Battery Charger and Power Supply
The Battery Charger and Power Supply (ASC), compliant to RFI IFS330A Italian railway Specification, is a DC Uninterruptable Power Supply, which feeds, by means of a DC Voltage BUS, auxiliary systems provided within Railway Electrical Substations (SSE), ensuring continuity of operation even in case of Mains Voltage interruptions.
The ASC requires an input connection to a Three Phase 400 VAC Mains and provides an output DC voltage settable either to 110 VDC or 132 VDC.
In case of input Mains AC voltage available – normal operation – the output voltage is supplied by the power supply (GAL) subunit, while the battery charger (GCB) subunit charges the equipped battery pack.
In case of input Mains fail the switching unit (GCU) switches the battery to the output DC BUS ensuring continuity of operation.
The ASC is available as:
- Basic configuration: 1 GAL subunit and e 1 GCB subunit
- Redundant configuration: 2 GAL subunit and 2 GCB subunit.
Moreover both GAL and GCB are made in a modular design, in order to achieve a N+1 redundancy within each subunit; this allows to realize a higher reliability even without redundancy of the whole subsystem.
The ASC includes a Diagnostics & Monitoring embedded Subsystem (SDM), provided with touchscreen LCD interface and LAN communication interface for local and remote command/control.
Due to the introduction of the modular approach, delivered power is shared between paralleled modules, so that a single module failure doesn’t affect the power supply or battery charge operation.
It’s possible to implement N+1 redundant systems, avoiding to install twice the needed power capacity as traditional redundancy approach.
The modular design and the appropriate distribution of functions allowed to get higher performances in a reduced size compared to larger power single unit approach.