Electrification of bascule bridge
Electrifying a bascule bridge, by the very nature of its operation, cannot be done with a traditional catenary usually made up of a mechanically tensed, contact wire made from hard copper
Electrifying a bascule bridge requires the installation of a sturdy catenary element and two swivelling catenaries. This equipment allows traffic (trains – cars), to go through when the bridge is in function, and clear some space to manoeuvre the bridge to let boats go through.
The rotating of the arm is obtained by the linear travel of a hydraulic jack.
Each swivelling arm has its own central hydraulic system, at the foot of the structure. The rigid pipework for the hydraulic supply, as well as cable trays, are fixed to the inside of the structure's pillars.
L'indexage est réalisé à partir d'un vérin hydraulique, le système indexeur est composé de :
- un vérin hydraulique
- un système de guidage linéaire
- un vé à l'extrémité permettant d'emprisonner un axe épaulé
The same system locks the arm into collection position, or the arm in retracted position, and the plate that includes two blocking axes
Located on the bascule bridge at 5,100 from the rail level, the rigid beam is fixed by means of five, height adjusted, fixed suspension, attached to five arms fixed onto the structure of the bridge.
In the event of a power failure, or a failure of electrical elements internal to the central hydraulic system, sensors, control cabinet, the operator may act directly on the central hydraulic system by the interlocked manual pump. To this end:
- He actuates the bypass valve by pushing it
- He actuates the locking control valve manuallyUsing the manual pump,
- He unlocks the arm
- He de-actuates the locking control valve and actuates the swivel control valve, and engages the swivelling by means of the manual pump.