User manual 09/2009 - Schneider Electric

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User manual 09/2009 - Schneider Electric

Using Micrologic Trip UnitsExample of Presetting a Protection Parameter Using a DialThe table below illustrates presetting and setting the long time protection Ir pick-up on a Micrologic tripunit 5.2 rated 250 A:Step Action Using Display1 Set the Ir dial to the maximum value(the padlock unlocks automatically).The down arrows indicate all 3phases (the setting is identical oneach phase).2 Turn the Ir dial to the setting abovethe value required.3 Presetting is complete:• If the pick-up setting value is correct, exit the setting procedure (no validation is required).The long time protection Ir pick-up is set at 175 A.• If the pick-up setting value is not suitable, fine-tune it on the keypad.4 Set the exact value requested for Iron the keypad (in steps of 1 A).5 Validate the setting (the OKpictogram blinks).OK6 Confirm the setting (the confirmationOK is displayed for 2 s).OKLV434104 09/2009 25

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