Insulating columns, also known as insulators and insulating spacers, are special components that provide insulation coordination in secondary equipment. They are mainly used for the insulation between the copper bars on the cabinet and the enclosure of the cabinet and the fixed support of the copper bars, and have good insulation performance. , Compressive strength and can withstand higher mechanical tightening torque. DJY series insulation columns have passed UL certification, UL document number E349865.