Source: https://patents.google.com/patent/US6756776
Timestamp: 2018-03-20 06:12:34
Document Index: 376626289

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

US6756776B2 - Method and device for installing and removing a current transformer on and from a current-carrying power line - Google Patents
US6756776B2
US6756776B2 US10293729 US29372902A US6756776B2 US 6756776 B2 US6756776 B2 US 6756776B2 US 10293729 US10293729 US 10293729 US 29372902 A US29372902 A US 29372902A US 6756776 B2 US6756776 B2 US 6756776B2
US20030222747A1 (en )
Joseph C. Perkinson
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.
US20030222747A1 true US20030222747A1 (en) 2003-12-04
US6756776B2 true US6756776B2 (en) 2004-06-29
EP2587602A2 (en) * 2005-01-31 2013-05-01 Georgia Tech Research Corporation Active current surge limiters with watchdog circuit
CN102222559B (en) * 2010-04-13 2013-02-13 徐其信 Split current mutual inductor
US20160225520A1 (en) * 2015-02-02 2016-08-04 Electrical Grid Monitoring Ltd. Device and method for releasing a magnetic core mounted around a current carrying electric conductor
US4390813A (en) 1981-06-29 1983-06-28 Litek International Inc. Transformer for driving Class D amplifier
US20030222747A1 (en) 2003-12-04 application