WO2013077746A2 - Device for monitoring power lines and unit for mounting and dismounting of this to power lines - Google Patents

Device for monitoring power lines and unit for mounting and dismounting of this to power lines Download PDF

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Publication number
WO2013077746A2
WO2013077746A2 PCT/NO2012/050236 NO2012050236W WO2013077746A2 WO 2013077746 A2 WO2013077746 A2 WO 2013077746A2 NO 2012050236 W NO2012050236 W NO 2012050236W WO 2013077746 A2 WO2013077746 A2 WO 2013077746A2
Authority
WO
WIPO (PCT)
Prior art keywords
power line
mounting
iron core
housing
basket
Prior art date
Application number
PCT/NO2012/050236
Other languages
French (fr)
Other versions
WO2013077746A3 (en
Inventor
Eilert BJERKAN
Robert MOLDE
Olav STABERG
Geir Atle WARD
Original Assignee
Nortroll As
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 Nortroll As filed Critical Nortroll As
Publication of WO2013077746A2 publication Critical patent/WO2013077746A2/en
Publication of WO2013077746A3 publication Critical patent/WO2013077746A3/en

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Classifications

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

Definitions

  • the present invention relates to a device for monitoring power lines, according to the preamble of claim 1
  • the present invention further relates to a unit for mounting and dismounting of the device to power lines, according to the preamble of claim 1.
  • US 2008297162A it is known a device for monitoring and measuring electrical, thermal and mechanical operating conditions for high-voltage power line.
  • the device is formed by toroidal- shaped housing which can be mounted onto an energized line, which contains all necessary electrical instruments for monitoring parameters associated with the line.
  • JP 2011122939 A describes a device for monitoring power lines including a unit for mounting and dismounting of the device including a mounting basket adapted to the housing of the device.
  • the mounting basket is further provided with means for retaining the device with a certain force.
  • a device for monitoring power lines which device includes a housing which has a mainly elongated tubular shape.
  • the device is provided with means for measuring electrical and/or mechanical properties for a power line, means for communicating the measured data to a central unit, and provided with fastening means for fasting to a power line. None of the above mentioned devices are adapted for easy arrangement to a power line.
  • the mentioned devices require that one use a lift or similar, or climbs up to the power line for mounting of the device to the power line. This is work which is very hazardous, and can be difficult to carry out in difficult accessible areas. This results in addition to high costs as this requires that at least two persons are present at work on the power line, and that one in many cases will need to disconnect the power line, something which will result in economical loss for the energy company. Accordingly, there is a need for providing a device which in a simple manner can be mounted to and demounted from a power line.
  • the mam object of the present invention is to provide a device for monitoring power lines which solves the above mentioned disadvantages with prior art.
  • An object of the present invention is that the device can be mounted to and demounted from the power line in a simple manner from the ground without that an installer needs to come near the power line, such that the personal safety is ensured.
  • the device can be mounted and demounted while the power line is u nder voltage, so that this not results in disconnection time and following economical loss.
  • An object of the present invention is to provide a unit for mounting and dismounting of the device for monitoring power lines.
  • An object with the present invention is to provide a u nit for mou nting and dismounting of the device for monitoring power lines which ca n be handled by one person.
  • One object of the present invention is to provide a unit for mounting and dismounting of the device for monitoring of power lines which is provided with means for ensuring that the device will not be damaged by voltage discharges from the power line during mounting or dismounting.
  • a device for monitoring power lines according to the present invention is described in claim 1. Preferable featu res of the device are described in the claims 2-9.
  • a unit for mounting and dismounting of the device to power lines is described in claim 10.
  • Preferable featu res of the unit are described in the claims 11-13.
  • a device for monitoring power lines by measu ring different parameters In this lies measurement of electrical properties like frequency, load current, fau lt current, harmonic currents and voltage quality, and physical properties like vibrations and line temperature.
  • the device according to the invention is arranged for being directly mounted on the power line, preferably while the power line is under voltage, by means of a unit for mounting and dismounting of the device according to the invention.
  • the device for monitoring of power lines includes a housing, which is adapted for plain mounting and dismounting to/from a power line by means of a unit for mounting and dismounting of the device according to the present invention, so that mounting and dismounting of the device to a power line can be performed from ground level.
  • the device further includes means for retaining the device securely to the power line.
  • the device is further provided with means and/or software for measuring mechanical, electrical and/or thermal properties for the power line, and can also be arranged for measuring vibrations and/or tension, line temperature, load current, etc., of the power line.
  • the device can further be arranged for drawing current directly from the power line it is mounted on, and can be provided with batteries, solar cells or similar for power supply, so that the device functions even if the power line is inoperative. In its simplest embodiment it is provided with batteries which have long operating time.
  • the device can further be provided with piezoelectric elements or accelerometers, which can be arranged for measuring and utilizing energy for power supply.
  • the device further includes communication means for transferring measured values to another device, a base unit, central unit or similar.
  • communication means for transferring measured values to another device, a base unit, central unit or similar.
  • Several devices can be mounted next to each other on separate power lines, so that they can communicate with each other with the purpose of measuring phase difference between the line currents. This information can be used to detect ground fault and phase failure.
  • the device can also be arranged for communicating with a control unit for settings of the device, troubleshooting or updating the device, such as the software of the device or for calibration of the sensors of the device.
  • the sensors of the device can also be self-calibrating.
  • the present invention further includes a unit for easy mounting and dismounting of the above mentioned device to a power line.
