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21.- Unidades de
tren y automotores eléctricos (II)
Unidades bitensión en Renfe, series 432 y 439 |
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The electrified lines
in Renfe suffered an important
dysfunction in the 50s and 60s in full development of the General
Plan of Reconstruction (PGR). Both
principal private companies, Norte and
MZA were trying to use totally
different and incompatible tensions between if. In the projects one
was not expecting to create big electrified nets,
 maximum
was considered profitable to electrify zones of influence of the
surroundings of Madrid, of Barcelona and some of the principal steps
of mountain. The principal weight of the traction would continue
being of the steam locomotive. In the half of the XXth century the
great development of the locomotive was not waiting for diesel. For
this one and other motives, Renfe's
electrifications they continued the guidelines initiated in the
years previous to the war with the exception of the electrifications
of the Castilian plateau in the lines of connection to Galicia,
Asturias and Cantabria, the surroundings of Barcelona and also in
direction Andalusia, with tension to 3.000 volts. In the first
chapter of this work already we detail this situation.
The units of Swiss origin that already we have seen in this
first part could not circulate suitably in the lines to 1.500 volts.
The recent electrification of the lines of Madrid to Avila and
Segovia, fruit of contracts and works interrupted in full Civil war
was not allowing a rapid conversion 3.000 volts. For this motive one
chose to develop and acquire suitable material to be employed at
both tensions. In the first moment it was a question of units of
train for the surroundings of Madrid and this way they were designed.
But these new trains, proceeding from a new technology applied in
Europe, offered a few presentations that were allowing them to be
employed so much at services of surroundings as in diurnal of
certain distance. These new trains registered in the series 900, are
the first protagonists of this book.
Simultaneously, in the Decennial Plan of Modernization that
was designed in the sixties, one was trying to raise the level of
rapidity and comfort of the services in diurnal in agreement to the
standards of the TAF of the fifties.
There are born like that the TER,
which simplified the exploitation of the diurnal services up to the
point that was the prototype of the new electrical diurnal trains of
long billiard cue and a half distance, initially for the services
between Madrid, Asturias, Cantabria and the Basque Country. These
new electrical units bitensión were
named Electrotrén. The units and the
series 900 were sent to destinies increasingly removed from Madrid
to realize services of regional and inter-city type up to his total
retreat in the nineties whereas the units
Electrotrén realized services of all kinds, from length
crossed even regional, activity the latter in that still they find
active, and given the recent remodelings that have received, it
seems that they will be in service some years more. |
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Characteristics |
Price: 28,25 €.
Language: Spanish
Date of publication: 2006
Nº of pages: 178
Author: Lluís Prieto i Tur.
Size: 22 X 20,5 X 1 cm.
ISBN: 84-931318-2-2 |
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