CONVERTER WITH SWITCH MONITORING

摘要

In order to provide a converter (1) for high-voltage technology for conversion of an electric current or an electrical voltage by means of series-connected two-pole submodules (6), which each have an energy store (7) and a power semiconductor circuit with power semiconductors (T1, T2) which can be switched on and off, wherein the power semiconductor circuit is connected to the energy store (7) such that the voltage which is dropped across the energy store, or else a zero voltage, can be produced at connecting terminals (x1, x2) of each submodule (1), of a regulation unit (9) which is connected to the power semiconductors (T1, T2) for switching on and off, and mechanical switches (10), which are arranged in parallel with each submodule (6) and are designed to bridge the associated submodule (6), whose mechanical switches can be monitored for tripping at low cost, it is proposed that each mechanical switch (16) have state monitoring means for monitoring its tripping, wherein the state monitoring means are connected to the regulation unit (9) and have a signal line (11) which is passed via the mechanical switch (10) such that tripping of said mechanical switch (10) interrupts the signal line (11).