Dielectric testing of polysil for inexpensive underground distribution and transmission

The monomer and aggregate content of POLYSIL was optimized, as well as processing techniques, to optimize the physical and electrical properties for use in underground applications. POLYSIL castings with embedded electrodes, ranging in size from 8 pounds to 13,000 pounds, have been produced. The largest polyester/styrene based POLYSIL casting weighed 13,000 pounds and the largest methyl methacrylate casting weighed 8 pounds. Statistical analysis has been performed on over 200 test specimens. Design curves for POLYSIL, as an underground insulating material, are presented.