A device to measure that the puncture current of insulation that cable exposed to high voltage and high frequency

One of the most important issues in high voltage conductors is the puncture voltage point of the insulation used in the conductor. In the design of a system with high voltage, the puncture voltage of this insulation is of great importance. In this thesis, the design and application of a system that determines the puncture voltage-frequency point of enamel coated coil wires is explained. The system determines the puncture stress point of the plating by applying an AC square signal of 1 - 5000 V / 1 - 5000 Hz to a twisted and open-clad enameled conductor until puncture occurs within the desired range. The mains voltage is adjusted via a Variac so that the applied electrical signal reaches the desired peak voltage. Then, the signal received from the output of variac is passed through a rectifier circuit and connected to the DC bus voltage of the H-Bridge circuit. The AC square signal obtained from the H-Bridge circuit is folded in a high frequency transformer so that the desired signal is obtained in the secondary winding of the transformer. The high voltage signal applied to the conductor increases the current passing through the primer of the transformer when the insulation is short circuit. The signal in the transformer can be controlled with the help of a processor, as it is understood that the puncture occurs with the current value read from the primary. Finally, the system design was simulated in the PSIM program and compared with the experimental results. The experiment results and simulation results are in harmony.