Dual Traction Current Supply
Farringdon station is notable because First Capital Connect trains switch between the 25 kV AC overhead supply used to the north of London and the 750 V DC third rail supply used to the south while standing at the platform. The trains that formerly ran to Moorgate used 25 kV AC throughout their journeys.
Until the start of the Thameslink Programme southbound trains that were unable to switch to DC were taken out of service at Farringdon and stabled at Moorgate to prevent them from blocking the core section of the Thameslink route. As this option is no longer possible the catenary has been extended to City Thameslink to enable these trains to continue to the southbound platform at City Thameslink using AC and then return northwards using the new crossover in Snow Hill Tunnel. The pantograph on southbound trains is normally lowered at Farringdon.
Underground trains serving Farringdon use the four-rail 630 V DC system.
Read more about this topic: Farringdon Station
Famous quotes containing the words dual, current and/or supply:
“Thee for my recitative,
Thee in the driving storm even as now, the snow, the winter-day
declining,
Thee in thy panoply, thy measur’d dual throbbing and thy beat
convulsive,
Thy black cylindric body, golden brass and silvery steel,”
—Walt Whitman (1819–1892)
“But there, where I have garnered up my heart,
Where either I must live or bear no life;
The fountain from the which my current runs
Or else dries up: to be discarded thence,
Or keep it as a cistern for foul toads
To knot and gender in!”
—William Shakespeare (1564–1616)
“Odors from decaying food wafting through the air when the door is opened, colorful mold growing between a wet gym uniform and the damp carpet underneath, and the complete supply of bath towels scattered throughout the bedroom can become wonderful opportunities to help your teenager learn once again that the art of living in a community requires compromise, negotiation, and consensus.”
—Barbara Coloroso (20th century)