Sliecting thermosetting plastic,safety factor of big current is more reliable.Board type screw crinm connecting technology as structure parts.rated AC voltage 600v.rated current of connecting conduct piece with seven specification of 60,100,150,200,300,400,600A.the cross-section 10~300mm2,which is the biggest closure flow teminal .It can be divided into 3P,4P flat blot installation according to arrangement,it will be more reliable with OT,UTtemination point for connecting big current in different kind electric device.