Leakage protection method and device having live/neutral wire identification function
US9941685B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Feb 20, 2014 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Mar 19, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H11/002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A leakage protection method and device with live/neutral wire identification that identify live wire and neutral wire of a power supply by means of a live/neutral wire identification device, and correct live/neutral wire connections, so that a surface leakage signal pickup device is always connected to the neutral wire and to surface of the electric device, and electric potential of the surface is always monitored over the neutral wire. When the Surface leaks electricity, the leakage signal pickup device immediately drives an electromagnetic tripping device to break a main circuit switch, thereby breaking the connection between the electric device and the power source. The method and device work effectively even when the electric device is not grounded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.