5-234 M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUALGROUPED ELEMENTS CHAPTER 5: SETTINGS5Figure 5-130: Underpower logic5.7.6 Phase current5.7.6.1 MenuSETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) PHASE CURRENT5.7.6.2 Inverse TOC curve characteristicsThe inverse time overcurrent curves used by the time overcurrent elements are the IEEE, IEC, GE Type IAC, and I2 t standardcurve shapes. This allows for simplified coordination with downstream devices.If none of these curve shapes is adequate, FlexCurves can be used to customize the inverse time curve characteristics. Thedefinite time curve is also an option that can be appropriate if only simple protection is required.Table 5-25: Overcurrent curve types PHASE CURRENT PHASE TOC1See page 5-240 PHASE TOC6 PHASE IOC1See page 5-242 PHASE IOC12 PHASE DIRECTIONAL 1See page 5-243 PHASE DIRECTIONAL 2IEEE IEC GE type IAC OtherIEEE Extremely Inverse IEC Curve A (BS142) IAC Extremely Inverse I 2 t
