The main difference between turn to turn testing and withstand voltage testing

1、 Test purpose and object
Interturn testing: Interturn testers are mainly used to detect the connectivity between circuits or coils, and are usually applied in testing components such as power supplies, transformers, inductors, capacitors, etc. Its purpose is to detect whether there is any damage between the enameled wires of the coil, ensuring the normal operation of the circuit or coil.

Voltage withstand test: The voltage withstand tester is used to test the safety performance of electrical equipment, mainly applied to the testing of household appliances, electrical tools, lighting equipment and other electrical devices. Its purpose is to simulate the situation under high voltage environment and ensure the safety of electrical equipment during operation.

2、 Testing methods and principles
Interturn test: Interturn test usually uses pulse waveform comparison method to detect the insulation performance between turns of the coil by applying high voltage pulses. During testing, an impulse voltage with a specified peak value and wavefront time is applied simultaneously to the tested coil and the reference winding, and the insulation between turns is determined by comparing the attenuation vibration waveforms of the two.

Voltage withstand test: Voltage withstand test mainly checks the insulation performance of electrical equipment under high voltage, ensuring that the equipment will not experience leakage or breakdown under normal operating voltage. The withstand voltage test applies a voltage higher than the normal operating voltage of the equipment to detect indicators such as leakage current, grounding resistance, and insulation resistance.

3、 Application scenarios and standards
Interturn testing: suitable for component testing on production lines, such as testing power supplies, transformers, coils, and inductors. Interturn testing is crucial for ensuring the quality and reliability of electronic components.
Voltage withstand test: suitable for safety performance testing of electrical equipment, widely used for testing household appliances, electrical tools, lighting equipment and other electrical devices. Voltage withstand testing is an important part of electrical equipment safety certification.
Interturn testing and withstand voltage testing have important applications in the electrical industry, targeting different testing requirements and purposes to ensure the safety and reliability of electrical equipment and components.