In order to effectively absorb the high order harmonic components of the two circuit of the rectifier transformer, the output circuit can be prevented from occurring, and the output end of the rectifier transformer must be provided with a damping resistor. In any case, the output of the rectifier transformer is not allowed to be directly connected to the electric field without damping resistance.

Electric precipitator rectifier transformer matching damping resistance of the parameters of the size, the current state is not a unified standard. The rated power of damping resistance must be greater than the product of the resistance and two times the rated current of the square, and should have a safety margin.