Evaluation of a New Development in HV Insulation for Large Machines

A new high-voltage (HV) continuous-tape insulation impregnated with a synthetic resin has been developed for use in stator windings of large machines. The development work behind the construction and processing of the new insulation is described. The product is compared with well-known insulations with respect to electrical, mechanical, and thermal properties. Results are presented from special investigations of the discharge endurance of the insulation, its heat-transfer properties, and its ability to withstand the mechanical stresses occurring in service.