304 and/or it can be not electrically connected to other elements at high voltage and, in this case, said first shield 308 will be electrified by means of electrostatic induction, i.e. by a capacitive coupling between the cable/connector 304/305 and the first shield 308.
  • the current sensor 301 is preferably a Rogowski coil 309 with an external shield, in which said external shield is connected to the ground.
  • the electric field sensor 302 preferably comprises a ring 310 of conductive material, wherein said ring 310 is electrically isolated with respect to the first inner screen 308, wherein said ring 310 is preferably positioned in a spaced manner around the first inner screen 308, wherein said ring 310 is able to detect the electric field lines generated by the first shield 308, that is, it forms a capacitive coupling between the first inner shield 308 which acts as first element and the ring 310 which acts as second element.
  • the second shield 311 is a tubular element made by conductive or semiconductive material and it is connected to ground, wherein said second screen 311 is electrically isolated with respect to said ring 310, wherein said second screen 311 is preferably positioned in spaced manner around the said ring 310, in which the said second screen 311 provides to shield the same ring 310 with respect to the field lines generated by outer conductors positioned nearby.
  • said second tubular shield 31 substantially, axially, from top to down, comprises:
  • _a second portion 311b having a shape like an annulus, i.e. a region bounded by two concentric circles, i.e. like a disk with a hole in the middle;
  • _a fourth portion 311d having a shape like an annulus, i.e. a region bounded by two concentric circles, i.e. like a disk with a hole in the middle;
  • the third tubular portion 311c has diameter larger than said first tubular portion 311a and larger than said fifth portion 311e.
  • the Rogowski coil 309 is positioned externally with respect to the second tubular shield 311 and, preferably, said Rogowski coil 309 is positioned around and near to the first portion 311a as well as close to the upper face of the second portion 311 b, in order to reduce the overall dimensions.
  • the current sensor 301 Rogowski 309 and the voltage sensor 302 (ring 310) are provided with respective cables 309a (shielded twisted-pair) and 310a (shielded cable) for transmitting the signals to the conditioning circuit 313 disposed within the shielded chamber 312 formed in the outer covering 315.
  • cables 309a shieldded twisted-pair
  • 310a shieldded cable
  • the inner shield 308 is at high voltage and features two functions: 1)_it generates the electric field detected by the voltage capacitive sensor 302; and 2)_it acts as a screen for electric fields not generated by the inner shield 308.
  • _The internal screen 308 is at high potential and execute also the function: >_of covering/shielding the end portion of the cable 304 and/or
  • conditioning circuit 313 provides the proper amplification or attenuation of the signal from the sensors 301 and 302 as well as filtering and phase adjustment.
  • Jt includes two conductors for the conditioned differential-mode output of the current sensor, one conductor at ground potential, one shield at ground potential and one conductor carrying the conditioned signal from the voltage sensor (common-mode output).

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

_A plug-in connector comprises: >_a cable (104) positioned within said connector; >_a first inner shield (108) made by semiconductive o conductive material, in which said first inner shield is a tubular element positioned around said the cable (104); >_an electric field sensor (102) which comprises a ring (110) of conductive material which is electrically isolated with respect to the first inner screen (108), in which said ring (110) is able to detect the electric field lines generated by the first shield (108); _a second external shield (111) made by conductive or semiconductive material and connected to ground, in which said second screen (111) provides to shield the same ring (1 10) with respect to the field lines generated by outer conductors positioned nearby.

Description

TITLE
Plug-in Connector
* _ * * *
TECHNICAL FIELD
_The present invention concerns a plug-in connector able to sense the electric field and/or the magnetic field generated by a live conductor located inside the same plug-in connector, with the purpose, for example, to allow the measurement of the voltage and/or of the current of the same live conductor in relationship with the fields sensed.
_ln other words the present invention concerns an installation of a voltage sensor or of a combined voltage/current sensors into a plug-in connector, in which said plug-in connector is used for connecting power cables to apparatus like switchgears, transformers, etc.
