Circuit arrangement for a corrosion protection current feed and for a line test for two-wire lines
US7365547B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 2006 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | Apr 18, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F13/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A circuit arrangement for a line test and for feeding a corrosion protection current into a two-wire line comprises a controllable ramp generator for producing a ramp voltage, at least one first test impedance to be connected to a first line of a two-wire line, at least one second test impedance to be connected to a second line of the two-wire line, at least one first and second controllable switches for connecting the ramp voltage to the first and second test impedances, and a programmable control device for controlling the ramp generator and the first and second controllable switches in such a way so that the ramp voltage is coupled to the two-wire line in order to produce a corrosion protection current. The control device switches at least one of the first and second test impedances to the respective of the first and second lines for a line test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.