Surge Testing of Interlaminar Insulation of Magnetic Cores

This paper describes a simple method that has been devised for testing lamination insulation in magnetic cores. Where adequate technical and economic data are available for each specific application results are sufficiently accurate to determine whether a core is in condition suitable for rewinding, or whether it should be scrapped. The test requires only a few minutes, and the same technique and equipment are applicable to a wide variety of cores.