Konti–Skan (also known as Kontiskan) is the name of high-voltage direct-current transmission line between Denmark and Sweden. Technical description Kontiskan is a bipolar HVDC scheme. Pole 1 (Kontiskan 1) was originally built in 1965, using mercury arc valves and was able to transmit up to 250 megawatts (MW) of power with an operating voltage of 250 kV. The original mercury arc scheme was taken out of operation and disconnected on 15 August 2006, being replaced by new equipment using thyristors with a power rating of 350 MW. Pole 2, the 1988-built Kontiskan 2, was built with thyristors from the outset and can transmit 300 MW with a voltage of 285 kV. Route On the Danish side, the converter station used as well by Konti–Skan 1 and 2 is close to Vester Hassing near Aalborg. From Vester Hassing a long overhead line with two conductors runs to the cable terminal at the Danish coast near Stensnæs. This line, which is only in the proximity of the converter station and the cable terminal equipped with a ground conductor, was originally used by the high voltage pole of Konti–Skan 1 and from Vester Hassing until a point a few kilometres south of the cable terminal by the electrode line, which turned there eastwards to the ground electrode at Soera. At implementation of Konti–Skan 2 the whole overhead electrode line was replaced by two long underground cables and the second conductor of the overhead line got the high-voltage pole of Konti–Skan 2. The long submarine cable to the Danish island of Læsø starts at Stensnæs and consists of 3 parallel cables. Each of these cables has two copper conductors with a copper cross section of 310 square millimeters. One of these cables was used by Kontiskan 1 and one is used by Kontiskan 2. From the third cable, one conductor was used by Kontiskan 1 and the other is used by Kontiskan 2. Konti–Skan crosses Læsø on a long overhead line with two conductors. Before the implementation of Konti–Skan 2 both conductors were switched parallel, today one conductor is used for the high voltage pole of Konti–Skan 1, while the other is used by that of Konti–Skan 2. Between Læsø and Sweden each high voltage pole of Konti–Skan uses a monopolar copper cable with a cross section of 1200 square millimetres. From the Swedish coast a long overhead power line ran to the original