Dielectric Discharge

This measurement method is usually used to diagnosis multi-layer insulations, which requires the instrument to measure the discharge current and capacitance of the measured object 1 min after the removal of the test voltage. This is a very good insulation diagnosis test to detect deteriorations and other problems in the multiple insulation to be assessed.

DD 2.0 or less 2.0 - 4.0 4.0 - 7.0 7.0 or more
Criteria Good Warning Poor Very Poor