Epoxy rods by category can be divided into two: one epoxy fiberglass rod, which is commonly known as the lead people pull rods, generally used for lightning rod insulator or dielectric constant shear strength greater than 32Mpa 3-6 referrals. dielectric loss factor (50 hertz) greater than or equal 0.02. 1. normal when volume resistivity greater than or equal 1.0 * 11 th Omri 10, when flooding is greater than or equal 9 th Omi 1.0 * 10. 1. parallel layers of insulation resistance to normal greater than equal to 1.0 * 11 th Euro 10, when flooding is greater than 1.0, equals one billion Euro * 10. Surface withstand voltage (1 minute in air pressure, pitch 30mm) 14 kV. vertical layer to withstand voltage ( 90 + -2 degrees Celsius in the transformer oil pressure five minutes) 18-20 kV. parallel layer to withstand voltage (90 + -2 degrees Celsius in the transformer oil pressure five minutes, spacing 25mm) greater than 25 kV greater than 50 K V is greater than 75 kV insulation resistance greater than or equal to 4 th Omri 5 * 10 frequency withstand voltage: on-load tap changer oil compartment on the distance (in transformer oil pressure, 100mm.5 minutes) phase distance (press customer technical requirements) is greater than 85 kV