ENI-ZB15/1000 Power supply unit

Zasilacz ENI-ZB15/1000
Zasilacz ENI-ZB15/1000



The ENI-ZB15/1000 power supply unit has the output voltage adjustable from 1 to 1000 V. The device is intended for testing electrical systems and equipment of rail vehicles, specifically trams.


 Rated power output  15 kW
 Supply voltage  3 x 400 V, 50 Hz
 Output voltage  Adjustable from 0 to 1000 VDC with a multiturn potentiometer
 Output current  Current limitation, adjustable from 0 to 25 A with a multiturn potentiometer
 PSU protection rating  IP21
 Duty cycle / cooling  C / AF
 Maximum ambient temperature  +35°C
 Size [W x H x L]  650 / 1090 / 655 mm
 Wheel base  500 mm
 Weight  120 kg


The power supply unit enclosure is a steel console set on 4 wheels for easy movement. The controls and the output current and voltage meters are located on the top panel of the enclosure. The back wall features an input terminal box. The supply voltage is fed with a 5-conductor cable.


The 3 x 400 VAC output voltage is first rectified and supplied to a high frequency inverter that powers a transformer. The transformer secondary winding output voltage is rectified, filtered and passed to the power supply unit output terminals. The transformer provides galvanic separation between the input line and the output terminals of the power supply unit. The output voltage is regulated by adjusting the controls of the inverter transformers. The power supply unit features a preloading circuit to enable output voltage adjustment without load.

Power kW
Input voltage
3 x 400 VAC
Output voltage
0-1000 VDC

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