Hi Guys, So we have a melting furnace that is melting Aluminium. After 2 days of holding a melt to see how the furnace performs in a holding situation, I changed the PID control to have a longer sampling time and hence smoother control. What I noticed was the KW seemed to drop, although the average usage was probably the same. The KVA value had a definite increas in the average value. I can post a graph of the results if anyone is interested? Can this be explained? The elements a SiC and are controlled by a thyristor card by current setting. Thanks for any help.