  • the unit for mounting and dismounting includes a specially adapted mounting basket which is arranged for holding the device securely in connection with mounting and dismounting and which in a simple manner can be mount the device to the power line and demount the device from the power line. It is further preferable that the unit for mounting and dismounting of the device includes means, such as voltage dischargers, for preventing sparkover of electricity to the device in connection with mounting and dismounting of the device, which would result in that the device will not work optimally.
  • WUV Work under Voltage
  • Figure la is a perspective drawing of a device for monitoring power lines according to the invention.
  • Figure lb shows the device in Figure la seen from above
  • Figure 2 is a split-up view of the device in Figure la which shows details of the device
  • Figure 3a shows the device in Figure la seen from one side, which side lies to left in Figures la and 2,
  • Figure 3b shows the device in Figure la seen from one side, which side lies to right in Figure la and 2
  • Figure 4a shows a device according to the invention fixed in a unit according to the invention for mounting and dismounting of the device to/from a power line
  • Figure 4b-c is perspective drawings of a unit for mounting and dismounting of the device in Figure la to a power line
  • Figure 5a-b is perspective drawings of an alternative embodiment of a unit for mounting and dismounting the device in Figure la to a power line.
  • a device 11 for monitoring a power line according to the invention includes a housing 12, which has a mainly elongated tubular shape, which at a side which is facing up is provided with a recess 13 which extends a given distance in longitudinal direction and width direction of the housing 12.
  • the device 11 is further at its ends in the longitudinal direction provided with fastening means for fastening to a power line.
  • the fastening means are in this example formed by two especially shaped recesses/ears 14a-b which extend in width direction of the device 11, i.e. at the ends of the housing 12, outside the recess 13, which recesses 14a-b opens to each side of the device 11.
  • the device 11 further includes guiding elements 15a-c in the recess 13 shaped for guiding a power line in place in the device 11 in connection with the mounting.
  • the device 11 can further include means for retaining the device 11 to a power line, e.g. in the form of a spring-based element 16 arranged in the recess 13, which element 16 is movable in the vertical direction of the device 11.
  • FIG. 2 shows a split-up drawing of a device 11 according to the invention, which figure shows the features described above and further main components which the device 11 according to the invention includes.
  • the device 11 further includes end covers 17a-b for arrangement on each side of the housing 12. It is preferably arranged gaskets between the end covers 17a-b and housing 12 to make the device 11 watertight.
  • the device 11 according to the invention further includes an iron core in two parts, a fixed iron core 18a and a movable iron core part 18b, respectively.
  • the fixed iron core 18a is arranged to the housing 12 by means of, for example, a mounting bracket 19a and has a mainly circular shape and is provided with an opening to allow insertion of a power line therein.
  • the movable iron core part 18b has a shape adapted to the opening of the fixed iron core 18a and is arranged on a movable bracket 19b, which movable bracket 19b preferably is provided with means for holding the movable iron core part 18b against the fixed iron core 18a and/or hold the movable iron core part 18b in a position away from the fixed iron core 18a to allow insertion of a power line therein.
  • This can, for example, be achieved by means of a helical spring 20 as shown in Figure 3a.
  • the movable bracket 19b is preferably mainly L-shaped, so that it will be moved with a power line when it is inserted in or moved out the recess 14a and in this way open or close the iron core.
  • the movable iron core part 18b can be moved between a position which allows insertion of a power line in the iron core and a position which results in that the fixed iron core 18a and the movable iron core part 18b together form a mainly circular continuous iron core which can be utilized to draw power from the power line to power the device 11 and/or for measuring electrical properties for the power line, such as magnetic field strength, frequency, load current, fault current, harmonic currents and voltage quality.
  • the housing 12 further includes a recess at the lower edge of the housing to accommodate further elements for the device 11, such as power supply means 21, in the form of e.g. batteries or solar cells, or piezoelectric elements or accelerometers for measuring and utilizing energy.
  • power supply means 21 in the form of e.g. batteries or solar cells, or piezoelectric elements or accelerometers for measuring and utilizing energy.
  • the recess at the lower edge of the housing 12 can also be utilized for accommodating a printed circuit board 22 for controlling the device 11.
  • the recess is preferably sealed from the environment with a window 23 or cover. It is further preferably arranged a gasket between the window 23 and housing 12 for making the device 11 watertight.
  • the batteries can be exchangeable batteries, so that the device needs to be brought down from the power line each time batteries are to be exchanged or they can be rechargeable, which can be recharged in several ways, e.g. by that the device 11 draws power from the power line it is connected to, by means of arrangement of solar cells to device or by means of other obvious ways for a skilled person.
  • the device according to the present invention further includes means for grounding in the form of a conductive layer 24 arranged to the housing 12, which conductive layer 24 is connected to the fixed iron core 18a by means of a grounding cable 25, which also is shown in Figure 3a. In this way it is created a reference point for current measurement in the device 11.
  • the device according to the invention further includes means for measuring current in the form of a printed circuit board 26 for current measurement, and provided with means for measuring temperature of the power line, vibrations, load current or similar.
  • means for measuring vibrations is an IR sensor 27 which can measure temperature of the power line, an accelerometer for measuring vibrations, etc.
  • FIG 3a shows the device 11 seen from one side of the device 11, which side lies to the left in Figures la and 2, where the end cover 17a is removed for disclosing details of the device 11.
  • the left part of the device 11 adapted for accommodating the fixed iron core 18a, which as mentioned has a mainly circular shape and extends between the ends of the opening formed by the recess 14a, while the movable iron core part 18b is arranged for moving in and out of the opening of the fixed iron core 18a, as indicated by the arrow A, for allowing insertion of a power line.
