The current Network Rail UK protection systems are TPWS and AWS. The functionality of both systems is combined in a single system, generally referred to as TPWS. TPWS comprises of OSS (Overspeed Sensor System) and TSS (Train Stop System).
The Automatic Power Control system cuts the incoming power supply to a traction unit for short periods. This is required where power supplied from one part of a power distribution system in separated from another by a neutral section. Its fitment prevents damage to the power distribution system or the vehicle.
The Mors Smitt ‘Intelligent circuit protection system’ controls and monitors all AC and DC circuit breakers remotely and is capable of providing complete status of all MCB’s via display or through the Train Management System.
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