The motor load jam protection function JAMPTOC is used for protecting the motor in stall or mechanical jam situations during the running state.
When the motor is started, a separate function is used for the startup protection, and JAMPTOC is normally blocked during the startup period. When the motor has passed the starting phase, JAMPTOC monitors the magnitude of phase currents. The function starts when the measured current exceeds the breakdown torque level, that is, above the set limit. The operation characteristic is definite time.
The function contains a blocking functionality. It is possible to block the function outputs.