Sir these lessons are so helpful and your way of teaching damn good 👍. Missing those days when we used to go for meetings and you used to explain me all this on the way. Big ups to this channel 🙏🙏
You show cross bonding by connecting all rails of two tracks. Wouldn't this interfere with signalling track circuits for detecting the presence of trains?
No it will not have that much impact as current is 50Hz. Max harmonic level are 40th harmonic... So spectral component will 2kHz freq but of very low amplitude... And nowadays in signaling we use AFTCs (9kHz to 21kHz) or CBTC system which are immune to such disturbance....
@@railwayengineeringinsights6463 thanks. It's several decades since I worked on railway signalling on non electrified routes which used DC track circuits
Yes true... In mainline they used... But nowadays they go for AFTC in case of track circuits...However in AFTCs also we cannot bond directly... We use impedance bonds...
I have no direct relationship to Electrics, Electric Traction or Railways, yet here I am, loving his lecture :-)
Many thanks.
Great Dear Sahil... Keep sharing ur expertise & knowledge.... God bless u... Thanks a lot...
Thanks sir...
I was waiting for this !
I really do miss those live classes in Agra about 25 kv AC TRACTION
Excellent explanation..you are a star
Sir these lessons are so helpful and your way of teaching damn good 👍. Missing those days when we used to go for meetings and you used to explain me all this on the way. Big ups to this channel 🙏🙏
I too miss those days brother...
Very nice lucid and easy to understand. Love it
Helpful info... Keep it up.. Awaiting more lectures.... 👍
Very Informative Video . Especially on Earthing Bonding
Thanks... It is just the start... You will learn a lot from upcoming video... Contents which are uncovered in any other videos or books...
Awesome Explanation 👍👍
Many thanks.
Very informative video sir, thank you
Many thanks..
Thank you
Earthing systems are classified as TNS, TN-C-S & TT systems. What system of earthing are we using in the traction supply system.
In railway we use TN or TT or hybrid of this as per en 50122-1. I have explained in lecture 10 of E&B series.
What is the transformer vector group for 132kV 3 phase to 27.5kV single phase?
It is not a 3 phase transformer... The voltage 132kV is line to line.... However for this type of traction trafo... It is vector group Ii..
sir, can u Please explain why 1.35 factor used for 12 pulse transformer???
Please check lecture 5 regenerative braking and average voltage for derivation of this factor
nice explained
Many thanks
Why do some countries use 16.7 Hz freq. for their 1.5KV systems?
very informative, 👍
Sir why did not using 33kv for traction
Give perfect answer
You show cross bonding by connecting all rails of two tracks. Wouldn't this interfere with signalling track circuits for detecting the presence of trains?
No it will not have that much impact as current is 50Hz. Max harmonic level are 40th harmonic... So spectral component will 2kHz freq but of very low amplitude... And nowadays in signaling we use AFTCs (9kHz to 21kHz) or CBTC system which are immune to such disturbance....
N axle counters too... Which work on freq much higher that 2 kHz... Around 40-50kHz...
@@railwayengineeringinsights6463 thanks. It's several decades since I worked on railway signalling on non electrified routes which used DC track circuits
Yes true... In mainline they used... But nowadays they go for AFTC in case of track circuits...However in AFTCs also we cannot bond directly... We use impedance bonds...
Approximately they are placed a km apart... Act as low pass filter to allow traction current to pass and block audio freq track circuit
please make vedio on co phase traction system sir and also modular multi level converter
Sure will add it in my list...
@@railwayengineeringinsights6463 tq sir
Kudos! 2×25 kV System?
Will cover in upcoming lectures...
It 3phase electric traction?
25kV single phase ac traction and dc traction