The surge tester is an instrument designed for testing coil-type products such as transformers, motors, switches, generators, and inductors. It is capable of performing inter-turn short circuit detection to assess the self-insulation performance of the coil itself, identifying potential shortcomings in self-insulation caused by various factors during the manufacturing process.

The surge testerfeatures a unique ideal waveform display, enabling developers to gain a better understanding of the coil's characteristics. Moreover, it can measure inductance values during high-voltage testing, addressing the limitations of conventional inductance testers which can only operate at low voltages and require input frequencies.