Hybrid MOV/gas-tube AC surge protector for building entrance
US6778375B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2000 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Feb 16, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A surge protector for single-phase or multi-phase power lines is disclosed, for permanent connection near the entrance of power lines to a building, that has a basic protector sub-circuit of a metal-oxide varistor (MOV) and a gas-discharge tube (GDT) connected in series between the power line and building ground. Preferably, the gas-discharge tube is a three-element GDT and is connected to two metal-oxide varistors. In a multi-phase implementation, the present invention includes one or more protector sub-circuits connected between each power line and ground, wherein each protector sub-circuit includes two metal-oxide varistors connected to a power line and a gas-discharge tube connected to the building ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.