  • the movable iron core part 18b moves in direction of the opening of the recess 14a, so that it is provided an opening all the way from outside of the device 11 and to the interior of the iron core.
  • Figure 3 shows the device 11 seen from one side of the device 11, which side lies to the right in Figures la and 2, where the end cover 17b is removed for disclosing details of the device 11.
  • the right part of the device is adapted for accommodating means for current measurement, in the example in the form of a printed circuit board 26 adapted for current measurement, which printed circuit board 26 preferably has a mainly circular shape and is provided with an opening which face out towards the recess 14b so that a power line can be inserted therein.
  • the figure also shows a preferable location of an IR sensor 27 for measuring temperature of the power line.
  • the device 11 preferably further includes non-conducting means 28 in the form of rubber pads or similar arranged in upper part of the recesses 14a-b to provide friction against the power line so that the device does not slide along the power line when it is exposed to nature forces, such as wind and ram.
  • the device further includes communication means (not shown) between one or more of: - devices 11 arranged on separate power lines, - devices 11 arranged on the same power line,
  • the communication means can e.g. be long-distance or short-distance radio, Bluetooth communication, infrared communication, traditional GSM communication or similar.
  • the device 11 can communicate measuring signals in to a central unit directly or via other devices or base units (if the distance is too long for direct communication).
  • FIG. 4a shows a device 11 arranged in a unit according to the invention for mounting and dismounting of the device 11 to/from a power line.
  • FIGS. 4b and 4c show details of the unit for mounting and dismounting the device 11 to a power line by means of a suitable rod, preferably a WUV-rod, seen in perspective from above and below, respectively.
  • the unit includes a mounting basket 30 adapted to the device 11, i.e. the housing 12, which mounting basket 30 according to a first embodiment is formed by two mainly U-shaped elements 31, 32 which extend in longitudinal direction and width direction, respectively, and vertical direction of the mounting basket 30.
  • the U-shaped element 31 is adapted to the length and width of the device 11, as shown in Figure 4a, and forms the base of the mounting basket 30.
  • the U-shaped element 32 extends in the width direction of the mounting basket 30 and exhibits sides 33a-b having elastic properties for allowing the device 11 to be retained, as shown in Figure 4a, with sufficient force for mounting and dismounting, and at the same time the force is not larger than that the device 11 can be released from the mounting basket 30 after mounting, and that the device 11 in a simple manner can be attached to the mounting basket 30 when the device 11 is to be demounted from the power line.
  • the mounting basket 30 further includes connection means at the bottom of the U-shaped element 31 for connection to a rod or similar (not shown), preferably a WUV-rod, which can be used to bring the device 11 up to a power line and mounting the device 11 to the power line, and dismounting of this.
  • the unit 30 preferably further includes means 35 for discharging voltage in the form of dischargers are arranged protruding up from the elastic sides of the U-shaped element 32. In this way one ensures that surface voltages on the power line do not damage the device 11 in connection with mounting and dismounting.
  • FIGS 5a-b show an alternative embodiment of the unit for mounting and dismounting of the device 11.
  • the unit is in this embodiment provided with a mounting basket 30 formed by one part having a shape adapted to the device 11, i.e. the housing 12 of the device. It is further at the longitudinal sides of the mounting basket 30 arranged fastening means 36, preferably arranged at each longitudinal side of the mounting basket 30, for retaining the device 11 securely in the mounting basket 30 in connection with mounting and dismounting.
  • the fastening means 36 are preferably spring-loaded, so that a device 11 in a simple manner can be attached to the mounting basket 30 in connection with fastening of the device 11 to a power line and in a simple manner be released from the mounting basket 30 after a device 11 is fastened to a power line, and retaining the device securely as mentioned above.
  • connection means 34 at the bottom of the mounting basket 30 for arrangement of a rod or similar, preferably a WUV-rod, for bringing the device 11 up to a power line.
  • this embodiment can be provided with means 35 for discharging voltage in the form of dischargers which are arranged protruding up from the fastening means 36 or at other suitable places.
  • the device 11 By means of the unit for mounting and dismounting the device 11 can be mounted to a power line by that an installer stands on the ground below the power line.
  • the device 11 is attached to the unit, i.e. mounting basket 30 and retained by the U-shaped element 32 or the spring-loaded fastening means 36, after which the device 11 is brought up to the power line by means of e.g. a WUV-rod.
  • the device 11 is brought in contact with the power line by that the device 11 is held across the power line, so that the power line is inserted into the recess 13 of the device 11.
  • the device 11 When the device 11 is in contact with the power line the device 11 is turned 90 degrees clockwise or counterclockwise, dependent of the direction of the device, so that the power line is inserted into the recesses 14a and 14b.
  • the device 11 For making it easier to know which direction one should turn the device 11 it is preferably arranged arrows at the bottom of the housing 12 of the device 11, as shown in Figure lc, and possibly at the bottom of the mounting basket 30, which shows which direction the device 11 is to be turned for fastening to the power line or turned for being released from the power line
  • the movable part 18b of the iron core is here preferably set in a position so that it allows insertion of the power line in the iron core 18.
  • means 16, if present, for retaining the device 11 to the power line e.g. a spring-loaded element 16, is pushed down so that a force is built up in the spring-loaded element 16 which presses the device 11 against the power line.
  • the mounting basket 30 is brought in contact with the device 11, after which an upwards directed force is applied to the mounting basket 30 so that the mounting basket 30 is attached to the device via the fastening means 36 or elastic U-shaped element 32.
  • the mounting basket 30 and device 11 is turned 90 degrees clockwise or counterclockwise, dependent of the direction of the device 11 and as indicated by the arrows under the device 11, so that the power line is moved out of the recesses 14a and 14b, to a position for the device 11 which is across the power line, so that the device 11 is free from the power line.
  • the device 11 can next be lowered down.
  • the mounting basked is provided with a guiding pin at the bottom which enters a hole adapted in the device before the upwards directed force is applied to the mounting basket.

