Tests are focussing on noise and vibration as well as the operation of heating and air-conditioning systems, braking, and dynamic performance of the 3kV dc standard EMU.

The 60m-long articulated train accommodates up to 505 passengers, including 164 seated. Each train has four wheelchair spaces and accommodates up to eight bicycles.

The Zlotys 98m ($US 25m) order, which was placed in August 2014, was financed with the aid of a Zlotys 45.5m loan from the Swiss-Polish Cooperation Programme (SPPW).

The trains are being assembled at Newag's Nowy Sacz plant and the final sets are due to be delivered to WKD in August.