Static converters BFI 50T-TR

The device can be powered by a voltage from the 3×400 V platform network. It allows for both the operation of a 24 V buffer charger and receivers powered by 3×400 voltage installed on the carriage. The second power source
can be the 3,000 V traction network voltage. When connected to the traction network, the following circuits operate: an NPC DC/DC converter lowering the input voltage to 700 VDC, a self-start system, a contactor system allowing for the disconnection of the traction network power supply, an inverter system, and a 24 V buffer charger for charging the main batteries and powering on-board devices.

Thanks to the applied IGBT converter topology, the device features high stability of output voltages and currents, very low output current and voltage ripple, compact dimensions and weight, quiet operation, and high efficiency.

The APS-50 WN TRW MODULE includes, among others: earthing switch, main fuse as a converter protection, soft start system (resistor + contactor), main input contactor, self-start system from the network, and NPC DC/DC converter lowering the input voltage.

The APS-50 NN MODULE includes, among others:

• Inverter system (max. 75 kVA):

– 3×400 VAC – 45 kVA;
– 3×400 VAC – 8 kVA;
– 230 V/50 Hz – max. 10 kVA (option);

• 24 VDC 250 A battery charger with charging current limitation and automatic adjustment of battery charging in a temperature function;
• 24 VDC 50 A battery charger with charging current limitation and automatic adjustment of battery charging in a temperature function (option);
• two 3×400 VAC platform power supply inputs (for left-handed isle unplugged);
• event buffer, which has a parameter logger that collects information about the operating parameters of the converter, its possible damages and faults, and the parameters of the power supply network, with the possibility of reading the parameters from a socket located on the logger. The buffer is built-in in the converter. It is equipped with an output (socket) that allows to assembly inside carriages, e.g. in an electrical cabinet, with a possibility to readout contents by connecting to a computer.