Experience with uprating 35 KV overhead line to 110 KV voltage level using post line insulation

Paper describes the first experiences gained during design and the implementation of the first compacted high voltage power line with post line insulators in Slovenia. The project goal was to take the advantage of using the route of way of the existing obsolete 35 kV transmission line in the way to restore it and upgrade to 110 kV voltage level in the future.