The P632 features an inverse-time overcurrent protection function (IDMT protection). The measured variables to be monitored by the respective IDMT function are selected by a setting parameter.

Phase current values as well as negative-sequence and residual current measured values are monitored.

The function group IDMT1 will serve as an example to illustrate the operation of the IDMT protection functions. The same will apply to function group IDMT2.