_More in particular, the present invention concerns a plug-in connector of the above type able to sense the electric field and/or the magnetic field generated by the live conductor located inside the same plug-in connector without being affected by any surrounding electric fields and/or magnetic fields, such as, for example, the electric fields and/or the magnetic fields generated by other live conductors located nearby.
* * * *
BACKGROUND OF THE INVENTION
_At the present the known plug-in connectors are not able to sense the electric field and/or the magnetic field generated by the live conductor positioned into the same plug-in and, besides, they are not able to sense the electric field and/or the magnetic field generated by said live conductor positioned into the same plug-in connector without being affected by the surrounding electric fields and/or magnetic fields generated by other live conductors located nearby.
* * * *
DISCLOSURE OF THE INVENTION
_The object of the present invention is to overcome the aforementioned drawbacks.
_The invention, which is characterized by the claims, solves the problem of creating a plug-in connector, in which said plug-in connector comprises a cable positioned within said plug-in connector, in which said plug-in connector is characterized by the fact in that it comprises: _a first inner shield, in which said first inner shield is made by semiconductive o conductive material, in which said first inner shield is a tubular element positioned around said the cable; _an electric field sensor, in which said electric filed sensor comprises a ring of conductive material, in which said ring is electrically isolated with respect to the first inner screen, in which said ring is able to detect the electric field lines generated by the first shield; _a second external shield, in which said second shield is a tubular element made by conductive or semiconductive material and connected to ground, in which said second screen is electrically isolated with respect to said ring, in which said second screen provides to shield the same ring with respect to the field lines generated by outer conductors positioned nearby.
* * * *
BRIEF DESCRIPTION OF THE ATTACHED DRAWINGS
_The descriptions of the plug-in connectors proposed by the present invention, in various practical embodiments, are provided by way of non-limiting example and make reference to the appended drawings, in which:
_Figure 1 and 1A show schematically a first embodiment of the plu-in connector proposed by the present invention (sectional views); _Figure 2 and 2A show schematically a second embodiment of the plug-in connector proposed by the present invention (sectional views); _Figure 3 and 3A show schematically a third embodiment of the plug-in connector proposed by the present invention (sectional views);
* * * *
BEST MODE OF CARRYING OUT THE INVENTION
First Embodiment - Figs. 1 and 1A
_With Reference to Figure 1 and 1A they are sectional views and they illustrate a plug-in connector 100 according to a first embodiment of the present invention, that is, a plug-in connector 100 equipped with a current sensor 101 and a capacitive voltage sensor 102.
_The plug-in connector 100, substantially, mainly, comprises:
_a cable 104 (core), live conductor
_a connector/sleeve 105 _connection/fixing means 106 and 107
_a first inner shield 108
_a current sensor 101
_an electric field sensor 102
_a second external shield 111
_a screened room 112
_a conditioning circuit 113
_a output cable 114
_a outer covering 115
_The connector/sleeve 105 is made of conductive material and it is electrically connected (crimped) with respect to cable 104.
_The connection/fixing means 106 and 107 are made of conductive material, they are connected to the connector/sleeve 105 and they comprise a stem 106a connected to the connector/sleeve 105, an eyelet 106b and a screw 107a.
_The first inner shield 108 is preferably made by semiconductive material (or by conductive material) and it is substantially a tubular element positioned around the connector/sleeve 105 and/or around the cable 104.
_Preferably said first inner shield 108 has a shape like a bell with and aperture on the top or a shape like a sleeve.
_Again said first shield 108 can be electrically connected to the live cable 104 and/or to other elements at high voltage, as for example, it can be electrically connected to the stem 106a in order to electrify said first shield 108 by contact, preferably implemented by means of an electrical contact in the vicinity of said upper opening of said inner screen 108.
Jn this context, if preferable, said first shield 108 can be not electrically connected to the live cable 104 and/or it can be not electrically connected to other elements at high voltage and, in this case, said first shield 108 will be electrified by means of electrostatic induction, i.e. by a capacitive coupling between the cable/connector 104/105 and the first shield 108.
_The current sensor 101 is preferably a Rogowski coil 109 with an external shield, in which said external shield is connected to the ground.
