I read in a magazine that Overground trains on the Euston-Watford service
won't be able to be extended to 5 cars until power supply upgrades have
taken place. I don't understand why power supply upgrades are is needed.
This route used to be served by 7 car Bakerloo Line trains.

--
Colin Rosenstiel

On 21/12/2014 21:49, wrote:
I read in a magazine that Overground trains on the Euston-Watford service
won't be able to be extended to 5 cars until power supply upgrades have
taken place. I don't understand why power supply upgrades are is needed.
This route used to be served by 7 car Bakerloo Line trains.


Guessing but perhaps "used to" are the operative words in that sentence,
i.e. the power supply kit / arrangements on the line have changed since
1982.

Mizter T wrote:
On 21/12/2014 21:49, wrote:
I read in a magazine that Overground trains on the Euston-Watford service
won't be able to be extended to 5 cars until power supply upgrades have
taken place. I don't understand why power supply upgrades are is needed.
This route used to be served by 7 car Bakerloo Line trains.


Guessing but perhaps "used to" are the operative words in that sentence,
i.e. the power supply kit / arrangements on the line have changed since 1982.

And maybe 5-car 378s, with modern traction equipment, need more power than
old tube trains (1972 stock, presumably)?

In article

rg, (Recliner) wrote:

Mizter T wrote:
On 21/12/2014 21:49, wrote:
I read in a magazine that Overground trains on the Euston-Watford
service won't be able to be extended to 5 cars until power supply
upgrades have taken place. I don't understand why power supply upgrades
are is needed. This route used to be served by 7 car Bakerloo Line
trains.

Guessing but perhaps "used to" are the operative words in that sentence,
i.e. the power supply kit / arrangements on the line have changed
since 1982.

And maybe 5-car 378s, with modern traction equipment, need more power than
old tube trains (1972 stock, presumably)?

1938 stock actually. I guessed it's the same as the Southern. Massive power
supply upgrades were needed for the switch from camshaft-controlled stock to
power electronics.

--
Colin Rosenstiel

On Mon, 22 Dec 2014 06:14:01 -0600
wrote:
In article

rg, (Recliner) wrote:

Mizter T wrote:
On 21/12/2014 21:49, wrote:
I read in a magazine that Overground trains on the Euston-Watford
service won't be able to be extended to 5 cars until power supply
upgrades have taken place. I don't understand why power supply upgrades
are is needed. This route used to be served by 7 car Bakerloo Line
trains.

Guessing but perhaps "used to" are the operative words in that sentence,
i.e. the power supply kit / arrangements on the line have changed
since 1982.

And maybe 5-car 378s, with modern traction equipment, need more power than
old tube trains (1972 stock, presumably)?

1938 stock actually. I guessed it's the same as the Southern. Massive power
supply upgrades were needed for the switch from camshaft-controlled stock to
power electronics.

You have to wonder why it was necessary if the claims about electronic control
being more efficient are true. Surely that couldn't have been marketing fluff
could it?

--
Spud

In article , d
() wrote:

On Mon, 22 Dec 2014 06:14:01 -0600
wrote:
In article

-september.
org, (Recliner) wrote:

Mizter T wrote:
On 21/12/2014 21:49, wrote:
I read in a magazine that Overground trains on the Euston-Watford
service won't be able to be extended to 5 cars until power supply
upgrades have taken place. I don't understand why power supply
upgrades are is needed. This route used to be served by 7 car
Bakerloo Line trains.

Guessing but perhaps "used to" are the operative words in that
sentence, i.e. the power supply kit / arrangements on the line have
changed since 1982.

And maybe 5-car 378s, with modern traction equipment, need more power
than old tube trains (1972 stock, presumably)?

1938 stock actually. I guessed it's the same as the Southern. Massive
power supply upgrades were needed for the switch from camshaft-controlled
stock to power electronics.

You have to wonder why it was necessary if the claims about
electronic control being more efficient are true. Surely that
couldn't have been marketing fluff
could it?

I now recall reading about it at the time. The characteristics are different
and break old supplies. The efficiency mainly comes from regeneration of
course.

I think my question was really because I didn't realise the new 5th cars
were powered.

--
Colin Rosenstiel

In article ,
(Paul Corfield) wrote:

On Sun, 21 Dec 2014 15:49:04 -0600,
wrote:

I read in a magazine that Overground trains on the Euston-Watford service
won't be able to be extended to 5 cars until power supply upgrades have
taken place. I don't understand why power supply upgrades are is needed.
This route used to be served by 7 car Bakerloo Line trains.

The line is basically full of old restrictive "make do and mend"
signalling and traction current. It's no shock that putting bigger
trains on to the route might be enough to tip things over. The
traction supply has been strengthened or replaced on all the LU routes
that are getting major upgrades and new rolling stock.

I think the TfL game plan is simply to put new 4 car trains on the
route. These have been added to the GOBLIN / West Anglia order. The 5
car trains displaced will be diverted to strengthen other Overground
routes. Clearly those trains won't turn up until 2017.

As reported elsewhere there are also issues with the traction current
supply nearer to Watford where the Met extension would run over NR
tracks. Costs have gone up because of the need to do something to the
traction current supply. There is little detail in public at the
moment but I'd guess the parsimony and cut backs of the 80s are now
having an impact at far, far greater cost.

So true! I've been watching the Borders Railway videos and can't stop
thinking how much they would have saved by not closing the line in the first
place.

--
Colin Rosenstiel