Thyristor switching matrix

摘要

In a thyristor switching matrix, each horizontal line (Hl to Hm) is connected via a protective device (e.g. A1, A2) to a DC source-U. The protective device (A1, A2) normally isolates the horizontal line. When a connection point (e.g. Pll) closes a signal is applied to the protective device (A1, A2) and the horizontal line (Hl) is brought to a potential sufficient for the trigger current through any of the thyristors connected to the horizontal line (Hl) to be lower than the minimum trigger current required for firing them; thus, the connecting in parallel of several vertical lines (e.g. V1, V2) is avoided.