LA1-D series auxiliary contact blocks are installed at the top of CA2-D control relay or LC1-D AC contactor for expanding the couples of auxiliary contacts points.Owing to adopting the contacting functions of sliding friction,the item can be self-cleaning&ensure the electric circuit to be reliable. LA2-D time delay auxiliary contact block are conbined with LC1-D AC contactor &LA1-D auxiliary block into LC3-D star delta reduced voltage starter to start motors. Technical Specification