Hybrid pylon

A hybrid pole is an electricity pylon carrying circuits for various types of current. Here, the parallel guidance of a three-phase line and a railway power lines or high-voltage direct current transmission line ( HVDC line ) and a three-phase line and an HVDC line and a traction power line are possible in principle. However, only the first case of practical interest, since up to now (2011) no tours of traction current lines and HVDC lines were realized and there are only two very short parallel guides of AC and DC lines, from the HVDC Volgograd -Donbass in the area the terminal on the hydroelectric power plant of HVDC Volgograd and conti- Skan shortly before the converter station Stenkullen. ( Koordinaten57.796491612.3234603 )

In general, a hybrid mast carries two circuits for traction current and two for three-phase, with the lowest Traverse for railway power circles in a plane, and the top cross members are reserved for the three-phase circuits. The arrangement of the three-phase circuits can also be done in a level arrangement or even in three-level structure ( tree mast, mast tons ). In order not to excessively increase the mast height and width of the mast, usually the arrangement of the three-phase circuits is like in a Danube mast.

In Switzerland, there are also hybrid masts with three runners, which are housed on a mast half of a three-phase system and on the other two circuits for traction current.

If the traction current line out on the same poles parallel to a three-phase line with an operating voltage of 220 kV, as a rule, the isolation of the traction current for 220 kV is to be measured, because in case of damage of the 380 kV power line surges can occur along the traction current, which can overwhelm the 110 -kV insulators conventional traction current lines.

In Germany Hybrid masts generally contain 2 names a number from the power company that owns the three-phase circuits and a number of the Deutsche Bahn.