... caused by short circuit,overloading,block loading,current leakage etc. YD2300 Series Intelligent Motor Protector, developed by ... AC current, rating voltage 660V) caused by short circuit, overloading, block loading, phase loss/unbalance, over/under ... or zero sequence.Feature ModelStructureFunction & FeatureYD2301TIntegrated² The motor protector replaces the thermal relay protection by adopting Normal ...