40 100 40 40 220t ms ms ms ms msD ³ + + + =EQUATION1266 V1 EN-US (Equation 37)where it is considered that:the operate time of overcurrent protection B1 is 40 msthe breaker open time is 100 msthe resetting time of protection A1 is 40 ms andthe additional margin is 40 ms8.2 Directional residual overcurrent protection, foursteps EF4PTOC IP14509-1 v88.2.1 IdentificationM14881-1 v6Function description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberDirectional residual overcurrentprotection, four stepsEF4PTOC 4(IN>)4 alt4TEF-REVA V2 EN-US51N_67N8.2.2 Setting guidelines IP14988-1 v1M15282-3 v12When inverse time overcurrent characteristic is selected, theoperate time of the stage will be the sum of the inverse time delayand the set definite time delay. Thus, if only the inverse time delayis required, it is important to set the definite time delay for thatstage to zero.The parameters for the four step residual overcurrent protection are set via the localHMI or PCM600. The following settings can be done for the function.Common base IED values for the primary current (IBase), primary voltage (UBase)and primary power (SBase) are set in global base values for settings functionGBASVAL.GlobalBaseSel: Selects the global base value group used by the function to defineIBase, UBase and SBase as applicable.Section 8 1MRK 511 407-UEN CCurrent protection134 Phasor measurement unit RES670 2.2 IECApplication manual
