Voltage stabilizers for xlpe cable insulation

We have synthesized voltage stabilizers with increased efficiency as measured on XLPE small scale test objects. For the best addition of 0.4 wt-% gives 50% increase in electrical tree inception field strength. Moreover, by changing the substituents we could influence the electronic properties of our molecules. Molecular modeling shows that in each series the voltage stabilization efficiency can be related to the ionization potential only. It is also clear that the aromatic core has a significant influence. Benzophenones show higher efficiency than rigid aromatics at the same ionization potential. In addition, some properties essential for cable insulation applications are discussed.