Overview of Insulation Coordination
Overview of Insulation Coordination
What is Insulation Coordination?
Insulation Coordination is the process of determining the proper insulation levels of various components in a power system as well as their arrangements. It is the selection of an insulation structure that will withstand voltage stresses to which the system, or equipment will be subjected to, together with the proper surge arrester. The process is determined from the known characteristics of voltage surges and the characteristics of surge arresters.
Some common terms that must be known when performing an Insulation Coordination Study.
1. Basic Impulse Insulation Level (BIL)
This is the reference insulation level expressed as an impulse crest (or peak) voltage with a standard wave not longer than a 1.2 x 50 microsecond wave.
A 1.2 x 50 microsecond wave means that the impulse takes 1.2 microseconds to reach the peak and then decays to 50% of the peak in 50 microseconds. (Below for a figure of the BIL waveform)
See detail : Overview of Insulation Coordination
