Patent ID: 8953287
Filing Date: 2015-02-10
Classification: H02H

Abstract:
1. A mobile generator for generating a direct voltage for a tool supplied with direct current, the mobile generator comprising: an alternating voltage generator; an electronic control unit; a rectifier unit having components including a direct-voltage output with live conductors for connecting the tool; a protective potential, said protective potential being one of a ground and a protective wire; a protective device between the live conductors and the protective potential, the protective device comprising an insulating spark gap for grounding the live conductors via the protective potential in response to an error having an associated defined response voltage occurring on one of the two conductors; an indicator device associated with said insulating spark gap, wherein the indicator device is adapted for recording a response of the insulating spark gap; and a switch-off device coupled with the indicator device and in case of an error switching off the generator via one of said control unit and said direct-voltage output, the switch-off device controlling a re-closing of the generator as a function of a frequency of responses and/or a response rate of the insulating spark gap.