Abstract

Device (11) for monitoring power lines, which device (11) includes a housing (12), which has a mainly elongated tubular shape, and which device (11) is provided with means for measuring electrical and/or mechanical properties of a power line and means for communicating the measured values to a central unit, and provided with fastening means in the form of recesses (14a-b) for fastening to a power line, where the recesses (14a-b) extend in width direction of the housing (12) of the device, at ends thereof, which recesses (14a-b) opens to each side of the device (11). There is further provided a unit for mounting and dismounting of the device to/from a power line, which unit includes a mounting basket (30) adapted to the housing (12) of the device, which mounting basket (30) is provided with means (32, 36) for retaining the device (11) in place with a given force.

Description

Device for monitoring power lines and unit for mounting and dismounting of this to power lines
The present invention relates to a device for monitoring power lines, according to the preamble of claim 1
The present invention further relates to a unit for mounting and dismounting of the device to power lines, according to the preamble of claim 1.
Background
Power companies are increasingly facing demands to monitor power lines. This is also a demand from the authorities, and internal desires to have improved control over the overhead power distribution network with regard to performing maintenance, finding possible errors, and preventing damages from arising in the distribution network. At the same time it is also important that personal safety for line personnel is ensured.
From US 2006187074A it is known a device for monitoring electrical properties for an overhead line which carries medium voltage in a distribution network for medium voltage which includes separate sensors which each is adapted for direct connection to an overhead line which carries medium voltage.
From US 2008297162A it is known a device for monitoring and measuring electrical, thermal and mechanical operating conditions for high-voltage power line. The device is formed by toroidal- shaped housing which can be mounted onto an energized line, which contains all necessary electrical instruments for monitoring parameters associated with the line.
JP 2011122939 A describes a device for monitoring power lines including a unit for mounting and dismounting of the device including a mounting basket adapted to the housing of the device. The mounting basket is further provided with means for retaining the device with a certain force. From US 2010/0013457 Al it is known a device for monitoring power lines, which device includes a housing which has a mainly elongated tubular shape. The device is provided with means for measuring electrical and/or mechanical properties for a power line, means for communicating the measured data to a central unit, and provided with fastening means for fasting to a power line. None of the above mentioned devices are adapted for easy arrangement to a power line. The mentioned devices require that one use a lift or similar, or climbs up to the power line for mounting of the device to the power line. This is work which is very hazardous, and can be difficult to carry out in difficult accessible areas. This results in addition to high costs as this requires that at least two persons are present at work on the power line, and that one in many cases will need to disconnect the power line, something which will result in economical loss for the energy company. Accordingly, there is a need for providing a device which in a simple manner can be mounted to and demounted from a power line.
It is further a need for a device as this which can be mounted and demounted while there is voltage on the power line, so that the energy company does not need to disconnect the power line in connection with mou nting and dismounting of the device.
For further reducing the costs with mounting and dismounting of such devices there is a need for that the mounting and dismounting can be carried out by means of one person.
Object
The mam object of the present invention is to provide a device for monitoring power lines which solves the above mentioned disadvantages with prior art.
An object of the present invention is that the device can be mounted to and demounted from the power line in a simple manner from the ground without that an installer needs to come near the power line, such that the personal safety is ensured.
It is further an object that the device can be mounted and demounted while the power line is u nder voltage, so that this not results in disconnection time and following economical loss.
An object of the present invention is to provide a unit for mounting and dismounting of the device for monitoring power lines.
It is fu rther an object of the present invention to provide a unit for mounting a nd dismou nting of the device for monitoring power lines under voltage.
An object with the present invention is to provide a u nit for mou nting and dismounting of the device for monitoring power lines which ca n be handled by one person.
One object of the present invention is to provide a unit for mounting and dismounting of the device for monitoring of power lines which is provided with means for ensuring that the device will not be damaged by voltage discharges from the power line during mounting or dismounting.
The invention
A device for monitoring power lines according to the present invention is described in claim 1. Preferable featu res of the device are described in the claims 2-9.
A unit for mounting and dismounting of the device to power lines is described in claim 10. Preferable featu res of the unit are described in the claims 11-13.
According to the invention there is provided a device for monitoring power lines by measu ring different parameters. In this lies measurement of electrical properties like frequency, load current, fau lt current, harmonic currents and voltage quality, and physical properties like vibrations and line temperature. The device according to the invention is arranged for being directly mounted on the power line, preferably while the power line is under voltage, by means of a unit for mounting and dismounting of the device according to the invention.
