Patent ID: 7344202
Filing Date: 2008-03-18
Classification: B60L

Abstract:
1. A method for detecting and performing diagnostics in connection with an incipient ground fault that may occur in an electrical propulsion system of a traction vehicle, said method comprising: providing a first ground connection for said electrical propulsion system, said first ground connection forming a grounding path generally used by said electrical propulsion system during normal operation; providing a second ground connection for said electrical propulsion system, said second ground connection forming a grounding path selectively usable in lieu of said first ground connection; defining a control strategy for switching between the first ground connection and the second ground connection; monitoring a respective leakage current associated with at least one of said first and second ground connections; and controlling switching between said first and second ground connections based on the monitored leakage current associated with at least one of said first and second ground connections, wherein said switching disconnects a ground connection associated with the leakage current.