Chokes du/dt

Chokes limiting the voltage rise steepness du/dt, ed3du type.
ED3du chokes are installed at the converter’s output. They limit the voltage steepness du/dt circa 2-2,5 times up to 700V/µs and the overvoltage amplitude up to 1000 V. They protect the windings of the asyn-chronous motor stator against overvoltages and allow to lengthen the supply wire up to 100 mb.