I would love to see a video explaining ways to reduce stray traction currents in your LV PE conductors when traction bonding of LV system is in place. Aim being to reduce the exposure of voltages on the PE conductors when maintenance technicians are working on the LV system. Thanks and great videos.
Sure will try to make a video on this topic. To avoid any effect of traction currents on LV system due to same earth in AC traction, we tend to provide 4P for 3 phase or 2P for single phase supply. This is done to avoid voltage on neutral reaching more than safety voltage of 50V due to higher rail potential while person is doing maintenance.
Dear Mr. Sahil - Your explanations are very good. Just a comment - In this video You have mentioned IEC60364-4-41 clause 415.2.2. Please have a look on this clause. 415.2 explains Additional protection: supplementary protective equipotential bonding and 415.2.2 explains the calculations of resistance R between simultaneously accessible exposed-conductive-parts and extraneous-conductive-parts. please check
Many thanks. I really appreciate your blogs on earthing and stand you took against mal practices in metro system. In this video I have calculated the maximum fault loop impedance provided by BS 7671 table 41.5 (or section 411.5.3 of iec 60364-4-41 or 7.4.2 of en 50122-1). The clause which you have referred is for additional protection 415.2 of iec 60364-4-41, however, for TT system RCD is mandatory.
Hello Sir, Really liked all videos you uploaded till now to improve my technical skills in traction system's, Could you please share En standards you are referring while explanations..that would help users a lot .
Many thanks. The standards which I use are from my companies portal so cannot be shared. In case if I use any IEEE papers surely I will pin then in comments.
For TNS& TNCS we need 4C power cable + separate ground cable for MDB panel incomer & for TNC do we need only 4C power cable for incomer ?? Please reply
Based on fault current as it has dedicated earth conductor to carry fault current. The earth conductor and phase conductor impedance to be taken into account while performing calculations. Refer to my lecture 3, 4, & 5 of fault current analysis series.
You made this easy to understand...
many thanks
Great explaination!!
It would be great if you can make a similar video for IT earthing system..
I would love to see a video explaining ways to reduce stray traction currents in your LV PE conductors when traction bonding of LV system is in place. Aim being to reduce the exposure of voltages on the PE conductors when maintenance technicians are working on the LV system. Thanks and great videos.
Sure will try to make a video on this topic. To avoid any effect of traction currents on LV system due to same earth in AC traction, we tend to provide 4P for 3 phase or 2P for single phase supply. This is done to avoid voltage on neutral reaching more than safety voltage of 50V due to higher rail potential while person is doing maintenance.
Superrr sir :)
Thanks
please continute this session further
Sure I will prepare more lecture related to this.
Dear Mr. Sahil - Your explanations are very good. Just a comment - In this video You have mentioned IEC60364-4-41 clause 415.2.2. Please have a look on this clause. 415.2 explains Additional protection: supplementary protective equipotential bonding and 415.2.2 explains the calculations of resistance R between simultaneously accessible exposed-conductive-parts and extraneous-conductive-parts. please check
Many thanks. I really appreciate your blogs on earthing and stand you took against mal practices in metro system.
In this video I have calculated the maximum fault loop impedance provided by BS 7671 table 41.5 (or section 411.5.3 of iec 60364-4-41 or 7.4.2 of en 50122-1). The clause which you have referred is for additional protection 415.2 of iec 60364-4-41, however, for TT system RCD is mandatory.
Very well explained...
Thank you 🙂
Vy good...
many thanks.
Are you done with the grounding topic? It has been a few months since your last post.
No still my videos left. But i did not get enough time to prepare. Will be uploading soon on LPS either this weekend or the next.
Hello Sir, Really liked all videos you uploaded till now to improve my technical skills in traction system's, Could you please share En standards you are referring while explanations..that would help users a lot .
Many thanks. The standards which I use are from my companies portal so cannot be shared. In case if I use any IEEE papers surely I will pin then in comments.
Thank you sr
For TNS& TNCS we need 4C power cable + separate ground cable for MDB panel incomer & for TNC do we need only 4C power cable for incomer ?? Please reply
Yes it is correct
In TNS how Mcb trips. Need some calculation
Based on fault current as it has dedicated earth conductor to carry fault current. The earth conductor and phase conductor impedance to be taken into account while performing calculations. Refer to my lecture 3, 4, & 5 of fault current analysis series.
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i request not to show switch connection in neutral of TNC