While doing design for DLM schematics for electrified area, the standards says, every 2 KM DLITs should be applied.
Now, if the distance from FTN location to next DLM location is going more than 3KMs then what should be the design amendments?
Is it can be ignored or could be overcome by providing only DLITs in some in-between location?
If you are referring to UK mainline standards, I think there are some errors.
1) electrified is 1.5km, non-electrified is 2km.
2) 1.5/2km refer to maximum distances including winding lengths, not just physical separation - however, I believe it is possible to apply for a dispensation.
3) there is no mention of overall length and other DL requirements.
To answer the 3km question, provide DLITs in between. However, there is also a limitation for maximum length with a maximum number of DLITs. This is 10km from memory and includes all winding lengths. DLs are not simple science but there is probably someone who is more familiar with them than I who can provide better more practical answers.
Many Thanks Jerry,
I am working on Mainline and yes you are true I heard 1.5 Km rule for electrification and searching some standards on it.I went through SSI8503(Application Manual on earthing and bonding Appendix H, it still says 2Km.Well i will crack on this with NR.
Yes, I started putting DLITs now and also taking care of 8Km/10Km rule with taking care of windings too, DLITs(600 meters) and ISPU(400 meters)