Patent ID: 8274354

Claim:
A transformer comprising: a yoke which has a web and at least two limbs; a coil placed over each of the limbs; at least one mount, to which the web is fixed and which has plural bearing surfaces for plural transformer coils; at least two supporting blocks for each coil placed on each bearing surface, wherein the two supporting blocks are stacked one on top of the other; elastic compensation elements fitted to a coil-side mounting surface of the supporting blocks; at least one strip on longitudinal side surfaces of the supporting blocks which run at right angles to the mounting surface, to lengthen a creepage distance, wherein the at least one strip runs in the longitudinal direction and parallel to the mounting surface of the supporting blocks; and a projection on one of the two supporting blocks on a contact plane between the two supporting blocks, another of the two supporting blocks having a first depression matched to the projection, wherein the projection and first depression run in the longitudinal direction, and wherein the projection fits into the first depression such that the two supporting blocks are guided with respect to one another by the projection and the first depression.