Masterpact NT06-16 IEC - error

Maintaining MasterpactperformanceTroubleshooting andsolutionsProblem Probable causes Solutionscircuit breaker cannot be closed locally or remotely b circuit breaker padlocked or v disable the locking fonctionkeylocked in the "open" positionb circuit breaker interlockedmechanically in a source changeoversystemb circuit breaker not completely connectedv check the position of the othercircuit breaker in the changeoversystemv modify the situation to release theinterlockv terminate racking in (connection)of the circuit breakerb the reset button signalling a fault trip v clear the faulthas not been resetv push the reset button on the frontof the circuit breakerb stored energy mechanism not charged v charge the mechanism manuallyv if it is equipped with a an MCH gearmotor, check the supply of power tothe motor. If the problem persists,replace the gear motor (MCH)b MX opening shunt releasev there is an opening order.permanently supplied with powerDetermine the origin of the order. Theorder must be cancelled before thecircuit breaker can be closedb MN undervoltage release not supplied v there is an opening order.with powerDetermine the origin of the order.v check the voltage and the supplycircuit (U > 0.85 Un). If the problempersists, replace the releaseb XF closing release continuously v cut the supply of power to the XFsupplied with power, but circuit breaker not closing release, then send the closing"ready to close" (XF not wired in series order again via the XF, but only if thewith PF contact)circuit breaker is "ready to close"b permanent trip order in the presence of v Disable these protection functionsa Micrologic P or H control unit with on the Micrologic P or H control unitminimum voltage and minimum frequencyprotection in Trip mode and the controlunit poweredcircuit breaker cannot be closed remotely but can be b closing order not executed by the XF v check the voltage and the supplyopened locally using the closing pushbutton closing release circuit (0.85 - 1.1 Un). If the problempersists, replace the XF releaseunexpected tripping without activation of the reset b MN undervoltage release supply v check the voltage and the supplybutton signalling a fault trip voltage too low circuit (U > 0.85 Un)b load-shedding order sent to the MXopening release by another devicev check the overall load on thedistribution systemv if necessary, modify the settings ofdevices in the installationb unnecessary opening order from the v determine the origin of the orderMX opening releaseunexpected tripping with activation of the reset button a fault is present :signalling a fault trip b overload v determine and clear the causes ofb earth faultthe faultb short-circuit detected by the control v check the condition of the circuitunitbreaker before putting it back intoserviceinstantaneous opening after each attempt to close the b thermal memory v see the user manual of the controlcircuit breaker with activation of the reset buttonsignalling a fault tripb transient overcurrent when closingb closing on a short-circuitunitv press the reset buttonv modify the distribution system or thecontrol-unit settingsv check the condition of the circuitbreaker before putting it back intoservicev press the reset buttonv clear the faultv check the condition of the circuitbreaker before putting it back intoservicev press the reset button46Masterpact NT06-16 IECSchneider Electric