_The electric field sensor 102, preferably comprises a ring 110 of conductive material, wherein said ring 110 is electrically isolated with respect to the first inner screen 108, wherein said ring 110 is preferably positioned in a spaced manner around the first inner screen 108, wherein said ring 110 is able to detect the electric field lines generated by the first shield 108, that is, it forms a capacitive coupling between the first inner shield 108 which acts as first element and the ring 110 which acts as second element.
_The second shield 111 is a tubular element made by conductive or semiconductive material and it is connected to ground, wherein said second screen 111 is electrically isolated with respect to said ring 110, wherein said second screen 111 is preferably positioned in a spaced manner around the said ring 110, in which the said second screen 111 provides to shield the same ring 110 with respect to the field lines generated by outer conductors positioned nearby.
_Said second tubular shield 111, substantially, axially, from top to down, comprises:
>_a first portion 111a having a shape like a tubular
>_a second portion 111b having a shape like an annulus, i.e. a region bounded by two concentric circles, i.e. like a disk with a hole in the middle;
>_a third portion 111c having a shape like a tubular;
wherein said first tubular portion 111a has diameter larger than said second tubular portion 111c, and in which the Rogowski coil 109 is preferably positioned in the vicinity of the top of said first tubular portion 111a and against the inner face of the same first tubular portion 111a.
_The current sensor 101 (Rogowski 109) and the voltage sensor 102 (ring 110) are provided with respective cables 109a (shielded twisted-pair) and 110a (shielded-cable) for transmitting the signals to the conditioning circuit 113 located in the shielded chamber 112, inside the outer covering 115.
Jn this context, by means of the embodiment described above, it is formed/configured a circular groove having preferably a cross section in the form of a "U" open radially inwards, wherein said groove comprises:
_a top face F1_100 configured by the lower face of the shield of the
Rogowski coil 109;
_a bottom face F2_100 configured by the portion 111a of the second tubular shield 111; _a lower face F3_100 configured by the second portion 111b of the second tubular shield 111;
in which the sensor_ring 102_110 is disposed into said circular groove.
_The inner shield 108 is at high voltage and features two functions: 1)_it generates the electric field detected by the voltage capacitive sensor 102; and 2)_it acts as a screen for electric fields not generated by the inner shield 108.
_The internal screen 108 is at high potential and execute also the function, >_of covering/shielding the end portion of the cable 104 and/or
>_of covering/shielding the connector/sleeve 105 and/or
>_of covering/shielding the fixing means 106a,
with respect to the electric fields not generated by the same internal screen 108.
_With reference to the conditioning circuit 113 it provides the proper amplification or attenuation of the signal from the sensors 101 and 102 as well as filtering and phase adjustment.
_With reference to the cables 109a and 110a they are shielded cables. _This in order, for the voltage sensor, to allow that only the electric field detected by the plate_ring 110 is used for the primary voltage measurement and, for the cable 109a, for avoiding that common-mode voltages couple with the twisted wires. _With reference to the output cable 114 it is a shielded multiconductor cable. Jt includes two conductors for the conditioned differential-mode output of the current sensor, one conductor at ground potential, one shield at ground potential and one conductor carrying the conditioned signal from the voltage sensor (common-mode output).
* * * *
Second Embodiment - Figs. 2 and 2A
_With Reference to Figure 2 and 2A they illustrate a plug-in connector 200 according to a second embodiment of the present invention, that is, a plug-in connector 200 equipped with capacitive voltage sensor 202.
_The plug-in connector 200, substantially, mainly, comprises:
_a cable 204 (core), live conductor
_a connector/sleeve 205
_connection/fixing means 206 and 207
a first inner shield 208 _an electric field sensor 202
_a second external shield 211
_a screened room 212
_a conditioning circuit 213
_a output cable 214
_a outer covering 215
_The connector/sleeve 205 is made by conductive material and it is electrically connected (crimped) with respect to cable 204.
