Hybrid line

Two hybrid lines near Kornwestheim, the left line carries the circuits of the Neckarwestheim – Zazenhausen traction power line

Hybrid resp. Railway current - medium voltage line at Jona SG

Hybrid masts at Leingarten

The 380 kV line Sils-Fällanden (left) results in a hybrid line in Domleschg - with a medium-voltage line from the EWZ .

In a hybrid line , different types of electricity or electricity are routed together with other media as an overhead line on a common mast linkage or in a common cable .

Overhead lines

High-voltage lines can contain several circuits for different types of current, for example three-phase current and traction current in the form of single-phase alternating current . Although the operation of these hybrid lines requires careful planning due to the unfavorable mutual influences of the various circuits, their construction in densely populated countries such as Germany cannot be avoided if three-phase current is used for electrical energy transmission.

Examples

Germany

• 380 kV line Karben - Frankfurt- West
• 220 kV line Elverlingsen - Garenfeld
• 110 kV line Offenbach - Dreieich along the A 661
• Railway power line Neckarwestheim – Zazenhausen
• Elbe crossing 2

Switzerland

• Gotthard line (section Immensee - Amsteg )
• Rupperswil-Muttenz traction power line
• 380 kV line Sils-Fällanden

Hybrid cable

Hybrid cables ( low-voltage cables up to 1 kV) are used, among other things, in many newer substations; they contain signal lines and glass fibers . In order to exclude interference from disruptive transient electrical and magnetic fields, connections are made from electrical control room controls with an optical interface to the control cabinets in the outdoor switchgear . The DC motors for operating the switches in the control cabinets require a DC voltage of usually 110 or 220 V, and at the same time logical information is transmitted as an interference-insensitive light signal in glass fibers ( optical fibers ). These and other wires for other applications are often housed in a single cable.

literature

• Installation technology on machine tools. Final seminar , Herbert Utz Verlag, Garching 1997, ISBN 3-931327-29-9 .

Web links

Commons : Hybrid lines  - collection of images, videos and audio files

• Direct current transmission via overhead lines (accessed on October 12, 2015)
• Acoustic noises from hybrid overhead lines (accessed on October 12, 2015)
• Data-energy hybrid cable for use in MRI. Patent No. DE102007021844 B4 (accessed on October 12, 2015)