Research on Influence of Charge Quantity of Particles on Contamination Accumulation Characteristics

As the charged particles are subjected to electric force, the electric field has a significant influence on the contamination characteristics of insulator. The electric field force is related to the electric field intensity and the charge quantity of particles. In order to study the influence of charge quantity of particles on contamination accumulation characteristics, the artificial contamination accumulation test on glass specimen under uniform electric field was designed and carried out. The grounded metal nets with different hole apertures were used to filter the particles that were blown to the chamber, so as to get the particles with different charge quantity approximately. Test results are shown as follows: Under AC electric field, the amount of contamination accumulated on the surface of specimen is decreased with the increase of the charge quantity of particles. Under DC electric field, the amount of contamination accumulated on the surface of specimen is increased with the increase of the charge quantity of particles, and was increased first and then decreased with the increase of electric field intensity. The critical electric intensity is 1. SkV/cm under both positive and negative electric field.