User manual 09/2009 - Schneider Electric

Using Micrologic Trip UnitsNavigation PrincipleLocking/Unlocking the Protection Parameter SettingsThe protection parameter settings are locked when the transparent cover is closed and sealed to preventaccess to the adjustment dials and the locking/unlocking microswitch.A pictogram on the display indicates whether the protection parameter settings are locked:• Padlock locked : The protection parameter settings are locked.• Padlock unlocked : The protection parameter settings are unlocked.To unlock the protection parameter settings:1. Open the transparent cover2. Press the locking/unlocking microswitch or turn one of the adjustment dialsTo lock the protection parameter settings, press the unlocking microswitch again.The protection parameter settings also lock automatically 5 minutes after pressing a key on the keypador turning one of the dials on the Micrologic trip unit.Mode DefinitionThe information that can be accessed on the Micrologic display is split between different modes.The modes that can be accessed depend on:• Whether the protection parameter settings are locked• The Micrologic trip unit version (3-pole or 4-pole)A mode is defined by a combination of 5 pictograms.The tables below show all the possible modes:PictogramsMode Accessible With Padlock Locked• Instantaneous measurement readout• Kilowatt hour meter readout and resetPeak demand readout and resetProtection parameter readoutNeutral declaration readout (3-pole Micrologic trip unit)PictogramsMode Accessible With Padlock Unlocked• Instantaneous measurement readout• Kilowatt hour meter readout and resetPeak demand readout and resetProtection parameter settingNeutral declaration setting (3-pole Micrologic trip unit)Mode SelectionModeA mode is selected by successive presses on the button:• The modes scroll cyclically.• The unlocking/locking microswitch is pressed to switch from a readout mode to a setting mode (andvice versa).18 LV434104 09/2009