Fig. 2 shows the ac losses as function of transport
currents for the one-phase HTS cable. The
white circle indicates the measurement. TEPCO
and SEI measured the loss using the calorimetric
method. The measured loss is almost equal to the
calculation Wtot. In our calculation, we consider
the applied fields generated by layer currents.
Therefore we use the Carr and Magnusson equations
to calculate the layer losses. As a result, the
property of the losses versus transport currents is
shaped like a parabola, as show in Fig. 2. If the
applied field is not considered, the shape of the
property becomes straight and below the measurement,
which is like the property of Wself and
the loss is 0.14 W/m/ph with a transport current of
1 kArms. WBc is a major component in Wtot at a low
current region. The WBa is very small and can be
negligible in Wtot. Investigating a distribution of
each layer loss as function of transport currents,
the layer loss has a peak at layer number 4. With