ENI-PT600/24/AC/CR Converter

Przetwornica ENI-PT600/24/AC/CR
rysunek techniczny przetwornicy ENI-PT600/24/AC/CR



The ENI-PT600/24/AC/CR static converter is intended as a power supply for auxiliary systems in low-floor tramway cars. The converter features an integrated emergency "drive home" converter module (24 DC / 400 DC).


 Rated input voltage  600 VDC
 Supply voltage variation  400 ÷ 900 VDC
DC output
 Rated voltage  28,6 VDC ± 0,1 V
 Maximum output current  250 A (as current source for 30 s)
 Battery recharging current limit  25 A ± 2 A
 Protection  overload
 output terminal shorting
AC voltage output
 Rated voltage  3 x 400 V +N (50 Hz)
 Rated power output  15 kW (115% overload for 10 s)
 Neutral line load capacity  2 kW
 Protection  shorting and overload
Integrated autostart systems (w/o battery voltage)
 Ambient temperature  -30°C ÷ +40°C
 Enclosure protection rating (power electronic box)  IP65
 Enclosure protection rating (vent duct)  IP21
 Weight  340 kg


The converter is installed in a sealed and robust aluminium sheet enclosure which houses all its necessary equipment. The enclosure is preserved with a powder coat finish. The converter houses the 3 x 400 VAC and 24 VDC output lines and the emergency drive home converter, which can feed the tramway inverters with the HV voltage transformed from the LV battery bank output. The converter features an autostart system, which allows turning the device on without battery power. The cover facilitates service access to the converter interior. The cover has a reflective aluminium shield which protects the converter from solar radiation heat and facilitates device cooling. The enclosure size, the installation method and the electrical connections of the converter have been designed specifically for easy mounting in a dedicated installation bay.


The ENI-PT600/24/AC/CR converter transforms the tramway contact system HV into:

  • stabilised 24 VDC output voltage for on-board auxiliary systems and battery bank charging/floating;
  • stabilised three-phase voltage output for other auxiliary systems, e.g. on-board air conditioning.

The integrated autostart system starts the converter even if the battery bank is drained. In the emergency drive home mode for driving on an insulated line of the tramway contact system, the converter converts the 24 VDC battery output into stabilised 420 VDC for the traction inverters.


schemat blokowy przetwornicy ENI-PT600/24/AC/CR

Power kW
Input voltage
600 VDC
Output voltage
24 VDC , 3 x 400 VAC

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