// Rectify identified deficiencies
DEG Signal, with AGHE Ltd as a sub-contractor, working for S&T Cover Ltd has been awarded a signalling / E&P design contract to rectify identified deficiencies at 56 non-public area sites throughout the Wessex area.
The need comes about following a railway worker receiving an electric shock on a 650V signalling power supply system. The Office of Rail and Road (ORR) issued an Improvement Notice relating to 650VAC signalling power supply systems.
Subsequently, (as stated in NR/SIN/119 Issue 2) discussions with the ORR have confirmed that the maximum safe working voltage is 60VAC or 120VDC.
// Maximum safe working voltage
Consequently, there is a requirement that equipment operating above the maximum safe working voltage used for signalling power supply or signalling control circuits, be upgraded to safer power supplies.
Within the Wessex Route, a detailed asset condition survey was carried out and a condition survey was undertaken to confirm the extent of the works required at each location.
// Three specifications
An initial 12 sites have been awarded following site surveys and these are currently being designed. The installations will come in one of three specifications:
1. Class II Micro FSP: Inside existing location case.
2. Class II Annexe Type FSP: Clamps using an innovative bracket system to the existing location case.
3. Standalone Class II FSP: New apparatus case for the power supply.