Project Summary
Repaired and tested 60+ Class 390 SUH Boxes – helping Alstom replenish float stock and reduce fleet downtime.
Identified and resolved key failure causes – including water ingress and ageing network resistors affecting unit reliability.
Reduced repair lead times and improved fleet availability – through a comprehensive repair and functional testing programme.
Client challenges
Alstom approached TP Matrix Ltd in January 2024 to explore support for their Class 390 SUH Box repairs. These units are critical to the fleet as the tilting system of the Class 390 vehicles is managed via sensors (gyros, accelerometers) on bogies, and a train-level “tilt processor” (TTP) that communicates with vehicle tilting processors (VTPs). Alstom faced prolonged lead times on repairs for the units. Failures were impacting fleet availability, with units often sidelined for extended periods.
Client feedback
“We recently engaged TP Matrix to overhaul electronic boxes that connect with the bogie sensors across the entire Class 390 Pendolino fleet and the results have been outstanding. From the outset, their team demonstrated a high level of technical expertise and professionalism, ensuring the refurbishment process was smooth, efficient and aligned with our operational requirements.
The quality of the work delivered was excellent, with noticeable improvements in reliability and performance post-overhaul. TP Matrix were responsive throughout, providing clear communication and timely updates, which made collaboration easy and effective. Their attention to detail and commitment to delivering a robust solution have made a significant impact, and we wouldn’t hesitate to work with them again on future projects.”