1 This standard describes the procedure for determining the dielectric strength of plastic materials at industrial frequency (50 ±1 Hz). 2 The process is applicable to both thermoplastic and thermosetting products; it can be used both on test tubes prepared specifically and directly from the materials, and on test tubes obtained from semi-finished and finished products).
UNI 4291-1972 history
1972UNI 4291-1972 Plastic material testing. Hot hard materials. Industrial frequency medium strength measurement