Thermal withstand lime

Generally, depending upon the type of load, different nianiifaclurcrs may adopt to different design practices, such as high r, and low thermal withstand lime or moderate T, and high thermal withstand time. 

Note A similar situation may be found in an aulomalic Y/A starter when the setting of the timer, to changeover from star to della, is al a higher value lo allow a longer starling lime to pick up speed. Then also the motor wotild meet the same fate if the starting time exceeded the thermal withstand time of the motor. 

---