AC CONTACT SYSTEM Russian patent published in 1997 - IPC

FIELD: electrical instrumentation engineering; ac disconnecting and shorting switches, primarily heavy-current ones. SUBSTANCE: ac contact system has main rectangular-section bus of thickness T and two groups each of K > 1 similar conducting bodies which come in contact with bus, such as laminations or levers; K bodies of first group contact bus on one side surface and K bodies of second group, on its other side surface within its height B and T; main bus is built up in thickness T of two electrically isolated partial buses of thicknesses T₁ and T₂; each of partial buses is separated through height B by K-1 longitudinal slits of length D ≥ B/2 into K elementary buses of heights B₁₁, B₁₂,...B_1K and B₂₁, B₂₂,...,B_2K, respectively so that any adjacent bodies in each mentioned group are separated by one slit; thicknesses T₁ and T₂ are chosen so as to ensure equal RMS values of currents through partial buses and their heights B₁₁, B₁₂;...,B_1K and B₂₁, B₂₂,...,B_2K are selected so as to provide for equal RMS values of currents through all elementary buses. EFFECT: improved design. 4 dwg