The device for monitoring of power lines includes a housing, which is adapted for plain mounting and dismounting to/from a power line by means of a unit for mounting and dismounting of the device according to the present invention, so that mounting and dismounting of the device to a power line can be performed from ground level.
The device further includes means for retaining the device securely to the power line.
The device is further provided with means and/or software for measuring mechanical, electrical and/or thermal properties for the power line, and can also be arranged for measuring vibrations and/or tension, line temperature, load current, etc., of the power line.
The device can further be arranged for drawing current directly from the power line it is mounted on, and can be provided with batteries, solar cells or similar for power supply, so that the device functions even if the power line is inoperative. In its simplest embodiment it is provided with batteries which have long operating time.
The device can further be provided with piezoelectric elements or accelerometers, which can be arranged for measuring and utilizing energy for power supply.
The device further includes communication means for transferring measured values to another device, a base unit, central unit or similar. Several devices can be mounted next to each other on separate power lines, so that they can communicate with each other with the purpose of measuring phase difference between the line currents. This information can be used to detect ground fault and phase failure.
The device can also be arranged for communicating with a control unit for settings of the device, troubleshooting or updating the device, such as the software of the device or for calibration of the sensors of the device. The sensors of the device can also be self-calibrating.
The present invention further includes a unit for easy mounting and dismounting of the above mentioned device to a power line.
The unit for mounting and dismounting includes a specially adapted mounting basket which is arranged for holding the device securely in connection with mounting and dismounting and which in a simple manner can be mount the device to the power line and demount the device from the power line. It is further preferable that the unit for mounting and dismounting of the device includes means, such as voltage dischargers, for preventing sparkover of electricity to the device in connection with mounting and dismounting of the device, which would result in that the device will not work optimally. The unit further includes connection means for connection to a rod or similar, preferably a WUV-rod (WUV = Work under Voltage), to the mounting basket so that an installer can stand on the ground and mount the device to the power line.
Further advantages and preferable features of the invention will appear from the following example description.
Example
The invention will below be described in detail with references to the attached drawings, where:
Figure la is a perspective drawing of a device for monitoring power lines according to the invention,
Figure lb shows the device in Figure la seen from above,
Figure lc shows the device in Figure la seen from below,
Figure 2 is a split-up view of the device in Figure la which shows details of the device,
Figure 3a shows the device in Figure la seen from one side, which side lies to left in Figures la and 2,
Figure 3b shows the device in Figure la seen from one side, which side lies to right in Figure la and 2,
Figure 4a shows a device according to the invention fixed in a unit according to the invention for mounting and dismounting of the device to/from a power line,
Figure 4b-c is perspective drawings of a unit for mounting and dismounting of the device in Figure la to a power line, and
Figure 5a-b is perspective drawings of an alternative embodiment of a unit for mounting and dismounting the device in Figure la to a power line.
Reference is now made to Figure la-c which show a device 11 for monitoring a power line according to the invention. A device 11 according to the invention includes a housing 12, which has a mainly elongated tubular shape, which at a side which is facing up is provided with a recess 13 which extends a given distance in longitudinal direction and width direction of the housing 12. The device 11 is further at its ends in the longitudinal direction provided with fastening means for fastening to a power line. The fastening means are in this example formed by two especially shaped recesses/ears 14a-b which extend in width direction of the device 11, i.e. at the ends of the housing 12, outside the recess 13, which recesses 14a-b opens to each side of the device 11.
The device 11 further includes guiding elements 15a-c in the recess 13 shaped for guiding a power line in place in the device 11 in connection with the mounting. The device 11 can further include means for retaining the device 11 to a power line, e.g. in the form of a spring-based element 16 arranged in the recess 13, which element 16 is movable in the vertical direction of the device 11.
Reference is now made to Figure 2 which shows a split-up drawing of a device 11 according to the invention, which figure shows the features described above and further main components which the device 11 according to the invention includes.
The device 11 further includes end covers 17a-b for arrangement on each side of the housing 12. It is preferably arranged gaskets between the end covers 17a-b and housing 12 to make the device 11 watertight.