_The connection/fixing means 206 and 207 are made by conductive material and they are connected to the connector/sleeve 205 and they comprise a stem 206a connected to the connector/sleeve 205, an eyelet 206b and a screw 207a.
_The first inner shield 208 is preferably made by semiconductor material (or by conductive material) and it is substantially a tubular element positioned around the connector/sleeve 205 and/or around the cable 204.
_Preferably said first inner shield 208 has a shape like a bell with and aperture on the top or a shape like a sleeve.
_Said first shield 208 can be electrically connected to the live cable 204 and/or to other elements at high voltage and, for example, it can be electrically connected to the stem 206a in order to electrify said first shield 208 by contact, preferably implemented by means of an electrical contact in the vicinity of said upper opening of said inner screen 208.
_ln this context, if preferable, said first shield 208 can be not electrically connected to the live cable 204 and/or it can be not electrically connected to other elements at high voltage and, in this case, said first shield 208 will be electrified by means of electrostatic induction, i.e. by a capacitive coupling between the connector/sleeve 205 and/or cable 204 and the first shield 208.
_The electric field sensor 202, preferably comprises a ring 210 of conductive material, wherein said ring 210 is electrically isolated with respect to the first inner screen 208, wherein said ring 210 is preferably positioned in a spaced manner around the first inner screen 208, wherein said ring 210 is able to detect the electric field lines generated by the first shield 208, that is, it forms a capacitive coupling between the first inner shield 208 which acts as first element and the ring 210 which acts as second element. _The second shield 211 is a tubular element made by conductive or semiconductive material and it is connected to ground, wherein said second screen 211 is electrically isolated with respect to said ring 210, wherein said second screen 211 is preferably positioned in spaced manner around the said ring 210, in which the said second screen 211 provides to shield the same ring 210 with respect to the field lines generated by outer conductors positioned nearby.
_Said second tubular shield 211, substantially, axially, from top to down, comprises:
>_a first portion 211a having a shape like an annulus, i.e. a region bounded by two concentric circles, i.e. like a disk with a hole in the middle;
>_a second portion 211b having a shape like a tubular;
>_a third portion 211c having a shape like an annulus, i.e. a region bounded by two concentric circles, i.e. like a disk with a hole in the middle;
>_a fourth portion 211d having a shape like a tubular;
in which the second tubular portion 211b has diameter larger than said fourth tubular portion 211d.
_The voltage sensor 202 (ring 210) is provided with a shielded cable 210a for transmitting the signals to the conditioning circuit 213 located in the shielded chamber 212 inside the outer covering 215.
_ln this context, by means of the embodiment described above, it is formed/configured a circular groove having preferably a cross section in the form of a "U" open radially inwards, wherein said groove comprises:
>_a top face F1_200 configured by the first portion 211a of said second tubular shield 211;
_a bottom face F2_200 configured by the second portion 211b of said second tubular shield 211 ;
_a lower face F3_200 configured by the third portion 211c of said second tubular shield 211 ;
in which the sensor/ring 202/210 is positioned into said circular groove.
_The inner shield 208 is at high voltage and features two functions: 1)_it generates the electric field detected by the voltage capacitive sensor 202; and 2)_it acts as a shield for electric fields not generated by the inner shield 208. _The internal screen 208 is at high potential and execute also the function, >_of covering/shielding the end portion of the cable 204 and/or
>_of covering/shielding the connector/sleeve 205 and/or
>_of covering/shielding the fixing means 206a,
with respect to the electric fields not generated by the same internal screen 208.
_With reference to the conditioning circuit 213 it provides the proper amplification or attenuation of the signal from the sensors 201 and 202 as well as filtering and phase adjustment.
_With reference to the cable 210a it is a shielded cable. _This in order to allow that only the electric field detected by the plate_ring 210 is used for the primary voltage measurement.
_With reference to the output cable 214 it is a shielded multiconductor cable. Jt includes one conductor at ground potential, one shield at ground potential and one conductor carrying the conditioned signal from the voltage sensor (common- mode output).
