Abstract
The newly proposed /EC dielectric test code for power transformers (Pub/. 76/3) intends to more closely
relate test procedures and test levels to system service conditions.
Based on a presentation of service conditions and methods of insulation coordinaLion with respect to
transient and operating stresses (switching, lightning impulse and power-frequency overvoltages) the newly proposed
methods are compared with existing procedures for system voltages Um> 300 kV. A critical review of the
difficulties in adapting the new test procedure to different system conditions and the consequences for manufacturers
and users is given.
Users
Please
log in to take part in the discussion (add own reviews or comments).