The device 11 according to the invention further includes an iron core in two parts, a fixed iron core 18a and a movable iron core part 18b, respectively. The fixed iron core 18a is arranged to the housing 12 by means of, for example, a mounting bracket 19a and has a mainly circular shape and is provided with an opening to allow insertion of a power line therein. The movable iron core part 18b has a shape adapted to the opening of the fixed iron core 18a and is arranged on a movable bracket 19b, which movable bracket 19b preferably is provided with means for holding the movable iron core part 18b against the fixed iron core 18a and/or hold the movable iron core part 18b in a position away from the fixed iron core 18a to allow insertion of a power line therein. This can, for example, be achieved by means of a helical spring 20 as shown in Figure 3a. The movable bracket 19b is preferably mainly L-shaped, so that it will be moved with a power line when it is inserted in or moved out the recess 14a and in this way open or close the iron core. In this way the movable iron core part 18b can be moved between a position which allows insertion of a power line in the iron core and a position which results in that the fixed iron core 18a and the movable iron core part 18b together form a mainly circular continuous iron core which can be utilized to draw power from the power line to power the device 11 and/or for measuring electrical properties for the power line, such as magnetic field strength, frequency, load current, fault current, harmonic currents and voltage quality.
The housing 12 further includes a recess at the lower edge of the housing to accommodate further elements for the device 11, such as power supply means 21, in the form of e.g. batteries or solar cells, or piezoelectric elements or accelerometers for measuring and utilizing energy.
The recess at the lower edge of the housing 12 can also be utilized for accommodating a printed circuit board 22 for controlling the device 11.
The recess is preferably sealed from the environment with a window 23 or cover. It is further preferably arranged a gasket between the window 23 and housing 12 for making the device 11 watertight. The batteries can be exchangeable batteries, so that the device needs to be brought down from the power line each time batteries are to be exchanged or they can be rechargeable, which can be recharged in several ways, e.g. by that the device 11 draws power from the power line it is connected to, by means of arrangement of solar cells to device or by means of other obvious ways for a skilled person.
The device according to the present invention further includes means for grounding in the form of a conductive layer 24 arranged to the housing 12, which conductive layer 24 is connected to the fixed iron core 18a by means of a grounding cable 25, which also is shown in Figure 3a. In this way it is created a reference point for current measurement in the device 11.
The device according to the invention further includes means for measuring current in the form of a printed circuit board 26 for current measurement, and provided with means for measuring temperature of the power line, vibrations, load current or similar. An example of such means for measuring vibrations is an IR sensor 27 which can measure temperature of the power line, an accelerometer for measuring vibrations, etc.
Reference is now made to Figure 3a which shows the device 11 seen from one side of the device 11, which side lies to the left in Figures la and 2, where the end cover 17a is removed for disclosing details of the device 11. As can be seen from the figure is the left part of the device 11 adapted for accommodating the fixed iron core 18a, which as mentioned has a mainly circular shape and extends between the ends of the opening formed by the recess 14a, while the movable iron core part 18b is arranged for moving in and out of the opening of the fixed iron core 18a, as indicated by the arrow A, for allowing insertion of a power line. This means that the movable iron core part 18b moves in direction of the opening of the recess 14a, so that it is provided an opening all the way from outside of the device 11 and to the interior of the iron core.
Reference is now made to Figure 3 which shows the device 11 seen from one side of the device 11, which side lies to the right in Figures la and 2, where the end cover 17b is removed for disclosing details of the device 11. As can be seen from the figure the right part of the device is adapted for accommodating means for current measurement, in the example in the form of a printed circuit board 26 adapted for current measurement, which printed circuit board 26 preferably has a mainly circular shape and is provided with an opening which face out towards the recess 14b so that a power line can be inserted therein. The figure also shows a preferable location of an IR sensor 27 for measuring temperature of the power line.
The device 11 preferably further includes non-conducting means 28 in the form of rubber pads or similar arranged in upper part of the recesses 14a-b to provide friction against the power line so that the device does not slide along the power line when it is exposed to nature forces, such as wind and ram.
The device further includes communication means (not shown) between one or more of: - devices 11 arranged on separate power lines, - devices 11 arranged on the same power line,
- device 11 and base unit,
- device 11 and control unit,
- device 11 and a central unit.
The communication means can e.g. be long-distance or short-distance radio, Bluetooth communication, infrared communication, traditional GSM communication or similar.
In this way the device 11 can communicate measuring signals in to a central unit directly or via other devices or base units (if the distance is too long for direct communication).
Reference is now made to Figure 4a which shows a device 11 arranged in a unit according to the invention for mounting and dismounting of the device 11 to/from a power line.