* * * *
Third Embodiment - Figs. 3 and 3A
_With Reference to Figure 3 and 3A they illustrate a plug-in connector 300 according to a third embodiment of the present invention, that is, a plug-in connector 300 equipped with a current sensor 301 and a capacitive sensor voltage 302.
_The plug-in connector 300, substantially, mainly, comprises:
_a cable 304 (core), live conductor
_a connector/sleeve 305
_connection/fixing means 306 and 307
_a first inner shield 308
_a current sensor 301
_an electric field sensor 302
_a second external shield 311
_a screened room 312
_a conditioning circuit 313
_a output cable 314
_a outer covering 315 _The connector/sleeve 305 is made of conductive material and it is electrically connected (crimped) with respect to cable 304.
_The connection/fixing means 306 and 307 are made of conductive material, they are connected to the connector/sleeve 305 and they comprise a stem 306a connected to the connector/sleeve 305, an eyelet 306b and a screw 307a.
_The first inner shield 308 is preferably made by semiconductor material (or by conductive material) and it is substantially a tubular element positioned around the connector/sleeve 305 and/or around the cable 304.
_Preferably said first inner shield 308 has a shape like a bell with and aperture on the top or a shape like a sleeve.
_Said first shield 308 can be electrically connected to the live cable 304 and/or to other elements at high voltage, as for example, it can be electrically connected to the stem 306a in order to electrify said first shield 308 by contact, preferably implemented by means of an electrical contact in the vicinity of said upper opening of said inner screen 308.
Jn this context, if preferable, said first shield 308 can be not electrically connected to the live cable 304 and/or it can be not electrically connected to other elements at high voltage and, in this case, said first shield 308 will be electrified by means of electrostatic induction, i.e. by a capacitive coupling between the cable/connector 304/305 and the first shield 308.
_The current sensor 301 is preferably a Rogowski coil 309 with an external shield, in which said external shield is connected to the ground.
_The electric field sensor 302, preferably comprises a ring 310 of conductive material, wherein said ring 310 is electrically isolated with respect to the first inner screen 308, wherein said ring 310 is preferably positioned in a spaced manner around the first inner screen 308, wherein said ring 310 is able to detect the electric field lines generated by the first shield 308, that is, it forms a capacitive coupling between the first inner shield 308 which acts as first element and the ring 310 which acts as second element.
_The second shield 311 is a tubular element made by conductive or semiconductive material and it is connected to ground, wherein said second screen 311 is electrically isolated with respect to said ring 310, wherein said second screen 311 is preferably positioned in spaced manner around the said ring 310, in which the said second screen 311 provides to shield the same ring 310 with respect to the field lines generated by outer conductors positioned nearby.
_Said second tubular shield 311, substantially, axially, from top to down, comprises:
_a first portion 311a having a shape like a tubular
_a second portion 311b having a shape like an annulus, i.e. a region bounded by two concentric circles, i.e. like a disk with a hole in the middle;
_a third portion 311c having a shape like a tubular
_a fourth portion 311d having a shape like an annulus, i.e. a region bounded by two concentric circles, i.e. like a disk with a hole in the middle;
_a fifth portion 311e having a shape like a tubular
in which the third tubular portion 311c has diameter larger than said first tubular portion 311a and larger than said fifth portion 311e.
Jn this configuration the Rogowski coil 309 is positioned externally with respect to the second tubular shield 311 and, preferably, said Rogowski coil 309 is positioned around and near to the first portion 311a as well as close to the upper face of the second portion 311 b, in order to reduce the overall dimensions.
_The current sensor 301 (Rogowski 309) and the voltage sensor 302 (ring 310) are provided with respective cables 309a (shielded twisted-pair) and 310a (shielded cable) for transmitting the signals to the conditioning circuit 313 disposed within the shielded chamber 312 formed in the outer covering 315.
_ln this context, by means of the embodiment described above, it is formed/configured a circular groove having preferably a cross section in the form of a "U" open radially inwards, wherein said groove comprises:
>_a top face F1_300 configured by the second portion 311b of the second tubular shield 311 ;
_a bottom face F2_300 configured by the third portion 311c of the second tubular shield 311;
_a lower face F3_300 configured by the fourth portion 311d of the second tubular shield 311; in which the sensor/ring 302/310 is disposed into said circular groove.
