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Can we use LADN* auxiliary contacts to be installed to the front of LC1D*K** capacitor contactors?

There is no possibility to install the front auxiliary contacts type LADN*** on the LC1D*K*** contactor.
This is due to the main auxiliaries for capacitor contactor are specific additive block for bank capacitor
where there is a system to derivate current in resistive wires few milliseconds
before contactor closing to reduce peak of current and this function is absolutely not embedded in LADNxx.
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