User manual 09/2009 - Schneider Electric

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User manual 09/2009 - Schneider Electric

Using Micrologic Trip UnitsMicrologic 5 LSI: Protection Parameter Setting ScreensMode Description of Screens Unit Up/Down ArrowsIr: Long time protection pick-up setting for the phasesPreset by a dialAThe up arrow indicatesthe Ir parameter.The down arrows indicatethe 3 phases.tr: Long time protection time delay setting s The up arrow indicatesthe tr parameter.Isd: Short time protection pick-up setting for the phasesPreset by a dialtsd: Short time protection time delay settingActivation of the I 2 t inverse time curve short timeprotection• ON: I 2 t inverse time curve active• OFF: I 2 t inverse time curve not activeIN: protection pick-up setting for the neutral (4-pole or 3-pole trip unit with ENCT option and active neutralprotection)Ii: Instantaneous protection pick-up value for the phasesand the neutral (4-pole or 3-pole trip unit with ENCToption and active neutral protection).Activation of neutral declaration (3-pole trip unit withENCT option):• N: Neutral protection active• noN: Neutral protection not activeIsd/IrsIN/IrIi/In— —The up arrow indicatesthe Isd parameter.The down arrows indicatethe 3 phases.The up arrow indicatesthe tsd parameter.The down arrow indicatesthe neutral.The up arrow indicatesthe Ii parameter.The down arrows indicatethe 3 phases.30 LV434104 09/2009

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