_The inner shield 308 is at high voltage and features two functions: 1)_it generates the electric field detected by the voltage capacitive sensor 302; and 2)_it acts as a screen for electric fields not generated by the inner shield 308. _The internal screen 308 is at high potential and execute also the function: >_of covering/shielding the end portion of the cable 304 and/or
>_of covering/shielding the connector/sleeve 305 and/or
>_of covering/shielding the fixing means 306a,
with respect to the electric fields not generated by the same internal screen 308. _With reference to the conditioning circuit 313 it provides the proper amplification or attenuation of the signal from the sensors 301 and 302 as well as filtering and phase adjustment.
_With reference to the cables 309a and 310a they are shielded cables. _This in order, for the voltage sensor, to allow that only the electric field detected by the platejing 310 is used for the primary voltage measurement and, for the cable 309a, for avoiding that common-mode voltages couple with the twisted wires.
_With reference to the output cable 314 it is a shielded multiconductor cable. Jt includes two conductors for the conditioned differential-mode output of the current sensor, one conductor at ground potential, one shield at ground potential and one conductor carrying the conditioned signal from the voltage sensor (common-mode output).

Claims

01) _Plug-in connector, comprising a cable (104/204/304) positioned within said connector, characterized by the fact in that it comprises:
_a first inner shield (108/208/308), in which said first inner shield (108/208/308) is made by semiconductive o conductive material, in which said first inner shield (108/208/308) is a tubular element positioned around said the cable (104/204/304);
_an electric field sensor (102/202/302), in which said electric filed sensor (102/202/302) comprises a ring (110/210/310) of conductive material, in which said ring (110/210/310) is electrically isolated with respect to the first inner screen (108/208/308), in which said ring (110/210/310) is able to detect the electric field lines generated by the first shield (108/205/308);
_a second external shield (111/211/311), in which said second shield (111/211/311) is a tubular element made by conductive or semiconductive material and connected to ground, in which said second screen (111/211/311) is electrically isolated with respect to said ring (110/210/310), in which said second screen (111/211/311) provides to shield the same ring (110/210/310) with respect to the field lines generated by outer conductors positioned nearby.
02) _Plug-in connector according to claim 1 , characterized by the fact that it further comprises a connector/sleeve (105/205/305) made of conductive material and electrically connected with the cable (104/204/304) and by the fact that said first inner shield (108/208/308) is positioned around said connector/sleeve (105/205/305).
03) _Plug-in connector according to claim 1 or 2, characterized by the fact that said first inner shield (108/208/308) has a shape like a bell with and aperture on the top.
04) _Plug-in connector according to claim 1 or 2, characterized by the fact that said first inner shield (108/208/308) has a shape like a sleeve.
05) _Plug-in connector according to one of claims 1 to 4, characterized by the fact that said first inner shield (108/208/308) execute also the function of covering/shielding an end portion of the cable (104/204/304). 06) _Plug-in connector according to any one of claims 1 to 5, characterized by the fact that said first inner shield (108/208/308) execute also the function of covering/shielding a connector/sleeve (105/205/305).
07) _Plug-in connector according to any one of claims 1 to 6, characterized by the fact that said first inner shield (108/208/308) execute also the function of covering/shielding fixing means (106a/206a/306a).
08) _Plug-in connector according to any one of claims 1 to 7, characterized by the fact that said first inner shield (108/208/308) is electrically connected with the live cable (104/204/304).
09)_Plug-in connector according to any one of claims 1 to 8, characterized by the fact that said first inner shield (108/208/308) is electrically connected with other elements of the plug-in connector.
10) _Plug-in connector according to any one of claims 1 to 9, characterized by the fact that it comprises connection/fixing means (106/206/306), by the fact that said connection/fixing means (106/206/306) are made of conductive material, by the fact that said connection/fixing means (106/206/306) are electrically connected with the cable (104/204/304), by the fact that said connection/fixing means (106/206/306) comprises a stem (106a/206a/306a) connected with the cable (104/204/304) and by the fact that said first inner shield (108/208/308) is electrically connected with stem (106a/206a/306a).
