PR S 400027

Question 1

what type of works can impact traction return

Answer 1

re railing
disconnection of impedance bonds
disconnection of negative return cables

Question 2

what must be ensured when breaking traction return

Answer 2

adequate alternative traction return paths are available.

Question 3

what are the three methods for ensuring traction return is continuous

Answer 3

temporary bonding to provide an alternative traction path,
bonding to a piece of rail adjacent to the worksite and bonding that to rails either side of the cut.
connection to the overheads. requires signing onto electrical permit, OHW to remain continuous, traction rails are bonded at the break, no breaks allowed up OHW connection is in place.

Question 4

what permit is required for disconnection of all substation or section hunt connections

Answer 4

a substation access permit

Question 5

how do you protect track circuits from stray traction currents

Answer 5

disconnection of incoming or outgoing track leads

Question 6

Minimum traction rail exemptions

Answer 6

1 in 3 rails can be cut, 2 in 6 rails can be cut without providing alternative traction return.