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Signalling cabinet renewal on a live line

A corroded legacy enclosure replaced with a SafeBox RT double cabinet, assembled around live equipment inside a single possession.

Sector
Rail signalling
Product
SafeBox RT double
Location
Île-de-France
On site
6h 40m
Signalling rack standing exposed on its base with the old enclosure removed Before
The signalling rack with its shell gone: relays and terminations open to weather, dust and rodents.
New cabinet built around the live rack with the door open on the equipment During
Panels assembled around the live rack, with the equipment reached through a full-height door.
Completed SafeBox RT enclosure closed beside the running line After
The completed enclosure: sealed, ventilated at roof level and back in service the same shift.

The brief

The signalling point had reached the end of its enclosure life. Corrosion had opened the panel joints, moisture was reaching the rack, and the summer temperature inside was well outside what the equipment was specified for. The constraint was simple: no interruption to circulation, and no rewiring of the installation inside.

What we did

We surveyed the point, confirmed the existing slab could be reused, and prefabricated a double-width SafeBox RT to the measured footprint. On the day, the enclosure was assembled panel by panel around the live equipment.

  • Site survey and dimensional check against the existing base.
  • Marine-grade aluminium panels prefabricated to the measured footprint.
  • Assembly around live equipment, with the rack left untouched.
  • MT08045-compliant sealing at every cable entry, then handover.

The result

The point was handed back the same shift, sealed to IP65 and passively thermoregulated with no external power. The equipment inside was never disconnected and no train was delayed.

6h 40m

Total time on site

0

Minutes of disruption

IP65

Sealed enclosure

25 yr

Structural warranty

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