This International Standard specifies a test method for the mechanical strength of cores made of magnetic oxides. This test method is suitable for most of the E-cores, ETD-cores and I-cores, but other core types such as U-cores could be tested according to a derived method agreed by the parties concerned.
DS/EN 61631:2002 history
2002DS/EN 61631:2002 Test method for the mechanical strength of cores made of magnetic oxides