Defrosting

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The defrost circuit is used to de-icing overhead lines .

So much electrical current is conducted for a short time over icy overhead lines that they heat up due to the specific resistance of the electrical conductor . In Canada, DC voltage is also used for de-icing overhead lines, as is the case with the Lévis de-icer .

One way of defrosting overhead lines is to feed in higher-frequency alternating current (less than 10 kHz) via capacitors . However, there are no such systems in Germany.

Individual evidence

1. ↑ Investigation report on the supply disruptions in the network area of ​​the RWE in Münsterland from November 25, 2005. Federal Network Agency for Electricity, Gas, Telecommunications, Post and Railways, June 2006, accessed on April 29, 2020 .