Patent ID: 9723963
Date: 2017-08-08
CPC Classifications: A47L,H02J,H02M

Claim:
1. A power supply arrangement for a suction device which is selectively operable using direct current or alternating current, in particular mains current, including: a first connection to which a direct current source is connectible or connected; a second connection to which an alternating current source is connectible or connected; at least one third connection to which one or more consuming units of the suction device are connectible or connected; an electrically isolated converter which is connected on the input side in electrically active manner to the first connection; and a switchover device which is connected in electrically active manner to an output of the converter, is connected to the second connection and is connected to the at least one consuming unit; wherein by means of the switchover device it is selectable whether the at least one consuming unit is actively connected to the converter or the second connection for power supply; and wherein the switchover device has one or more components each with an electrical safety clearance, and the safety clearance of such a component is at least 4 mm in respect of the creepage distance and the total of the creepage distances of the components is at least 8 mm.