phil53


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phil53 commented on S-A-04 Impedenance Bonds (Pair) by SJPModels
July 12, 2015
S-A-04 Impedenance Bonds (Pair)
phil53 Just a couple of things regarding placement of these items on a layout. Impedance bonds are NOT used where the track circuit involved has a set of points in it. Where a plain line track circuit (i.e. No pointwork) buts onto a track circuit which does pass through pointwork, you will only have a single bond on the plain line side of insulated rail joint. On the side of the track leading through the pointwork, the ‘tail’ of the bond will be connected to ONE of the rails with cables. The other use of impedance bonds is to distribute the return traction power over more than one line. In this situation you simply have a single bond placed in the middle of the EACH line concerned with the ‘tails’ connected together. Very often you will see the situation where one line has a back to back bond arrangement (where two track circuits start / finish) while the adjacent line will have a single bond for traction return purposes.
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