Reference is now made to Figures 4b and 4c which show details of the unit for mounting and dismounting the device 11 to a power line by means of a suitable rod, preferably a WUV-rod, seen in perspective from above and below, respectively. The unit includes a mounting basket 30 adapted to the device 11, i.e. the housing 12, which mounting basket 30 according to a first embodiment is formed by two mainly U-shaped elements 31, 32 which extend in longitudinal direction and width direction, respectively, and vertical direction of the mounting basket 30. The U-shaped element 31 is adapted to the length and width of the device 11, as shown in Figure 4a, and forms the base of the mounting basket 30. The U-shaped element 32 extends in the width direction of the mounting basket 30 and exhibits sides 33a-b having elastic properties for allowing the device 11 to be retained, as shown in Figure 4a, with sufficient force for mounting and dismounting, and at the same time the force is not larger than that the device 11 can be released from the mounting basket 30 after mounting, and that the device 11 in a simple manner can be attached to the mounting basket 30 when the device 11 is to be demounted from the power line. The mounting basket 30 further includes connection means at the bottom of the U-shaped element 31 for connection to a rod or similar (not shown), preferably a WUV-rod, which can be used to bring the device 11 up to a power line and mounting the device 11 to the power line, and dismounting of this.
The unit 30 preferably further includes means 35 for discharging voltage in the form of dischargers are arranged protruding up from the elastic sides of the U-shaped element 32. In this way one ensures that surface voltages on the power line do not damage the device 11 in connection with mounting and dismounting.
Reference is now made to Figures 5a-b which show an alternative embodiment of the unit for mounting and dismounting of the device 11. The unit is in this embodiment provided with a mounting basket 30 formed by one part having a shape adapted to the device 11, i.e. the housing 12 of the device. It is further at the longitudinal sides of the mounting basket 30 arranged fastening means 36, preferably arranged at each longitudinal side of the mounting basket 30, for retaining the device 11 securely in the mounting basket 30 in connection with mounting and dismounting. The fastening means 36 are preferably spring-loaded, so that a device 11 in a simple manner can be attached to the mounting basket 30 in connection with fastening of the device 11 to a power line and in a simple manner be released from the mounting basket 30 after a device 11 is fastened to a power line, and retaining the device securely as mentioned above.
Also this embodiment is provided with connection means 34 at the bottom of the mounting basket 30 for arrangement of a rod or similar, preferably a WUV-rod, for bringing the device 11 up to a power line.
Also this embodiment can be provided with means 35 for discharging voltage in the form of dischargers which are arranged protruding up from the fastening means 36 or at other suitable places.
It should be mentioned that it is a great advantage that the weight of the mounting basket 30 is as low as possible as this will make the mounting and dismounting simpler when the distance up to the power line is long.
By means of the unit for mounting and dismounting the device 11 can be mounted to a power line by that an installer stands on the ground below the power line. The device 11 is attached to the unit, i.e. mounting basket 30 and retained by the U-shaped element 32 or the spring-loaded fastening means 36, after which the device 11 is brought up to the power line by means of e.g. a WUV-rod. The device 11 is brought in contact with the power line by that the device 11 is held across the power line, so that the power line is inserted into the recess 13 of the device 11. When the device 11 is in contact with the power line the device 11 is turned 90 degrees clockwise or counterclockwise, dependent of the direction of the device, so that the power line is inserted into the recesses 14a and 14b. For making it easier to know which direction one should turn the device 11 it is preferably arranged arrows at the bottom of the housing 12 of the device 11, as shown in Figure lc, and possibly at the bottom of the mounting basket 30, which shows which direction the device 11 is to be turned for fastening to the power line or turned for being released from the power line The movable part 18b of the iron core is here preferably set in a position so that it allows insertion of the power line in the iron core 18. The same movement results in that means 16, if present, for retaining the device 11 to the power line, e.g. a spring-loaded element 16, is pushed down so that a force is built up in the spring-loaded element 16 which presses the device 11 against the power line. The same movement also results in that the movable part of the iron core 18b is moved into contact with the fixed iron core 18a, so that the iron core is complete. After that the mounting basket 30 is released from the device 11 by that the mounting basket 30 is applied a force directed downwards, seen from the plane of the power line, which results in that the device 11 is released from the fastening means 36 or elastic U-shaped element 32.
If the device is to be brought down from a power line the mounting basket 30 is brought in contact with the device 11, after which an upwards directed force is applied to the mounting basket 30 so that the mounting basket 30 is attached to the device via the fastening means 36 or elastic U-shaped element 32. Next the mounting basket 30 and device 11 is turned 90 degrees clockwise or counterclockwise, dependent of the direction of the device 11 and as indicated by the arrows under the device 11, so that the power line is moved out of the recesses 14a and 14b, to a position for the device 11 which is across the power line, so that the device 11 is free from the power line. In this operation is also the iron core opened by that the movable iron core 18b is moved away from the fixed iron core 18a. The device 11 can next be lowered down.
Modifications
Under certain physical conditions, such as e.g. a certain weather type, low friction can arise between the power line and device according to the invention. The device could then turn easily around the power line. This can result in problems if the device is to be brought down by means of the mounting basket. This can be solved by that the mounting basked is provided with a guiding pin at the bottom which enters a hole adapted in the device before the upwards directed force is applied to the mounting basket.

