Pre-charging switch arrangement, power supplying arrangement and method for connecting a load to a high direct-current voltage source

A power supplying arrangement, comprising:

• a direct-current circuit connecting a high direct-current voltage source to a capacitor and having a controllable first switch and controllable second switch each arranged between a pole of the high direct-current voltage source and the capacitor;
• and
• a pre-charging switch arrangement connected in parallel with the controllable second switch and having a pre-charging resistor, a pre-charging switch, and a voltage detection device connected to the pre-charging resistor detecting a voltage across the pre-charging resistor, the voltage detection device has a comparator comparing the voltage across the pre-charging resistor with a reference voltage from a direct-current voltage source, an output of the comparator is connected to an input of a transmission unit and an output of the transmission unit is galvanically separated from the input of the transmission unit.

A method for connecting a load to a high direct-current voltage source, comprising:

• detecting a voltage across a pre-charging resistor arranged between the high current-current voltage source and the load;
• and
• connecting the load to the high direct-current voltage source depending on the voltage across the pre-charging resistor, a direct-current circuit connects the high direct-current voltage source to the load and has a controllable first switch and a controllable second switch each arranged between a pole of the high direct-current voltage source and the load.