Boltar wrote:
Boltar wrote:
Why do the trains on the NLL switch over to 25Kv AC at Hackney Wick
and then switch back to DC at Dalston when the 3rd rail is continuous
along that section anyway? Why not just stay on DC and save the wear
and tear on the pantograph?

B2003

Why do the trains on the NLL switch over to 25Kv AC at Hackney Wick
and then switch back to DC at Dalston when the 3rd rail is continuous
along that section anyway? Why not just stay on DC and save the wear
and tear on the pantograph?

B2003

IIRC the 313s are governed to 30mph in DC Mode for Moorgate reasons. I
don't know linespeeds on that section but it may make a difference

"Mark B" wrote

IIRC the 313s are governed to 30mph in DC Mode for Moorgate reasons. I
don't know linespeeds on that section but it may make a difference

The FCC units are governed to 30 mph on DC, but the units that were
transferred for the Euston - Watford DC and NLL are not governed in this
way. But it has long been accepted that 313s do work better on AC - it's
just that no-one seems to have published a convincing explanation of why.

Peter

Are the old LNWR sub-stations still used on the DC and NLL Lines?
There is a very typical-looking large brick building between Kenton
and South Kenton, another at Willesden Junction, but a similar
structure on the NLL near Brondesbury (once visible from the LUL
lines) has now gone.