Channel Tunnel Health Monitoring - Hot axle box detector: False alarm investigation (RR-PRD-001)

The Hot axle Box Detector (HBD) systems, that form part of the Channel Tunnel Health Monitoring (CTHM) site at Sevington, have experienced a number of false alarms that are related to the 'drawing of an arc' (sometimes referred to as 'flash over'). These result in unnecessary and operationally disruptive procedures...