This three-phase DC high-voltage power supply is suitable for the development and testing of frequency converters for railway engineering. It is situated in development laboratories, proving grounds, test institutes, schools and universities. Because of the high DC output voltage, appropriate safety measures have been taken, such as:
- Emergency-off circuit with external inputs and outputs as double-pole potential-free contacts for emergencyoff circuits and safety circuits
- Warning lights and additional connections for external warning systems.
- Discharge circuit for the intermediate-circuit capacitor
- Earth trip with compressed-air drive to short out and earth the DC output
To ensure safety, in the event of mains failure, the DC output is shorted out and earthed by the compressed-air drive.