Hardware and Engineering DF6-340-... Frequency ... - Moeller.com.tr

Setting Parameters01/02 AWB8230-1413GBCurrent limitWith the current limit setting, the output current can be limited. Toreduce the load current, the frequency inverter ends the frequencyincrease in the acceleration phase or reduces the output frequencyduring static operation as soon as the output current rises abovethe current limit set with this function, (the time constant forcontrol at the current limit is defined under PNU b023 or b026). Assoon as the output current drops below the set current limit, thefrequency increases again to the configured setpoint value. Thecurrent limit can be deactivated for the acceleration phase, so thathigher currents for acceleration are allowed for brief periods(a PNU b021 or b024).With PNU b024 to b026, you can program a second current limit,which can be called up through digital input OLR (a section“Change over current limit (OLR)”, page 87).The current limit can not prevent a fault message being issued <strong>and</strong>the frequency inverter being switched off due to a suddenovercurrent, for example caused by a short circuit.IfI 1A004Figure 143: Current limitI M : Motor currentI 1 : Current limitPNU b023tCaution!Note that the current limit cannot prevent a fault message<strong>and</strong> shutdown due to a sudden overcurrent (e.g. causedby a short-circuit).PNU Name Adjustable in RUN mode Value Function WEb021b022Current limitcharacteristic 1Trippingcurrent 1NormalExtended– j 00 Motor current limit not active 0101 Motor current limit active in all operating states02 Motor current limit not active during acceleration– j 0.5 to1.5 x I eSetting range of the tripping current as a multiple of thefrequency inverter rated current, i.e. the range is given inamperes (A).b023 Time constant 1 – j 0.1 to 30 s When the set current limit is reached, the frequency isreduced in the time specified here.Caution: If possible, do not enter a value less than 0.3 here!b024b025Current limitcharacteristic 2Trippingcurrent 2– j 00 Motor current limit not active 0101 Motor current limit active in all operating states02 Motor current limit not active during acceleration– j 0.5 to1.5 x I eSetting range of the tripping current as a multiple of thefrequency inverter rated current, i.e. the range is given inamperes (A).b026 Time constant 2 – j 0.1 to 30 s When the set current limit is reached, the frequency isreduced in the time specified here.Caution: If possible, do not enter a value less than 0.3 here!1) Inverter rated current1.2 xI e1)1.01.2 xI e1)1.0138