2ndHarmStab: Operate level of 2nd harmonic current restrain set in % of the fundamentalcurrent. The setting range is 5-100% of IBase in steps of 1%. Default setting is 20%.HarmRestrainx: Disabled/Enabled, enables blocking from harmonic restrain.7.2.3.1 Settings for each step (x = 1-4)Characteristx: Selection of time delay characteristic for step x. Definite time delay anddifferent types of inverse time delay characteristics are available according to table 28.Table 28:Inverse time delay characteristicsCurve nameANSI Extremely InverseANSI Very InverseANSI Normal InverseANSI Moderately InverseANSI/IEEE Definite timeANSI Long Time Extremely InverseANSI Long Time Very InverseANSI Long Time InverseIEC Normal InverseIEC Very InverseIEC InverseIEC Extremely InverseIEC Short Time InverseIEC Long Time InverseIEC Definite TimeUser ProgrammableASEA RIRXIDG (logarithmic)The different characteristics are described in the “Technical reference manual”.Ix>: Operation phase current level for step x given in % of IBase.tx: Definite time delay for step x. Used if definite time characteristic is chosen. Settingrange: 0.000-60.000 s in step of 0.001 s. Note that the value set is the time betweenactivation of the start and the trip outputs.kx: Time multiplier for the dependent (inverse) characteristic.Section 7 1MRK 505 337-UUS -Current protection176Application manual
