transmission line nears railway 1

[Jorge3pe]

We are designing an electric transmission line in a route parallel to a railway, the question is:
1. Is there any norm or standard that regulates said construction?
2. What railway regulations restrict this?

 

[cranky108]

Just for reference, would there be any difference if you were building said transmission line next to a pipeline?

 

[stevenal]

For the USA: NESC (IEEE C2) 231C, 232, Table 232-1, 234I.

 

[waross]

I at one time my drive to work took me past about 10 miles of a 60kV transmission line adjacent to a natural gas distribution line.
I played bridge with a gas service man.
He told me that along that section, all residential meters were connected with insulating nipples and they had specific procedures to avoid a spark from the induced potential on the pipeline.
A call to the railway may be in order.
If they are using the track as a ground return for signal systems an induced voltage may cause issues.

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

 

[DBL-E]

If you are just referring to clearance requirements, that is NESC (and there are states that have specific requirements like California). You can probably ask for support from PLS-CADD if you are using their program to design the t-line.

As Waross mentioned, there is an 'AC Interference' study that is related to the EMF effects on the rails operation. I don't believe there is a specific standard that mandates this, but there are several issues that can happen in these shared corridors and multiple guides exist. Below are the ones I would reference:
EPRI Power System and Railroad Compatibility Guide
IEEE 2746 Guide for Evaluating linear facilities near transmission lines

The EPRI guide provides a great description of railroad operation, the possible concerns, and has a section dedicated to possible mitigation approaches. The IEEE gives more of an overview of possible issues and couple examples in the appendix.

The type of rail and its signaling can make a big difference, and the main issues to look into are personnel safety and equipment operation. Easypower has an AC Interference webinar that discusses the main issues for pipelines and railroads.