Why an eletrical motor have an higher input current?
The causes of an higher input current in an electrical motor could be: • motor with different nominal tension/frequency than the supply line; • a phase is lost (3~ motors); • winding interrupted; • winding to ground; • wrong electrical connections on the terminal box (or inside stator); • there was not exchange between Star/Delta connection; • tension outside of the tolerance limits (under or over voltage); • wrong size of motor in relation to the applied load; • pump is moving a fluid with specific weight or density > than water; • hydraulic or mechanical parts blocked; • wrong rotor.
