Who do other countries do Neutral Sections for OLE

[jharris@furrer]

Hello everyone.

I'm looking in to a new design of Neutral Section for future UK Overhead Line Equipment (OLE). I'm looking for inspiration from abroad, countries with AC OLE like the Netherlands, France, Germany, Italy, Russia, China, Japan.

In the UK we have two types:

• The short Neutral Section (Arthur Flury) which is the most common in the UK and is about 8m long.
• The Carrier Wire Neutral Section (CWNS) which is a lot longer about 200m and made up of several overlaps. Found on Great Western predominently but might be being installed on MML and Transpennine electrification projects. I've included a drawing of this.

Is anyone aware of any different ways of doing neutral sections? I think on French LGV routes they have a full length wire run about 1km long that is a floating buffer section between two separate phases of electricity supply. That's about all I've got at the moment. Any help would be appreciated.

Cheers

 

[nlogax]

Neutral sections in India too, unsurprisingly considering the history of Indian railways.

https://circuitgyan.com/2023/02/12/neutral-section-in-overhead-traction-system/

This situation is avoided by interposing a small length of OHE, called the neutral section.

It is insulated from both sides and is not connected to any source of power supply. Its main function is to allow physically smooth and electrically sparkles passage of pantograph from one section to the other.

As per Indian Railway practice, neutral section is located in the middle of two feeding posts and in front of sectioning and paralleling post.

 

[td97]

Static frequency converters can remove the need for neutral sections, and are more common in mainland Europe.

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