11) _Plug-in connector according to any one of claims 1 to 10, characterized by the fact that it comprises connection/fixing means (106/206/306), by the fact that said connection/fixing means (106/206/306) are made of conductive material, by the fact that said connection/fixing means (106/206/306) are electrically connected with a connector/sleeve (105/205/305), by the fact that said connection/fixing means (106/206/306) comprises a stem (106a/206a/306a) connected with a connector/sleeve (105/205/305) electrically connected with the cable (104/204/304) and by the fact that said first inner shield (108/208/308) is electrically connected with stem (106a/206a/306a).
12) _Plug-in connector according to claim 1 1 , characterized by the fact that said first inner shield (108/208/308) is electrically connected with said stem (106a/206a/306a) by means of an electrical contact implemented in the vicinity of said upper opening of said inner screen (108/208/308).
13) _Plug-in connector according to according to any one of claims 1 to 7, characterized by the fact that said first shield (108/208/308) is electrified by means of electrostatic induction.
14) _Plug-in connector according to claim 13, characterized by the fact that said first shield (108/208/308) is electrified by means of a capacitive coupling between a conductor/sleeve (105/205/305) electrically connected with the cable (104/204/304) and said first shield (108/208/308).
15)_Plug-in connector according to according to any one of claims 1 to 14, characterized by the fact that it further comprises a current sensor (101). 16)_Plug-in connector according to claim 15, characterized by the fact that it said current sensor (101) is a shielded Rogowski coil (109) with the shield connected to the ground.
17)_Plug-in connector according to any one of claims 1 to 14 or according to one of claims 15 to 16, characterized by the fact that said second tubular shield (111), axially, from top to down, comprises:
>_a first portion (111a) having a shape like a tubular;
>_a second portion (111 b) having a shape like an annulus;
>_a third portion 111c having a shape like a tubular.
18)_Plug-in connector according to claim 17, characterized by the fact that said first tubular portion (111a) has diameter larger than said second tubular portion (111 c) and by the fact that a Rogowski coil (109) is positioned in the vicinity of the top of said first tubular portion (111a)
19)_Plug-in connector according to claim 18, characterized by the fact that said Rogowski coil (109) is positioned against the inner face of said same first tubular portion (111a).
20)_Plug-in connector according to any one of claims 17 to 19, characterized by the fact that said second tubular shield (111) and Rogowski coil (109) configure a circular groove having preferably a cross section in the form of a "U" open radially inwards, wherein said groove comprises:
_a top face (F1_100) configured by the lower face of the Rogowski coil (109); _a bottom face (F2_100) configured by the first portion (111a) of the second tubular shield (111);
_a lower face (F3_100) configured by the second portion (111b) of the second tubular shield (111).
21)_Plug-in connector according to claim 21 , characterized by the fact that the sensor_ring (102_110) is positioned into said circular groove.
22) _Plug-in connector according to according any one of claims 1 to 14, characterized by the fact that said second tubular shield (211), axially, from top to down, comprises:
>_a first portion (211a) having a shape like an annulus;
>_a second portion (211b) having a shape like a tubular;
>_a third portion (211c) having a shape like an annulus;
>_a fourth portion (211d) having a shape like a tubular.
23) _Plug-in connector according to claim 22, characterized by the fact that said second portion (211b) having a shape like a tubular has a diameter larger than said fourth portion (211d) having a shape like a tubular.
24) _Plug-in connector according to claim 22 or 23, characterized by the fact that said second screen (211) configures a circular groove having a cross section in the form of a "U" open radially inwards, in which groove comprises:
>_a top face (F1_200) configured by the first portion (211a) of said second tubular shield (211);
>_a bottom face (F2_200) configured by the second portion (211b) of said second tubular shield (211);
>_a lower face (F3_200) configured by the third portion (211c) of said second tubular shield (211).