Claims

Claims
1. Device (11) for monitoring power lines, which device (11) includes a housing (12), which has a mainly elongated tubular shape, and which device (11) is provided with means for measuring electrical and/or mechanical properties of a power line and means for communicating the measured values to a central unit, and provided with fastening means for fastening to a power line, characterized in that
the fastening means of the device (11) are shaped as recesses (14a-b), which recesses (14a-b) extend in width direction of the housing (12) of the device, at ends thereof, which recesses (14a-b) opens towards each side of the device (11).
2. Device according to claim 1, characterized in that the device (11) includes an iron core for d rawing current from the power line for powering the device (11) and/or for measuring electrical properties of the power line, which iron core surrounds the recess (14a), which iron core is formed by a fixed iron core (18a) and a movable iron core part (18b) arranged for movement in and out of the recess (14a) for allowing insertion and withdrawal of the power line from the iron core, and connecting the fixed iron core (18a) and movable iron core part (18b) to a complete iron core.
3. Device according to claim 2, characterized in that the movable iron core part (18b) is arranged to the housing (12) by means of a mainly L-shaped movable mounting bracket (19b), which is arranged for being moved with a power line when it is moved in or out of the recess (14a) and in this way open or close the iron core.
4 Device according to claim 1, characterized in that the housing (12) at one side which is facing u p is provided with an additional recess (13) which extends a given distance in longitudinal direction and width direction of the housing ( 12).
5. Device according to claim 4, characterized in that the device (11) in the recess (13) is provided with guiding elements (15a-c) shaped to guide a power line in place in the device (11) in connection with mounting.
6. Device according to claim 4, characterized in that the device (11) include means for retaining the device (11) to a power line, such as a spring-loaded element (16) arranged in the recess (13), which element (16) is movable in the vertical direction of the device (11).
7. Device according to claim 1, characterized in that the device (11) include means for current measu rement in the form of a printed circuit board (26), which printed circuit board (26) has a mainly circular shape and provided with an opening facing out towards the recess ( 14b) so that a power line can be inserted therein.
8. Device according to claim 1, characterized in that the device (11) includes non-conducting means (28) in the form of rubber pads or similar arranged in upper part of the recesses (14a-b) for providing friction against the power line so that the device does not slide when exposed for nature forces, such as wind and rain.
9. Device according to claim 2, characterized in that the device (11) includes means for grounding in the form of a conducting layer (24) arranged to the housing (12), which conducting layer (24) is connected to the iron core for providing a reference point for current measurement in the device (11).
10. Unit for mou nting and dismounting of the device according to claims 1-9 to/from a power line, which includes a mou nting basket (30) adapted to the housing (12) of the device, which mounting basket (30) is provided with means (32, 36) for retaining the device (11) in place with a given force, characterized in that:
- the mounting basket (30) is formed by mainly U-shaped elements (31, 32), where one of the U- shaped elements (31) extends in the longitudinal direction and vertical direction of the mounting basket (30) and the other U-shaped element (32) extends in width direction and vertical direction of the mounting basket (30), or
- the mounting basket (30) is formed by one part with a shape adapted to the housing (12) of the device, and that it at longitudinal sides of the mounting basket (30) is arranged spring-loaded fasten ing means (36) for retaining the device (11) securely in place in the mounting basket (30) in connection with mounting and dismounting.
11. U nit according to claim 10, characterized in that the U-shaped element (31) is adapted to the length and width of the device (11) and forms a base of the mounting basket (30), and that the U- shaped element (32) extends in width direction of the mounting basket (30) and exhibits sides (33a-b) with elastic properties for retaining the device (11) in place with adequate force in connection with mounting and dismounting of the device (11) to/from a power line.
12. Unit according to claim 10, characterized in that the unit includes means (35) for discharging voltage arranged to the mounting basket (30).
13. Unit according to claim 10, characterized in that the unit includes connection means (34) at bottom of the mounting basket (30) for connection to a rod or similar, such as a WUV-rod, which can be used for bringing the device up to a power line for mounting of the device (11) to a power line, and dismounting of this from the power line.
PCT/NO2012/050236 2011-11-25 2012-11-26 Device for monitoring power lines and unit for mounting and dismounting of this to power lines WO2013077746A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20111632A NO333206B1 (en) 2011-11-25 2011-11-25 Device for monitoring power lines and device for mounting and dismantling it for power lines.
NO20111632 2011-11-25

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WO2013077746A2 true WO2013077746A2 (en) 2013-05-30
WO2013077746A3 WO2013077746A3 (en) 2013-07-18

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015157296A1 (en) * 2014-04-11 2015-10-15 Thomas & Betts International, Llc Laminate structure and clamping mechanism for faulted circuit indicator
CN107499188A (en) * 2017-09-05 2017-12-22 中铁第勘察设计院集团有限公司 Contact net additive wire monitoring device
CN113160528A (en) * 2021-02-24 2021-07-23 郑州龙华机电工程有限公司 Power equipment fault monitoring alarm device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5341088A (en) * 1984-06-22 1994-08-23 Davis Murray W System for rating electric power transmission lines and equipment
US20080088299A1 (en) * 2006-10-12 2008-04-17 Gregory Robert Wolfe Attachment device and method for fastening electrical cable monitoring instruments to electrical cables
US20100013457A1 (en) * 2008-07-18 2010-01-21 Tollgrade Communications, Inc. Power Line Takeoff Clamp Assembly
US20100085036A1 (en) * 2007-11-02 2010-04-08 Cooper Technologies Company Overhead Communicating Device
JP2011122939A (en) * 2009-12-10 2011-06-23 Kagoshima Univ Wireless sensor node and overhead wire monitoring system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5341088A (en) * 1984-06-22 1994-08-23 Davis Murray W System for rating electric power transmission lines and equipment
US20080088299A1 (en) * 2006-10-12 2008-04-17 Gregory Robert Wolfe Attachment device and method for fastening electrical cable monitoring instruments to electrical cables
US20100085036A1 (en) * 2007-11-02 2010-04-08 Cooper Technologies Company Overhead Communicating Device
US20100013457A1 (en) * 2008-07-18 2010-01-21 Tollgrade Communications, Inc. Power Line Takeoff Clamp Assembly
JP2011122939A (en) * 2009-12-10 2011-06-23 Kagoshima Univ Wireless sensor node and overhead wire monitoring system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015157296A1 (en) * 2014-04-11 2015-10-15 Thomas & Betts International, Llc Laminate structure and clamping mechanism for faulted circuit indicator
US9915680B2 (en) 2014-04-11 2018-03-13 Thomas & Betts International Llc Laminate structure and clamping mechanism for faulted circuit indicator
CN107499188A (en) * 2017-09-05 2017-12-22 中铁第勘察设计院集团有限公司 Contact net additive wire monitoring device
CN113160528A (en) * 2021-02-24 2021-07-23 郑州龙华机电工程有限公司 Power equipment fault monitoring alarm device
CN113160528B (en) * 2021-02-24 2022-07-22 郑州龙华机电工程有限公司 Power equipment fault monitoring alarm device

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NO20111632A1 (en) 2013-04-08
NO333206B1 (en) 2013-04-08

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