100223 IBaseIIEQUATION1520 V5 EN-US (Equation 126)where:I2 is the maximal negative sequence current during normal operating conditions, plus a marginof 10...20%IBase is the base current for the function according to the settingGlobalBaseSel11.2.3.4 Zero sequence based M13683-43 v8The IED setting value 3U0> is given in percentage of the base voltage UBase. Thesetting of 3U0> should not be set lower than the value that is calculated accordingto equation 127.10030303 UBaseUUEQUATION1521 V4 EN-US (Equation 127)where:3U0 is the maximal zero sequence voltage during normal operation conditions, plus a margin of10...20%UBase is the base voltage for the function according to the settingGlobalBaseSelThe setting of the current limit 3I0< is done in percentage of IBase. The setting of3I0< must be higher than the normal unbalance current that might exist in thesystem. The setting can be calculated according to equation 128.3 03 0 100II IBase= ×<EQUATION2293 V3 EN-US (Equation 128)where:3I0< is the maximal zero sequence current during normal operating conditions, plus a margin of10...20%IBase is the base current for the function according to the settingGlobalBaseSel11.2.3.5 Delta U and delta I GUID-02336F26-98C0-419D-8759-45F5F12580DE v7Set the operation mode selector OpDUDI to On if the delta function shall be inoperation.1MRK 505 393-UEN B Section 11Secondary system supervisionLine differential protection RED650 2.2 IEC 213Application manual
