Contact System:Material: Copper-Chromium alloy (CuCr, approx. 50:50 ratio), combining high arc resistance (withstands short-circuit current above 100kA) and low chopping current level (chopping value <0.5A when breaking small inductive currents).Design: Longitudinal Magnetic Field Contact (LMT), generating rotating magnetic field through electromagnetic coil to evenly distribute arc and enhance breaking capacity (up to 40kA).

Vacuum Sealing: Stainless steel bellows (B30P) maintain vacuum degree (<10⁻⁴ Pa), ceramic housing (Al₂O₃) or glass-ceramics provide insulation and mechanical support.Shield (copper or copper alloy) prevents metal vapor from contaminating the housing and improves electric field distribution.