ZPUE S.A. - Innovative solutions for power sector

Taking into consideration the direct current power supply system used in Poland (rail-ways – 3 kV, tramways 600 V), traction substations fulfill the role of transformer-rectifier stations. They convert the three-phase alternating current at a voltage of that used in commer-cial power generation (normally 15 kV) into a direct current, which supplies power to the traction network and then to the traction vehicle.

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