a process and a circuit arrangement are proposed for electronically monitoring the overload on electric motor drives and in the case of which process and circuit arrangement speed is . monitored in addition to the known methods for real power monitoring . this also enables monitoring of the operating state of an electric motor drive , which is subject to a load , below the nominal rotation speed . this allows monitoring of the overload not only in the case of electric motor drives in the direct - current mode but also in the pulsed mode , as well as in the case of stepping motors .