Superconductors - Unendingly current    

Superconductors don't have electrical resistance unlike metallic conductors like aluminum or copper. By the resistance a metallic conductor is heating up as soon as a current runs. This loss by the resistance can be at electrical lines depending on length and voltage level up to 7%. The resistance of superconductors is infinitely small.

If so the current doesn't have any resistance, it can get infinitely high after the law of Ohm!

In the practice one can make the following comparison:


A service connection with 63 amps concerning VDE norm needs a copper cable with a 16 mm2 crosscut. A superconductor of PerCoTech needs only 0.006 mm2 crosscut (2,6‰ of the copper crosscut) for the same current. This results not just material savings, but additional savings of electrical resistance losses due to the substitution of the copper wire.

It is the disadvantage of superconductors that they lose its resistance only at temperatures below 90K. Meantime established, long-lasting cryo-technology is available. Once the superconductor is cooled down, only isolation losses must be compensated. Therefore this makes superconductive techniques economic particularly there, where big performances have to be realized or large amounts of energy must be transported.


PerCoTech AG . Bienroder Weg 53 . 38108 Braunschweig . Telefon: 0531 - 391 9424 .
E-Mail: 1st.contact@percotech.de . Internet: www.percotech.de

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Superconductors - Unendingly current    

Superconductors don't have electrical resistance unlike metallic conductors like aluminum or copper. By the resistance a metallic conductor is heating up as soon as a current runs. This loss by the resistance can be at electrical lines depending on length and voltage level up to 7%. The resistance of superconductors is infinitely small.

If so the current doesn't have any resistance, it can get infinitely high after the law of Ohm!

In the practice one can make the following comparison:


A service connection with 63 amps concerning VDE norm needs a copper cable with a 16 mm2 crosscut. A superconductor of PerCoTech needs only 0.006 mm2 crosscut (2,6‰ of the copper crosscut) for the same current. This results not just material savings, but additional savings of electrical resistance losses due to the substitution of the copper wire.

It is the disadvantage of superconductors that they lose its resistance only at temperatures below 90K. Meantime established, long-lasting cryo-technology is available. Once the superconductor is cooled down, only isolation losses must be compensated. Therefore this makes superconductive techniques economic particularly there, where big performances have to be realized or large amounts of energy must be transported.