For ANSI inverse time delay characteristics all three types of reset time characteristics areavailable; instantaneous (1), IEC (2 = set constant time reset) and ANSI (3 = current dependentreset time).For IEC inverse time delay characteristics the possible delay time settings are instantaneous (1)and IEC (2 = set constant time reset).For the programmable inverse time delay characteristics all three types of reset timecharacteristics are available; instantaneous (1), IEC (2 = set constant time reset) and ANSI (3 =current dependent reset time). If the current dependent type is used settingspr,tr andcr must begiven.tPCrvx,tACrvx,tBCrvx,tCCrvx: Parameters for programmable inverse time characteristic curve.The time characteristic equation is according to equation 45:[ ] pAt s B TDi Cipickup= + ×-æ öç ÷ç ÷ç ÷æ öç ÷ç ÷è øè øEQUATION1722 V1 EN-US (Equation 45)Further description can be found in the Technical reference manual (TRM).tPRCrvx,tTRCrvx,tCRCrvx: Parameters for customer creation of inverse reset time characteristiccurve. Further description can be found in the Technical Reference Manual.7.5.3.2 Common settings for all steps GUID-A00A942B-E760-42EE-8FEB-F723426783F3 v1x means step 1, 2, 3 and 4.AngleRCA: Relay characteristic angle given in degrees. This angle is defined as shown in figure 74.The angle is defined positive when the residual current lags the reference voltage (Vpol = -)1MRK 511 358-UUS A Section 7Current protection153Application manual
