Feed-through terminals with ceramic insulator as standardized up until now in DIN 46265 part 1 and, in particular, those used for electrical machines are no longer sufficient for high system short-circuit powers. Therefore feed-through terminals with cast resin insulators and four flange mounting holes has been standardized.
DIN 46264:1988 history
1988DIN 46264:1988-06 High-voltage feed-through terminals with cast resin insulator
1988DIN 46264:1988 High-voltage feed-through terminals with cast resin insulator