Spine Fit

Natural esters such as caster oil has been used as a capacitor impregnate for many years. But currently two types of synthetic esters are being used that are organic esters and phosphate esters. Organic esters have high boiling points in relation to their viscosity and therefore have high firing points. They have a good viscosity temperature relationship and are used extensively in capacitors. The phosphate esters also have high boiling point and low flammability and therefore are used in transformers.