What causes the current transformer to burn out
Jul 07, 2023| The first reason is that the secondary side of the current transformer is caused by an open circuit due to weak wiring.
In the process of using the current transformer, if the secondary side is open due to the disconnection of the wiring, then the current will be equal to zero, and the impedance will appear infinite. We know that the current transformer is actually a step-up transformer, so it will be in A very high electromotive force is generated on the secondary coil, sometimes reaching a voltage of several thousand volts, which will increase the magnetic flux density of the current transformer and cause serious saturation of the iron core. The iron core overheats and burns out the current transformer, which is one of the common causes of current transformer burnout.
The second reason is because the overload running time is too long
If the current transformer is overloaded for a long time, the coil will heat up. If the time is long, the current transformer will be burned due to the overheating of the coil.
The third reason is - the burnout caused by the increase of the contact resistance on the secondary side
If the conductive material connected to the current transformer does not meet the requirements during use, this will cause the contact resistance of the wiring to be too large and generate heat. When the heat reaches a certain temperature, the current transformer will also burn out.