THEMA: Reverse Loop & Working Catenary-compartible?

Hello

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My question is:
Does Reverse Loop and Working Catenary compartible?
How make them compartible?

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Explanation:
Let us suppose, that some RailRoad has Diesel and Electric Locos and also has Reverse loop.
Diesel locos supplied from both rails.
Electric locos supplied from one rail and catenary.
(other rail uncoupled or electrically duplicate Catenary wire for dependability of current pickup)

If electric loco reverses on reverse loop, their wheels exchanged relative to rails, and there is no current pickup (in case of one rail powered) or short circuit (in case of duplicating catenary by one rail)

How to dissolve this problem of simultaneously working Reverse loop and Catenary?  

Mark:
(-on DC and on DCC - there is no matter - the problem also remains)

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Vadim