In the P632, a three-stage definite-time overcurrent protection function (DTOC protection) is available. The measured values to be monitored by the respective DTOC functions are selected using a setting parameter.

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

The function group DTOC1 will serve as an example to illustrate the operation of the DTOC protection functions. The same will apply to function group DTOC2.