User manual 09/2009 - Schneider Electric

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User manual 09/2009 - Schneider Electric

Operating AssistanceAcknowledging the Trip ScreensThe trip screens are acknowledged by pressing theOKkey twice (validation and confirmation).CAUTIONRISK OF CLOSING ON ELECTRICAL FAULTDo not close the circuit breaker again without inspecting and, if necessary, repairing the downstreamelectrical equipment.Failure to follow these instructions can result in injury or equipment damage.The fact that a protection has tripped does not remedy the cause of the fault on the downstream electricalequipment.Step Action1 Isolate the feed before inspecting the downstream electrical equipment.2 Look for the cause of the fault.3 Inspect and, if necessary, repair the downstream equipment.4 Inspect the equipment (refastening of connections, etc.) in the event of a short-circuit trip.5 Close the circuit breaker again.For more information on troubleshooting and restarting following a fault, see the Compact NSX circuitbreakers - User manual.Indication on Internal Failure of the Micrologic Trip UnitScreenCauseAn internal failure on the Micrologic trip unit, whether fleeting orpermanent, has occurred without the circuit breaker tripping (thefailure does not affect the trip unit protection functions).CAUTIONRISK OF INCORRECT INFORMATIONReplace the Micrologic trip unit at the next maintenance interval.Failure to follow these instructions can result in injury or equipment damage.Acknowledging the Err ScreenOKThe Err screen is acknowledged by pressing the key twice (validation and confirmation), whichbrings up the main screen:• The measurements and settings can still be accessed with the Mode key• The Err screen becomes the main screen if the failure is permanent136 LV434104 09/2009

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