Source: http://www.google.com/patents/US6756776?dq=6272333
Timestamp: 2017-03-24 17:00:41
Document Index: 137313724

Matched Legal Cases: ['art 110', 'art 120', 'art 110', 'art 120', 'art 110', 'art 120', 'art 110', 'art 120', 'art 110', 'art 120', 'arts 110', 'art 110', 'art 120', 'art 110', 'art 120', 'arts 110', 'arts 110', 'arts 110', 'arts 110', 'art 224', 'art 204', 'arts 110']

Patent US6756776 - Method and device for installing and removing a current transformer on and ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA current transformer to be installed around a current-carrying conductor. The transformer has a split core with two parts, which can be opened to allow the transformer to be installed around or removed from the current-carrying conductor. A winding wound on the core is operatively connected to a switch...http://www.google.com/patents/US6756776?utm_source=gb-gplus-sharePatent US6756776 - Method and device for installing and removing a current transformer on and from a current-carrying power lineAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS6756776 B2Publication typeGrantApplication numberUS 10/293,729Publication dateJun 29, 2004Filing dateNov 12, 2002Priority dateMay 28, 2002Fee statusLapsedAlso published asEP1508146A2, US20030222747, WO2003100797A2, WO2003100797A3Publication number10293729, 293729, US 6756776 B2, US 6756776B2, US-B2-6756776, US6756776 B2, US6756776B2InventorsJoseph C. Perkinson, Scott D. BrownOriginal AssigneeAmperion, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (11), Referenced by (50), Classifications (9), Legal Events (10) External Links: USPTO, USPTO Assignment, EspacenetMethod and device for installing and removing a current transformer on and from a current-carrying power line
US 6756776 B2Abstract
What is claimed is: 1. A method of reducing magnetic forces exerted on a current transformer (90) positioned about a current-carrying conductor (5), wherein the current transformer (90) comprises a magnetically permeable core (100) having at least two split core parts (110, 120) separable by a gap (130), and wherein
the gap can be closed so as to allow the split core parts to form a substantially closed-loop around the current-carrying conductor in a closed configuration, and the gap can be widened so as to allow the current transformer to be removed from the current-carrying conductor, and wherein the current transformer further comprises a winding (140) having a plurality of turns of an electrical conductor wound around the magnetically permeable core, said method comprising the steps of: shorting the winding prior to closing the gap between the split core parts for achieving the closed configuration; and shorting the winding prior to separating the split core parts from each other if the split core parts are in the closed configuration. 2. The method of claim 1, further comprising the step of
opening the winding after the split core parts are in the closed configuration. 3. The method of claim 2, further comprising the step of
opening the winding after the split core parts are separated from each other. 4. The method of claim 1, further comprising the step of
opening the winding after the split core parts are separated from each other. 5. A device for reducing magnetic forces exerted on a current transformer (90) positioned about a current-carrying conductor (5), wherein the current transformer comprises a magnetically permeable core (100) having at least two split core parts (110, 120) separable by a gap (130), and wherein
the gap can be closed so as to allow the split core parts to form a substantially closed-loop around the current-carrying conductor in a closed configuration, and the gap can be widened so as to allow the current transformer to be removed from the current-carrying conductor, and wherein the current transformer further comprises a winding having a plurality of turns of an electrical conductor wound around the magnetically permeable core, said device comprising: a shorting device (192) in operative engagement with the winding (140) so as to be able to short the winding; and a mechanism (194), positioned relative to the split core parts so as to be able to close the gap between the split core parts or to separate the split core parts from each other. 6. The device of claim 5, wherein the mechanism is operatively connected to the shorting device so as to cause the shorting device to short the winding prior to closing the gap, and to short the winding prior to separating the split core parts from each other if the split core parts are in the closed configuration.
a magnetically permeable core (100) having at least two split core parts (110, 120) separable by a gap (130), wherein the gap can be closed so as to allow the split core parts to form a substantially closed-loop around the current-carrying conductor in a closed configuration, and the gap can be widened for separating the split core parts from each other so as to allow the current transformer to be removed from around the current-carrying conductor; a winding (140) having a plurality of turns of an electrical conductor wound around the magnetically permeable core; and a shorting device (192) positioned relative to the winding so as to be able to: short the winding prior to closing the gap, and to be able to short the winding prior to separating the split core parts if the split core parts are in the closed configuration. 11. The current transformer of claim 10, further comprising
a mechanism (194), positioned relative to the split core parts so as to be able to close the gap between the split core parts or to separate the split core parts from each other. 12. The current transformer of claim 11, wherein the mechanism is operatively connected to the shorting device so as to cause the shorting device to short the winding.
