Altivar 71/61 drives display [Drv. thermal state] (tHd) in %. What is Drvive hermal state & its value.
The information drive thermal state comes from a sensor located on the heatsink. The drive thermal state has given by the parameter tHd. If tHd=118% then the fault appears and at 90% the fault disappears.
Definition of drive thermal state means that 118% of drive thermal state represent maximum temperature on the heatsink that is 100°C. Although drive thermal state reflects heatsink temperature, its dependence is not linear, see following data:
(tHd means thermal state of drive). tHd => Temperature 118% => 100°C 90% => 80°C 50% => 40°C 10% => 0°C