Direct current voltage switch for switching a direct current in a branch of a direct current voltage network node
US9882371B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 2012 |
| Grant date | Jan 30, 2018 |
| Priority date | — |
| Expiry date | Nov 27, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/596
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device switches a direct current in a branch of a direct current voltage network node. The device contains a constant current path extending between two connection terminals, in which a mechanical switch is disposed. The device further has a switching current path bridging the constant current path and a power switching unit is disposed therein. The power switching unit has power semiconductor switches which can be switched on and off and configured to interrupt a short-circuit current in the event of a fault. The device contains a longitudinal voltage source for generating a counter-voltage in a loop formed by the constant current path and the switching current path. The device can be used economically over long periods of time to control the load flow on a network node. Accordingly, the longitudinal voltage source has a circuit for connecting and disconnecting the electrical power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.