Method for controlling a voltage transformer for overvoltage protection, voltage transformer and operating device having a voltage transformer
US9125281B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 2010 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Nov 11, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for controlling a voltage transformer for operating a switchable load having at least one inductance and a switch, which is activated by a digital control device. When the switch is closed, a magnetizing current flows through the inductance. When the switch is open, a demagnetizing current flows through the inductance. The method comprises the steps of measuring the demagnetizing time of the inductance and, when a maximum value of the demagnetizing time of the inductance is exceeded, storing such an occurrence as a fault. The load is disconnected by the control device when a predetermined maximum frequency of faults is exceeded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.