Method and apparatus for reducing the magnetic field associated with an energized power cable
US6414239B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Feb 23, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B9/003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical power cable is provided, including an elongated carrier in the form of a soft center material hollow conduit. First and second insulated power conductors are spiraled about the conduit, with the first power conductor being spiraled in one direction, and the second power conductor being spiraled in the opposite direction. Preferably, the first and second power conductors cross one another at approximately a 90° angle. When the conductors are energized under load so that current flows through the power conductors, the magnetic field associated with the cable is reduced due to a cancellation effect because the power conductors are spiraled in opposite directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.