ELEKTRISCHE INSTALLATION FÜR EIN ELEKTRISCHES BEGLEITHEIZUNGSSYSTEM FÜR EIN METALLROHR ZUM TRANSPORT VON FLÜSSIGKEITEN UND ELEKTRISCHES BEGLEITHEIZUNGSVERFAHREN FÜR SOLCH EIN ROHR

摘要

An electrical installation for an electrical system for trace heating a fluid transport pipe (8) made of metal, at least one polyphase circuit having three main electric cables (6-1, 6-4, and 6-7) in a star connection, and one additional electric cable (6-2, 6-3, 6-5, 6-6, 6-8, and 6-9), the main cables and the additional cable positioned around the pipe and connected at the pipeline end to a common connection ring (10) forming a point of zero electric potential, and detector for detecting a failure, if any, of the polyphase circuit to identify a failed main cable in order to replace it with the additional cable.