There are two types for the ceramic insulator,normal and anti-pollution type. the performance of the ceramic insulator as follows: TypeXWP1-70Unit spacing160mmNormial diameter255mmNorminal creepage distance400mmRated E&M failing load70KnRoutine tensile load35KnCoupling size16Power frequency withstand voltagewet42Kvdry80KvDry lightning impulse withstand voltage120KvRadio interferencne volltageTest ...