Electronic interlocking and Automatic Block for the single track section Arenys Mar-Maçanet

The project consisted in providing the new latest generation electronic interlocking S3e, approved by RENFE and developed according to the most demanding safety requirements set out in the regulations of the European Committee for Electrotechnical Standardization (CENELEC) to stations in the route Arenys-Massanet, in the stations Canet, San Pol, Calella, Pineda, Malgrat y Blanes.

The following actions were undertaken:

• Electronic block with axle counters, integrating the axles evaluation logic.
• Control by videographic system in each one of the stations, and adaptation of existing local control interlock Arenys de Mar to Maçanet, to establish the blockade ratio through axles evaluator with Canet and Blanes respectively.
• Integration into the CTC system located in Barcelona, of the remote control of the installations of route Arenys de Mar - Maçanet.
• Field elements such as signals with ASFA equipment, electric point machine, telephony of signals, ...
• Adaptation of current communications to the requirements of the route exploitation through CTC.
• Adaptation of the equipment of existing line of 2,200 V to the new installations needs  and the facilities of an uninterruptible power supply (UPS).
• Installation of a cable network for the facilities of signaling and communications.
• Construction and adaptation of a chanelling and trenches network in the route of the project.
• Building, in the stations of  Canet, Calella, Pineda and Blanes, of a room for the location of the electronic interlocking equipment and conditioning of the existing one in Sant Pol and Malgrat.

This interlocking was designed by Enyse to facilitate its deployment in a wide range of railway installations and to adapt it with flexibility to different signalling operative criteria with a modular configuration that allows to adapt devices  to the  specific size of each station.

The system is configured in a "2 out of 3" architecture, using three computers working under a redundancy, Safety-based principle, and it requires the agreement of at least two computers to issue orders to the field elements. This redundancy principle also applies to the control logic of the Input and Output modules.