VARIABLE TRANSFORMER E4 2422 530 23407 Approved by SEV 1) Core Size Molded type code E4 2) Application This panel model is used for industrial and professional equipment, 3) Description The transformer is molded in reinforced polyester resin.The construction is rugged and professional. the winding is protected by moving. The moving hole pattern is simple, the support area is relatively wide and therefore the transformer can be mounted on thin chassis or panels.