| 摘要 |
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.
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