What means hypo test for ht motors?

A hypo test, or hipot test, for HT (high tension) motors is a high-voltage electrical test performed to assess the insulation integrity of the motor windings. During this test, a high voltage is applied between the windings and the motor frame to identify potential insulation breakdown or weaknesses. It is crucial for ensuring the motor's reliability and safety in operation, helping prevent electrical failures and hazards. Hypo testing is typically conducted during manufacturing and maintenance checks.