Siemens IGBT VVVF | Class 717 Traction Sound | PWM Inverter - Class 717 Inductor Recording

[@Andrewjg_89]

The Class 717 Desiro City on AC 25kv OHL are lot more louder than on DC 750v 3rd Rail. Same with the Thameslink Class 700 and Southeastern Class 707 City Beam.

[@atom608]

Is there any power output difference as in HP or torque when these are on DC vs AC?

[@ItsYa165]

There should be