Why does the Power Current Transformer burn down during use?

There are many reasons for the Power Current Transformer to burn out, the most common ones are the following. The Power Current Transformer opens circuit twice, generating high voltage, causing the Power Current Transformer to burn out; the insulation ages after being used for too long, causing local breakdown or discharge, resulting in overvoltage, causing the Power Current Transformer to heat up and burn out; the Power Current Transformer connects aluminum once The contact surface of the row is over-oxidized, the contact resistance is too large, and the Power Current Transformer is burned out due to heat; the user is overloaded for a long time, causing the Power Current Transformer to be heated and burned out, etc.