Welding system and method utilizing a ground integrity monitor
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United States of America Patent
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Jul 5, 2005
Grant Date -
Jul 15, 2004
app pub date -
May 22, 2003
filing date -
Jan 15, 2003
priority date (Note) -
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Abstract
A welding system having a welding gun, comprising a casing that is grounded through a ground conductor, and a monitoring device, which detects the resistance of the ground conductor. A blanking device deactivates the monitoring device during the welding operation to reduce the danger of shut-downs through the ground integrity monitor. It is proposed to either deactivate the measuring circuit of the ground integrity monitor or to switch off the welding power interruption associated therewith as long as a welding current may flow or is flowing through the ground conductor. The monitoring device is deactivated or blanked out only for an essentially negligible fraction of the entire time, and there is no danger of any impairment of safety due to this short-term deactivation.
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