Har Cables low-voltage and medium-voltage
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CABLES Har Cables low-voltage and medium-voltage
When sending power down a transmission line, it is usually desirable that as much power as possible will be absorbed by the load and as little as possible will be reflected back to the source. This can be ensured by making the load impedance equal to Z0, in which case the transmission line is said to be matched. Ensuring the source impedance matches Z0 will maximize power transfer from the source to the transmission line, but has no other effect on the behavior of the line. Har Cables low-voltage and medium-voltage
Some of the power that is fed into a transmission line is lost because of its resistance. This effect is called ohmic or resistive loss (see ohmic heating). At high frequencies, another effect called dielectric loss becomes significant, adding to the losses caused by resistance. Dielectric loss is caused when the insulating Har Cables low-voltage and medium-voltage material inside the transmission line absorbs energy from the alternating electric field and converts it to heat (see dielectric heating).