13. The current transformer of claim 12, wherein the mechanism is adapted to cause the shorting device to open the winding after the gap is closed.
14. The current transformer of claim 12, wherein the mechanism is adapted to cause the shorting device to opening the winding after the split core parts are separated from each other.
15. The current transformer of claim 10, wherein the shorting device is able to open the winding after the gap is closed.
16. The current transformer of claim 10, wherein the shorting device is able to open the winding after the split core parts are separated from each other.
This application claims the benefit of U.S. Provisional Application(s) No(s).: application Ser. No. 60/383,833 filing date May 28, 2002
FIG. 1 is a schematic representation showing a power line communications network.
FIG. 2 is a schematic representation showing a current transformer and a device for shorting the winding of the current transformer, according to the present invention.
FIG. 3 is a schematic representation showing another embodiment of the current transformer.
FIG. 4a is a schematic representation showing a split core for use in a current transformer of FIG. 2, wherein the split core is in an open position.
FIG. 4b is a schematic representation showing the split core of FIG. 4a in a closed position.
FIG. 4c is a schematic representation showing another embodiment of the split core, according to the present invention, wherein the split core is in an open position.
FIG. 4d is a schematic representation showing the split core of FIG. 4c in a closed position.
FIG. 5a is a schematic representation showing a split core for use in a current transformer of FIG. 3, wherein the split core is in an open position.
FIG. 5b is a schematic representation showing the split core of FIG. 5a in a closed position.
FIG. 6 is a schematic representation showing a housing of the split core.
FIG. 4a is a schematic representation showing the split core 100 of the current transformer 90 of FIG. 2. As shown, the winding 140 is partially wound on the first split core part 110 and partially on the second split core part 120. The first split core part 110 has a first end 112 and a second end 114. The second split core part 120 has a first end 122 and a second end 124. When the split core 100 is in an open position, the first end 112 of the first split core part 110 and the first end 122 of the second split core part 120 form a gap 130. Likewise, the second end 114 of the first split core part 110 and the second end 124 of the second split core part 120 form a gap 132. When the first split core part 110 and the second split core part 120 are put together around the power line 5 to form a substantially closed loop transformer core, as shown in FIG. 4b, the spatially nonlinear magnetic field near the surface of the conductor 5 will exert a force on the first and second core parts 110 and 120. This force increases rapidly as the gaps 130 and 132 are reduced.
FIG. 5b is a schematic representation showing the split core 100 of the current transformer 90 of FIG. 3. Advantageously, the secondary winding 140 is wound on the first split core part 110, and the further secondary winding 150 is wound on the second split core part 120. When the first split core part 110 and the second split core part 120 are put together around the power line 5 to form a substantially closed loop transformer core, as shown in FIG. 5b, the spatially nonlinear magnetic field near the surface of the conductor 5 will exert a force on the first and second core parts 110 and 120. This force increases rapidly as the gaps 130 and 132 are reduced. As described in conjunction in FIG. 3, the force can be reduced or eliminated by shorting the ends 142, 144 of the secondary winding 140. In this embodiment, the winding ends 152 and 154 of the further secondary winding 150 are not affected by the opening or closing of the split core parts 110, 120. After installation is completed and the split core parts 110, 120 are in the “closed” position, the shorting between the ends 142, 144 is removed, as shown in FIG. 5b. In order to facilitate the opening and closing of the split core 100, the split core parts 110 and 120 are separately disposed in the first half 202 and the second half 204 of the housing 200. The housing 200 has a hinge 210 to keep the two halves 202 and 204 together so that the split core 100 can be operated in the open or closed position as shown in FIGS. 4a to 5 b. The housing 200 also has a latching mechanism to keep the two halves 202, 204 in a locked position when the split core 100 is operated in the closed position. The latching mechanism comprises a hook 222 on the first half 202 to be engaged with a counterpart 224 of the second part 204, for example. As shown, the hinge 210 is mechanically engaged with the control assembly 190 so as to allow the mechanical tool 194 to cause the split core parts 110, 120 to open or to close.
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2012REMIMaintenance fee reminder mailedJun 28, 2012SULPSurcharge for late paymentYear of fee payment: 7Jun 28, 2012FPAYFee paymentYear of fee payment: 8Feb 5, 2016REMIMaintenance fee reminder mailedJun 29, 2016LAPSLapse for failure to pay maintenance feesAug 16, 2016FPExpired due to failure to pay maintenance feeEffective date: 20160629RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services