25) _Plug-in connector according to claim 24, characterized by the fact that said sensor_ring (202, 210) is positioned into said circular groove.
26) _Plug-in connector according to claim 1 to 14, characterized by the fact that said second tubular screen (311), axially, from top to down, comprises:
>_a first portion (311a) having a shape like a tubular
>_a second portion (311b) having a shape like an annulus;
>_a third portion (311c) having a shape like a tubular; >_a fourth portion (311d) having a shape like an annulus;
>_a fifth portion (311e) having a shape like a tubular.
27) _Plug-in connector according to claim 26, characterized by the fact that said third portion (311c) having a shape like a tubular has a diameter larger than said first portion (31 a) having a shape like a tubular.
28) _Plug-in connector according to claim 26 or 27, characterized by the fact that said third portion (311c) having a shape like a tubular has a diameter larger than said fifth portion (311e) having a shape like a tubular.
29) _Plug-in connector according to any one of the claims 26 to 28, characterized by the fact that said second shield (311) configures a circular groove having preferably a cross section in the form of a "U" open radially inwards, wherein said groove comprises:
>_a top face (F1_300) configured by the second portion (311 b) of the second tubular shield (311 );
>_a bottom face (F2_300) configured by the third portion (311 c) of the second tubular shield (311);
>_a lower face (F3_300) configured by the fourth portion (311d) of the second tubular shield (311).
30) _Plug-in connector according to claim 29, characterized by the fact that said sensor_ring (302, 310) is disposed into said circular groove.
PCT/IT2016/000159 2015-07-05 2016-06-20 Plug-in connector WO2017006360A1 (en)

Applications Claiming Priority (4)

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US201562188679P 2015-07-05 2015-07-05
US201562188678P 2015-07-05 2015-07-05
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CN111542973A (en) * 2018-12-20 2020-08-14 Abb瑞士股份有限公司 Power cable connector, power system and method for assembling power cable connector

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US5432438A (en) * 1991-06-29 1995-07-11 Asea Brown Boverti Ltd. Combined current and voltage transformer for a metal-enclosed gas-insulated high-voltage switching station
DE4435864A1 (en) * 1994-10-07 1996-04-11 Pfisterer Elektrotech Karl Set in the form of a bushing or a socket for cable plugs
US20120098519A1 (en) * 2010-10-26 2012-04-26 Juds Mark A Sensor assembly, trip unit including the same, and method of manufacturing a sensor assembly
US20120243140A1 (en) * 2011-03-22 2012-09-27 Nikhil Purushottam Gan Circuit protection device for use in medium and high voltage environments
EP2819250A1 (en) * 2013-06-26 2014-12-31 3M Innovative Properties Company Cable connection device
EP2824787A2 (en) * 2013-06-28 2015-01-14 Thomas & Betts International, LLC Electrical connector having cold shrink component

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Publication number Priority date Publication date Assignee Title
US5432438A (en) * 1991-06-29 1995-07-11 Asea Brown Boverti Ltd. Combined current and voltage transformer for a metal-enclosed gas-insulated high-voltage switching station
DE4435864A1 (en) * 1994-10-07 1996-04-11 Pfisterer Elektrotech Karl Set in the form of a bushing or a socket for cable plugs
US20120098519A1 (en) * 2010-10-26 2012-04-26 Juds Mark A Sensor assembly, trip unit including the same, and method of manufacturing a sensor assembly
US20120243140A1 (en) * 2011-03-22 2012-09-27 Nikhil Purushottam Gan Circuit protection device for use in medium and high voltage environments
EP2819250A1 (en) * 2013-06-26 2014-12-31 3M Innovative Properties Company Cable connection device
EP2824787A2 (en) * 2013-06-28 2015-01-14 Thomas & Betts International, LLC Electrical connector having cold shrink component

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111542973A (en) * 2018-12-20 2020-08-14 Abb瑞士股份有限公司 Power cable connector, power system and method for assembling power cable connector
US11050196B2 (en) 2018-12-20 2021-06-29 Abb Schweiz Ag Power cable connector, electrical system and method for assembling power cable connector

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