Testing an insulation of a conductor segment for an electrical machine, providing conductor segments with a test, and test device for performing the test

A device for testing an insulation of a conductor segment for an electrical machine for defects, the device comprising:

• a test connection for electrical connection to a conductor segment connection of the conductor segment;
• a test contact for scanning a to-be-tested area of the insulation;
• a relative movement device for moving the conductor segment connected to the test connection and the test contact relative to one another in order to scan the to-be-tested area of the insulation with the test contact;
• a checking device configured to check whether an electrical connection exists between the test connection and the test contact during a scanning of the insulation by the test contact in order to determine when there is a defect in the insulation;
• and,
• a charging device for capacitively charging the conductor segment before or during the scanning by the test contact.